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AAT3112IVN-4.5-T1
EEWorld咨询电话：82357002，82350740－8068 邮件咨询：datasheet@eeworld.com.cn 器件描述：500mA High Efficiency Charge Pump for White LED Flash Applications 器件厂商：ANALOGICTECH [Advanced Analogic Technologies] 厂商主页：http://www.analogictech.com/ 文件大小：354.31KB 文件页数：16 PDF阅读：AAT3112IVN-4.5-T1.pdf (点击阅读器件资料) 摘要： AAT3112 500mA High Efficiency Charge Pump for White LED Flash Applications Typical Application AAT3112 C1 + C1 - C2 + C2 - C1 = 1?F C2 = 1?F EN1 EN2 Enable Light Enable Flash D1 D2 D3 D4 V OUT1 V IN V OUT2 C OUT R BGND C IN V IN 3112.2004.12.1.2 1 ChargePump ? 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 1?F flying capacitors and two small capacitors at V IN and V OUT ) makes the AAT3112 ide- 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. A high charge pump switching frequency enables the use of very small external capacitors. A low current shutdown feature disconnects the load from V IN and reduces quiescent current to less than 1?A. The AAT3112 is available in a 16-pin 3x3mm QFN package and is rated over the -40°C to +85°C temperature range. Features ? 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 Q <1?A in Shutdown ? Regulated 4.5V or 5.0V Output ? 26?A 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 Applications ? General-Purpose High-Current Boost Supply ? White LED Backlighting ? White LED Photo Flash 相关器件：AAT3112IVN-5.0-T1 AAT3112

AAT3112IVN-4.5-T1

EEWorld咨询电话：82357002，82350740－8068 邮件咨询：datasheet@eeworld.com.cn

器件描述：500mA High Efficiency Charge Pump for White LED Flash Applications
器件厂商：ANALOGICTECH [Advanced Analogic Technologies]
厂商主页：http://www.analogictech.com/
文件大小：354.31KB
文件页数：16
PDF阅读：AAT3112IVN-4.5-T1.pdf (点击阅读器件资料)

摘要：
AAT3112
500mA High Efficiency Charge Pump
for White LED Flash Applications
Typical Application
AAT3112
C1
+
C1
-
C2
+
C2
-
C1 = 1?F C2 = 1?F
EN1
EN2
Enable Light
Enable Flash
D1 D2 D3 D4
V
OUT1
V
IN
V
OUT2
C
OUT
R
BGND
C
IN
V
IN
3112.2004.12.1.2 1
ChargePump
?
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 1?F flying capacitors and two small
capacitors at V
IN
and V
OUT
) makes the AAT3112 ide-
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. A high charge pump switching frequency
enables the use of very small external capacitors.
A low current shutdown feature disconnects the
load from V
IN
and reduces quiescent current to less
than 1?A. The AAT3112 is available in a 16-pin
3x3mm QFN package and is rated over the -40°C
to +85°C temperature range.
Features
? 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
Q
<1?A in Shutdown
? Regulated 4.5V or 5.0V Output
? 26?A 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
Applications
? General-Purpose High-Current Boost Supply
? White LED Backlighting
? White LED Photo Flash

相关器件：AAT3112IVN-5.0-T1 AAT3112

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