Texas Instruments TPS9104IPTR, TPS9104IPT Datasheet

TPS9104

CELLULAR SUBSCRIBER TERMINAL

POWER SUPPLY/AUDIO SYSTEM

SLVS133A – AUGUST 1996 – REVISED APRIL 1998

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

Complete Power-Supply/Audio System For Cellular Handsets

Three Low-Dropout Regulators (LDOs) with 100-mV Dropout

Speaker and Ringer Power Amplifiers Drive 32-Ω Dynamic Speakers or Piezo Devices

Low-Noise Microphone Amplifier

Depop Protection For All Amplifiers

Less Than 1 µA 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

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 high-gain (A

=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

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 V

NC EN PA MIC_EN EN_A GND

36 35 34 33 32 31 30 29 28 27 26 25

1 2 3 4 5 6 7 8 9 10 11 12

GND V

PL RNGR_OUT+ RNGR_OUT–

RNGR_IN

RNGR_EN

RESET

AREF

VCP

GND_CP

17 18 19 20

SPKR_OUT+

47 46 45 44 4348 42

SPKR_ENCLVL

REF

GND

MIC_OUT

MIC_IN–

MIC_IN+

40 39 3841

21 22 23 24

SPKR_IN

SPKR_OUT–

EN_CP

ON_REM

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.

TPS9104 CELLULAR SUBSCRIBER TERMINAL POWER SUPPLY/AUDIO SYSTEM

SLVS133A – AUGUST 1996 – REVISED APRIL 1998

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

functional block diagram

Charge

Pump Driver

1 Ω

LDO

Regulator

1 Ω

LDO

Regulator

1 Ω

LDO

Regulator

Reset

Generator

Voltage

Reference

UVLO

†

and

OTP

‡

_ +

VCP CP GND_CP

EN_CP

VB CB

CA PA

CL PL

RESET

OFF

SPKR_IN

AREF

RNGR_IN MIC_IN+

MIC_IN– MIC_OUT

MIC_EN

REF

EN_A

ON_REM

SPKR_OUT+

SPKR_OUT–

SPKR_EN

GND

RNGR_OUT+

RNGR_OUT–

RNGR_EN

EN_B

†

UVLO - Undervoltage lockout

‡

OTP - Overtemperature protection

TPS9104

CELLULAR SUBSCRIBER TERMINAL

POWER SUPPLY/AUDIO SYSTEM

SLVS133A – AUGUST 1996 – REVISED APRIL 1998

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

TPS9104Y chip information

These chips, when properly assembled, display characteristics similar to the TPS9104. Thermal compression or ultrasonic bonding may be used on the doped aluminum bonding pads. The chips may be mounted with conductive epoxy or a gold-silicon preform.

CHIP THICKNESS: 15 TYPICAL BONDING PADS: 3.3 × 3.3 MINIMUM TJ max = 150°C TOLERANCES ARE ±10%. ALL DIMENSIONS ARE IN MILS.

BONDING PAD ASSIGNMENTS

138

18 16

15 14

123456784710 11 12

36 35 34 33 32 31 29 28 27 26 25

40 42

TPS9104 CELLULAR SUBSCRIBER TERMINAL POWER SUPPLY/AUDIO SYSTEM

SLVS133A – AUGUST 1996 – REVISED APRIL 1998

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

Terminal Functions

TERMINAL

NAME NO.

I/O

DESCRIPTION

GND 1, 15,

25, 36

Ground. GND terminals should be externally connected to ground to ensure proper functionality.

