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Sky Works AAT2713

Low Noise, Dual 600mA Step-Down Converter with Synchronization

Overview

TopologyBuck Converter
Input voltage2.7-5.5 V
Output 13.3 V / 0.6 A

Description

The AAT2713 is a high efficiency dual synchronous stepdown converter for applications where power efficiency, thermal performance and solution size are critical. Input voltage ranges from 2.7V to 5.5V, making it ideal for systems powered by single-cell lithium-ion/polymer batteries.The AAT2713 incorporates a unique low noise architecture which reduces ripple and spectral noise.

Each converter is capable of 600mA output current and has its own enable pin. Efficiency of the converters is optimized over full load range. Total no load quiescent current is 70μA, allowing high efficiency even under light load conditions.

The integrated power switches are controlled by pulse width modulation (PWM) with a 1.7MHz typical switching frequency at full load, which minimizes the size of external components. Fixed frequency, low noise operation can be forced by a logic signal on the MODE pin. Furthermore, an external clock can be used to synchronize the switching frequency of both converters.

A phase shift pin (PS) is available to operate the two converters 180° out of phase at heavy load to achieve low input ripple.

The AAT2713 is available in a Pb-free, thermally enhanced 16-pin QFN33 package and is specified for operation over the -40°C to +85°C temperature range.

Features

  • VIN Range: 2.7V to 5.5V
  • Low Noise Light Load Mode
  • Low Ripple PWM Mode
  • Output Current:
  • Channel 1: 600mA
  • Channel 2: 600mA
  • 96% Efficient Step-Down Converter
  • Low No Load Quiescent Current
  • 70μA Total for Both Converters
  • Integrated Power Switches
  • 100% Duty Cycle
  • 1.7MHz Switching Frequency
  • Optional Fixed Frequency or External SYNC
  • Logic Selectable 180° Phase Shift Between the Two Converters
  • Current Limit Protection
  • Automatic Soft-Start
  • Over-Temperature Protection
  • QFN33-16 Package
  • -40°C to +85°C Temperature Range

Remarks:

  • Refer page num 13 for more inductor values.

Typical applications

  • Digital Cameras
  • Handheld Instruments
  • PDAs and Handheld Computers
  • Cellular Phones / Smart Phones
  • Microprocessor / DSP Core / IO Power
  • Micro Hard Disc Drives

Products

Order Code Data­sheet Downloads Product seriesL
(µH)
IR
(A)
ISAT
(A)
RDC typ.
(mΩ)
fres
(MHz)
Mount Samples
744028004
STE ALT EAG CAD LTS PSP SPE IGS CADWE-TPC SMT Tiny Power Inductor 4.7 0.85 0.7 265 70 SMT
Order Code Data­sheet
744028004
Samples
Order Code Data­sheet Downloads Product seriesL
(µH)
IR
(A)
ISAT
(A)
RDC typ.
(mΩ)
fres
(MHz)
Mount Samples