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TPS2051 Datasheet Preview

TPS2051 Datasheet

POWER-DISTRIBUTION SWITCHES

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TPS2041, TPS2051
POWER-DISTRIBUTION SWITCHES
D 135-m-Maximum (5-V Input) High-Side
MOSFET Switch
D 500 mA Continuous Current
D Short-Circuit and Thermal Protection With
Overcurrent Logic Output
D Operating Range . . . 2.7 V to 5.5 V
D Logic-Level Enable Input
D 2.5-ms Typical Rise Time
D Undervoltage Lockout
D 10 µA Maximum Standby Supply Current
D Bidirectional Switch
D Available in 8-pin SOIC and PDIP Packages
D Ambient Temperature Range, –40°C to 85°C
D 2-kV Human-Body-Model, 200-V
Machine-Model ESD Protection
D UL Listed – File No. E169910
SLVS172A –AUGUST 1998 – REVISED APRIL 1999
TPS2041
D OR P PACKAGE
(TOP VIEW)
GND
IN
IN
EN
1
2
3
4
8 OUT
7 OUT
6 OUT
5 OC
TPS2051
D OR P PACKAGE
(TOP VIEW)
GND
IN
IN
EN
1
2
3
4
8 OUT
7 OUT
6 OUT
5 OC
description
The TPS2041 and TPS2051 power distribution switches are intended for applications where heavy capacitive
loads and short circuits are likely to be encountered. The TPS2041 and the TPS2051 are 135-mN-channel
MOSFET high-side power switches. Each switch is controlled by a logic enable compatible with 5-V and 3-V
logic. Gate drive is provided by an internal charge pump that controls the power-switch rise times and fall times
to minimize current surges during switching. The charge pump requires no external components and allows
operation from supplies as low as 2.7 V.
When the output load exceeds the current-limit threshold or a short is present, the TPS2041 and TPS2051 limit
the output current to a safe level by switching into a constant-current mode, pulling the overcurrent (OC) logic
output low. When continuous heavy overloads and short circuits increase the power dissipation in the switch,
causing the junction temperature to rise, a thermal protection circuit shuts off the switch in overcurrent to prevent
damage. Recovery from a thermal shutdown is automatic once the device has cooled sufficiently. Internal
circuitry ensures the switch remains off until valid input voltage is present.
The TPS2041 and TPS2051 are designed to limit at 0.9-A load. These power distribution switches are available
in 8-pin small-outline integrated circuit (SOIC) and 8-pin plastic dual-in-line packages (PDIP) and operate over
an ambient temperature range of –40°C to 85°C.
AVAILABLE OPTIONS
TA
ENABLE
RECOMMENDED
MAXIMUM CONTINUOUS
LOAD CURRENT
(A)
TYPICAL SHORT-CIRCUIT
CURRENT LIMIT AT 25°C
(A)
PACKAGED DEVICES
SOIC
(D)†
PDIP
(P)
–40°C to 85°C Active low
0.5
0.9 TPS2041D
–40°C to 85°C Active high
0.5
0.9 TPS2051D
The D package is available taped and reeled. Add an R suffix to device type (e.g., TPS2041DR)
TPS2041P
TPS2051P
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.
This document contains information on products in more than one phase
of development. The status of each device is indicated on the page(s)
specifying its electrical characteristics.
Copyright © 1999, Texas Instruments Incorporated
POST OFFICE BOX 655303 DALLAS, TEXAS 75265
1




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TPS2051 Datasheet Preview

TPS2051 Datasheet

POWER-DISTRIBUTION SWITCHES

No Preview Available !

TPS2041, TPS2051
POWER-DISTRIBUTION SWITCHES
SLVS172A –AUGUST 1998 – REVISED APRIL 1999
TPS2041 functional block diagram
Power Switch
IN
Charge
Pump
EN
Driver
CS
Current
Limit
UVLO
GND
Thermal
Sense
†Current Sense
NAME
EN
EN
GND
IN
OC
OUT
TERMINAL
NO.
D OR P
TPS2041 TPS2051
4–
–4
11
2, 3 2, 3
55
6, 7, 8
6, 7, 8
Terminal Functions
I/O DESCRIPTION
I Enable input. Logic low turns on power switch.
I Enable input. Logic high turns on power switch.
I Ground
I Input voltage
O Over current. Logic output active low
O Power-switch output
OUT
OC
2 POST OFFICE BOX 655303 DALLAS, TEXAS 75265


Part Number TPS2051
Description POWER-DISTRIBUTION SWITCHES
Maker etcTI
Total Page 25 Pages
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