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PDF AAT3112 Data sheet ( Hoja de datos )
| Número de pieza | AAT3112 | |
| Descripción | High Efficiency Charge Pump | |
| Fabricantes | AAT | |
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AAT3112
500mA High Efficiency Charge Pump
for White LED Flash Applications
General Description
Features
ChargePump™
The AAT3112 is a member of AnalogicTech's Total
• Input Voltage Range:
Power Management IC™ (TPMIC™) family. It is a
— AAT3112-5.0: 2.7V to 5.0V
dual voltage doubling charge pump that provides a
— AAT3112-4.5: 2.7V to 4.5V
regulated output voltage. It operates with an input
• Up to 500mA Peak Output Current
voltage range of 2.7 to 5.0 volts. The device can
• 200mA Continuous Output Current
deliver a constant 200mA output load current and up
to 500mA of pulsed current. The 500mA peak cur-
• IQ <1μA in Shutdown
• Regulated 4.5V or 5.0V Output
rent capability of the AAT3112 makes it ideal for
• 26μA of Quiescent Current
white LED flash applications. A low external parts
• Small Application Circuit
count (two 1μF flying capacitors and two small
• Automatic Soft Start
capacitors at VIN and VOUT) makes the AAT3112 ide-
ally suited for small battery-powered applications.
• No Inductors
• Short-Circuit/Over-Temperature Protection
The AAT3112 has a thermal management system
to protect the device in the event of a short-circuit
• 16-Pin 3x3mm QFN Package
• Temperature Range: -40°C to +85°C
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.
Applications
A low current shutdown feature disconnects the
load from VIN and reduces quiescent current to less
than 1μA. The AAT3112 is available in a Pb-free
16-pin 3x3mm QFN package and is rated over thewww.DataSheet4U.com
•
•
•
General-Purpose High-Current Boost Supply
White LED Backlighting
White LED Photo Flash
-40°C to +85°C temperature range.
Typical Application
VIN
CIN
Enable Light
Enable Flash
C1 = 1μF C2 = 1μF
C1+ C1- C2+ C2-
VIN VOUT1
VOUT2
AAT3112
EN1
EN2
GND
C OUT
D1 D2 D3 D4
RB
3112.2007.01.1.5
1
1 page  
AAT3112
500mA High Efficiency Charge Pump
for White LED Flash Applications
Typical Characteristics
VIN = 3.5V, CIN = COUT = 10μF, C1 = C2 = 1μF; TA = 25°C, unless otherwise noted.
VIN vs. VIH
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 4.5 5.0 5.5
Input Voltage (V)
VIN vs. VIL
1.00
0.95
0.90
0.85 -40°C
0.80 25°C
0.75
0.70
0.65 85°C
0.60
0.55
0.50
2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5
Input Voltage (V)
VSHDN Threshold vs. Input Voltage
1.00
0.95
0.90
0.85
0.80
VIH
0.75
0.70
0.65
VIL
0.60
0.55
0.50
2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5
Input Voltage (V)
3112.2007.01.1.5
5
5 Page 
AAT3112
500mA High Efficiency Charge Pump
for White LED Flash Applications
Typical Characteristics- AAT3112-5.0V
VIN = 3.5V, CIN = COUT = 10μF, C1 = C2 = 1μF; TA = 25°C, unless otherwise noted.
Output Voltage vs. Input Voltage for
Pulsed High Current
(IOUT = 500mA)
6
5
50ms Pulse
4
3
500ms Pulse
2
1
0
3.0 3.2 3.4 3.6 3.8 4.0 4.2
Input Voltage (V)
3112.2007.01.1.5
11
11 Page | ||
| Páginas | Total 16 Páginas | |
| PDF Descargar | [ Datasheet AAT3112.PDF ] | |
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