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Pump IC. AAT3175 Datasheet

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Pump IC. AAT3175 Datasheet






AAT3175 IC. Datasheet pdf. Equivalent




AAT3175 IC. Datasheet pdf. Equivalent





Part

AAT3175

Description

High Current LED Flash Driver Charge Pump IC



Feature


www.DataSheet4U.com AAT3175 High Effici ency 1X/1.5X/2X Charge Pump For White L ED Flash Applications General Descripti on The AAT3175 is a low noise, constant frequency charge pump DC/DC converter that uses a tri-mode load switch (1X), fractional (1.5X), and doubling (2X) co nversion to maximize efficiency for whi te LED flash applications. The AAT3175 is capable of driv.
Manufacture

ANALOGICTECH

Datasheet
Download AAT3175 Datasheet


ANALOGICTECH AAT3175

AAT3175; ing up to three flash LEDs at 300mA tota l current from a 2.7V to 5.5V input. A low external parts count (two 1µF flyi ng capacitors and two small 1µF capaci tors at VIN and VOUT) make this part id eally suited for small battery-powered applications. AnalogicTech's S2Cwire™ (Simple Serial Control™) serial digi tal input is used to enable, disable, a nd set current for all L.


ANALOGICTECH AAT3175

EDs with 16 level settings down to 0. Th e AAT3175 is equipped with built-in pro tection for VOUT short-circuit conditio n and auto-disable for load short-circu it condition on any one of the channels . Built-in soft-start circuitry prevent s excessive inrush current during start -up. A low-current shutdown feature dis connects the load from VIN and reduces quiescent current .


ANALOGICTECH AAT3175

to less than 1µA. The AAT3175 is availa ble in a Pb-free, space-saving, thermal ly-enhanced 12-pin 3x3mm TDFN package. Features • • • • • • • • • • • ChargePump™ VIN Range: 2.7V to 5.5V Up to 300mA Total F lash Current Fully Programmable Current with Single Wire — 16 Logarithmic Cu rrent Levels Tri-Mode 1X, 1.5X, and 2X Charge Pump for Maximum Efficiency and VF Cover.

Part

AAT3175

Description

High Current LED Flash Driver Charge Pump IC



Feature


www.DataSheet4U.com AAT3175 High Effici ency 1X/1.5X/2X Charge Pump For White L ED Flash Applications General Descripti on The AAT3175 is a low noise, constant frequency charge pump DC/DC converter that uses a tri-mode load switch (1X), fractional (1.5X), and doubling (2X) co nversion to maximize efficiency for whi te LED flash applications. The AAT3175 is capable of driv.
Manufacture

ANALOGICTECH

Datasheet
Download AAT3175 Datasheet




 AAT3175
www.DataSheet4U.com
AAT3175
High Efficiency 1X/1.5X/2X Charge Pump
For White LED Flash Applications
General Description
The AAT3175 is a low noise, constant frequency
charge pump DC/DC converter that uses a tri-mode
load switch (1X), fractional (1.5X), and doubling
(2X) conversion to maximize efficiency for white
LED flash applications. The AAT3175 is capable of
driving up to three flash LEDs at 300mA total cur-
rent from a 2.7V to 5.5V input. A low external parts
count (two 1µF flying capacitors and two small 1µF
capacitors at VIN and VOUT) make this part ideally
suited for small battery-powered applications.
AnalogicTech's S2Cwire™ (Simple Serial Control™)
serial digital input is used to enable, disable, and
set current for all LEDs with 16 level settings down
to 0.
The AAT3175 is equipped with built-in protection
for VOUT short-circuit condition and auto-disable for
load short-circuit condition on any one of the chan-
nels. Built-in soft-start circuitry prevents excessive
inrush current during start-up. A low-current shut-
down feature disconnects the load from VIN and
reduces quiescent current to less than 1µA.
The AAT3175 is available in a Pb-free, space-saving,
thermally-enhanced 12-pin 3x3mm TDFN package.
Features
ChargePump
• VIN Range: 2.7V to 5.5V
• Up to 300mA Total Flash Current
• Fully Programmable Current with Single Wire
— 16 Logarithmic Current Levels
• Tri-Mode 1X, 1.5X, and 2X Charge Pump for
Maximum Efficiency and VF Coverage
• Drives 3-in-1 or 2-in-1 Flash LEDs
— 0.5% Current Matching
• No Inductors, Low Noise Operation
• 1MHz Constant Switching Frequency
• Small Application Circuit
• Built-In Thermal Protection
• Automatic Soft-Start
• IQ <1µA in Shutdown
• TDFN33-12 Package
Applications
• Programmable Current Sinks
• White LED Backlighting
• White Photo Flash for Mobile Phones
Typical Application
C1
1µF
2.7V to 5.5V
CIN
1µF
EN/SET
C1+ C2+
C1- C2-
VIN VOUT
AAT3175
GND
EN/SET
D1
D2
D3
D4
D1 D2 D3
COUT
1µF
3175.2006.01.1.2
1




 AAT3175
AAT3175
High Efficiency 1X/1.5X/2X Charge Pump
For White LED Flash Applications
Pin Descriptions
Pin #
1
2
3
4
5
6
7
8
9
10
11
12
EP
Symbol
D4
EN/SET
C1+
C1-
VOUT
C2+
C2-
VIN
GND
D1
D2
D3
Function
Current sink input #4; 100mA max.
S2Cwire serial interface control pin.
Flying capacitor 1 positive terminal. Connect a 1µF capacitor between C1+ and C1-.
Flying capacitor 1 negative terminal.
Charge pump output to drive load circuit. Requires 1µF capacitor connected between
this pin and ground.
Flying capacitor 2 positive terminal. Connect a 1µF capacitor between C2+ and C2-.
Flying capacitor 2 negative terminal.
Input power supply. Requires 1µF capacitor connected between this pin and ground.
Ground.
Current sink input #1; 100mA max.
Current sink input #2; 50mA max.
Current sink input #3; 50mA max.
Exposed paddle (bottom). Connect to GND directly beneath package.
Pin Configuration
TDFN33-12
(Top View)
D4 1
EN/SET 2
C1+ 3
C1- 4
VOUT 5
C2+ 6
12 D3
11 D2
10 D1
9 GND
8 VIN
7 C2-
2 3175.2006.01.1.2




 AAT3175
AAT3175
High Efficiency 1X/1.5X/2X Charge Pump
For White LED Flash Applications
Absolute Maximum Ratings1
Symbol
VIN
VEN/SET
IOUT2
TJ
TLEAD
Description
Input Voltage
EN/SET to GND Voltage
Maximum DC Output Current
Operating Junction Temperature Range
Maximum Soldering Temperature (at leads, 10 sec)
Value
-0.3 to 6
-0.3 to VIN + 0.3
300
-40 to 150
300
Units
V
V
mA
°C
°C
Thermal Information3
Symbol
PD
θJA
Description
Maximum Power Dissipation4
Maximum Thermal Resistance
Value
2.0
50
Units
W
°C/W
1. Stresses above those listed in Absolute Maximum Ratings may cause permanent damage to the device. Functional operation at conditions
other than the operating conditions specified is not implied. Only one Absolute Maximum Rating should be applied at any one time.
2. Based on long-term current density limitation.
3. Mounted on an FR4 board.
4. Derate 20mW/°C above 25°C.
3175.2006.01.1.2
3



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