SGM61020S
2A High Efficiency
Synchronous Buck Converter
SG Micro Corp
www.sg-micro.com
NOVEMBER
2023
–
REV.
A
GENERAL DESCRIPTION
The SGM61020S is a high efficiency synchronous Buck
DC/DC converter with 2A output current capability and
adjustable output voltage. The input supply voltage is in
the range of 2.5V to 5.5V. Using adaptive off-time peak
current control, the efficiency of this device is higher
than 80% for loads over 1mA and reaches 95% in the
moderate load ranges (5V to 3.3V).
This device operates with a quasi-fixed 1.5MHz pulse
width modulation (PWM) mode for moderate or heavy
loads. But at light loads, pulse skip modulation is used
for power-save mode (PSM). The PSM operating
quiescent current is very low, typically 44μA, which is
well suitable for battery powered applications to prolong
battery life. Despite such low quiescent current, the
transient response to large load variations is excellent.
The device shutdown current is less than 0.5μA.
The SGM61020S provides an adjustable output voltage
by an external resistor divider. The device is capable for
low dropout operation with 100% duty cycle. Some
other features include internal soft-start for limiting
startup inrush current, over-current and thermal
shutdown protections, enable input and power good
output (for SGM61020PS version only).
The SGM61020S is available in a Green SOT-23-5
package and the SGM61020PS is available in a Green
SOT-23-6 package.
FEATURES
● 2.5V to 5.5V Input Voltage Range
● Adjustable Output Voltage from 0.6V to V
IN
● Up to 95% Efficiency
● Low R
DSON
Switches (99mΩ/51mΩ)
● Power-Save Mode for Light Load Efficiency
● 44μA (TYP) Operating Quiescent Current
● 100% Duty Cycle for Low Dropout Operation
● 1.5MHz PWM Switching Frequency
● Power Good Output (SGM61020PS Only)
● Over-Current Protection
● Thermal Shutdown Protection
● Input Under-Voltage Lockout (UVLO) Protection
● -40
℃ to +125℃ Operating Temperature Range
● Small Packaging:
SGM61020S: Available in a Green SOT-23-5
Package
SGM61020PS: Available in a Green SOT-23-6
Package
APPLICATIONS
General Purpose POL Supply
Set-Top Box
Network Video Camera
Wireless Router
Hard Disk Driver
TYPICAL APPLICATION
V
IN
2.5V to 5.5V
SGM61020PS
C
IN
4.7μF
R
1
100kΩ
R
2
49.9kΩ
R
3
499kΩ
L
1
2.2μH
C
OUT
10μF
V
OUT
1.8V
Power Good
PG
FB
VIN
EN
GND
SW
C
2
4pF
Figure 1. Typical Application Circuit
2A High Efficiency
SGM61020S Synchronous Buck Converter
2
NOVEMBER 2023
SG Micro Corp
www.sg-micro.com
PACKAGE/ORDERING INFORMATION
MODEL
PACKAGE
DESCRIPTION
SPECIFIED
TEMPERATURE
RANGE
ORDERING
NUMBER
PACKAGE
MARKING
PACKING
OPTION
SGM61020S SOT-23-5
-40℃ to +125℃
SGM61020SXN5G/TR
031XX Tape and Reel, 3000
SGM61020PS SOT-23-6
-40℃ to +125℃
SGM61020PSXN6G/TR
0GGXX Tape and Reel, 3000
MARKING INFORMATION
NOTE:
XX = Date Code.
Date Code - Year
Date Code - Week
Serial Number
YYY X X
Green (RoHS & HSF): SG Micro Corp defines "Green" to mean Pb-Free (RoHS compatible) and free of halogen substances. If
you have additional comments or questions, please contact your SGMICRO representative directly.
ABSOLUTE MAXIMUM RATINGS
Voltage Range
(1)
VIN, EN, PG ......................................................... -0.3V to 6V
SW (DC) ................................................... -0.3V to V
IN
+ 0.3V
SW (AC, Less than 10ns)
(2)
................................... -2V to 9V
FB ..................................................................... -0.3V to 5.5V
Package Thermal Resistance
SOT-23-5, θ
JA
.......................................................... 172℃/W
SOT-23-6, θ
JA
.......................................................... 157℃/W
Junction Temperature ................................................. +150℃
Storage Temperature Range ........................ -65℃ to +150℃
Lead Temperature (Soldering, 10s) ............................ +260℃
ESD Susceptibility
HBM ............................................................................. 4000V
CDM ............................................................................ 1000V
NOTES:
1. All voltage values are with respect to the ground terminal.
2. While switching.
RECOMMENDED OPERATING CONDITIONS
Input Voltage Range, V
IN
..................................... 2.5V to 5.5V
Output Voltage Range, V
OUT
................................. 0.6V to V
IN
Output Current Range, I
OUT
...................................... 0A to 2A
Sink Current at PG Pin, I
SINK_PG
...................................... 1mA
Operating Junction Temperature Range ...... -40℃ to +125℃
OVERSTRESS CAUTION
Stresses beyond those listed in Absolute Maximum Ratings
may cause permanent damage to the device. Exposure
to
absolute maximum rating conditions for extended periods
may affect reliability. Functional operation of the device at any
conditions beyond those indicated in the Recommended
Operating Conditions section
is not implied.
ESD SENSITIVITY CAUTION
This integrated circuit can be damaged if ESD protections are
not considered carefully. SGMICRO recommends that all
integrated circuits be handled with appropriate precautions.
Failure
to observe proper handling
and installation procedures
can cause damage. ESD damage can range from subtle
performance
degradation to
complete device failure. Precision
integrated circuits may be more susceptible to damage
because even small parametric changes could cause the
device not to meet the published specifications.
DISCLAIMER
SG Micro Corp reserves the right to make any change in
circuit
design, or specifications
without prior notice.