TL499A

WIDE-RANGE POWER-SUPPLY CONTROLLERS

SLVS029F – JANUARY 1984 – REVISED MAY 2000

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POST OFFICE BOX 655303

Regulator

description

The TL499A is an integrated circuit designed to provide a wide range of adjustable regulated supply voltages.

The regulated output voltage can be varied from 2.9 V to 30 V by adjusting two external resistors. When the

TL499A is ac-coupled to line power through a step-down transformer, it operates as a series dc voltage regulator

to maintain the regulated output voltage. With the addition of a battery from 1.1 V to 10 V, an inductor, a filter

capacitor, and two resistors, the TL499A operates as a step-up switching regulator during an ac-line failure.

The adjustable regulated output voltage makes the TL499A useful for a wide range of applications. Providing

backup power during an ac-line failure makes the TL499A extremely useful in microprocessor memory

applications.

The TL499AC is characterized for operation from –20

°C to 85°C.

AVAILABLE OPTIONS

TA

PLASTIC DIP

(P)

PLASTIC

SMALL-OUTLINE

(PS)

CHIP FORM

(Y)

–20

°C to 85°C

TL499ACP

TL499ACPS

TL499AY

The PS package is available taped and reeled. Add the suffix R to device

type (e.g., TL499ACPSR). Chip forms are tested at 25

°C.

Copyright

© 2000, 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.

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SERIES IN1

REF

SW REG IN2

SW CURRENT CTRL

OUTPUT

GND (PWR)

SW IN

GND

P OR PS PACKAGE

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