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AME7721 Datasheet Preview

AME7721 Datasheet

Step-Up/Step-Down 60mA Regulated Charge Pump

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AME, Inc.
AME7720 / 7721
n General Description
The AME7720 / 7721 is switched-capactitor voltage
doublers that delivers a regulated output. No external in-
ductor is required for operation. Using three small ca-
pacitors, the AME7720 / 7721 can deliver up to 60mA to
the voltage regulated output. The AME7720 / 7721 fea-
tures very low output pipple and high efficiency over a
large portion of its load range making this device ideal for
battery-powered applications. Furthermore, the combi-
www.nDaatitoanShoefetfe4Uw.ceoxmternal components and small package
size keeps the total converter board area to a minimum
in space restricted applications.
The AME7720 / 7721 contains a thermal management
circuit to protect the device under continuous output short
circuit conditions.
The AME7720 / 7721 is available in SOT-25 / SOT-26
package and is rated from -40OC to 85OC.
n Features
l Input Voltage Range:
5V Version: 2.7V to 5.5V
3.3V Version: 1.8V to 5.5V
l Accurate to with ±5%
l Output Current:
5V Version: 60mA with VIN>=3.0V
3.3V Version: 60mA with VIN >=2.2V
l 1MHZ Switching Frequency
l Shutdown Mode < 1µA (AME7720)
l Short Circuit Protection:Typ. 80mA
l Over Temperature Protection
l All AMEs Lead Free Product Meet RoHS
Standards
Step-Up/Step-Down
60mA Regulated Charge Pump
n Applications
l Cellular Phone
l Digital Camera
l PDAs LCD display
l LED/Display Back Light Driver
l Smart Card Reader
l SIM Card Supply
l PCMCIA Card
l LCD Display
n Functional Block Diagram
VIN
φ2
AME7720
C-
C+
φ1
φ1
φ1 φ2
EN
Control
φ2
EA
VOUT
AME7721
GND
C-
VIN
C+
φ2 φ1
φ1
φ1 φ2
Control
φ2
EA
V OUT
GND
1




AME

AME7721 Datasheet Preview

AME7721 Datasheet

Step-Up/Step-Down 60mA Regulated Charge Pump

No Preview Available !

AME, Inc.
AME7720 / 7721
n Typical Application
Step-Up/Step-Down
60mA Regulated Charge Pump
www.DataSheet4U.com
CPUMP = 0.22µF
3.0V to 5.5V
VIN
AME7720
C+ VOUT
AME
VIN 7720 GND
5V / 60mA
VOUT
COUT =2.2µF
CIN=2.2µF
C- EN ON OFF
CPUMP = 0.22µF
3.0V to 5.5V
VIN
AME7721
C+ VOUT
AME
VIN 7721 GND
5V / 60mA
VOUT
COUT =2.2µF
CIN=2.2µF
C-
2


Part Number AME7721
Description Step-Up/Step-Down 60mA Regulated Charge Pump
Maker AME
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AME7721 Datasheet PDF






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