View RT9503A_4853838.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

RT9503A 1 ds9503a-01 april 2011 www.richtek.com features z z z z z automatic input supplies selection z z z z z 18v maximum rating for ac adapter z z z z z integrated selectable 100ma and 500ma usb charge current z z z z z internal integrated power mosfets z z z z z ac adapter power good status indicator z z z z z charge status indicator z z z z z external capacitor programmable safety timer z z z z z under voltage protection z z z z z over voltage protection z z z z z automatic recharge feature z z z z z battery temperature monitoring z z z z z small 16-lead wqfn package z z z z z thermal feedback optimizing charge rate z z z z z power path controller z z z z z rohs compliant and halogen free pin configurations applications z digital cameras z cellular phones z pdas , smart phones and mp3 players z portable instruments ordering information general description the RT9503A is a fully integrated low cost single-cell li- ion battery charger ic ideal for portable applications. the RT9503A is capable of being powered up via the ac adapter and usb (universal serial bus) port inputs. the RT9503A can automatically detect and select the ac adapter and the usb port as the power source for the charger. the RT9503A enters sleep mode when both supplies are removed. the RT9503A optimizes the charging task by using a control algorithm including preconditioning mode, fast charge mode, and constant voltage mode. the charging task is terminated as the charge current drops below the preset threshold. the usb charge current can be selected from preset ratings of 100ma and 500ma, while the ac adapter charge current can be programmed up to 1a with an external resistor. the internal thermal feedback circuitry regulates the die temperature to optimize the charge rate for all ambient temperatures. the RT9503A features 18v and 7v maximum rating voltages for ac adapter and usb port inputs respectively. other features include external programmable safety timer, under voltage protection, over voltage protection for ac adapter supply, battery temperature monitoring, power supply status indicators and charge status indicator. (top view) wqfn-16l 3x3 fully integrated linear single cell li-ion battery charger with power path note : richtek products are : ` rohs compliant and compatible with the current require- ments of ipc/jedec j-std-020. ` suitable for use in snpb or pb-free soldering processes. acin ts timer batt gnd isetu iseta nc sys nc 12 11 10 9 13 14 15 16 1 2 3 4 8 7 6 5 gnd 17 chg_s ac_pgood en usb bat_on ac_on RT9503A package type qw : wqfn-16l 3x3 (w-type) lead plating system p : pb free g : green (halogen free and pb free)
RT9503A 2 ds9503a-01 april 2011 www.richtek.com typical application circuit functional pin description pin no. pin name pin function 1 acin wall adaptor charge supply input. 2 usb usb charge supply input. 3 chg_s charge status indicator output (open drain). 4 ac_pgood wall adaptor power good indicator output (open drain). 5, 17 (exposed pad) gnd ground. the exposed pad must be soldered to a large pcb and connected to gnd for maximum power dissipation. 6 iseta wall adaptor supply charge current set point. 7 isetu usb supply charge current set input (active low). 8, 14 nc no internal connection. 9 en charge enable (active low). 10 timer safe charge timer setting. 11 ts temper ature sense input. 12 batt battery charge current output. 13 bat_on power path controller output. pull low to turn on the external p-mosfet. 15 sys system voltage detecting input. 16 ac_on p-mosfet switch control output (open drain). marking information hk=ym dnn hk= : product code ymdnn : date code RT9503A 3 4 1 batt timer sys 11 12 13 6 acin iseta ts 10 15 2 usb + battery pack c tmr 0.1f chip enable 5, exposed pad (17) gnd 9 en ac_pgood ac_on chg_s bat_on usb v in adapter system 7 isetu 16 10f 1f 1f 1f r seta
RT9503A 3 ds9503a-01 april 2011 www.richtek.com function block diagram pre-charge phase fast charge phase constant voltage phase & standby phase re-charge phase programmed charge current 4.1v recharge threshold 2.8v precharge threshold 1/10 programmed charge current charge complete battery voltage charging current charging i-v curve charge input selection acin/usb acin usb iseta batt acin p-mosfet sense mosfet usb p-mosfet sense mosfet gnd precharge controller logic temperature sense 1a ts vcc/usb en isetu 1a 7.5k 1.5k v fb drv ovp + - 2.5v ovp comparator - + + - batt sys v os vh hys logic ovp ac_on bat_on chg_s timer timer ac_pgood