2, 31,

Supply voltage input. VCC terminals are not connected internally and must be externally connected to ensure

proper functionality. PL 3 I Program L. PL provides voltage programming input for regulator L. RNGR_OUT+ 4 O Ringer amplifier noninverting output RNGR_OUT– 5 O Ringer amplifier inverting output RNGR_IN 6 I Ringer amplifier input RNGR_EN 7 I Ringer amplifier enable input; logic low enables the amplifier RESET 8 O Microprocessor reset output NC 9, 17,

20, 30 41, 44

No connection

AREF 10 Analog reference. A 0.1-µF capacitor must be connected from AREF to ground. No other connections are

allowed. VCP 11 Charge pump driver supply voltage GND_CP 12 Charge pump driver ground CP 13 O Charge pump driver output EN_CP 14 I Charge pump driver enable input. Logic low on EN_CP turns on the charge pump. ON_REM 16 I Remote on; logic high enables the part. MIC_OUT 18 O Microphone amplifier output MIC_IN– 19 I Microphone amplifier inverting input MIC_IN+ 21 I Microphone amplifier noninverting input REF 22 O 1.185-V reference output. Decouple with 0.01-µF to 0.1-µF capacitor to ground. VA 23 O Regulator A output voltage CA 24 Regulator A filter capacitor connection EN_A 26 I Regulator A enable input; logic low turns on the regulator. MIC_EN 27 I Microphone amplifier enable input; logic low turns on the microphone amplifier. PA 28 I Program A. PA provides programming input for Regulator A. EN 29 I/O Enable signal input/output; logic low enables the part. ON 32 O On-signal output OFF 33 I Off signal PB 34 I Program B. PB provides programming input for Regulator B. EN_B 35 I Regulator B enable input; logic low turns on the regulator. CB 37 Regulator B filter capacitor connection VB 38 O Regulator B output voltage SPKR_OUT+ 39 O Speaker amplifier noninverting output SPKR_OUT– 42 O Speaker amplifier inverting output SPKR_IN 43 I Speaker amplifier input VL 45 O Regulator L output voltage CL 46 Regulator L filter capacitor connection SPKR_EN 47 I Speaker amplifier enable input; logic low enables the amplifier. ON 48 I On signal; logic low enables the part.

TPS9104

CELLULAR SUBSCRIBER TERMINAL

POWER SUPPLY/AUDIO SYSTEM

SLVS133A – AUGUST 1996 – REVISED APRIL 1998

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

detailed description

voltage reference

The regulators and reset generator utilize an internal 1.185-V band-gap voltage reference. The reference is also buffered and brought out on REF for external use; REF can source a maximum of 2 mA. A 0.01-µF to 0.1-µF capacitor must be connected between REF and ground.

LDO regulators

The TPS 9104 includes three low-dropout regulators, implemented with 1-Ω PMOS series-pass transistors, with quiescent supply currents of 100 µA. Each of the regulators can supply up to 100 mA of continuous output current. The 1-Ω PMOS series-pass transistor achieves the dropout voltage of just 100 mV at the maximum rated output current. Each regulator output voltage can be independently programmed to either 3.3 V or 3 V using its programming control input PL, P A or PB (Px). A logic low on Px sets the output voltage of the regulator to 3.3 V; a logic high sets it to 3 V.

Each LDO contains a current limit circuit. When the current demand on the regulator exceeds the current limit, the output voltage drops in proportion to the excess current. When the excess load current is removed, the output voltage returns to regulation. Exceeding the current limit on VL can disable the TPS9104. If enough current demand is placed on VL, the output voltage drops below the reset threshold voltage causing RESET to go low, effectively unlatching the enable.

VL is intended to be the primary supply voltage for the microprocessor and other system logic functions. V A and VB can be used to power low-noise analog circuits and/or implement system power management. The enable terminals EN_A

and EN_B are utilized to power down circuitry when it is not required. EN_A and EN_B are TTL-compatible inputs with 10-µA active current-source pullups. A logic low enables the respective regulator while a logic high pulls the regulator output voltage to ground and reduces the regulator quiescent current to leakage levels. Both EN_A

and EN_B are not active until RESET is logic high.

Stability of the LDOs is ensured by the addition of compensation terminals CL, CA, and CB, which connect to the output of the regulator through an internal 1-Ω resistor. This compensation scheme allows for capacitors with equivalent series resistance (ESR) of up to 15 Ω, eliminating the need for expensive, low-ESR capacitors.

reset generator

RESET

is a microprocessor reset signal that goes to logic low at power-up, or whenever VL drops below 2.93 V

(2.6 V for 3-V applications), and remains in that state for 250 ms after VL exceeds the RESET

threshold (see Figure 5). The open-drain output has a 30-µA pullup that eliminates the need for an external pullup resistor and still allows it to be connected with other open-drain or open-collector signals. RESET

is valid for supply voltages

as low as 1.5 V.

