1

FEATURES

DESCRIPTION

APPLICATIONS

TYPICAL APPLICATION CIRCUIT

2

3

4

5

1

9

8

7

6

10

TPS51103DRC

VCLK

GND

VRTC3

EN5

EN3

V5IN

VREG5

VIN

VREG3

V3IN

C2

10 mF

C1

10 mF

C0

10 mF

5V_IN

5 V/100 mA

V

IN

(4.5 V to 28 V

3.3 V/100 mA

3.3V_IN

C3

1 mF

C1

A1

AC1

AC2

A2

C2

C7

0.1 mF

C6

0.1 mF

C4

0.1 mF

C5

0.1 mF

C8

1 mF

5V_IN

3.3 V/5 mA

EN5

EN3

UDG-08017

V15

TPS51103

INTEGRATED LDO WITH SWITCHOVER CIRCUIT FOR NOTEBOOK COMPUTERS

• Wide Input Voltage Range: 4.5 V to 28 V

• 5-V/3.3-V, 100-mA, LDO Output

The TPS51103 integrates three LDOs. The 5-V and

3.3-V LDOs are both rated at 100 mA and also

• Glitch Free Switch Over Circuit

include a glitch-free switch-over feature allowing for

• Always-On 3.3-V, 5-mA LDO Output for RTC

optimized battery life. An additional 3.3-V LDO is

• 250 kHz Clock Output for Charge Pump

designed to provide an always on power output for

the real time clock (RTC). The TPS51103 integrates

• Thermal Shutdown (Non-latch)

a clock output to use with an external charge pump.

• 10Ld QFN (DRC) Package

The TPS51103 offers an innovative solution for

optimizing the complex and multiple power rails

typically

found

in

a

Notebook

Computer.

The

• Notebook Computers

TPS51103 is available in the 10-pin QFN package

and is specified from –40°C to 85°C.

• Mobile Digital Consumer Products

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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.

PRODUCTION DATA information is current as of publication date.

Copyright © 2008, Texas Instruments Incorporated

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.