TPS9104 Datasheet, PDF (1/33 Pages) Texas Instruments – CELLULAR SUBSCRIBER TERMINAL POWER SUPPLY/AUDIO SYSTEM

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)
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
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 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, and the amplifiers have separate enables allowing circuitry to be powered up or down
as necessary to conserve battery power.
Each of the amplifiers 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 Ω or into a 90-nF piezoelectric speaker. The microphone amplifier is a low-noise
high-gain (A_V=100) circuit capable of supplying 3 V peak-to-peak into a 10-kΩ 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.
AVAILABLE OPTIONS
PACKAGED DEVICE
CHIP FORM
TA
THIN QFP
(Y)
(PT)
– 40°C to 85°C
TPS9104IPT
TPS9104Y
The PT package is available taped and reeled. Add R suffix to the device
type when ordering (e.g. TPS9104IPTR).
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
• POST OFFICE BOX 655303 DALLAS, TEXAS 75265
Copyright © 1998, Texas Instruments Incorporated
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