GENERAL DESCRIPTION

The SGM40666AS and SGM40666BS are over-voltage

protection devices designed to protect low voltage

systems from damage with a high voltage supply up to

+31VDC and +40VPEAK (10s with 50mA current limit).

The SGM40666AS withstands +90V/-400V while the

SGM40666BS can also withstand surges up to +80V/

-400V without damage.

The integrated 27mΩ (TYP) RON FET allows it to pass

through 4.5A continuous current. The FET is turned off

when the input voltage exceeds the over-voltage

threshold, which can be adjusted between 4V and 22V

with the optional external resistors.

When the OVLO input is set below the external OVLO

select threshold (0.26V TYP), the SGM40666AS and

SGM40666BS automatically choose the internal trip

thresholds that are preset to 6.79V typically. SGMICRO

provides customized OVP threshold options for

22.2V/15.3V/10.5V/6.35V/5.95V. Please contact us if

necessary.

The open-drain output (nACOK) indicates a stable

power supply between minimum VIN and VOVLO.

The SGM40666AS and SGM40666BS are available in

a Green WLCSP-1.65×1.24-12B package.

FEATURES

● Wide Power Supply Voltage Range: 2.5V to 28V

● Input Voltage up to 40V with 50mA Current Limit

for 10s Duration

● Integrated Switch On-Resistance: 27mΩ (TYP)

● Wide Adjustable OVLO Threshold Range:

4V to 22V

● Internal Over-Voltage Protection Threshold:

6.79V (TYP)

● Surge Immunity

 SGM40666AS: Up to +90V/-400V Surge

Immunity

 SGM40666BS: Up to +80V/-400V Surge

Immunity

● 32.3V Clamping Circuit Trigger Threshold when

Rising Slope > 4.5V/μs (SGM40666AS)

● 45V Clamping Circuit Trigger Threshold

(SGM40666BS)

● Over-Voltage Shutdown Response: 50ns (TYP)

● Start-Up Debounce Time: 16.5ms

● Soft-Start Function

● Enable Function

● Thermal Shutdown Protection

● Power Good Flag

● Available in a Green WLCSP-1.65×1.24-12B

Package

APPLICATIONS

Battery Charging Ports

Mobile Phones

Tablet Computers