RT9503A 4 ds9503a-01 april 2011 www.richtek.com table start-up precharge phase fast charge phase standby/fault recharge phase RT9503A flow chart disable uvp sleep start-up acin/usb power up v /ce > 1.4v ? no no v acin < 3v and v usb < 3v? disable mode pfet off i batt = 0 yes uvp mode pfet off i batt = 0 yes v acin < v batt and v usb < v batt ? sleep mode pfet off i batt = 0 yes v batt > 2.8v? no i batt = 0.1 charge current /chg_s strong pull down no ?t charge up? 1ms delay & start timer v batt > 2.8v? no i batt = charge current /chg_s strong pull down yes yes yes no v ts > 2.5v or v ts < 0.5v? time fault i batt < 0.1 i chg ? yes t charge up? no no yes standby pfet off i batt = 0 yes temp fault yes /chg_s high impedance v batt > 4.1 v? yes v batt > 4.1 v? no rechar ge yes no ovp mode no
RT9503A 5 ds9503a-01 april 2011 www.richtek.com absolute maximum ratings (note 1) z supply input voltage, acin -------------------------------------------------------------------------------------------- ? 0.3v to 18v z supply input v oltage, usb -------------------------------------------------------------------------------------------- ? 0.3v to 7v z chg_s, ac_pgood, ac_on ---------------------------------------------------------------------------------------- ? 0.3v to 18v z other pins ----------------------------------------------------------------------------------------------------------------- ? 0.3v to 5.5v z power dissipation, p d @ t a = 25 c wqfn-16l 3x3 ----------------------------------------------------------------------------------------------------------- 1.471w z package thermal resistance (note 2) wqfn-16l 3x3, ja ----------------------------------------------------------------------------------------------------- 68 c/w wqfn-16l 3x3, jc ----------------------------------------------------------------------------------------------------- 7.5 c/w z lead temperature (soldering, 10 sec.) ----------------------------------------------------------------------------- 260 c z junction temperature --------------------------------------------------------------------------------------------------- 150 c z storage temperature range ------------------------------------------------------------------------------------------- ? 65 c to 150 c z esd susceptibility (note 3) hbm (human body mode) --------------------------------------------------------------------------------------------- 2kv mm (machine mode) ---------------------------------------------------------------------------------------------------- 200v electrical characteristics (acin = usb = 5v, t a = 25 c, unless otherwise specification) to be continued recommended operating conditions (note 4) z supply input voltage range, acin ----------------------------------------------------------------------------------- 4.5v to 12v z supply input voltage ra nge, usb ----------------------------------------------------------------------------------- 4.1v to 6v z junction temperature range ------------------------------------------------------------------------------------------ ? 20 c to 125 c z ambient temperature range ------------------------------------------------------------------------------------------ ? 20 c to 85 c parameter symbol test conditions min typ max unit supply input acin uvp rising threshold voltage v uv _acin -- 3 -- v usb uvp rising threshold voltage v uv _usb v batt = 3v -- 3 -- v acin/usb uvp hysteresis v uv _hys v batt = 3v -- 100 -- mv acin/usb standby current i stby v batt = 4.5v -- 300 500 a batt sleep leakage current i sleep v acin = 4v, v usb = 4v, v batt = 4.5v -- 5 15 a voltage regulation batt regulation voltage v re g i batt = 60ma 4.138 4.2 4.262 v acin mosfet dropout v batt = 4v, i chg_ac = 1a 400 500 620 mv usb mosfet dropout v batt = 4v, i chg_usb = high 500 650 800 mv current regulation iseta set voltage (fast charge phase) v iseta_fchg v batt = 3.5v 2.43 2.48 2.53 v full charge setting range i chg_ac 100 -- 1000 ma ac charge current accuracy i chg_ac v batt = 3.8v, r iset = 1.5k -- 500 -- ma
