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Pump IC. AAT3172 Datasheet

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Pump IC. AAT3172 Datasheet






AAT3172 IC. Datasheet pdf. Equivalent




AAT3172 IC. Datasheet pdf. Equivalent





Part

AAT3172

Description

High Current LED Flash Driver Charge Pump IC



Feature


www.DataSheet4U.com AAT3172 High Curren t LED Flash Driver Charge Pump IC Gener al Description The AAT3172 is a high ou tput current, high efficiency, low nois e, low profile charge pump DC/DC conver ter, ideal for multi-function LED photo -flash applications where solution cost , size, and efficiency are critical. Th e dual charge pump in the AAT3172 is ca pable of deliverin.
Manufacture

ANALOGICTECH

Datasheet
Download AAT3172 Datasheet


ANALOGICTECH AAT3172

AAT3172; g 600mA peak output current. Two current -controlled paths are available for use rs of dual flash LEDs that prefer curre nt matching. Each LED channel can be ea sily programmed in 32 steps with a sing le GPIO output through the AS2Cwire™ (Advanced Simple Serial Control™) int erface. This allows smooth transitions and flexible adjustment of brightness i n flash or other light.


ANALOGICTECH AAT3172

ing modes. The tri-mode (1X/1.5X/2X) ope ration of the internal charge pump offe rs excellent power efficiency for both flash and movie modes. Combined with a low external parts count (two 1µF flyi ng capacitors and one small bypass capa citor at VIN and OUT), the AAT3172 is i deally suited for small, battery-powere d applications. The AAT3172 has a therm al management syste.


ANALOGICTECH AAT3172

m to protect the device in the event of a short-circuit condition at the output pin. Built-in soft-start circuitry pre vents excessive inrush current during s tart-up. The shutdown feature disconnec ts the load from VIN and reduces quiesc ent current to less than 1.0µA. The AA T3172 is available in the Pb-free, ther mallyenhanced, 12-pin 3x3 TDFN package. Features • • • • .

Part

AAT3172

Description

High Current LED Flash Driver Charge Pump IC



Feature


www.DataSheet4U.com AAT3172 High Curren t LED Flash Driver Charge Pump IC Gener al Description The AAT3172 is a high ou tput current, high efficiency, low nois e, low profile charge pump DC/DC conver ter, ideal for multi-function LED photo -flash applications where solution cost , size, and efficiency are critical. Th e dual charge pump in the AAT3172 is ca pable of deliverin.
Manufacture

ANALOGICTECH

Datasheet
Download AAT3172 Datasheet




 AAT3172
www.DataSheet4U.com
AAT3172
High Current LED Flash Driver Charge Pump IC
General Description
The AAT3172 is a high output current, high effi-
ciency, low noise, low profile charge pump DC/DC
converter, ideal for multi-function LED photo-flash
applications where solution cost, size, and efficien-
cy are critical.
The dual charge pump in the AAT3172 is capable
of delivering 600mA peak output current. Two cur-
rent-controlled paths are available for users of dual
flash LEDs that prefer current matching. Each LED
channel can be easily programmed in 32 steps with
a single GPIO output through the AS2Cwire™
(Advanced Simple Serial Control™) interface. This
allows smooth transitions and flexible adjustment
of brightness in flash or other lighting modes.
The tri-mode (1X/1.5X/2X) operation of the internal
charge pump offers excellent power efficiency for
both flash and movie modes. Combined with a low
external parts count (two 1µF flying capacitors and
one small bypass capacitor at VIN and OUT), the
AAT3172 is ideally suited for small, battery-powered
applications.
The AAT3172 has a thermal management system to
protect the device in the event of a short-circuit con-
dition at the output pin. Built-in soft-start circuitry
prevents excessive inrush current during start-up.
The shutdown feature disconnects the load from VIN
and reduces quiescent current to less than 1.0µA.
The AAT3172 is available in the Pb-free, thermally-
enhanced, 12-pin 3x3 TDFN package.
Features
ChargePump
• VIN Range: 2.7V to 5.5V
• 600mA Peak Output Current
• Tri-Mode 1X/1.5X/2X in Current Mode
• Voltage Mode Operation: 1.5X, 100mA
• Dual Regulated Current Sinks
• Current Match Between Current Sinks
• 32 Current Steps Set by AS2Cwire
• 1µF Input, Output, and Flying Capacitors
• <1.0µA of Shutdown
• Small Application Circuit
• No Inductors
• Automatic Soft Start
• 12-Pin TDFN 3x3 Package
• -40°C to +85°C Temperature Range
Applications
• Camera Phones
• Digital Still Cameras (DSCs)
• PDAs and Notebook PCs
• Smart Phones
Typical Application
2.7V to 5.5V
EN/SET
C1 C2
1µF 1µF
C1+ C1- C2+ C2-
VIN VOUT
CIN
4.7µF
AAT3172
COUT
2.2µF
Flash
LED 1
Flash
LED 2
EN/SET
GND
F1
F2
3172.2005.11.1.1
1




 AAT3172
AAT3172
High Current LED Flash Driver Charge Pump IC
Pin Descriptions
Pin #
1, 12
2
3
4
5
6
7
8
9
10
11
EP
Symbol
VIN
C1+
C1-
GND
F1
F2
EN/SET
N/C
C2-
C2+
VOUT
Function
Input power supply pin. Requires 4.7µF bypass capacitor to ground.
Flying capacitor C1 positive terminal. Connect a 1.0µF capacitor between C1+ and C1-.
Flying capacitor C1 negative terminal.
Ground connection.
Current sink input #1.
Current sink input #2.
AS2Cwire serial interface control pin.
No connection.
Flying capacitor C2 negative terminal.
Flying capacitor C2 positive terminal. Connect a 1µF capacitor between C2+ and C2-.
Charge pump output. Requires 2.2µF capacitor connected between this pin and ground.
Exposed paddle (bottom); connect to GND directly beneath package.
Pin Configuration
TDFN33-12
(Top View)
VIN 1
C1+ 2
C1- 3
GND 4
F1 5
F2 6
12 VIN
11 VOUT
10 C2+
9 C2-
8 N/C
7 EN/SET
2 3172.2005.11.1.1




 AAT3172
AAT3172
High Current LED Flash Driver Charge Pump IC
Absolute Maximum Ratings1
TA = 25°C, unless otherwise noted.
Symbol
VIN
VEN
VEN(MAX)
IOUT
TJ
TS
TLEAD
Description
Input Voltage
EN to GND Voltage
Maximum EN to Input Voltage
Maximum DC Output Current (continuous)
Operating Junction Temperature Range
Storage Temperature Range
Maximum Soldering Temperature (at leads, 10 sec)
Value
-0.3 to 6.0
-0.3 to 6.0
VIN + 0.3
400
-40 to 150
-65 to 150
300
Units
V
V
V
mA
°C
°C
°C
Thermal Information2
Symbol
θJA
PD
Description
Maximum Thermal Resistance
Maximum Power Dissipation
Value
50
2.0
Units
°C/W
W
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. Mounted on an FR4 board.
3172.2005.11.1.1
3



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