G5130 Datasheet, PDF (1/10 Pages) Global Mixed-mode Technology Inc – PSM Step-up DC/DC Converter

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
Applications
„ Power Source for Portable Equipments
„ Handheld Computers, Palmtops
„ Digital Still Cameras, Camcorders
„ Cellular Phones, Pagers
„ Portable Multimedia Players
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.
Pin Configuration
Top View
12 3
SOT-89
5
4
12 3
SOT-23-5
Ver: 0.3 Preliminary
Jun 15, 2005
Typical Application Circuit
27µH~120µH
VIN
Battery
1N5819
G5130
LX VOUT
GND
VOUT
2.5V~5.0V
Step 0.1V
+
- ^{22µF~100µF}
27µH~120µH
VIN
Battery
1N5819
G5131
EXT VOUT
GND
VOUT
2.5V~5.0V
Step 0.1V
+
- ^{22µF~100µF}
TEL: [phone]
http://www.gmt.com.tw
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