描述 Description

The LS12052BD33 family of integrated load switches provides an

easy circuit protection to power the system. The device uses few

external components and provides multiple protection modes.

They are a robust defense against overload, short circuit, input

voltage surge, excessive inrush current and reverse current

blocking with an external NFET. The switch’s low RDS(ON) helps to

reduce power loss during normal operation. Current limit level can

be set with a single external resistor. Input over voltage events are

protected by internal clamp circuitry to a safe output voltage.

Programmable soft-start controls the slew rate of the output

voltage to limit inrush current during plug in. It integrates thermal

fold-back function and over temperature shutdown protection. The

BFET pin is provided to drive an external NFET which can be

connected “Back to Back” with the LS12052BD33 output. The

external NFET gate is driven by BFET to prevent current flow from

the load to the source. LS12052BD33 is available in small DFN

3mm x 3mm-10 package.

Features and Benefits

■ Wide Input Voltage Range

from 2.7V to 18V

■ Extremely Low RDS(ON) for the

Integrated Protection Switch:

25mΩ

■ External Programmable Soft-

Start Time

■ External Programmable

Current Limit

■ Support Reverse Current

Blocking

■ Short-circuit Protection

■ Fixed Over-voltage 14.4V

Output Voltage Clamp

■ Accurate 1.29V EN Pin Turnon

Threshold

■ Thermal Shutdown

Protection& Auto Recovery

■ DFN3×3_10L Packages

■ Pb-Free and RoHS Compliant

Applications

■ HDD and SSD Drives

■ Adapter Powered Devices

■ Notebook PC

■ PCI, PCIe Cards

■ Industry