, OFF, ON, ON_REM and EN functions

The ON

input is intended to be the main enable for the TPS9104 and should be connected to ground through

a push-button switch. Once the switch is pressed, internal logic pulls EN

low. The EN terminal is designed to sink 3.2 mA and can be used as a pulldown to enable other functions on the TPS9104 or other system circuitry . When EN

is pulled low, the TPS9104 checks to make sure the supply voltage is above the UVLO threshold voltage and the die temperature is below 160°C. If both of these conditions are met, the reference circuitry, regulator L, reset generator, and other support circuitry are enabled. When RESET

goes high, the system can

respond with a logic high on OFF

, which latches the TPS9104 on, and the ON push button can then be released.

The TPS9104 is disabled in a similar manner. If the ON

push button is pressed while the TPS9104 is enabled, the ON signal responds with a logic high. Once this logic high is detected, the system can respond with a logic low on OFF

, disabling the TPS9104 and reducing supply currents to 1 µA (see Figure 1).

TPS9104 CELLULAR SUBSCRIBER TERMINAL POWER SUPPLY/AUDIO SYSTEM

SLVS133A – AUGUST 1996 – REVISED APRIL 1998

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

The ON_REM signal can be used in the same manner as ON in enabling or disabling the TPS9104. The signal is provided as a system interface to increase the flexibility of the system. EN

can also be used as an input wired-OR open collector/drain to enable the TPS9104; however, it does not produce a logic signal ON and therefore cannot be used in the disable sequence described above. It is not recommended that EN

be used as

the primary enable signal for the TPS9104.

Enable Sequence Disable Sequence

Must Be Held Low Until System Responds With A High Signal At OFF .

ON Is Pressed To Turn Off The System (Phone).

Once EN

Goes Low, The Status Of The

UVLO And The OTP Are Checked.

If The UVLO And OTP Are Valid, VL And Other Functions Are Enabled.

250 ms

250 ms After VL Rises Above The Reset Threshold Voltage, RESET Goes High.

The System Can Now Respond With A High Signal At OFF.

Once OFF And RESET Are High, The Enable Input Is Latched On.

System Detects The High Signal At ON And Responds With a Low Signal At OFF .

ONENON

RESET

OFF

VA VB

EN_A And EN_B Are both Active And Low.

Figure 1. Recommended Enable and Disable Sequence

speaker/ringer power amplifiers

The TPS9104 includes two differential-output power amplifiers capable of driving dynamic or piezoelectric speakers. Both amplifiers have enable inputs to reduce supply current to leakage levels when the amplifiers are not in use. Depopping circuitry prevents objectionable noise when the enable inputs are cycled on or off. Each amplifier requires only two gain-setting resistors and a capacitor for dc blocking (see Figure 46). RNGR_EN

and SPKR_EN inputs are disabled when RESET is asserted. Both the SPKR_EN and the

RNGR_EN

have internal 10-µA pullups.

microphone amplifier

This is a high-gain amplifier capable of driving a 10-kΩ load at 3 V peak-to-peak output. MIC_EN

input is

disabled when RESET

is asserted. The microphone amplifier has an enable input that reduces supply current

to leakage levels when disabled. Added depopping circuitry prevents objectionable noise when the enable input

TPS9104

CELLULAR SUBSCRIBER TERMINAL

POWER SUPPLY/AUDIO SYSTEM

SLVS133A – AUGUST 1996 – REVISED APRIL 1998

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

is cycled on or off. The microphone amplifier needs only two resistors to set the gain, and one capacitor for dc blocking (see Figure 47). Regulator A is the analog supply for the microphone amplifier, and EN_A

must be

asserted for correct operation.

