TPS2048ADR.B中文资料德州仪器数据手册PDF规格书

1FEATURES

· 80-mΩ High-Side MOSFET Switch

· 250 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

DESCRIPTION

The TPS2045A through TPS2048A and TPS2055A

through TPS2058A power-distribution switches are

intended for applications where heavy capacitive

loads and short circuits are likely to be encountered.

These devices incorporate 80-mΩ 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

0.5 A.