TPS9104

Features:

·Complete Power-Supply/Audio System For Cellular Handsets
·Three Low-Dropout Regulators (LDOs) with 100-mV Dropout
· Speaker and Ringer Power Amplifiers Drive 32-W Dynamic Speakers or Piezo Devices
· Low-Noise Microphone Amplifier
· Depop Protection For All Amplifiers
· Less Than 1 mA Supply Current in Shutdown, Typical
·250-ms Microprocessor Reset Output
·10-mA Charge-Pump Driver Configurable For Inverted or Doubled Output
· Separate Enables for LDOs, Amplifiers, and Charge Pump
·1.185-V Reference Capable of Driving 2 mA
·48-Pin TQFP Package


Pinout




Specifications

Supply voltage range, VCC, VCP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.3 V to 12 V
Input voltage range at OFF, MIC_EN, SPKR_EN, RNGR_EN, SPKR_IN,
RNGR_IN, MIC_IN+, MIC_IN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.3 V to 7 V
Input voltage range at PL, PA, PB, EN, EN_A, EN_B,
ON, ON_REM, EN_CP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.3 V to VCC
Continuous total power dissipation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . See dissipation rating table
Peak output current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Internally limited
Output current range at SPKR_OUT+, SPKR_OUT,
RNGR_OUT+, RNGR_OUT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100 mA to 100 mA
Power dissipation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . See dissipation rating table
Operating free-air temperature range, TA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40°C to 85°C
Storage temperature range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65°C to 150°C
Lead Temperature 1,6 mm (1/16 inch) from case for 10 seconds . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 260°C

† Stresses beyond those listed under "absolute maximum ratings" may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under "recommended operating conditions" is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.

‡ All voltages are with respect to GND.


Description

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 TPS9104 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 amplifier, 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, the charge-pump driver of TPS9104 , and the amplifiers have separate enables allowing circuitry to be powered up or down as necessary to conserve battery power.

Each of the amplifiers TPS9104 has a depop circuit to prevent objectionable noise when the IC is powered up or when the amplifiers are enabled. Both the speaker amplifier and the ringer amplifier are designed to supply 2 V peak-to-peak into 32 W or into a 90-nF piezoelectric speaker. The microphone amplifier TPS9104 is a low-noise high-gain (AV=100) circuit capable of supplying 3 V peak-to-peak into a 10-kW load.

The TPS9104 operates over a free-air temperature range of 40°C to 85°C and is supplied in a 48-pin TQFP package.