1 Features

1• 2.7 V to 18 V Operating Voltage, 20 V (Maximum)

• 42-mΩ RON (Typical)

• 0.6 A to 5.3 A Adjustable Current Limit (±8%)

• IMON Current Indicator Output (±8%)

• 200-μA Operating IQ (Typical)

• 15-μA Disabled IQ (Typical)

• ±2% Overvoltage, Undervoltage Thresholds

• Reverse Current Blocking

• 1-μs Reverse Voltage Shutoff

• Programmable dVo/dt Control

• Power Good and Fault Outputs

• Two Overcurrent Fault Response Options

– TPS25942: I(LIMIT) with Thermal Shutdown

– TPS25944: 4 ms Fault Timer then Shutoff

• –40°C to +125°C Junction Temperature Range

• UL 2367 Recognized

– File No. 169910

– RILIM ≥ 20 kΩ (4.81 A Maximum)

• UL60950 Safe during Single Point Failure

– Open-Short ILIM detection

2 Applications

• Power Path Management

• Redundant Power Supply Systems

• PCIe cards, NICs and RAID Systems

• USB Power Banks, Power MUXes

• SSDs and HDDs

• Tablets and Notebooks

• Adapter Power Devices

• PLCs, SS Relays and Fan Control

3 Description

The TPS25942, TPS25944 eFuse Power MUX is a

compact, feature rich power management device with

a full suite of protection functions. The wide operating

range allows control of many popular DC bus

voltages. Integrated back-to-back FETs provide

bidirectional current control making the device well

suited for power muxing and systems with multiple

power sources.

Load, source and device protection are provided with

many programmable features. Thresholds for

undervoltage, overvoltage, overcurrent, dVo/dt ramp

rate, power good, and in-rush current protection are

all programmable to suit specific system

requirements. For system status monitoring and

downstream load control, the device provides

PGOOD, FLT and precise current monitor output.

The TPS25942, TPS25944 monitor V(IN) and V(OUT) to

provide true reverse blocking from output when V(IN) <

(V(OUT) – 10 mV). The device can be configured to

assign Main/Auxiliary supply priority using the FLT

and DMODE pins.