RT9503A 6 ds9503a-01 april 2011 www.richtek.com parameter symbol test conditions min typ max unit pre cha rg e batt pre-charge threshold v prech 2.7 2.8 2.9 v batt pre-charge threshold hysteresis v prech 60 100 140 mv pr e-charge current i pchg v batt = 2v 8 10 12 % recharge threshold batt re-charge falling threshold hysteresis v rech_l 50 95 140 mv charge termination detection termination current ratio (note5) i term v batt = 4.2v -- 10 -- % logic input/output chg_s pull down voltage v chg_s i chg_s = 5ma -- 213 -- mv ac_pgood pull down voltage v p good i p good = 5ma -- 213 -- mv pgood pull down voltage v pgood i p good = 5ma -- 65 -- mv logic-high v ih 1.5 -- -- v en threshold volta ge logic-low v il -- -- 0.4 v en pin input current i en -- -- 1.5 a high voltage v isetu_high 1.5 -- v isetu threshold low voltage v isetu_low -- -- 0.4 v isetu pin input current i isetu -- -- 1.5 a usb charge current & timing soft-start time t ss v iseta from 0v to 2.5v -- 100 -- s usb charge current i chg_usb v acin = 2.5v, v usb = 5v, v batt =3.5v, v is etu = 5v 400 450 500 ma usb charge current i chg_usb v acin = 2.5v, v usb = 5 v, v batt = 3.5v, v isetu = 0v 60 80 100 ma timer timer pin source current i time v timer = 2v -- 1 -- a pr e-charge fault time t pchg_f c timer = 0.1 f, f clk = 7hz 1720 2460 3200 s charge fault time t fchg_f c timer = 0.1 f, f clk = 7hz 13790 19700 25610 s battery temperature sense ts pin source current i ts v ts = 1.5v -- 102 -- a high voltage v ts_high 0.485 0.5 0.515 v ts pin threshold low voltage v ts_low 2.45 2.5 2.55 v protection thermal regulation -- 125 -- c ovp set voltage internal default -- 6.5 -- v power path controller bat _on pull lo w as sys falling, v batt = 4v, sys-bat ? 150 -- ? 20 mv to be continued
RT9503A 7 ds9503a-01 april 2011 www.richtek.com note 1. stresses listed as the above ? absolute maximum ratings ? may cause permanent damage to the device. these are for stress ratings. functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. exposure to absolute maximum rating conditions for extended periods may remain possibility to affect device reliability. note 2. ja is measured in the natural convection at t a = 25 c on a high effective thermal conductivity four-layer test board of jedec 51-7 thermal measurement standard. the measurement case position of jc is on the exposed pad of the package. note 3. devices are esd sensitive. handling precaution is recommended. note 4. the device is not guaranteed to function outside its operating conditions. note 5. guaranteed by design. parameter symbol test conditions min typ max uni bat _on pull hig h as sys raising, v batt = 4v, sys-bat ? 50 -- 0 mv bat_on pull low switch resistance v batt = 4v -- 10 -- bat_on pull high switch resistance v acin = 5v -- 30 --
RT9503A 8 ds9503a-01 april 2011 www.richtek.com typical operating characteristics iseta voltage vs. temperature 2.40 2.42 2.44 2.46 2.48 2.50 2.52 2.54 -25-15-5 5 1525354555657585 temperature iseta voltage (v) v batt = 3.8v, acin = 5v, i charger = 500ma ( c) charge current vs. r seta 0 200 400 600 800 1000 1200 0.51.52.53.54.55.56.57.58.59.5 r seta (k [ ) charge current (ma) v batt = 3.8v, acin = 5v (k ) enable threshold voltage v s. input voltage 0.0 0.4 0.8 1.2 1.6 2.0 4.5 4.8 5.1 5.4 5.7 6 6.3 6.6 input voltage (v) enable threshold voltage (v) v batt = 3.8v, i charger = 500ma rising falling iseta voltage vs. acin voltage 2.40 2.42 2.44 2.46 2.48 2.50 2.52 2.54 4.5 4.8 5.1 5.4 5.7 6 6.3 6.6 acin voltage (v) iseta voltage (v) v batt = 3.8v, i charger = 500ma ts current vs. temperature 95 96 97 98 99 100 101 102 103 104 105 -25-15-5 5 1525354555657585 temperature ts current ( a) v batt = 3.8v, acin = 5v, i charger = 500ma ( c) ts current vs. input voltage 95 96 97 98 99 100 101 102 103 104 105 4.5 4.8 5.1 5.4 5.7 6 6.3 6.6 input voltage (v) ts current ( a) v batt = 3.8v, i charger = 500ma
RT9503A 9 ds9503a-01 april 2011 www.richtek.com usb power off time (500 s/div) v batt (5v/div) v sys (5v/div) v usb (5v/div) i usb (1a/div) i sys = 500ma, i charger = 500ma isetu threshold voltage vs. usb voltage 0.0 0.4 0.8 1.2 1.6 2.0 4.5 4.8 5.1 5.4 5.7 6 6.3 6.6 usb voltage (v) isetu threshold voltage (v) v batt = 3.8v rising falling regulation voltage vs. temperature 4.14 4.16 4.18 4.20 4.22 4.24 4.26 -25-15-5 5 1525354555657585 temperature regulation voltage (v) acin = 5v, i charger = 500ma ( c) acin power off time (500 s/div) v batt (5v/div) v sys (5v/div) v in (5v/div) i acin (1a/div) i sys = 500ma, i charger = 500ma usb power on time (1ms/div) en (5v/div) v sys (5v/div) v usb (5v/div) i usb (1a/div) v batt = 3.7v, i sys = 500ma, i charger = 500ma acin power on time (1ms/div) en (5v/div) v sys (5v/div) v acin (5v/div) i acin (1a/div) v batt = 3.7v, i sys = 500ma, i charger = 500ma
