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.