SGM61230
4.5V to 28V Input, 3A Output,
Synchronous Buck Converter
GENERAL DESCRIPTION
FEATURES
The SGM61230 is a synchronous Buck converter with a
wide input voltage range of 4.5V to 28V. This device
can deliver up to 3A to the output over a wide input
voltage. It is an easy-to-use device with power switches
and peak current mode control compensation all
integrated in a small 6-pin package. A typical 5ms
soft-start ramp is also included to minimize the inrush
current.
● Wide 4.5V to 28V Input Voltage Range
● 3A Continuous Output Current
● Integrated 66mΩ/36mΩ Power MOSFETs
● Low Quiescent Current: 25μA (TYP)
● Shutdown Current: 2μA (TYP)
● 5ms Internal Soft-Start Time
● Fixed 410kHz Switching Frequency
● Pulse Skip Mode and PWM Mode
● Peak Current Mode Control
This device employs cycle-by-cycle peak current limit,
output over-voltage protection and thermal shutdown
with auto recovery. The current limit is implemented for
both switches and has foldback feature to prevent
overheating (and thermal shutdown) when an output
short is detected. Auto recovery after over-current,
output short, overheating or over-voltage fault maintains
the system operational with no shutdown.
● Internal Loop Compensation
● Over-Current Protection for Both MOSFETs
● Output Over-Voltage Protection
● Adjustable Input Under-Voltage Lockout
● Thermal Shutdown with Auto Recovery
● Available in a Green TSOT-23-6 Package
This converter has a fixed 410kHz switching frequency
that minimizes the EMI noise problems. However the
actual frequency drops during PSM (pulse skip mode)
to maximize efficiency at light load. It also drops in
some fault conditions.
APPLICATIONS
12V Distributed Power Supply Buses
Industrial and Consumer Applications
White Goods
Audio Equipment
The SGM61230 is available in a Green TSOT-23-6
package.
Set Top Boxes
Digital Television Printers
TYPICAL APPLICATION
BOOT
VIN
VIN
CBOOT
VOUT
CIN
SW
L
SGM61230
COUT
RFB1
EN
FB
GND
RFB2
Figure 1. Typical Application Circuit
SG Micro Corp
APRIL 2022 – REV. A. 1
www.sg-micro.com