D Complete Power-Supply/Audio System For
Cellular Handsets
D Three Low-Dropout Regulators (LDOs) with
100-mV Dropout
D S...
D Complete Power-Supply/Audio System For
Cellular Handsets
D Three Low-Dropout
Regulators (LDOs) with
100-mV Dropout
D Speaker and Ringer Power Amplifiers Drive
32-Ω Dynamic Speakers or Piezo Devices
D Low-Noise Microphone Amplifier D Depop Protection For All Amplifiers D Less Than 1 µA Supply Current in
Shutdown, Typical
D 250-ms Microprocessor Reset Output D 10-mA Charge-Pump Driver Configurable
For Inverted or Doubled Output
D Separate Enables for LDOs, Amplifiers, and
Charge Pump
D 1.185-V Reference Capable of Driving 2 mA D 48-Pin TQFP Package
TPS9104 CELLULAR SUBSCRIBER TERMINAL
POWER SUPPLY/AUDIO SYSTEM
SLVS133A – AUGUST 1996 – REVISED APRIL 1998
PT PACKAGE (TOP VIEW)
ON SPKR_EN CL VL NC SPKR_IN SPKR_OUT– NC VCC SPKR_OUT+ VB CB
GND VCC
PL RNGR_OUT+ RNGR_OUT–
RNGR_IN RNGR_EN
RESET NC
AREF VCP
GND_CP
48 47 46 45 44 43 42 41 40 39 38 37
1 36 2 35 3 34 4 33 5 32 6 31 7 30 8 29 9 28 10 27 11 26 12 25
13 14 15 16 17 18 19 20 21 22 23 24
GND EN_B PB OFF ON VCC NC EN PA MIC_EN EN_A GND
CP EN_CP
GND ON_REM
NC MIC_OUT
MIC_IN– NC
MIC_IN+ REF VA CA
description
NC – No internal connection
The TPS9104 incorporates a complete power supply and audio power 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, two power amplifiers for a speaker and a ringer, a low-noise microphone amplifie...