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AAT3123

Features: Dual Mode 1x and 1.5x Charge Pump forMaximum EfficiencyDrives Low-V F& High-VF Type LEDsUp to 6 20mAOutputs32 Position Logarithmic Scale with Digital ControlSimple Serial Control™(S2Cwire™interfaceLow Noise Constant Frequency Operation1MHz Switching FrequencySmall Applica...

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SeekIC No. : 004261114 Detail

AAT3123: Features: Dual Mode 1x and 1.5x Charge Pump forMaximum EfficiencyDrives Low-V F& High-VF Type LEDsUp to 6 20mAOutputs32 Position Logarithmic Scale with Digital ControlSimple Serial Control™...

AAT3123 Data Sheet

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Part Number:
AAT3123
Supply Ability:
5000

Price Break

  • Qty
  • 1~5000
  • Unit Price
  • Negotiable
  • Processing time
  • 15 Days
Total Cost: $ 0.00

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Product Details

Description



Features:

Dual Mode 1x and 1.5x Charge Pump for
Maximum Efficiency
Drives Low-V F& High-VF Type LEDs
Up to 6 20mAOutputs
32 Position Logarithmic Scale with Digital Control
Simple Serial Control™(S2Cwire™interface
Low Noise Constant Frequency Operation
1MHz Switching Frequency
Small Application Circuit
Regulated Output Current
Automatic Soft-Start
VINRange: 2.7V to 5.5V
No Inductors
Iq < 1Ain Shutdown
Temperature Range -40 to 85°C
16 pin 4x4 QFN package (AAT3124)
12 pin TSOPJW-12 package (AAT3123)




Application

White LED Backlighting
White Photo-Flash for DSCs
Color (RGB) Lighting
Programmable Current Source




Specifications

Symbol Description Value Units
VIN Input Voltage -0.3 to 6 V
VOUT
 Charge Pump Output -0.3 to 6 V
VEN/SET EN/SETto GND Voltage -0.3 to 6 V
VEN/SET(MAX) Maximum EN/SETto Input Voltage 0.3 V
IOUT2 Maximum DC Output Current 150 mA
TJ Operating Junction Temperature Range -40 to 150 °C





Description

The AAT3123/24 is a low noise, constant frequen-cy charge pump DC/DC converter that uses a dualmode Load Switch (1X) and fractional (1.5X) con-version to maximize efficiency for White LED appli-cations. The device can be used to produce currentlevels up to 20mAto drive up to 6 LEDs from a 2.7V to 5.5V input. Outputs may be operated indi- vidually or paralleled for driving higher-current LEDs. Low external parts counts (two 1F flying capacitors and two small 1F capacitors at VIN ,and OUT) make the AAT3123/24 ideally suited for small battery-powered applications.






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