SGM61020
2A High Efficiency
Synchronous Buck Converter
SG Micro Corp
www.sg-micro.com
AUGUST 2022– REV. A.1
GENERAL DESCRIPTION
The SGM61020 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 42μA, which is
well suitable for battery-powered applications to
increase standby time. Despite such low quiescent
current, the transient response to large load variations
is excellent. The device shutdown current is typically
0.03μA.
The SGM61020 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 SGM61020P version only).
The SGM61020 is available in Green SOT-23-5 and
SOT-563-6 packages.
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
MOSFET Switches (100mΩ/55mΩ)
● Power-Save Mode for Light Load Efficiency
● 42μA (TYP) Operating Quiescent Current
● 100% Duty Cycle Capability for Low Dropout
● 1.5MHz PWM Switching Frequency
● Power Good Output (SGM61020P Only)
● Over-Current Protection
● Thermal Shutdown Protection
● Input Under-Voltage Lockout (UVLO) Protection
● Small Packaging:
SGM61020: Available in Green SOT-23-5 and
SOT-563-6 Packages
SGM61020P: Available in a Green SOT-563-6
Package
APPLICATIONS
Battery-Powered Applications
Point-of-Load
Processor Power Supplies
Hard Disk Drives (HDD)/Solid State Drives (SSD)
TYPICAL APPLICATION
V
IN
2.5V to 5.5V
SGM61020P
C
IN
4.7μF
R
1
200kΩ
R
2
100kΩ
R
3
510kΩ
L
1
2.2μH
C
OUT
10μF
V
OUT
1.8V
Power Good
PG
FB
VIN
EN
GND
SW
Figure 1. Typical Application Circuit
2A High Efficiency
SGM61020 Synchronous Buck Converter
2
AUGUST 2022
SG Micro Corp
www.sg-micro.com
PACKAGE/ORDERING INFORMATION
MODEL
PACKAGE
DESCRIPTION
SPECIFIED
TEMPERATURE
RANGE
ORDERING
NUMBER
PACKAGE
MARKING
PACKING
OPTION
SGM61020
SOT-23-5
-40℃ to +125℃
SGM61020XN5G/TR RAAXX Tape and Reel, 3000
SOT-563-6
-40℃ to +125℃
SGM61020XKB6G/TR ZMXX Tape and Reel, 5000
SGM61020P SOT-563-6
-40℃ to +125℃
SGM61020PXKB6G/TR ZNXX Tape and Reel, 5000
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.
MARKING INFORMATION
SOT-23-5
SOT-563-6
(1) XX = Date Code.
(2) XX = Date Code.
Date Code - Year
Date Code
-
Week
Serial Number
YYY X X
Date Code - Year
Date Code - Week
Serial Number
YY X X
ABSOLUTE MAXIMUM RATINGS
Voltage Range Referred to GND
VIN, EN, PG ......................................................... -0.3V to 6V
FB ..................................................................... -0.3V to 5.5V
SW (DC) ................................................... -0.3V to V
IN
+ 0.3V
SW (AC, Less than 10ns) while Switching .............. -2V to 9V
Package Thermal Resistance
SOT-23-5, θ
JA
.......................................................... 193℃/W
SOT-563-6, θ
JA
........................................................ 170℃/W
Junction Temperature ................................................. +150℃
Storage Temperature Range ........................ -65℃ to +150℃
Lead Temperature (Soldering, 10s) ............................ +260℃
ESD Susceptibility
HBM ............................................................................. 4000V
CDM ............................................................................ 1000V
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
........................................ 0 to 2A
PG Pin Sink Current, I
SINK_PG
............................... 1mA (MAX)
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.