AME7720 Datasheet Text
AME, Inc.
AME7720 / 7721 n General Description
The AME7720 / 7721 is switched-capactitor voltage doublers that delivers a regulated output. No external inductor is required for operation. Using three small capacitors, the AME7720 / 7721 can deliver up to 60mA to the voltage regulated output. The AME7720 / 7721 Features 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 bi.. nation of few external ponents 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.
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
AME7720
VIN φ2 CC+
φ1 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 AME’ s Lead Free Product Meet RoHS Standards
VIN EN
φ1
φ2 VOUT φ1 φ2 EA
Control
GND
AME7721
CC+
φ2
φ1
φ1
φ2 V OUT φ1 φ2 EA
Control
GND
1
AME, Inc.
AME7720 / 7721 n Typical Application
AME7720
5V / 60mA VOUT C OUT =2.2µF GND
Step-Up/Step-Down 60mA Regulated Charge Pump
C+ CPUMP = 0.22µF
VOUT
..
3.0V to 5.5V...