LTC3520 - Synchronous 1A Buck-Boost and 600mA Buck Converters

Features
  • Dual High Efficiency DC/DC Converters: Buck-Boost (VOUT: 2.2V to 5.25V, IOUT = 1A at VOUT = 3.3V, VIN ≥ 3V) Buck (VOUT: 0.8V to VIN, IOUT = 600mA)
  • 2.2V to 5.5V Input Voltage Range
  • Pin-Selectable Burst Mode® Operation
  • Uncommitted Gain Block for LDO Controller, Battery Good Indication or Sequencing
  • Programmable 100kHz to 2MHz Switching Frequency
  • 55μA Total Quiescent Current for Both Converters in Burst Mode Operation
  • Thermal and Overcurrent Protection
  • <1μA Quiescent Current in Shutdown
  • 24-Lead 4mm × 4mm QFN Package
Typical Application

Applications
  • Portable Media Players
  • Digital Cameras
  • Handheld PCs, PDAs
  • GPS Receivers
Packaging
Order Information
Part NumberPackageTempPrice(1-99)Price (1k)*
LTC3520EUF#PBF4x4 QFN-24E$5.00$3.50
LTC3520EUF#TRPBF4x4 QFN-24E$3.56
LTC3520IUF#PBF4x4 QFN-24I$5.76$4.03
LTC3520IUF#TRPBF4x4 QFN-24I$4.09
Demo Boards
Part NumberDescriptionPrice
DC1062ALTC3520EUF| Buck-Boost w/ 400mA Buck, Vin = 2.2V to 5.5V, Vout1 = 3.3V @ 1A (BB), Vout2 = 1.8V @ 0.6A, Vout3 (LDO Post Regulator) = 1.5V @ 200mA$125.00
Datasheet
Reliability Data
LT Journal
Press Release
Related Product
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LTC3520 Footprints and Symbols