undervoltage lockout

Undervoltage lockout (UVLO) prevents operation of the functions in the TPS9104 until the supply voltage exceeds the threshold voltage, eliminating abnormal power-up conditions internally and externally, and providing an orderly turn-on.

overtemperature shutdown

If the die temperature exceeds 160°C, the thermal protection circuit shuts off the TPS9104. When the die temperature drops below 150°C, the device can be restarted with the ON

input.

charge pump driver

An unregulated inverting or doubler charge pump is implemented (see Figure 44) by connecting a network of two capacitors and two diodes to CP. In the inverting configuration, the charge pump can power an LCD or provide gate bias for a GaAs power amplifier. A 5-V supply for flash-memory programming or powering the subscriber identity module (SIM) European applications can be achieved using the doubler configuration and an external LDO. A logic-low input to the charge-pump enable, EN_CP

, turns on the oscillator and driver; a logic

high turns them off. EN_CP

input is disabled when RESET is asserted. The EN_CP has a 10-µA internal pullup.

DISSIPATION RATING TABLE 1 – Free-Air Temperature

PACKAGE

TA ≤ 25°C

POWER RATING

DERATING FACTOR

ABOVE TA = 25°C

TA = 70°C

POWER RATING

TA = 85°C

POWER RATING

PT 1350 mW 10.8 mW/°C 864 mW 702 mW

DISSIPATION RATING TABLE 2 – Case T emperature

PACKAGE

TC ≤ 25°C

POWER RATING

DERATING FACTOR

ABOVE TC = 25°C

TC = 70°C

POWER RATING

TC= 85°C

POWER RATING

PT 6579 mW 52.6 mW/°C 4212 mW 3423 mW

TPS9104 CELLULAR SUBSCRIBER TERMINAL POWER SUPPLY/AUDIO SYSTEM

SLVS133A – AUGUST 1996 – REVISED APRIL 1998

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

400

200

1200

25 50 75 100

800

600

1000

MAXIMUM CONTINUOUS POWER DISSIPATION

FREE-AIR TEMPERATURE

1400

125 150

TA – Free-Air Temperature – °C

θJA

= 93°C/W

– Maximum Continuous Power Dissipation – mW P

2000

1000

6000

25 50 75 100

– Maximum Continuous Power Dissipation – mW

4000

3000

5000

MAXIMUM CONTINUOUS POWER DISSIPATION

CASE TEMPERATURE

7000

125 150

TA – Case Temperature – ° C

θJC

= 19°C/W

Figure 2 Figure 3

absolute maximum ratings over operating free-air temperature range (unless otherwise noted)

†‡

Supply voltage range, V

, 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_REM, EN_CP –0.3 V to V

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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, T

–40°C to 85°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Storage temperature range, T

stg

–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.

TPS9104

CELLULAR SUBSCRIBER TERMINAL

POWER SUPPLY/AUDIO SYSTEM

SLVS133A – AUGUST 1996 – REVISED APRIL 1998

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

recommended operating conditions

MIN NOM MAX UNIT

Supply voltage, VCC, VCP 3 10 V Input voltage, OFF, MIC_EN, SPKR_EN, RNGR_EN 0 5 V Input voltage at PL, PA, PB, EN, EN_A, EN_B, ON, ON_REM, EN_CP 0 V

V Reference output current 0 2 mA Continuous regulator output current 0 100 mA Operating free-air temperature –40 85 °C

electrical characteristics over recommended operating free-air temperature range, V

= VCP = 4 V, Px = 0 V, I

O(Vx)

= 35 mA, OFF = VL, ON open, ON_REM = 0 V, Cx = 10 µF

(unless otherwise noted)

voltage reference (REF)

PARAMETER TEST CONDITIONS

†

MIN TYP MAX UNIT

TA = 25°C, IO = 0 1.185 V

Output voltage

4 V ≤ VCC ≤ 10 V, 0 ≤ IO≤ 2 mA 1.161 1.209 V

LDO regulators

PARAMETER TEST CONDITIONS

†

MIN TYP MAX UNIT

TA = 25°C 3.25 3.3 3.35 V 0 ≤ I

O(Vx)