RT9503A 10 ds9503a-01 april 2011 www.richtek.com application information the RT9503A is a fully integrated low cost single-cell li- ion battery charger for portable applications. the RT9503A can be adopted for two input power source including ac and usb inputs. it will automatically select the input source and operate in different mode as below. ac mode : when the ac input voltage (acin) is higher than the uvp voltage level (3v), the RT9503A will enter ac mode. in the ac mode, acin p-mosfet is turned on and usb p-mosfet is turned off. when acin voltage is below and ovp threshold levels, the switch q1 will be turned on and q2 will be turned off. so, the system load is powered directly from the adapter through the transistor q1, and the battery is charged by the RT9503A. once the acin voltage is higher than the ovp, the RT9503A stops charging, and then q1 will be turned off and q2 will be turned on to supply the system by battery. usb mode : when ac input voltage (acin) is removed and usb input voltage is higher than uvp voltage level (3v), the RT9503A will operate in the usb mode. in the usb mode, acin p-mosfet is turned off while usb p-mosfet and q2 are turned on. the system load is powered directly from the usb/battery through the switch q2. note that in this mode, the battery will be discharged once the system current is higher than the battery charge current. sleep mode : the RT9503A will enter sleep mode when both ac and usb input voltage are removed. this feature provides low leakage current from the battery during the absence of input supply. figure 1. input power source operation mode power-path management the RT9503A powers the system and independently charging the battery while the input source is ac. this feature reduces the charge time, allows for proper charge termination, and allows the system to run with an absent or defective battery pack. case 1 : input source is ac in this case, the system load is powered directly from the ac adapter through the transistor q1. for RT9503A, q1 and q2 act as a switch as long as the RT9503A is ready. once the ac voltage is ready (RT9503A internal mosfet and q1 starts regulating the output voltage supply system (q2 is turn off). once the ac voltage is higher than the operation voltage (>ovp), the RT9503A stop charging battery, q1 turns off and q2 starts to supply power for system. figure 2. acin input case 2 : input source is usb in this case, the system load is powered directly from the battery through the switch q2. note that in this case, the system current over battery charge current will lead to battery discharge. figure 3. usb input acin mode usb mode v acin removed v usb > uvp sleep mode both v acin and v usb removed v acin > uvp RT9503A batt sys acin usb battery ac_on bat_on usb system + q1 q2 v in i charger i sys RT9503A batt sys acin usb battery ac_on bat_on usb system + q1 q2 v in i charger i sys
RT9503A 11 ds9503a-01 april 2011 www.richtek.com acin over-voltage protection the acin input voltage is monitored by an internal ovp comparator. the comparator has an accurate reference of 2.5v from the band-gap reference. the ovp threshold is set by the internal resistor. the protection threshold is set to 6.5v, but acin input voltage over 18v still leads the RT9503A to damage. when the input voltage exceeds the threshold, the comparator outputs a logic signal to turn off the power p-mosfet to prevent the high input voltage from damaging the electronics in the handheld system. when the input over voltage condition is removed (acin < 6v), the comparator re-enables the output by running through the soft-start. battery temperature monitoring the RT9503A continuously monitors battery temperature by measuring the voltage between the ts and gnd pins. the RT9503A has an internal current source to provide the bias for the most common 10k negative-temperature coefficient thermal resistor (ntc) (see figure 4). the RT9503A compares the voltage on the ts pin against the internal v ts_high and v ts_low thresholds to determine if charging is allowed. when the temperature outside the v ts_high and v ts_low thresholds is detected, the device will immediately stop charging. the RT9503A stops charging and keeps monitoring the battery temperature when the temperature-sense voltage is back to the threshold between v ts_high and v ts_low , the charger will be resumed. charge is resumed when the temperature returns to the normal range. however, the user may modify thresholds via the negative-temperature