AAT3111 Datasheet, PDF (1/16 Pages) Advanced Analogic Technologies – MicroPower™ Regulated Charge Pump

AAT3111
MicroPower™ Regulated Charge Pump
General Description
Features
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The AAT3111 ChargePump is a MicroPower
switched capacitor voltage converter that delivers a
regulated output. No external inductor is required
for operation. Using three small capacitors, the
AAT3111 can deliver up to 150mA to the voltage
regulated output. The AAT3111 features very low
quiescent current 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 AAT3111 operates in an output-regulated volt-
age doubling mode. The regulator uses a pulse-
skipping technique to provide a regulated output
from a varying input supply. The AAT3111 contains
a thermal management circuit to protect the device
under continuous output short-circuit conditions.
The AAT3111 is available in a Pb-free, surface-
mount 6-pin SOT23 or 8-pin SC70JW package and
is rated over the -40°C to +85°C temperature
range.
• Step-Up Type Voltage Converter
• Input Voltage Range:
— AAT3111-3.6: 1.8V to 3.6V
— AAT3111-3.3: 1.8V to 3.3V
• MicroPower Consumption: 20µA
• 3.6V, 3.3V Regulated ±4% Output
• 3.6V Output Current
— 100mA with V_IN ≥ 3.0V
— 20mA with V_IN ≥ 2.0V
• 3.3V Output Current
— 100mA with V_IN ≥ 2.5V
— 20mA with V_IN ≥ 1.8V
• High Frequency 750kHz Operation
• Shutdown Mode Draws Less Than 1µA
• Short-Circuit/Over-Temperature Protection
• 2kV ESD Rating
• SC70JW-8 or SOT23-6 Package
Applications
• Battery Back-Up Supplies
• Digital Cameras
• Handheld Electronics
• MP3 Players
• PDAs
Typical Application
V_OUT
C_OUT
10uF
ON/OFF
AAT3111
VOUT
C+
GND
VIN
SHDN
C-
1uF
V_IN
C_IN
10uF
3111.2006.06.1.3
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