AME7739 Datasheet, PDF (1/11 Pages) Analog Microelectronics – Step-Up / Step-Down 60mA Regulated Charge Pump

AME, Inc.
AME7739
n 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^OC to 85^OC.
n Features
l Output Voltage Range:
5.5V, 5V, 3.3V, 3.0V, 2.7V, 2.5V
l Accurate to with ±5%
l 1MH_Z Switching Frequency
l Shutdown Supply Current < 1µA
l Short Circuit Protection:Typ. 80mA
l Over Temperature Protection
l All AME's Lead Free Product Meet RoHS
Standards
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
Step-Up / Step-Down
60mA Regulated Charge Pump
n Functional Block Diagram
C-
V_IN
φ2
C+
φ1
φ1
φ1 φ2
EN
Control
φ2
-
EA
+
V_OUT
GND
n Typical Application
C_PUMP = 0.22µF
3.0V to 5.5V
V_IN
C+
OUT
AME
IN 7739 GND
5V / 60mA
V_OUT
C_OUT = 2.2µF
C_IN = 2.2µF
C-
EN ON OFF
1
Rev.A.02