≤ 100 mA, 3.5 V ≤ VCC ≤ 10 V 3.2 3.4 V

Output voltage at VA, VB, VL (Vx)

Px = VCC,

TA = 25°C 2.95 3 3.05 V

Px = V

CC,

3.2 V ≤ VCC ≤ 10 V

0 ≤ I

O(Vx)

≤ 100 mA,

2.9 3.10 V

Dropout voltage I

O(Vx)

= 100 mA, VCC = 3.2 V 100 200 mV

Load regulation I

O(Vx)

= 0 mA to 100 mA 30 mV

Line regulation I

O(Vx)

= 100 mA, VCC = 3.5 V to 10 V 10 mV Ripple rejection f = 120 Hz 60 dB Quiescent current (each regulator) 100 µA

charge pump driver

PARAMETER TEST CONDITIONS MIN TYP MAX UNIT

Frequency 50 100 150 kHz Duty cycle 50% Output resistance 15 30 Ω

†

Pulse-testing techniques are used to maintain virtual junction temperature as close as possible to ambient temperature; thermal effect must be taken into account separately.

TPS9104 CELLULAR SUBSCRIBER TERMINAL POWER SUPPLY/AUDIO SYSTEM

SLVS133A – AUGUST 1996 – REVISED APRIL 1998

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

electrical characteristics over recommended operating free-air temperature range, V

= VCP = 4 V, Px = 0 V, I

O(Vx)

= 35 mA, OFF = VL, ON open, ON_REM = 0 V, Cx = 10 µF

(unless otherwise noted) (continued)

speaker amplifier/ringer amplifier

PARAMETER TEST CONDITIONS

†

MIN TYP MAX UNIT

Output voltage swing Single-ended, RL = 32 Ω 1.6 2 V Output offset voltage Av = 1 V/V 15 30 mV

Total harmonic distortion (THD)

I(PP)

= 1 V,

Av = 1 V/V,

f = 1 kHz, RL = 32 Ω

0.5% 1%

Gain bandwidth product (GBW) Av = 10 V/V 4 20 kHz Input noise 100 Hz ≤ BW ≤ 100 kHz 200 µVrms Quiescent current (each amplifier) 2 mA

PL = V

1.221

Reference voltage, AREF

PL = 0 V 1.345

microphone amplifier

PARAMETER TEST CONDITIONS

†

MIN TYP MAX UNIT

Common mode input voltage range 1 VA –1 V Input bias current Both inputs = VA/2 –1 1 µA Output voltage swing 10 kΩ load, VA = 3.3 V 2.7 3 V Output offset voltage Av = 1 V/V 6 mV

Total harmonic distortion (THD)

f = 1 kHz, AV = 100 V/V , Output voltage swing = 1 V , V

O(PP)

0.5% 1%

Power-supply rejection ratio (PSRR) Av = 100 V/V 100 dB Common-mode rejection ratio (CMRR) Av = 100 V/V 80 dB Gain bandwidth product (GBW) Av = 100 V/V 4 kHz Input noise 100 Hz ≤ BW ≤ 100 kHz 10 µVrms Quiescent current 180 µA

RESET

PARAMETER TEST CONDITIONS

†

MIN TYP MAX UNIT

Input threshold voltage VL voltage decreasing 2.871 2.93 2.989 V Input threshold voltage VL voltage decreasing, PL = V

2.548 2.6 2.652 V Timeout delay at RESET See Figure 5 125 250 375 ms Low-level output voltage IO = 1 mA, VCC = 1.5 V 0.4 V High-level output current VO = 2.4 V –40 –20 µA Low-level output current VO = 0.4 V 3.2 mA Hysteresis 40 mV

logic inputs at EN_A, EN_B, SPKR_EN, RNGR_EN, MIC_EN, EN_CP

PARAMETER TEST CONDITIONS MIN TYP MAX UNIT

High-level input voltage 2 V Low-level input voltage 0.8 V Input current –20 –10 1 µA

†

Pulse-testing techniques are used to maintain virtual junction temperature as close as possible to ambient temperature; thermal effect must be taken into account separately.

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