TPS2051AD.A中文资料德州仪器数据手册PDF规格书

80-mW High-Side MOSFET Switch

500 mA Continuous Current Per Channel

Independent Thermal and Short-Circuit

Protection With Overcurrent Logic Output

Operating Range . . . 2.7 V to 5.5 V

CMOS- and TTL-Compatible Enable Inputs

2.5-ms Typical Rise Time

Undervoltage Lockout

10 mA Maximum Standby Supply Current

for Single and Dual (20 mA for Triple and

Quad)

Bidirectional Switch

Ambient Temperature Range, 0°C to 85°C

ESD Protection

UL Listed – File No. E169910

description

The TPS2041A through TPS2044A and

TPS2051A through TPS2054A power-distribution

switches are intended for applications where

heavy capacitive loads and short circuits are likely to be encountered. These devices incorporate 80-mW

N-channel MOSFET high-side power switches for power-distribution systems that require multiple power

switches in a single package. Each switch is controlled by an independent logic enable input. Gate drive is

provided by an internal charge pump designed to control 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, these devices limit the output

current to a safe level by switching into a constant-current mode, pulling the overcurrent (OCx) 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 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. These power-distribution switches are designed to current limit

at 0.9 A.