? 2000 semtech corp. 652 mitchell road newbury park ca 91320 60ma programmable fixed frequency charge pump doubler sc1464 preliminary - august 11, 2000 1 tel:805-498-2111 fax:805-498-3804 web:http:// www.semtech.com description the sc1464 is a versatile charge pump designed for use in battery operated power supply applications. a simple, low current charge pump doubler can be imple- mented without costly inductors or capacitors. internal mosfet?s and control circuitry eliminate the need for costly board space and design time. the small device footprint allows for compact circuit design. the sc1464 charge pump can be used for applications that require up to 60ma of output current with v in = 2.85v and v out = 5.2v. the small 8 lead msop-8 package helps minimize board space. the tf1 and tf2 pins provide binary control of the oscillator frequency to either 1 mhz, 260khz, 32khz or 8khz. the user can change the frequency during oper- ation with extremely fast settling time. features ?= small size - msop-8 package ?= typical efficiency of 90% @ full load ?= designed to work with ceramic or tantalum capacitors ?= soft start functionality ?= short-circuit and over-temperature protection ?= <55a input current @ no load (tf1=0;tf2=1) ?= <330a input current @ no load (tf1=0;tf2=0) ?= oscillator frequency accurate to 5% ?= shutdown current < 1a ?= all specifications rated over the full temperature range (-40c to 85 c) applications ?= cellular phones ?= handheld devices ?= pda power supplies ?= peripheral card supplies ordering information part number (1) package sc1464cms.tr msop-8 note: (1) only available in tape and reel packaging. a reel contains 2500 devices. application circuit cbucket logic input or vin tf1 iout freq 60ma 260khz u1 sc1464 3 7 8 5 6 4 1 2 vo vin gnd c+ c- en tf1 tf2 vo =5.2 v to 6.2 v cout 3.3uf 3.3uf 2.2uf 1.0uf 1.0uf 0.22uf 20ma 260khz 60ma 1mhz vin =3 v +/- 5% 0.22uf 0.22uf 0.10uf 20ma 1mhz 1.0uf 1.0uf 0.22uf tf2 cin cin cout cbucket
? 2000 semtech corp. 652 mitchell road newbury park ca 91320 60ma programmable fixed frequency charge pump doubler sc1464 preliminary - august 11, 2000 2 absolute maximum ratings parameter symbol maximum units input supply voltage v in -0.3 to +4 v output voltage v o -0.3 to +8 v v out short-circuit duration sc indefinite operating ambient temperature range t a -40 to +85 c operating junction temperature t j -40 to +125 c storage temperature range t stg -65 to +150 c lead temperature (soldering) 10 sec t lead 300 c thermal temperature junction to ambient ja 185 c/w thermal impedance junction to case jc 47 c/w parameter symbol test conditions min typ max units input supply voltage v in 2.5 3.5 v input supply current i in i o = 0 tf1 = 0, tf2 = 1, freq = 8khz 45 55 a i o = 0 tf1 = 0, tf2 = 0, freq = 32khz 270 330 i o = 0 tf1 = 1, tf2 = 0, freq = 260khz 1.6 2 ma i o = 0 tf1 = 1, tf2 = 1, freq = 1mhz 5.8 8 en = gnd 1 a output current i o v i = 2.85, tf1 = 0, tf2 = 1. freq = 8khz 5 v i = 2.85, tf1 = 0, tf2 = 0. freq = 32khz 20 ma v i = 2.85, tf1 = 1, tf2 = 0. freq = 260khz 60 v i = 2.85, tf1 = tf2 = 1. freq = 1mhz c bucket = 220nf 45 max. output voltage (3) v out i o = 0 2*v in v short circuit current i sc v o = 0 to v in - 1v, i o = i in 170 ma output ripple (pk-pk) (1)(3) v r i o = 60ma, frequency = 260khz 150 mv power efficiency ? i o = 60ma, tf1 = 1, tf2 = 0 85 % oscillator frequency osc tf1 = 0, tf2 = 1 7.82 8.50 9.18 khz tf1 = 0, tf2 = 0 30.18 32.80 35.42 khz tf1 = 1, tf2 = 0 241.13 262.10 283.07 khz tf1 = tf2 = 1 0.92 1.00 1.08 mhz electrical characteristics unless specified, t a = -40c to 85c, en = v in , c bucket = 2.2f(esr = 0.1 ), c in , c out = 3.3f(esr = 1 ), v in = 3v5%, v out = 5.2v to 6.2v.
