GENERAL DEscriptION

The SGM2557 is a dual-channel power distribution switch. The switch operates from a wide range of 2.7V to 5.5V supply voltage, and is controlled by the ENx pin. It can be used in USB power distribution applications.

A 90mΩ low RON N-MOSFET is integrated. The small size and current make the device very suitable for space limited, battery-powered applications.

A number of protection features are provided in the device including soft-start, current limit and thermal shutdown. The internal reverse-voltage function will protect devices on the input side of the switch. Fault conditions are indicated by the FAULTx pin. Transient faults are filtered internally.

When a fault is detected, the device will go into auto-retry mode.

The SGM2557 is available in Green SOIC-8 and TDFN-3×3-8L packages. It is rated over the -40℃ to +85℃ temperature range.

PIN CONFIGURATIONS

FEATURES

• Input Voltage Range: 2.7V to 5.5V

• High-side MOSFET Switch

• On-Resistance: 90mΩ (TYP)

• 1.1A Current Limit

• Current: 28μA (Dual-Channel)

• 1.8V Logic-Controlled Inputs

• Full Set of Protections

  Soft-Start

  Under-Voltage Lockout for VIN

  No Reversed Leakage Current

  Short-Circuit Protection

  Thermally Isolated Channels

  Fault Indication with 4ms Filter

• Available in Green SOIC-8 and TDFN-3×3-8L Packages

APPLICATIONS

Hot-Plug Power Supply

Motherboard USB Power Switch

Accessories

Portable Medical E