TPS2042D.A中文资料德州仪器数据手册PDF规格书

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

MOSFET Switch

500 mA Continuous Current per Channel

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 TPS2042 and TPS2052 dual power distribution switches are intended for applications where heavy

capacitive loads and short circuits are likely to be encountered. The TPS2042 and the TPS2052 incorporate

in single packages two 135-mW N-channel MOSFET high-side power switches for power distribution systems

that require multiple power switches. Each switch is controlled by a logic enable that is compatible with 5-V logic

and 3-V logic. 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, the TPS2042 and TPS2052 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.

The TPS2042 and TPS2052 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.