coefficient thermal resistor or by adding two external resistors. (see figure 5.) the capacitor should be placed close to ts (pin 11) and connected to the ground plane. the capacitance value (0.1 f to 10 f) should be selected according to the quality of pcb layout. it is recommended to use 10 f if the layout is poor for noise prevention. figure 4. temperature sensing configuration ts ts ntc ts ts v = i r turn off when v 2.5v or v 0.5v ? figure 5. temperature sensing circuit t2 t1 ntc ts ts t1 t2 ntc ts ts r(r + r) v = i r + r + r turn off when v 2.5v or v 0.5v ? fast-charge current setting case 1: acin mode the iseta pin is used to determine the acin charge rate from 100ma to 1a. the charge current can be calculated as following equation. _ set chg ac set seta v i = k r the parameter k set = 300 ; v set = 2.5v. r seta is the resistor connected between iseta and gnd. + 0.1f to 10f battery a ts temperature sense i ts v batt ntc + r t2 battery a ts temperature sense i ts v batt ntc r t1 0.1f to 10f
RT9503A 12 ds9503a-01 april 2011 www.richtek.com 0 200 400 600 800 1000 1200 0.5 1.5 2.5 3.5 4.5 5.5 6.5 7.5 8.5 9.5 r seta (k) charge current (ma) r seta (k ) figure 6. ac mode charge current setting case 2 : usb mode when charging from a usb port, the isetu pin can be used to determine the charge current of 100ma or 500ma. a low-level signal of isetu pin sets the charge current at 100ma and a high level signal sets the charge current at 500ma. pre-charge current setting during a charge cycle, if the battery voltage is below the v prech threshold, the RT9503A applies a pre-charge mode to the battery. this feature revives deeply discharged cells and protects battery life. the RT9503A internally determines the pre-charge rate as 10% of the fast-charge current. battery voltage regulation the RT9503A monitors the battery voltage through the batt pin. once the battery voltage level closes in on the v reg threshold, the RT9503A voltage enters constant phase and the charging current begins to taper down. when battery voltage is over the v reg threshold, the RT9503A will stop charging but continue to monitor the battery voltage. however, when the battery voltage decreases 100mv below v reg , it will be recharged to preserve the battery voltage. charge status outputs the open-drain chg_s and ac_pgood outputs indicate various charger operations as shown in the following table. these status pins can be used to drive leds or communicate to the host processor. note that on indicates the open-drain transistor is turned on and led bright. charge state chg_s ac_pgood charge on on acin charge done off on charge on off usb charge done off off temperature regulation and thermal protection in order to maximize the charge rate, the RT9503A features a junction temperature regulation loop. if the power dissipation of the ic results in a junction temperature greater than the thermal regulation threshold (125 c), the RT9503A throttles back on the charge current in order to maintain a junction temperature around the thermal regulation threshold (125 c). the RT9503A monitors the junction temperature, t j , of the die and disconnects the battery from the input if t j exceeds 125 c. this operation continues until junction temperature falls below thermal regulation threshold (125 c) by the hysteresis level. this feature prevents the maximum power dissipation from exceeding typical design conditions. external timer as a safety mechanism, the RT9503A provides a user- programmable timer that monitors the pre-charge and fast charge time. this timer (charge safety timer) is started at the beginning of the pre-charge and fast charge period. the safety charge timeout value is set by the value of an external capacitor connected to the timer pin (c tmr ), if the timer pin is short to gnd, the charge safety timer is disabled. as c tmr = 0.1 f, t pchg_f is ~2460 secs and t fchg_f is 8 x t pchg_f . t pchg_f = c tmr x 2460/0.1 when timer faults, re-plug-in power or pull high and then pull low en to release the fault condition. selecting the input and output capacitors in most applications, the most important is the high frequency decoupling capacitor on the input of the RT9503A. a 1 f ceramic capacitor, placed in close proximity to input
