AME, Inc.
AME7739
Step-Up / Step-Down
60mA Regulated Charge Pump
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Functional Block Diagram
V
IN
φ2
C-
C+
φ1
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General Description
The AME7739 is a charge pump voltage converter that
delivers a regulated output. No external inductor is re-
quired for operation. Using three small capacitors, the
AME7739 can deliver up to 60mA to the voltage regu-
lated output. The AME7739 features very low output ripple
and high efficiency over a large portion of its load range
making this device ideal for battery-powered applications.
Furthermore, the combination of few external components
and small package size keep the total converter board
area to a minimum in space restricted applications.
The AME7739 contains a thermal management circuit
to protect the device under continuous output short cir-
cuit conditions.
The AME7739 is available in SOT-26 package and is
rated from -40
O
C to 85
O
C.
φ1
φ2
V
OUT
φ1
φ2
-
Control
EA
+
EN
GND
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Features
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Output Voltage Range:
5.5V, 5V, 3.3V, 3.0V, 2.7V, 2.5V
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Accurate to with
±5%
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1MH
Z
Switching Frequency
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Shutdown Supply Current < 1µA
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Short Circuit Protection:Typ. 80mA
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Over Temperature Protection
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All AME's Lead Free Product Meet RoHS
Standards
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Typical Application
C+
C
PUMP
= 0.22µF
3.0V to 5.5V
V
IN
IN
OUT
5V / 60mA
V
OUT
C
OUT
= 2.2µF
AME
7739
GND
C-
C
IN
= 2.2µF
EN
ON OFF
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Applications
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Cellular Phone
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Digital Camera
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PDAs LCD display
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LED/Display Back Light Driver
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Smart Card Reader
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SIM Card Supply
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PCMCIA Card
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LCD Display
1
Rev.A.01
AME [ ANALOG MICROELECTRONICS ]