? 2000 semtech corp. 652 mitchell road newbury park ca 91320 60ma programmable fixed frequency charge pump doubler sc1464 preliminary - august 11, 2000 3 parameter symbol test conditions min typ max units time to regulation at turn-on (2)(3) t on i o = 0 to 60 ma freq = 260khz 420 1000 s input high threshold v ih all input pins 1.3 v input low threshold v il all input pins 0.4 v inrush current (3) i inrush upon application of v in , maximum average current over 10 periods 750 ma over temperature protection (3) o.t. 170 c over temperature hysteresis (3) o.t.h 10 c electrical characteristics unless specified, t a = -40c to 85c, en = v in , c bucket = 2.2f(esr = 0.1 ), c in , c out = 3.3f(esr = 1 ), v in = 3v5%, v out = 5.2v to 6.2v. notes: (1) all electrical characteristics are for the application circuit on page 2. (2) soft start functionality is performed along with short circuit protection. if v out is less than v in - 200mv, then all switches are turned off and v out is charged with a 70ma current source from v in . when v out reaches v in - 200mv, then a current limit version of the switches are turned on until v out reaches v in + a pmos threshold, at which point all switches are enabled. (3) guaranteed by design.
? 2000 semtech corp. 652 mitchell road newbury park ca 91320 60ma programmable fixed frequency charge pump doubler sc1464 preliminary - august 11, 2000 4 pin description pin# pin name pin function 1 tf1 binary frequency select pins. the frequency is set according to the following table. 2tf2 3 vo voltage output 4 en enable. pull en low to reduce the current on vin to less than 1a. 5 c+ this pin should be connected to the positive terminal of the external charging capacitor. 6 c- this pin should be connected to the negative terminal of the external charging capacitor. 7 vin supply voltage input. 8 gnd ground. tf1 0 1 tf2 0 32khz 260khz 18khz1mhz block diagram thermal shut down pin configuration (msop-8) top view
? 2000 semtech corp. 652 mitchell road newbury park ca 91320 60ma programmable fixed frequency charge pump doubler sc1464 preliminary - august 11, 2000 5 iin vs vin (260khz) 000.0e+0 20.0e-3 40.0e-3 60.0e-3 80.0e-3 100.0e-3 120.0e-3 140.0e-3 2.45 2.65 2.85 3.05 3.25 3.45 3.65 vi n ( v) iin ( a ) 20m a 40 m a 60m a iin vs io (260khz) 000.0e+0 20.0e-3 40.0e-3 60.0e-3 80.0e-3 100.0e-3 120.0e-3 140.0e-3 1.e-02 2.e-02 3.e-02 4.e-02 5.e-02 6.e-02 7.e-02 io (a) iin ( a ) vi n = 2. 5 vi n = 3 vi n = 3. 5 vo vs io (260khz) 3.000 3.500 4.000 4.500 5.000 5.500 6.000 6.500 7.000 7.500 2.e-02 3.e-02 3.e-02 4.e-02 4.e-02 5.e-02 5.e-02 6.e-02 6.e-02 io (a) vo (v) vi n = 2. 5 vi n = 3. 0 vi n = 3. 5 eff vs io (260khz) 92.00% 92.50% 93.00% 93.50% 94.00% 94.50% 95.00% 95.50% 10.0e-3 20.0e-3 30.0e-3 40.0e-3 50.0e-3 60.0e-3 70.0e-3 io (a) eff (%) vi n = 2. 5 vi n = 3. 0 vi n =3. 5 eff vs vin (260khz) 90. 00% 92. 00% 94. 00% 96. 00% 2. 50 2. 70 2. 90 3. 10 3. 30 3. 50 vi n ( v) eff ( % ) 60m a eff vs vo (260khz) 90.00% 92.00% 94.00% 96.00% 4. 50 5.00 5. 50 6.00 6. 50 7.00 vo ( v) eff ( % ) 20 m a 40 m a 60 m a
? 2000 semtech corp. 652 mitchell road newbury park ca 91320 60ma programmable fixed frequency charge pump doubler sc1464 preliminary - august 11, 2000 6 vo vs vin (260khz) 4. 000 4. 500 5. 000 5. 500 6. 000 6. 500 7. 000 2.50 2.70 2.90 3.10 3.30 3.50 vin (v) vo (v) 20 ma 40 ma 60 ma
? 2000 semtech corp. 652 mitchell road newbury park ca 91320 60ma programmable fixed frequency charge pump doubler sc1464 preliminary - august 11, 2000 7 iin vs ta (260khz) @ io = 0ma 900.0e-6 1.1e-3 1.3e-3 1.5e-3 1.7e-3 1.9e-3 2.1e-3 2.3e-3 -40-20 0 20406080100 ta (deg. c.) iin (a) vin = 3.5 vin = 3 vin = 2.5 iin vs ta (1mhz) @ io = 0ma 4.0e-3 4.5e-3 5.0e-3 5.5e-3 6.0e-3 6.5e-3 7.0e-3 7.5e-3 -40 -20 0 20 40 60 80 100 ta (deg. c.) iin (a) vin = 3.5 vin = 3 vin = 2.5 iin vs ta (32khz) @ io = 0ma 180.0e-6 200.0e-6 220.0e-6 240.0e-6 260.0e-6 280.0e-6 300.0e-6 320.0e-6 -40-200 20406080100 ta (deg. c.) iin (a) vin = 3.5 vin = 3 vin = 2.5 iin vs ta (8khz) @ io = 0ma 25.0e-6 30.0e-6 35.0e-6 40.0e-6 45.0e-6 50.0e-6 55.0e-6 60.0e-6 -40-200 20406080100 ta (deg. c.) iin (a) vin = 3.5 vin = 3 vin = 2.5
? 2000 semtech corp. 652 mitchell road newbury park ca 91320 60ma programmable fixed frequency charge pump doubler sc1464 preliminary - august 11, 2000 8 vo vs ta (260khz) @ vin = 3.00 v 5.5 5.6 5.7 5.8 5.9 6 6.1 6.2 -40.00 -20.00 0.00 20.00 40.00 60.00 80.00 100.00 ta (deg. c.) vo (v) 0 ma 20 ma 40 ma 60 ma vo vs ta (1mhz) @ vin = 3.00 v 5.5 5.6 5.7 5.8 5.9 6 6.1 6.2 -40.00 -20.00 0.00 20.00 40.00 60.00 80.00 100.00 ta (deg. c.) vo (v) 0 ma 20 ma 40 ma 60 ma vo vs ta (32khz) @ vin = 3.00 v 5.5 5.6 5.7 5.8 5.9 6 6.1 -40.00 -20.00 0.00 20.00 40.00 60.00 80.00 100.00 ta (deg. c.) vo (v) 0 ma 1 ma 2 ma v o vs ta (8khz) @ vin = 3.00 v 5.8 5.85 5.9 5.95 6 6.05 6.1 6.15 6.2 -40.00 -20.00 0.00 20.00 40.00 60.00 80.00 100.00 ta (deg. c.) vo (v) 0 ma 1 ma 2 ma
? 2000 semtech corp. 652 mitchell road newbury park ca 91320 60ma programmable fixed frequency charge pump doubler sc1464 preliminary - august 11, 2000 9 eff vs ta @ vin =3.00 v, io = 2 ma 82.00% 84.00% 86.00% 88.00% 90.00% 92.00% 94.00% 96.00% 98.00% 100.00% -40.00 -20.00 0.00 20.00 40.00 60.00 80.00 100.00 ta (deg. c.) eff ( % ) f = 8 khz f = 32khz eff vs ta @ vin =3.00 v, io = 1 m a 82.00% 84.00% 86.00% 88.00% 90.00% 92.00% 94.00% 96.00% 98.00% -40.00 -20.00 0.00 20.00 40.00 60.00 80.00 100.00 ta (deg. c.) eff ( % ) f = 8 khz f = 32khz eff vs io (260khz) @ vin =3.00 v 94.00% 94.20% 94.40% 94.60% 94.80% 95.00% 95.20% 95.40% 95.60% 95.80% 1.50e-02 2.50e-02 3.50e-02 4.50e-02 5.50e-02 6.50e-02 io (a) eff (%) ta = 25 deg. c. ta = -40 deg. c. ta = 85 deg. c.
? 2000 semtech corp. 652 mitchell road newbury park ca 91320 60ma programmable fixed frequency charge pump doubler sc1464 preliminary - august 11, 2000 10 outline drawing - msop-8 land pattern - msop-8 ecn 00-1246
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