AAT3172 Buy Now
High Current LED Flash Driver Charge Pump IC

The AAT3172 is a high output current, high efficiency, low noise, low profile charge pump DC/DC converter, ideal for multi-function LED photo-flash applications where solution cost, size, and efficiency are critical.

The dual charge pump in the AAT3172 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 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 condition 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 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, 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 3x3mm Package
  • -40°C to +85°C Temperature Range
Data Sheets AAT3172 Data Sheet 202099A.pdf (951 KB)
Application Notes AAT3172 Flash Programming Techniques Using the AS²Cwireâ„¢ Serial Interface AATI_AN_61.pdf (1045 KB)
Designer Info AAT3172 Evaluation Board Datasheet AATI_AN_62.pdf (177 KB)
Designer Info AAT3172 Block Diagram AATI_BD_184.jpg (32 KB)
Designer Info AAT3172 Gerber File AATI_Gerber_184.zip (51 KB)
ProductName : AAT3172
Flash IOUT Total (mA) : 600
Movie Mode IOUT Total (mA) : 100
LED Channels : 2
Min. VIN (V) : 2.7
Max. VIN (V) : 5.5
Max. VOUT (V) : 4.9
Interface : AS2Cwire™
Max. Shutdown Current (μA) : 1
Typ. IQ (μA) : 300
Peak Efficiency : 93%
Package : TDFN33-12
Package (mm) : TDFN 12L, 3 x 3 x 0.75
Product Information:
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