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 quiescent 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
Quiescent 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 Equipment