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SGM3803 Datasheet Preview

SGM3803 Datasheet

90% Efficient Synchronous Step-Up Converter

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SGM3803
90% Efficient Synchronous Step-Up Converter
with 200mA Negative Charge Pump Inverter
GENERAL DESCRIPTION
The SGM3803 is a constant frequency, current mode,
synchronous step-up switching regulator with 200mA
negative charge pump inverter which generates an
unregulated negative output voltage from an input
voltage ranging from 1.4V to 5.5V. The device is
typically used to generate +5V and -5V from battery.
High switching frequency minimizes the sizes of
inductor and capacitor. Only three external capacitors
are required to build a complete charge pump inverter.
Integrated power MOSFETs and internal compensation
of boost DC/DC make the SGM3803 simple to use and
fit the total solution into a compact space.
The negative charge pump in SGM3803 can deliver a
maximum output current of 200mA with a typical
conversion efficiency of greater than 80% over a wide
output current range.
For light load current, the SGM3803 boost DC/DC
enters into the power-save mode to maintain high
efficiency. Anti-ringing control circuitry reduces EMI
concerns by damping the inductor in discontinuous
mode. The SGM3803 boost DC/DC provides true
output disconnect and this allows VOUT1 to go to zero
volt during shutdown without drawing any current from
the input source. The SGM3803 supports 1.8V logic for
control.
The output voltage of SGM3803 boost DC/DC can be
programmed by an external resistor divider. Boost
DC/DC and negative charge pump inverter have
independent enable control.
The device is available in TDFN-3×3-12L package. It
operates over an ambient temperature range of -40
to +85.
FEATURES
Boost DC/DC
90% Efficient Synchronous Boost Converter
Device Quiescent Current: 30µA (TYP)
Less than 1μA Shutdown Current
Input Voltage Range: 2.7V to 5.5V
Output Voltage Clamping: 6V
Adjustable Output Voltage Up to 5.5V
Power-Save Mode for Improved Efficiency
at Low Output Power
Load Disconnect During Shutdown
Low Reverse Leakage Current when VOUT1 > VCC
1.8V Logic on EN1 Pin for Control
Over-Temperature Protection
Negative Charge Pump Inverter
Up to 200mA Output Current
Only Three Small 2.2μF to 4.7μF Ceramic
Capacitors Needed
Input Voltage Range: 1.4V to 5.5V
Low 1.5mA (TYP) Quiescent Current in Active
Status
950kHz Switching Frequency
1.8V Logic on EN2 Pin for Control
Integrated Active Schottky-Diode for Start-Up
into Load
APPLICATIONS
Single-Cell Li Battery Powered Products
Portable Audio Players
Cellular Phones
Personal Medical Products
SG Micro Corp
www.sg-micro.com
JUNE 2014 – REV. A. 1




SG Micro

SGM3803 Datasheet Preview

SGM3803 Datasheet

90% Efficient Synchronous Step-Up Converter

No Preview Available !

SGM3803
90% Efficient Synchronous Step-Up Converter
with 200mA Negative Charge Pump Inverter
PACKAGE/ORDERING INFORMATION
MODEL
PACKAGE
DESCRIPTION
SPECIFIED
TEMPERATURE
RANGE
ORDERING
NUMBER
SGM3803 TDFN-3×3-12L
-40to +85SGM3803YTDF12G/TR
PACKAGE
MARKING
SGM
3803DF
XXXXX
PACKING
OPTION
Tape and Reel, 3000
MARKING INFORMATION
NOTE: XXXXX = Date Code and Vendor Code.
XXXXX
Vendor Code
Date Code - Week
Date Code - Year
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
Input Voltage Range on SW, OUT1, VCC, FB, EN1, EN2, IN
........................................................................ .-0.3V to 6V
OUT2 ................................................................ -6V to 0.3V
CFLY- ..................................................... 0.3V to VOUT2 - 0.3V
CFLY+ ......................................................-0.3V to VIN + 0.3V
Junction Temperature .............................................. +150
Storage Temperature Range ...................... -65to +150
Lead Temperature (Soldering, 10s) .......................... +260
ESD Susceptibility
HBM ......................................................................... 4000V
MM............................................................................. 200V
RECOMMENDED OPERATING CONDITIONS
Operating Temperature Range......................-40to +85
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.
SG Micro Corp
www.sg-micro.com
JUNE 2014
2



Part Number SGM3803
Description 90% Efficient Synchronous Step-Up Converter
Maker SG Micro
Total Page 3 Pages
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