LTC3521

RECOMMENDED FOR NEW DESIGNS

1A Buck-Boost DC/DC and Dual 600mA Buck DC/DC Converters

Data Sheet Product Selection Table
Part Models
8
1ku List Price
Starting From $3.89
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Part Details

  • Three High Efficiency DC/DC Converters:
    • Buck-Boost (VOUT: 1.8V to 5.25V, IOUT: 1A)
    • Dual Buck (VOUT: 0.6V to VIN, IOUT: 600mA)
  • 1.8V to 5.5V Input Voltage Range
  • Pin-Selectable Burst Mode® Operation
  • 30μA Total Quiescent Current in Burst Mode Operation
  • Independent Power Good Indicator Outputs
  • Integrated Soft-Start
  • Thermal and Overcurrent Protection
  • <2μA Current in Shutdown
  • Small 4mm × 4mm QFN and Thermally Enhanced TSSOP Packages
LTC3521
1A Buck-Boost DC/DC and Dual 600mA Buck DC/DC Converters
Efficiency vs VIN Product Package 1 Product Package 2
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Documentation

Data Sheet 1

Reliability Data 1

User Guide 1

Data Sheet

This is the most up-to-date revision of the Data Sheet.

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Tools & Simulations

LTspice 2

Models for the following parts are available in LTspice:

  • LTC3521
LTspice

LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.

Evaluation Kits

eval board
schematic 1
schematic 2
schematic 3
schematic 4
DC1389A

LTC3521EUF Demo Board | Buck-Boost Plus Dual Buck, 2.4V ≤ VIN ≤ 5V, VOUT1 = 3.3V @ 0.8A, VOUT2 = 1.2V @ 0.6A, VOUT3 = 1.8V @ 0.6A

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Product Details

Demonstration circuit 1389A is high efficiency triple output DC/DC power supply featuring the LTC3521. The IC includes a 4-switch synchronous Buck-Boost DC/DC converter with a 1A switch rating and two synchronous 600mA Buck converters. The demo board accepts an input voltage between 2.4V and 5V, and provides fixed output voltages of 3.3V @800mA for the Buck-Boost converter and 1.2V & 1.8V @600mA for the Buck converters.
DC1389A
LTC3521EUF Demo Board | Buck-Boost Plus Dual Buck, 2.4V ≤ VIN ≤ 5V, VOUT1 = 3.3V @ 0.8A, VOUT2 = 1.2V @ 0.6A, VOUT3 = 1.8V @ 0.6A
DC1389A Evaluation Board DC1389A Evaluation Board - Top View DC1389A Evaluation Board - Bottom View DC1389A - Schematic

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