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5V eFuse with Precision Adjustable Current Limit and Over-Voltage Clamp
SGM40642 SGM40642.pdf

No.10935

FEATURES

● 2.5V to 6.5V Operation

● 55mΩ Internal Switch (High-side MOSFET)

● Up to 2.5A Continuous Load Current

● Up to 20V Input Over-Voltage Tolerance

● Output Shutoff at 7.6V Input Over-Voltage

● 100ns Over-Voltage Lockout (OVLO) Response

● 3.5μs Short Circuit Response

● Reverse Current Blocking while Disabled

● Built-In Soft-Start

● Pin-to-Pin Compatible with SGM2553

● -40℃ to +125℃ Operating Temperature Range

● Available in a Green TDFN-2×2-6AL Package

DESCRIPTION

The SGM40642 is a smart low voltage load switch with a full suite of protective features that can protect the source, device, and the load against a variety of fault conditions. This eFuse device is suitable for 2.5V to 5V loads and provides accurate and adjustable current limiting (170mA to 2.9A) and over-voltage clamping (5.45V). It can deliver 2.5A continues current to the load and its input tolerates up to 20V over-voltage. In over-voltage conditions, the internal switch is turned off to keep the load disconnected.

If the source voltage is high but still near 5V, the output will be clamped to 5.45V to protect the load. If the VIN voltage exceeds 7.6V, the load will be disconnected to prevent damage.

The SGM40642 has an internal 55mΩ power switch with current limit capability. This limit is programmable with a single external resistor (RILIM). A persistent overload condition usually results in thermal shutdown and may cause cyclic ON and OFF periods to protect the device.

APPLICATION CIRCUIT
PIN CONFIGUTION
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