SG Micro Corp

SGM2551A Low Ron, High Precision, Adjustable Power Distribution Switch

SGMICRO has recently introduced a power distribution switch with internal resistance as low as 90mΩ: SGM2551A. It is intended for applications where precision current limiting is required or heavy capacitive loads and short circuits are encountered. SGM2551A can provide up to1.5A of continuous load current and offers a programmable current limit threshold between 100mA and 1.7A via an external resistor. The power switch rise and fall times are controlled to minimize current surges during turn on/off.

The SGM2551A limits the output current to a safe level by using a constant-current mode when the output load exceeds the current limit threshold. An internal reverse-voltage comparator disables the power switch when the output voltage is driven higher than the input to protect devices on the input side of the switch.

SGM2551A is available in the Green TDFN-2×2-6L and SOT-23-5 packages. It is rated over the -40°C to +85°C temperature range.

Ordering Information:

For samples, please contact SGMICRO’s local offices or distributors, or log into and leave a message.

SGM2551A is in mass production and the typical lead time is 6-8 weeks.



IQ (μA)

Limit Current (mA)

Soft-Start Up



2.5 ~ 5.5

< 76

130 ~ 1700



© Copyright 2007-2018 SG Micro Corp. All rights reserved. Beijing ICP Recordal No.08010133