SGM660
Buck-Boost Converter for
Negative Output Voltage
SG Micro Corp
www.sg-micro.com
AUGUST 2021 – REV. A
GENERAL DESCRIPTION
The SGM660 is an inverting buck-boost converter with
adjustable negative output voltage in a tiny 6-ball thin
WLCSP package. Its unique control method is
designed to provide fast transient response, low output
noise and high efficiency. The SGM660 has built-in
soft-start, peak current limit, and under-voltage lockout
functions with no external compensation required. For
ease of use, the digital interface control (SWIRE) pin
allows programming of the negative output voltage in
digital steps.
APPLICATIONS
General Purpose Negative Voltage Supply
Negative Rail/Bias Supply for OPA and Data Converters
LCD Biasing
Sensor and Modulator Bias
FEATURES
● 2.8V to 5.5V Input Voltage Range
● Adjustable Output Voltage:
-0.8V to -5.2V, 0.1V/Step
● Programmable Switching Current Limit:
810mA (Default)/620mA/435mA
● Programmable Switching Frequency:
1.8MHz/1.6MHz (Default)/1.4MHz
● No External Compensation
● Internal Soft-Start Function
● Shutdown Current: 1μA (MAX)
● Available in a Green WLCSP-0.9×1.3-6B Package
TYPICAL APPLICATION
Input
2.8V to 5.5V
C
IN
10μF
SWIRE
VIN
GND
SW
VOUT
L
4.7μH
C
OUT
10μF
Output
-0.8V to -5.2V
Enable V
OUT
Program Device
SGM660
Figure 1. Typical Application Circuit
Buck-Boost Converter for
SGM660 Negative Output Voltage
2
AUGUST 2021
SG Micro Corp
www.sg-micro.com
PACKAGE/ORDERING INFORMATION
MODEL
PACKAGE
DESCRIPTION
SPECIFIED
TEMPERATURE
RANGE
ORDERING
NUMBER
PACKAGE
MARKING
PACKING
OPTION
SGM660 WLCSP-0.9×1.3-6B
-40℃ to +125℃
SGM660XG/TR
XXX
ORB
Tape and Reel, 3000
MARKING INFORMATION
NOTE: XXX = Date Code and Trace Code.
X X X
Y Y Y
Date Code - Year
Trace Code
Serial Number
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
VIN to GND Voltage ............................................. -0.3V to 6V
VOUT to GND Voltage ......................................... -6V to 0.3V
SW to GND Voltage ........................ V
OUT
- 0.3V to V
IN
+ 0.3V
SWIRE to GND Voltage ....................................... -0.3V to 6V
Package Thermal Resistance
WLCSP-0.9×1.3-6B, θ
JA
.......................................... 192℃/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
.................................... 2.8V to 5.5V
Output Voltage Range, V
OUT
............................ -0.8V to -5.2V
Operating Ambient Temperature Range ...... -40℃ to +125℃
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.