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Description:
G5131-29T11UF PSM Step-up DC/DC Converter
Prototype PCB
Part No.:   G5131-29T11UF
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Description:   PSM Step-up DC/DC Converter
File Size :   610 K    
Page : 11 Pages
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Maker   GMT [ GLOBAL MIXED-MODE TECHNOLOGY INC ]http://www.gmt.com.tw
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Global Mixed-mode Technology Inc.
G5130/G5131
PSM Step-up DC/DC Converter
Features
1~4 Cell Alkaline Battery Operating Range
Output Voltage Range: 2.5V~5.0V in 0.1V In-
crements
Minimum External Component (L, D, C)
100kHz Max. Oscillation Frequency
75% Duty Ratio
Up to 80% Efficiency
±2%
High Output Voltage Accuracy
< 100ppm/°C Temperature Coefficient
SOT-89 and SOT-23-5 Small Packages
General Description
The G5130/G5131 boost converter is designed for use
of main power source on portable equipments.
It consist of an oscillator, PSM control logic circuit, an
embedded power MOS (LX switch), accurate voltage
reference, error amplifier, feedback resistors, and LX
protection circuit.
Only 3 external components (includes 1 inductor, 1
diode and 1 capacitor) are needed to construct the
power application.
For larger output power application, G5131 can be
used to drive an external NPN device for more input
current.
Applications
Power Source for Portable Equipments
Handheld Computers, Palmtops
Digital Still Cameras, Camcorders
Cellular Phones, Pagers
Portable Multimedia Players
Pin Configuration
Typical Application Circuit
1N5819
G5130
27µH~120µH
V
OUT
LX
V
IN
Battery
1
2
3
VOUT
GND
+
- 22µF~100µF
Top View
2.5V~5.0V
Step 0.1V
SOT-89
27µH~120µH
5
4
V
IN
1N5819
G963
Battery
G5131
V
OUT
EXT
VOUT
GND
+
- 22µF~100µF
2.5V~5.0V
Step 0.1V
1
2
3
SOT-23-5
Ver: 0.5 Preliminary
Aug 18, 2006
TEL: 886-3-5788833
http://www.gmt.com.tw
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