TL5002

PULSEWIDTHMODULATION CONTROL CIRCUIT

SLVS304A − SEPTEMBER 2000 − REVISED AUGUST 2002

1

POST OFFICE BOX 655303

• DALLAS, TEXAS 75265

D Complete PWM Power Control

D 3.6-V to 40-V Operation

D Internal Undervoltage-Lockout Circuit

D Oscillator Frequency...20 kHz to 500 kHz

D Variable Dead Time Provides Control Over

Total Range

D Ideal Controller for DDR Memory

Application

D Uncommitted Error Amplifier Inputs

description

The TL5002 incorporates on a single monolithic chip all the functions required for a pulse-width-modulation

(PWM) control circuit. Designed primarily for power-supply control, the TL5002 contains an error amplifier, a

regulator, an oscillator, a PWM comparator with a dead-time-control input, undervoltage lockout (UVLO), and

an open-collector output transistor.

The error-amplifier input common-mode voltage ranges from 0.9 V to 1.5 V. Dead-time control (DTC) can be

set to provide 0% to 100% dead time by connecting an external resistor between DTC and GND. The oscillator

frequency is set by terminating RT with an external resistor to GND. During low VCC conditions, the UVLO circuit

turns the output off until VCC recovers to its normal operating range.

The TL5002 is characterized for operation from − 40

°C to 85°C.

AVAILABLE OPTIONS

TA

SMALL OUTLINE

(D)

−20

°C to 85°C

TL5002CD

−40

°C to 85°C

TL5002ID

The D package is available taped and reeled. Add the suffix R

to the device type (e.g., TL5002CDR).

functional block diagram

GND

8

OUT

COMP

INV

3

4

−

+

DTC

RT

6

7

PWM/DTC

Comparator

OSC

Amplifier

Error

UVLO

VCC

2

1

Reference

Voltage

IDT

2.5 V

5

NI

Copyright

 2002, Texas Instruments Incorporated

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.

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.

1

2

3

4

8

7

6

5

OUT

VCC

COMP

INV

GND

RT

DTC

NI

D PACKAGE

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