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TL499A

WIDE-RANGE POWER-SUPPLY CONTROLLERS

SLVS029G – JANUARY 1984 – REVISED SEPTEMBER 2001

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

Internal Series-Pass and Step-Up Switching

Regulator

Output Adjustable From 2.9 V to 30 V

1-V to 10-V Input for Switching Regulator

4.5-V to 32-V Input for Series Regulator

Externally Controlled Switching Current

No External Rectifier Required

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

PLASTIC DIP

(P)

PLASTIC

SMALL-OUTLINE

(PS)

–20°C to 85°C TL499ACP TL499ACPS

The PS package is available taped and reeled. Add the

suffix R to device type (e.g., TL499ACPSR).

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.

SERIES IN1

REF

SW REG IN2

SW CURRENT CTRL

OUTPUT

GND (PWR)

SW IN

GND

P OR PS PACKAGE

(TOP VIEW)

Summary of content (13 pages)

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TL499A WIDE-RANGE POWER-SUPPLY CONTROLLERS SLVS029G – JANUARY 1984 – REVISED SEPTEMBER 2001 D D D D D D P OR PS PACKAGE (TOP VIEW) Internal Series-Pass and Step-Up Switching Regulator Output Adjustable From 2.9 V to 30 V 1-V to 10-V Input for Switching Regulator 4.
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TL499A WIDE-RANGE POWER-SUPPLY CONTROLLERS SLVS029G – JANUARY 1984 – REVISED SEPTEMBER 2001 functional block diagram SW IN 6 3 Blocking Diode 8 OUTPUT SW REG IN2 Startup Voltage Sense SW REG Control 7 GND (PWR) 4 SW CURRENT CTRL Current Sense – + + 2 REF – + 1 SERIES IN1 + Startup 5 GND absolute maximum ratings over operating free-air temperature range (unless otherwise noted)† Output voltage, VO (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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TL499A WIDE-RANGE POWER-SUPPLY CONTROLLERS SLVS029G – JANUARY 1984 – REVISED SEPTEMBER 2001 recommended operating conditions MIN NOM MAX UNIT Output voltage, VO 2.9 30 V Input voltage, VI1 (SERIES IN1) 4.5 32 V Input voltage, VI2 (SW REG IN2) 1.1 10 V Output-to-input differential voltage, switching regulator, VO – VI2 (see Note 4) 1.2 28.
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TL499A WIDE-RANGE POWER-SUPPLY CONTROLLERS SLVS029G – JANUARY 1984 – REVISED SEPTEMBER 2001 APPLICATION INFORMATION L = 50 µH TL499A 1 1 SERIES IN1 2 3 3 SW REG IN2 4 SERIES IN1 OUTPUT GND (PWR) REF SW REG IN2 SW CURRENT CTRL SW IN GND 8 8 OUTPUT 7 6 + 5 CP = 0.01 µF CF = 470 µF RE1 RCL = 500 Ω RE2 = 4.7 kΩ Figure 1. TL499A Basic Configuration Table 1.
PAGE 5
TL499A WIDE-RANGE POWER-SUPPLY CONTROLLERS SLVS029G – JANUARY 1984 – REVISED SEPTEMBER 2001 APPLICATION INFORMATION Table 2. Maximum Output Current vs Input and Output Voltages for Step-Up Switching Regulator With RCL = 200 Ω OUTPUT VOLTAGE (V) SWITCHING REGULATOR INPUT VOLTAGE (SW REG IN2) (V) 1.1 1.2 1.3 1.5 1.7 2 2.
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TL499A WIDE-RANGE POWER-SUPPLY CONTROLLERS SLVS029G – JANUARY 1984 – REVISED SEPTEMBER 2001 APPLICATION INFORMATION Table 4. Maximum Output Current vs Input and Output Voltages for Step-Up Switching Regulator With RCL = 510 Ω OUTPUT VOLTAGE (V) SWITCHING REGULATOR INPUT VOLTAGE (SW REG IN2) (V) 1.1 1.2 1.3 1.5 1.7 2 2.
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PACKAGE OPTION ADDENDUM www.ti.
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PACKAGE OPTION ADDENDUM www.ti.com 10-Jun-2014 continues to take reasonable steps to provide representative and accurate information but may not have conducted destructive testing or chemical analysis on incoming materials and chemicals. TI and TI suppliers consider certain information to be proprietary, and thus CAS numbers and other limited information may not be available for release.
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PACKAGE MATERIALS INFORMATION www.ti.com 14-Jul-2012 TAPE AND REEL INFORMATION *All dimensions are nominal Device TL499ACPSR Package Package Pins Type Drawing SO PS 8 SPQ Reel Reel A0 Diameter Width (mm) (mm) W1 (mm) 2000 330.0 16.4 Pack Materials-Page 1 8.2 B0 (mm) K0 (mm) P1 (mm) W Pin1 (mm) Quadrant 6.6 2.5 12.0 16.
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PACKAGE MATERIALS INFORMATION www.ti.com 14-Jul-2012 *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) TL499ACPSR SO PS 8 2000 367.0 367.0 38.
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IMPORTANT NOTICE Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, enhancements, improvements and other changes to its semiconductor products and services per JESD46, latest issue, and to discontinue any product or service per JESD48, latest issue. Buyers should obtain the latest relevant information before placing orders and should verify that such information is current and complete.