TPS5140

TPS5140 FOUR-CHANNEL DC/DC CONTROLLER FOR NOTEBOOK PC POWER SLVS305A – DECEMBER 2000 – REVISED JANUARY 2001 D Three Independent Step-Down DC/DC PAG PACKAGE Controllers and One 12-V Boost DC/DC (TOP VIEW) INV1 NC NC LH1 OUT1_u LL1 NC OUT1_d OUTGND1 TRIP1 VCC _SENSE12 TRIP2 OUTGND2 OUT2_d LL2 OUT2_u Converter D 4.5 V – 28 V Input Voltage Range D Step-Down Controller Output Voltages Adjustable Down to 1.2 V D Synchronous-Buck Operation for High 64 63 62 61 60 59 58 57 56 55 54 53 52 51 50 49 Efficiency FB1 1 48 LH2 D PWM Mode Control SOFTSTART1 2 NC 3 47 NC 46 VCC D Auto PWM/SKIP Mode for High INV2 4 45 NC Efficiency Under All Load Conditions D High Speed Error Amplifier FB2 5 SOFTSTART2 6 PWM_SEL 7 44 VREF3.3 43 VREF5 42 REG5V_IN D Separate Standby Control and Over Ct 8 GND 9 Current Protection for Each Channel REF 10 D Over Voltage and Under Voltage STBY_VREF3.3 11 Protection STBY_VREF5 12 STBY1 13 D Programmable Short Circuit Protection STBY2 14 41 NC 40 GND_UP 39 LL_UP 38 IN_12V 37 OUT_12V 36 NC 35 VCC_SENSE3 D Power Good With Programmable Delay Time STBY12V STBY3 15 34 16 33 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 TRIP3 NC D 5 V and 3.3 V Linear Regulators SCP PGOUT PG–DELAY NC EXT_PG OFTSTART_12V PHASE_12V SOFTSTART3 FB3 INV3 NC LH3 OUT3_u LL3 OUT3_d OUTGND3 description The TPS5140 is a dc/dc controller that incorporates three synchronous-buck controllers and one nonsynchronous 12-V boost converter on one chip to power ...