The SGM61138 is an adaptive constant on-time control (ACOT) synchronous Buck converter with a wide input voltage range of 4.5V to 17V. This device has 3A output current capability and operates at pseudo-fixed frequency. It is an easy-to-use device with power switches and internal compensation circuit, which are all integrated in a small 6-pin package, and supports low equivalent series resistance (ESR) output capacitors. A typical 0.7ms soft-start ramp is also included to minimize the inrush current.
Protection features include cycle-by-cycle current limit, hiccup mode short-circuit protection and thermal shutdown in case of excessive power dissipation.
The SGM61138A enters in pulse-skip mode to improve efficiency during light load operation, while the SGM61138B works in Forced PWM Mode over all load conditions to achieve low output ripple and good regulation.
The SGM61138 is available in a Green SOT-563-6 package.
- Wide 4.5V to 17V Input Voltage Range
- 3A Continuous Output Current
- Integrated 90mΩ/50mΩ Power MOSFETs
- 0.604V Reference Voltage
- Shutdown Current: 4μA (TYP)
- 0.7ms Internal Soft-Start Time
- Pseudo-Fixed 650kHz Switching Frequency
- Adaptive Constant On-Time Mode Control
- Pulse-Skip Mode (SGM61138A)
- Forced PWM Mode (SGM61138B)
- Adjustable Input Under-Voltage Lockout
- Cycle-by-Cycle Over-Current Limit
- Thermal Shutdown with Auto Recovery
- Available in a Green SOT-563-6 Package
12V Distributed Power Supply Buses
Industrial and Consumer Applications
General Purpose Point of Load
TV
Surveillance
Set-Top Boxes
京公网安备11010802046258号