TPS2102, TPS2103

SLVS234A – SEPTEMBER 1999 – REVISED APRIL 2000

1

POST OFFICE BOX 655303

features

With No Reverse Current Flow (No Parasitic

Diodes)

14-

µA Supply Current

0.75-

Device Model, 200-V Machine-Model

ESD Protection

typical applications

description

The TPS2102 and TPS2103 are dual-input, single-output power switches designed to provide uninterrupted

output voltage when transitioning between two independent power supplies. Both devices combine one

n-channel (250 m

Ω) and one p-channel (1.3 Ω) MOSFET with a single output. The p-channel MOSFET (IN2)

is used with auxiliary power supplies that deliver lower current for standby modes. The n-channel MOSFET

(IN1) is used with a main power supply that delivers higher current required for normal operation. Low

on-resistance makes the n-channel the ideal path for higher main supply current when power-supply regulation

and system voltage drops are critical. When using the p-channel MOSFET, quiescent current is reduced to

0.75

µA to decrease the demand on the standby power supply. The MOSFETs in the TPS2102 and TPS2103

do not have the parasitic diodes, typically found in discrete MOSFETs, thereby preventing back-flow current

when the switch is off.

DBV PACKAGE

(TOP VIEW)

GND

IN2

IN1

OUT

EN

GND

IN2

IN1

OUT

EN

DBV PACKAGE

(TOP VIEW)

TPS2102

TPS2103

NC – No internal connection

PCI12xx / PCI14xx

CardBus Controller

PCI Bus

VAUX

3.3 V

VGA

TPS210x

VCC

D3-STAT

1

2

3

4

8

7

6

5

IN2

GND

EN

NC

OUT

OUT

NC

IN1

D PACKAGE

(TOP VIEW)

D PACKAGE

(TOP VIEW)

1

2

3

4

8

7

6

5

IN2

GND

EN

NC

OUT

OUT

NC

IN1

1

2

3

5

4

1

2

3

5

4

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.

Figure 1. Typical Dual-Input Single-Output

Application

TPS2102

IN1

IN2

EN

3.3 V VCC

3.3 V VAUX

D3 or PME Status

Control Signal

Holdup

Capacitor

Controller

(CardBus,

1394,

PCI,

et al.)

3.3 V