ANALOGIC TECH AAT3110IJS-4.5-T1

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Item Description: LED Lighting Drivers MicroPower Regulated Charge Pump

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Technical Document


DISCLAIMER: The information provided herein is solely for informational purposes. Customers must be aware of the suitability of this product for their application, and consider that variable factors such as Manufacturer, Product Category, Date Codes, Pictures and Descriptions may differ from available inventory.

SmartSwitch
AAT3110
MicroPower™ Regulated Charge Pump
3110.2005.11.1.4 1
ChargePump
General Description
The AAT3110 ChargePump is a member of
AnalogicTech's Total Power Management IC™
(TPMIC™) product family. It is a MicroPower
switched capacitor voltage converter that delivers a
regulated output. No external inductor is required
for operation. Using three small capacitors, the
AAT3110 can deliver up to 100mA to the voltage
regulated output. The AAT3110 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
AAT3110 operates in an output regulated voltage
doubling mode. The regulator uses a pulse skip-
ping technique to provide a regulated output from a
varying input supply. The AAT3110 contains a ther-
mal management circuit to protect the device
under continuous output short-circuit conditions.
The AAT3110 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.
Features
Step-Up Voltage Converter
Input Voltage Range:
AAT3110-5: 2.7V to 5V
AAT3110-4.5: 2.7V to 4.5V
MicroPower Consumption: 13µA
Regulated 5V, 4.5V ±4% Output
5V Output Current:
100mA with V
IN
3.0V
50mA with V
IN
2.7V
4.5V Output Current:
100mA with V
IN
3.0V
50mA with V
IN
2.7V
Peak Current 250mA for 100ms
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
Cellular Phones
Digital Cameras
Handheld Electronics
LED/Display Backlight Driver
LEDs for Camera Flash
PDAs
Portable Communication Devices
Typical Application
V
IN
VOUT
GND
SHDN
C+
VIN
C-
AAT3110
V
OUT
1µF
10µF
10µF
ON/OFF
C
OUT
C
IN
Pin Descriptions
Pin Configuration
SOT23-6 SC70JW-8
GND
GND
GND
C+
VIN
C-
SHDN
VOUT
1
2
3
45
6
7
8
GND
C+
VIN
C-
SHDN
VOUT
1
2
3
4
5
6
Pin #
SOT23-6 SC70JW-8
Symbol Function
1 1 VOUT Regulated output pin. Bypass this pin to ground with a
6.8µF (min) low equivalent series resistance (ESR) capacitor.
2 2, 3, 4 GND Ground connection.
3 5 SHDN Shutdown input. Logic low signal disables the converter.
4 6 C- Flying capacitor negative terminal.
5 7 VIN Input supply pin. Bypass this pin to ground with a 6.8µF
(min) low-ESR capacitor.
6 8 C+ Flying capacitor positive terminal.
AAT3110
MicroPower™ Regulated Charge Pump
2 3110.2005.11.1.4
Absolute Maximum Ratings
1
T
A
= 25°C, unless otherwise noted.
Thermal Information
3
Symbol Description Rating Units
Θ
JA
Maximum Thermal Resistance 150 °C/W
P
D
Maximum Power Dissipation 667 mW
Symbol Description Value Units
V
IN
V
IN
to GND -0.3 to 6 V
V
OUT
V
OUT
to GND -0.3 to 6 V
V
SHDN
SHDN to GND -0.3 to 6 V
t
SC
Output to GND Short-Circuit Duration Indefinite s
T
J
Operating Junction Temperature Range -40 to 150 °C
T
LEAD
Maximum Soldering Temperature (at leads, 10 sec) 300 °C
V
ESD
ESD Rating
2
— HBM 2000 V
AAT3110
MicroPower™ Regulated Charge Pump
3110.2005.11.1.4 3
1. Stresses above those listed in Absolute Maximum Ratings may cause permanent damage to the device. Functional operation at condi-
tions other than the operating conditions specified is not implied. Only one Absolute Maximum Rating should be applied at any one
time.
2. Human body model is a 100pF capacitor discharged through a 1.5k resistor into each pin.
3. Mounted on an FR4 board.
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