SGM61180
4.5V to 18V Input, 8A,
Synchronous Buck Converter
GENERAL DESCRIPTION
FEATURES
The SGM61180 is an efficient, 8A, synchronous Buck
converter with integrated power MOSFETs and a wide
4.5V to 18V input range. This current mode control
device is optimized for high density applications with
minimal number of external components. High
switching frequency, up to 2000kHz, can be chosen to
lessen the solution size by smaller inductor and
capacitors. This device can be used as a standalone or
tracking power supply. The SS/TR pin can be used to
control the output voltage startup ramp or as an input
for tracking.
• Low Integrated RDSON Switches: 24mΩ/15mΩ
• Split Rails for Supply (VIN) and Power (PVIN)
1.8V to 18V Range for PVIN
4.5V to 18V Range for VIN
• 200kHz to 2000kHz Switching Frequency
• External Clock Synchronization
• Voltage Tracking Capability
• 0.6V Internal Reference Voltage
• ±1% Reference Voltage Accuracy
• 3.4μA (TYP) Shutdown Current
• Hiccup Mode Current Limit
• Monotonic Startup with Pre-biased Outputs
• Adjustable Soft-Start Time
Power supply sequencing for two or more power
supplies is possible by using the enable input (EN) and
the open-drain power good output (PG) signals.
• Power Sequencing Capability
The high-side MOSFET current is cycle-by-cycle
limited for overload protection. The low-side MOSFET
sourcing current is also limited to prevent current
runaway. The low-side switch also has a sinking
current limit that turns it off if an excessive reverse
current flows through it.
• Power Good Output Monitor for Under-Voltage
and Over-Voltage Protections
• Adjustable Input Under-Voltage Lockout (UVLO)
• Thermal Shutdown (+175℃)
• Available in a Green TQFN-3.5×3.5-14L Package
Thermal shutdown protection is activated to prevent
damage to the device when the junction temperature is
above the shutdown threshold.
APPLICATIONS
Industrial and Commercial Power Systems
Distributed Power Systems
Server and Storage
The SGM61180 is available in a Green TQFN-3.5×3.5-14L
package.
Communications Equipment
TYPICAL APPLICATION
CBOOT
Efficiency vs. Load Current
100
BOOT
L1
PVIN
VIN
VOUT
VIN
SW
80
60
40
COUT
CIN
EN
R1
R2
SGM61180
SS/TR
FB
RT/CLK
COMP
PG
R3
C1
GND
CSS
C2
RRT
20
0
VOUT = 3.3V
DCR = 4.4mΩ
VIN = 8V
VIN = 12V
VIN = 18V
f
SW = 480kHz
Figure 1. Typical Application Circuit
0
1
2
3
4
5
6
7
8
Load Current (A)
SG Micro Corp
JULY 2023 – REV. A. 2
www.sg-micro.com