RT9503A 13 ds9503a-01 april 2011 www.richtek.com pin and gnd pin is recommended. in some applications depending on the power supply characteristics and cable length, it may be necessary to add an additional 10 f ceramic capacitor to the input. the RT9503A requires a small output capacitor for loop stability. a 1 f ceramic capacitor placed between the batt pin and gnd is typically sufficient. thermal considerations for continuous operation, do not exceed absolute maximum junction temperature. the maximum power dissipation depends on the thermal resistance of the ic package, pcb layout, rate of surrounding airflow, and difference between junction and ambient temperature. the maximum power dissipation can be calculated by the following formula : p d(max) = (t j(max) ? t a ) / ja where t j(max) is the maximum junction temperature, t a is the ambient temperature, and ja is the junction to ambient thermal resistance. for recommended operating condition specifications of RT9503A, the maximum junction temperature is 125 c and t a is the ambient temperature. the junction to ambient thermal resistance, ja , is layout dependent. for wqfn-16l 3x3 packages, the thermal resistance, ja , is 68 c/w on a standard jedec 51-7 four-layer thermal test board. the maximum power dissipation at t a = 25 c can be calculated by the following formula : p d(max) = (125 c ? 25 c) / (68 c/w) = 1.471w for wqfn-16l 3x3 package the maximum power dissipation depends on the operating ambient temperature for fixed t j(max) and thermal resistance, ja . for RT9503A package, the derating curve in figure 7 allows the designer to see the effect of rising ambient temperature on the maximum power dissipation. figure 7. derating curves for RT9503A package layout consideration the RT9503A is a fully integrated low cost single-cell li- ion battery charger ideal for portable applications. careful pcb layout is necessary. the following guidelines should be strictly followed to achieve best performance of the RT9503A. ` input capacitor should be placed close to the ic and connected to the ground plane. the trace of the input in the pcb should be placed far away from the sensitive devices or shielded by the ground. ` the gnd should be connected to a strong ground plane for heat sinking and noise protection. ` connection of the r seta should be isolated from other noisy traces. a short wire is recommended to prevent emi and noise coupling. ` output capacitor should be placed close to the ic and connected to ground plane to reduce noise coupling. 0.00 0.20 0.40 0.60 0.80 1.00 1.20 1.40 1.60 0 25 50 75 100 125 ambient temperature (c) maximum power dissipation (w) 1 four-layer pcb
RT9503A 14 ds9503a-01 april 2011 www.richtek.com figure 8. pcb layout guide gnd acin ts timer batt gnd isetu iseta nc sys nc 12 11 10 9 13 14 15 16 1 2 3 4 8 7 6 5 17 chg_s ac_pgood en usb bat_on ac_on sys battery r seta the capacitors should be placed close to the ic and connected to ground plane. connection of r seta should be isolated from other noisy traces. the gnd should be connected to a strong ground plane for heat sinking and noise protection.
RT9503A 15 ds9503a-01 april 2011 www.richtek.com richtek technology corporation headquarter 5f, no. 20, taiyuen street, chupei city hsinchu, taiwan, r.o.c. tel: (8863)5526789 fax: (8863)5526611 richtek technology corporation taipei office (marketing) 5f, no. 95, minchiuan road, hsintien city taipei county, taiwan, r.o.c. tel: (8862)86672399 fax: (8862)86672377 email: marketing@richtek.com information that is provided by richtek technology corporation is believed to be accurate and reliable. richtek reserves the ri ght to make any change in circuit design, specification or other related things if necessary without notice at any time. no third party intellectual property inf ringement of the applications should be guaranteed by users when integrating richtek products into any application. no legal responsibility for any said applications i s assumed by richtek. outline dimension a a1 a3 d e 1 d2 e2 l b e see detail a dimensions in millimeters dimensions in inches symbol min max min max a 0.700 0.800 0.028 0.031 a1 0.000 0.050 0.000 0.002 a3 0.175 0.250 0.007 0.010 b 0.180 0.300 0.007 0.012 d 2.950 3.050 0.116 0.120 d2 1.300 1.750 0.051 0.069 e 2.950 3.050 0.116 0.120 e2 1.300 1.750 0.051 0.069 e 0.500 0.020 l 0.350 0.450 0.014 0.018 w-type 16l qfn 3x3 package note : the configuration of the pin #1 identifier is optional, but must be located within the zone indicated. det ail a pin #1 id and tie bar mark options 1 1 2 2

▲Up To Search▲

Price & Availability of RT9503A

	To Download RT9503A Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .