TCV7101F 2011-10-27 1 toshiba cmos integrated circuit silicon monolithic TCV7101F buck dc-dc converter ic the TCV7101F is a single-chip buck dc-dc converter ic. the TCV7101F contains high-sp eed and low-on-resistance power mosfets to achieve synchronous rectification using an external low-side mosfet, or rectification using an external diode, allowing for high efficiency. features ? enables up to 3.8 a of load current (i out ) with a minimum of external components. ? high efficiency: = 95% (typ.) (@v in = 5 v, v out = 3.3 v, i out = 1.5 a) (when using the tpc6008-h as a low-side mosfet) ? operating voltage range: v in = 2.7 v to 5.5 v ? low on-resistance: r ds (on) = 0.08 ? (high-side) typical (@v in = 5 v, tj = 25c) ? oscillation frequency: f osc = 600 khz (typ.) ? feedback voltage: v fb = 0.8 v 1% (@ tj = 25 c) ? incorporates an n-channel mosfet driver for synchronous rectification ? uses internal phase compensation to achieve high efficiency with a minimum of external components. ? allows the use of a small surface-mount ceramic capacitor as an output filter capacitor. ? housed in a small surface-mount package (sop advance) with a low thermal resistance. ? soft-start time adjustable by an external capacitor part marking pin assignment this product has a mos structure and is sensitive to electrostatic discharge. handle with care. the product(s) in this document (?product?) contain fu nctions intended to protect the product from temporary small overloads such as minor short-term overcurrent, or overheating. the pr otective functions do not necessarily protect product under all circumstances. when incorporating product into your system, please design the system (1) to avoid such overloads upon the product, and (2) to shut down or otherwise relieve the product of such overload conditions immediately upon occurrence. for details, please refer to the notes appearing below in this document and other documents referenced in this document. hson8-p-0505-1.27 weight: 0.068 g (typ.) part number (or abbreviation code) tcv 7101f lot no. the dot ( ? ) on the top surface indicates pin 1. * : the lot number consists of three digits. the first digit represents the last di git of the year of manufacture, and the following two digits indicates the week of manufacture between 01 and either 52 or 53. manufacturing week code (the first week of the year is 01; the last week is 52 or 53.) manufacturing year code (last digit of the year of manufacture3 v fb 5 lsg 7 en 6 2 v in2 3 ss 4 gnd l x 8 1 v in1
TCV7101F 2011-10-27 2 ordering information part number shipping TCV7101F (te12l, q) embossed tape (3000 units per reel) block diagram pin description pin no. symbol description 1 v in1 input pin for the output section this pin is placed in the standby state if v en = low. standby current is 10 a or less. 2 v in2 input pin for the control section this pin is placed in the standby state if v en = low. standby current is 10 a or less. 3 ss soft-start pin when the ss input is left open, the soft-start time is 1 ms (typ.). the soft-start time can be adjusted with an external capacitor. the exte rnal capacitor is charged from a 8 a (typ.) constant-current source, and the reference voltage of the error amplifier is regulated between 0 v and 0.8 v. the external capacitor is discharged when en = low and in case of undervoltage lockout or thermal shutdown. 4 gnd ground pin 5 v fb feedback pin this input is fed into an internal error amplifier with a reference voltage of 0.8 v (typ.). 6 en enable pin when en 1.5 v (@ v in = 5 v), the internal circuitry is allowed to operate and thus enable the switching operation of the output section. when en 0.5 v (@ v in = 5 v), the internal circuitry is disabled, putting the TCV7101F in standby mode. this pin has an internal pull-down resistor of approx. 500 k ? . 7 lsg gate drive pin for the low-side switch 8 l x switch pin this pin is connected to high-side p-channel mosfet. control logic current detection v in1 l x lsg + - slope compensation under voltage lockout v in2 constant-current source (8 a) gnd + - phase compensation soft start error amplifier ref. voltage (0.8 v) en v fb ss - short-circuit protection driver oscillator
TCV7101F 2011-10-27 3 absolute maximum ratings (ta = 25c) characteristics symbol rating unit input pin voltage for the output section v in1 ?0.3 to 6 v input pin voltage for the control section v in2 ?0.3 to 6 v soft-start pin voltage v ss ?0.3 to 6 v feedback pin voltage v fb ?0.3 to 6 v enable pin voltage v en ?0.3 to 6 v v en ? v in2 voltage difference v en -v in2 v en ? v in2 < 0.3 v lsg pin voltage v lsg ?0.3 to 6 v switch pin voltage (note 1) v lx ?0.3 to 6 v switch pin current i lx ?4. 6 a power dissipation (note 2) p d 2.2 w operating junction temperature t jopr ? 40 to125 c junction temperature (note 3) t j 150 c storage temperature t stg ? 55 to150 c note: using continuously under heavy loads (e.g. the application of high temperature/current/voltage and the significant change in temperature, etc.) may cause this pr oduct to decrease in the reliability significantly even if the operating conditions (i.e. operat ing temperature/current/voltage, etc.) are within the absolute maximum ratings and the operating ranges. please design the appropriate reliability upon reviewing the toshiba semiconductor reliability handbook (?handling precautions?/?derating concept and methods?) and individual reliability data (i.e. reliability test report and estimated failure rate, etc) note 1: the switch pin voltage (v lx ) doesn?t include the peak voltage generated by TCV7101F?s switching. a negative voltage generated in dead time is permitted among the switch pin current (i lx ). thermal resistance characteristics characteristics symbol max unit thermal resistance, junction to ambient r th (j-a) 44.6 (note 2) c/w thermal resistance, junction to case
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