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.