TPS9104

CELLULAR SUBSCRIBER TERMINAL

POWER SUPPLY/AUDIO SYSTEM

SLVS133A – AUGUST 1996 – REVISED APRIL 1998

1

POST OFFICE BOX 655303

Cellular Handsets

100-mV Dropout

32-

Ω Dynamic Speakers or Piezo Devices

Shutdown, Typical

For Inverted or Doubled Output

Charge Pump

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

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

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

(PT)

CHIP FORM

(Y)

–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.

14 15

GND

EN_B

PB

OFF

ON

VCC

NC

EN

PA

MIC_EN

EN_A

GND

36

35

34

33

32

31

30

29

28

27

26

25

16

1

2

3

4

5

6

7

8

9

10

11

12

GND

VCC

PL

RNGR_OUT+

RNGR_OUT–

RNGR_IN

RNGR_EN

RESET

NC

AREF

VCP

GND_CP

17 18 19 20

47 46 45 44 43

48

42

40 39 38

41

21 22 23 24

37

13

PT PACKAGE

(TOP VIEW)

NC – No internal connection

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.

Copyright

© 1998, Texas Instruments Incorporated