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Pump IC. AAT3170 Datasheet

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Pump IC. AAT3170 Datasheet






AAT3170 IC. Datasheet pdf. Equivalent




AAT3170 IC. Datasheet pdf. Equivalent





Part

AAT3170

Description

High Current LED Flash Driver Charge Pump IC



Feature


www.DataSheet4U.com High Current LED Fl ash Driver Charge Pump IC General Descr iption The AAT3170 is a high output cur rent, high efficiency, low noise, low p rofile charge pump DC/DC converter, ide al for multi-function LED photo-flash a pplications where solution cost, size, and efficiency are critical. The dual c harge pump in the AAT3170 is capable of delivering 600mA .
Manufacture

ANALOGICTECH

Datasheet
Download AAT3170 Datasheet


ANALOGICTECH AAT3170

AAT3170; output current. Two currentcontrolled pa ths are available for users of dual fla sh LEDs that prefer current matching. E ach LED channel can be easily programme d in 32 steps with a single GPIO output through the AS2Cwire™ (Advanced Simp le Serial Control™) interface. This a llows smooth transitions and flexible a djustment of brightness in flash or oth er lighting modes. The.


ANALOGICTECH AAT3170

tri-mode (1X/1.5X/2X) operation of the internal charge pump offers excellent p ower efficiency for both flash and movi e modes. Combined with a low external p arts count (two 1µF flying capacitors and one small bypass capacitor at VIN a nd OUT), the AAT3170 is ideally suited for small, battery-powered applications . The AAT3170 has a thermal management system to protect t.


ANALOGICTECH AAT3170

he device in the event of a short-circui t condition at the output pin. Built-in soft-start circuitry prevents excessiv e inrush current during start-up. The s hutdown feature disconnects the load fr om VIN and reduces quiescent current to less than 1.0µA. The AAT3170 is avail able in the Pb-free, thermallyenhanced, 12-pin 3x3mm TDFN package. AAT3170 F eatures • • • • • •.

Part

AAT3170

Description

High Current LED Flash Driver Charge Pump IC



Feature


www.DataSheet4U.com High Current LED Fl ash Driver Charge Pump IC General Descr iption The AAT3170 is a high output cur rent, high efficiency, low noise, low p rofile charge pump DC/DC converter, ide al for multi-function LED photo-flash a pplications where solution cost, size, and efficiency are critical. The dual c harge pump in the AAT3170 is capable of delivering 600mA .
Manufacture

ANALOGICTECH

Datasheet
Download AAT3170 Datasheet




 AAT3170
www.DataSheet4U.com
AAT3170
High Current LED Flash Driver Charge Pump IC
General Description
Features
ChargePump
The AAT3170 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 AAT3170 is capable
of delivering 600mA output current. Two current-
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
AAT3170 is ideally suited for small, battery-powered
applications.
The AAT3170 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 AAT3170 is available in the Pb-free, thermally-
enhanced, 12-pin 3x3mm TDFN package.
• VIN Range: 2.7V to 5.5V
• 600mA Output Current
• Tri-Mode 1X/1.5X/2X in Current Mode
• Voltage Mode Operation: 1.5X, 200mA
• 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 3x3mm Package
• -40°C to +85°C Temperature Range
Applications
• Camera Phones
• Digital Still Cameras (DSCs)
• PDAs and Notebook PCs
• Smart Phones
Typical Application
C1 C2
1µF 1µF
2.7V to 5.5V
C1+
VIN
C1- C2+ C2-
VOUT
CIN
4.7µF
AAT 3170
COUT
2.2µF
Flash
LED 1
EN/SET
CT
0.1µF
EN/SET
CT
GND
F1
F2
Flash
LED 2
3170.2006.10.1.0
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1




 AAT3170
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AAT3170
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
CT
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.
Flash timer control capacitor input. Connect a 100nF capacitor from CT to GND for a one
second timeout duration.
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 CT
7 EN/SET
2
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3170.2006.10.1.0




 AAT3170
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AAT3170
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
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
700
-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.
3170.2006.10.1.0
3
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