AME, Inc.
AME7730
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General Description
The AME7730 is a charge pump voltage doublers that
delivers a regulated output. No external inductor is re-
quired for operation. Using three small capacitors, the
AME7730 can deliver up to 100mA to the voltage regu-
lated output. The AME7730 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 keeps the total converter board
area to a minimum in space restricted applications.
The AME7730 contains a thermal management circuit
to protect the device under continuous output short cir-
cuit conditions.
The AME7730 is available in SOT-26 / TSOT-26 pack-
age and is rated from -40
O
C to 85
O
C.
100mA Regulated Charge Pump
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Functional Block Diagram
V
IN
φ2
C-
C+
φ1
φ1
φ2
V
OUT
φ1
φ2
EA
EN
Control
GND
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Features
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Input Voltage Range: 2.7V to 5V
Accurate to with ±4%
Output Current: 100mA with V
IN
>= 3.0V
50mA with V
IN
>= 2.7V
1MHz Switching Frequency
Shutdown Mode < 1µA
Short Circuit Protection
Over Temperature Protection
All AME's Lead Free Product Meet RoHS
Standards
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Typical Application
C+
C
FLY
= 1µF
3.0V to 5V
V
IN
V
IN
V
OUT
5V / 100mA
V
OUT
C
OUT
=10µF
AME
7730
GND
C
IN
=10µF
C-
EN
ON OFF
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Applications
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Cellular Phones
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Digital Cameras
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PDAs LCD displays
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LED / Display Back Light Driver
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LEDs for Comera Flash
Rev.A.01
1
AME [ ANALOG MICROELECTRONICS ]
