135-mW -Maximum (5-V Input) High-Side

MOSFET Switch

500 mA Continuous Current

Short-Circuit and Thermal Protection With

Overcurrent Logic Output

Operating Range . . . 2.7 V to 5.5 V

Logic-Level Enable Input

2.5-ms Typical Rise Time

Undervoltage Lockout

10 mA Maximum Standby Supply Current

Bidirectional Switch

Available in 8-pin SOIC and PDIP Packages

Ambient Temperature Range, –40°C to 85°C

2-kV Human-Body-Model, 200-V

Machine-Model ESD Protection

UL Listed – File No. E169910

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-mW N-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.