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 ...