AAT3112IVN-4.5-T1 Advanced Analog Technology, Inc., AAT3112IVN-4.5-T1 Datasheet

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AAT3112IVN-4.5-T1

Manufacturer Part Number
AAT3112IVN-4.5-T1
Description
500mA High Efficiency Charge Pump for White LED Flash Applications
Manufacturer
Advanced Analog Technology, Inc.
Datasheet

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General Description
The AAT3112 is a member of AnalogicTech's Total
Power Management IC™ (TPMIC™) family. It is a
dual voltage doubling charge pump that provides a
regulated output voltage. It operates with an input
voltage range of 2.7 to 5.0 volts. The device can
deliver a constant 200mA output load current and up
to 500mA of pulsed current. The 500mA peak cur-
rent capability of the AAT3112 makes it ideal for
white LED flash applications. A low external parts
count (two 1μF flying capacitors and two small
capacitors at V
ally suited for small battery-powered applications.
The AAT3112 has a thermal management system
to protect the device in the event of a short-circuit
condition at the output pin. Built-in soft-start circuit-
ry prevents excessive inrush current during start-
up.
enables the use of very small external capacitors.
A low current shutdown feature disconnects the
load from V
than 1μA. The AAT3112 is available in a Pb-free
16-pin 3x3mm QFN package and is rated over the
-40°C to +85°C temperature range.
3112.2007.01.1.5
Typical Application
A high charge pump switching frequency
IN
and reduces quiescent current to less
IN
Enable Flash
Enable Light
and V
V
IN
OUT
) makes the AAT3112 ide-
C
IN
EN1
EN2
VIN
C1 = 1μF
C1
+
AAT3112
C1
-
GND
C2 = 1μF
C2
+
VOUT1
VOUT2
C2
500mA High Efficiency Charge Pump
-
Features
Applications
for White LED Flash Applications
D1
Input Voltage Range:
— AAT3112-5.0: 2.7V to 5.0V
— AAT3112-4.5: 2.7V to 4.5V
Up to 500mA Peak Output Current
200mA Continuous Output Current
I
Regulated 4.5V or 5.0V Output
26μA of Quiescent Current
Small Application Circuit
Automatic Soft Start
No Inductors
Short-Circuit/Over-Temperature Protection
16-Pin 3x3mm QFN Package
Temperature Range: -40°C to +85°C
General-Purpose High-Current Boost Supply
White LED Backlighting
White LED Photo Flash
Q
<1μA in Shutdown
D2
D3
R
B
ChargePump
C
D4
OUT
1

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AAT3112IVN-4.5-T1 Summary of contents

Page 1

General Description The AAT3112 is a member of AnalogicTech's Total Power Management IC™ (TPMIC™) family dual voltage doubling charge pump that provides a regulated output voltage. It operates with an input voltage range of 2.7 to 5.0 ...

Page 2

Pin Descriptions Pin # Symbol Function N/C No connect. 2 C2+ Flying capacitor 2 positive terminal. Connect 1μF capacitor between C2+ and C2-. 3 C2- Flying capacitor 2 negative terminal. 5 VIN Input voltage. Connect to ...

Page 3

Absolute Maximum Ratings Symbol Description V Input Voltage IN V Charge Pump Output OUT GND Voltage EN T Operating Junction Temperature Range J T Maximum Soldering Temperature (at leads, 10 sec) LEAD Thermal Information Symbol Description P ...

Page 4

Electrical Characteristics V = 3.3V 5.0V OUT IN Typical values are T = 25°C. A Symbol Description AAT3112-4.5 Input Power Supply V Operation Range IN I Quiescent Current Shutdown Current SHDN ...

Page 5

Typical Characteristics V = 3.5V 10μ OUT V vs 1.00 0.95 -40°C 0.90 0.85 25°C 0.80 0.75 0.70 85°C 0.65 0.60 0.55 0.50 2.0 2.5 3.0 3.5 4.0 Input Voltage ...

Page 6

Typical Characteristics-AAT3112-4. 3.5V 10μ OUT Output Voltage vs. Output Current 5.0 4 4.7 4.6 4 4.2V 4.4 IN 4.3 4.2 ...

Page 7

Typical Characteristics- AAT3112-4. 3.5V 10μ OUT Load Transient Response (V = 3.0V OUT (200mA/div) V OUT (20mV/div) Time (50µs/div) Input and Output Ripples (I = 50mA @ V OUT ...

Page 8

Typical Characteristics- AAT3112-4. 3.5V 10μ OUT Output Voltage vs. Input Voltage for Pulsed High Current (I = 500mA) OUT 5 50ms Pulse 4.5 4 3.5 500ms Pulse 3 2.5 2 1.5 ...

Page 9

Typical Characteristics- AAT3112-5. 3.5V 10μ OUT Output Voltage vs. Output Current 5.5 5.4 5.3 5.2 5.1 5.0 4.9 4.8 4.7 4.6 4 100 150 Output Current (mA) Startup Time ...

Page 10

Typical Characteristics- AAT3112-5. 3.5V 10μ OUT Load Transient Response (V = 3.0V OUT (200mA/div) V OUT (20mV/div) Time (50µs/div) Input and Output Ripples (I = 50mA @ V OUT ...

Page 11

Typical Characteristics- AAT3112-5. 3.5V 10μ OUT Output Voltage vs. Input Voltage for Pulsed High Current (I = 500mA) OUT 6 5 50ms Pulse 4 3 500ms Pulse 3.0 ...

Page 12

Functional Block Diagram VIN EN1 EN2 + Functional Description The AAT3112 is a dual charge pump intended for high-current applications. This device boosts an input voltage to a regulated output voltage. Regulation is achieved by sensing the ...

Page 13

Applications Information Charge Pump Efficiency The AAT3112 is a regulated output voltage dou- bling charge pump. The efficiency (η) can simply be defined as a linear voltage regulator with an effective output voltage that is equal to two times the ...

Page 14

Application Circuits PULSE 100ms - 500ms =10μF IN Light/Movie Mode Enable T PULSE Flash Enable Figure 2: Movie Mode Light with Flash Function. 14 500mA High Efficiency Charge Pump for White LED Flash ...

Page 15

... High Efficiency Charge Pump for White LED Flash Applications Marking Part Number (Tape and Reel) 1 LGXYY MNXYY QFN33-16 0.230 ± 0.050 Pin 1 Identification 1 C0.3 13 0.500 ± 0.050 Bottom View Side View 2 AAT3112IVN-4.5-T1 AAT3112IVN-5.0- 0.214 ± 0.036 15 ...

Page 16

Advanced Analogic Technologies, Inc. AnalogicTech cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in an AnalogicTech product. No circuit patent licenses, copyrights, mask work rights, or other intellectual property rights are implied. AnalogicTech reserves ...

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