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G5691 Datasheet(PDF) 1 Page - Global Mixed-mode Technology Inc

Part # G5691
Description  1.5MHz, 1A High Efficiency Buck Converter
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Manufacturer  GMT [Global Mixed-mode Technology Inc]
Direct Link  http://www.gmt.com.tw
Logo GMT - Global Mixed-mode Technology Inc

G5691 Datasheet(HTML) 1 Page - Global Mixed-mode Technology Inc

  G5691 Datasheet HTML 1Page - Global Mixed-mode Technology Inc  
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Ver: 0.9
Jun 21, 2012
TEL: 886-3-5788833
http://www.gmt.com.tw
1
G5691
Global Mixed-mode Technology
1.5MHz, 1A High Efficiency Buck Converter
Features
Input voltage: 2.5V ~5.5V
High efficiency (95%)
No Schottky Diode Required
1A Output Current at 5V Input 3.3V Output
1.5MHz Switching Frequency
Built-in ON/OFF Function
Low Dropout Operation: 100% Duty Cycle
Thermal Protection
Tiny 6-Lead TDFN2X2 Package
RoHS Compliant
Applications
Mobile Phones
Wireless and DSL modems
Power Supply for Portable Devices
General Description
The G5691 provides complete control for a DC/DC
converter optimized for high-performance microproc-
essor applications. It is operated on current mode ar-
chitecture for excellent line and load transient re-
sponse. 1.5MHz operation frequency is allowing the
use of small surface mount inductor and capacitor.
The internal synchronous switch increases efficiency
and eliminates the need for an external Schottky diode.
The G5691 is a family of low-noise synchronous
step-down DC/DC converters that is ideally suited for
systems powered from a 1-cell Li-ion battery or from a
3-cell to 4-cell NiCd, NiMH, or alkaline battery. It can
also be used to USB-Based power system.
Ordering Information
ORDER
NUMBER
MARKING
OUTPUT
VOLTAGE (V)
TEMP.
RANGE
PACKAGE
(Green)
G5691RB1U
5691
Adjustable
-40°C~ +85°C
TDFN2X2-6
G5691-12RB1U
5691A
1.2
-40°C~ +85°C
TDFN2X2-6
G5691-33RB1U
5691E
3.3
-40°C~ +85°C
TDFN2X2-6
Note: RB: TDFN2X2-6
1: Bonding Code
U: Tape & Reel
Pin Configuration
Typical Application Circuit
TDFN2X2-6
G5691
EN
NC
GND
FB
VIN
LX
FB
GND
G5691
C
IN
4.7µF
V
IN
5V
2.2µH
C
OUT
10µF
V
OUT
3.3V/1A
V
OUT = 0.6V × (1+
)
R1
R2
1
2
3
6
5
4
Thermal
Pad
VIN
LX
EN
(optional)
C
FB
R1
R2
*
*R2= 150K for stability consideration.
Note: Recommend connecting the Thermal Pad to
the Ground for excellent power dissipation.
5
3
2
6
4
TDFN2X2-6
G5691
EN
NC
GND
FB
VIN
LX
FB
GND
G5691
C
IN
4.7µF
V
IN
5V
2.2µH
C
OUT
10µF
V
OUT
3.3V/1A
V
OUT = 0.6V × (1+
)
R1
R2
1
2
3
6
5
4
Thermal
Pad
VIN
LX
EN
(optional)
C
FB
R1
R2
*
*R2= 150K for stability consideration.
Note: Recommend connecting the Thermal Pad to
the Ground for excellent power dissipation.
5
3
2
6
4


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