TPS9111

D Complete Power Supply for Cellular Handsets D Three Low-Dropout Regulators (LDOs) with 100-mV Dropout D Less Than 1 µA Supply Current in Shutdown Typ D 250-ms Microprocessor Reset Output D 10-mA Charge-Pump Driver Configurable For Inverted or Doubled Output D Separate Enables for LDOs and Charge Pump D 1.185-V Reference D 28-Pin TSSOP Package description TPS9111 CELLULAR SUBSCRIBER TERMINAL POWER SUPPLY SLVS134A – NOVEMBER 1996 – REVISED APRIL 1998 PW PACKAGE (TOP VIEW) RESET VCP GND_CP CP EN_CP GND EN ON VA CA PA GND EN_A VCC 1 2 3 4 5 6 7 8 9 10 11 12 13 14 28 VCC 27 PL 26 GND 25 ON 24 CL 23 VL 22 REF 21 OFF 20 VB 19 CB 18 ON_REM 17 GND 16 EN_B 15 PB The TPS9111 incorporates a complete power supply system for a cellular subscriber terminal that uses battery packs with three or four NiMH/NiCd cells or a single lithium-ion cell. The device includes three low-dropout linear regulators rated for 3.3 V or 3 V at 100 mA each, a charge-pump driver, and logic that includes a 250-ms reset, on/off control, and processor interface. Regulators A and B and the charge-pump driver are disabled until regulator L (logic regulator) reaches the rated voltage and RESET is logic high. Regulators A and B and the charge-pump driver also have separate enables allowing circuitry to be powered up or down as necessary to conserve battery power. The TPS9111 operates over a free-air temperature range of –40°C to 85°C and is supplied in a 28-pin TSSOP package. AVAILABLE OPTIONS TA PACKAGED DE...