TPS22941, TPS22942, TPS22943, TPS22944, TPS22945

www.ti.com

SLVS832C – NOVEMBER 2008 – REVISED NOVEMBER 2009

LOW-INPUT-VOLTAGE CURRENT-LIMITED LOAD SWITCHES

WITH SHUT OFF AND AUTO-RESTART FEATURE

Check for Samples: TPS22941 TPS22942 TPS22943 TPS22944 TPS22945

1

FEATURES

DESCRIPTION

•

Input Voltage Range: 1.62 V to 5.5 V

•

Low ON resistance

The TPS2294x load switches provide protection to

systems and loads in high-current conditions. The

–

devices contain a 400-m

Ω current-limited P-channel

–

MOSFET that can operate over an input voltage

–

range of 1.62 V to 5.5 V. Current is prevented from

flowing when the MOSFET is off. The switch is

–

controlled by an on/off input (ON), which is capable of

•

Minimum Current Limit: 40 mA or 100 mA

interfacing directly with low-voltage control signals.

•

Undervoltage Lockout

The TPS2294x includes thermal shutdown protection

that

prevents

damage

to

the

device

when

a

•

Thermal Shutdown

continuous over-current condition causes excessive

•

Shutdown Current < 1

μA

heating by turning off the switch.

•

Fast Current Limit Response Time

When the switch current reaches the maximum limit,

•

Fault Blanking

the TPS22941/2/3/4/5 operates in a constant-current

•

Auto Restart

mode to prohibit excessive currents from causing

damage. TPS22941/3 has a current limit of 40 mA

•

1.8-V Compatible Control Input Thresholds

and TPS22942/4/5 has a current limit of 100 mA.

•

ESD Performance Tested Per JESD 22

For

the

TPS22941/2/5,

if

the

constant

current

–

4000-V Human-Body Model

condition still persists after 10ms, these parts shut off

(A114-B, Class II)

the switch and pull the fault signal pin (OC) low. The

–

1000-V Charged-Device Model (C101)

TPS22941/2/5, have an auto-restart feature that turns

•

Tiny SC-70 (DCK) Package

the switch on again after 80 ms if the ON pin is still

active. A current limit condition on the TPS22943 and

on the TPS22944 immediately pull the fault signal pin

APPLICATIONS

low

(OC

pin)

and

the

part

remains

in

the

•

Low-Current Sensor Protection

constant-current mode until the switch current falls

•

HDMI Connector Protection

below the current limit.

•

Notebooks

The TPS2294x is available in a SC70-5 (DCK)

•

PDAs

package. It is characterized for operation over the

•

GPS Devices

free-air temperature range of –40°C to 85°C.

•

MP3 Players

•

Peripheral Ports

Table 1. Feature List

MINIMUM CURRENT LIMIT

CURRENT LIMIT

DEVICE

AUTO-RESTART TIME (ms)

ON PIN ACTIVITY

(mA)

BLANKING TIME (ms)

TPS22941

40

10

80

Active LOW

TPS22942

100

10

80

Active LOW

TPS22943

40

0

N/A

Active HIGH

TPS22944

100

0

N/A

Active HIGH

TPS22945

100

10

80

Active HIGH

1

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 © 2008–2009, 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.