LT3570

PRODUCTION

1.5A Buck Converter, 1.5A Boost Converter and LDO Controller

Data Sheet Product Selection Table
Part Models
8
1ku List Price
Starting From $3.54
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Part Details

  • 2.5V to 36V Input Voltage Range
  • Programmable Switching Frequency from 500kHz to 2.1MHz
  • Synchronizable Up to 2.75MHz
  • VOUT(MIN): 0.8V
  • Independent Soft-Start for Each Converter
  • Separate VIN Supplies for Each Converter
  • Duty Cycle Range: 0% to 90% at 1MHz
  • Available in 24-Lead (4mm × 4mm) QFN and 20-Lead TSSOP Packages
LT3570
1.5A Buck Converter, 1.5A Boost Converter and LDO Controller
Efficiency Product Package 1 Product Package 2
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Documentation

Data Sheet 1

Reliability Data 1

User Guide 1

Technical Articles 1

Data Sheet

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

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Hardware Ecosystem

Parts Product Life Cycle Description
Digital Power System Managers 1
LTC2974
RECOMMENDED FOR NEW DESIGNS 4-Channel PMBus Power System Manager Featuring Accurate Output Current Measurement
Dual-Supply Monitors 1
LTC2960
RECOMMENDED FOR NEW DESIGNS 36V Nano-Current Two-Input Voltage Monitor
Silicon Oscillators 1
LTC6909
PRODUCTION 1 to 8 Output, Multiphase Silicon Oscillator with Spread Spectrum Modulation
Surge Stopper, Overvoltage, and Overcurrent Protection 1
LT4363
RECOMMENDED FOR NEW DESIGNS High Voltage Surge Stopper with Current Limit
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Tools & Simulations

LTspice 2

Models for the following parts are available in LTspice:

  • LT3570
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
DC1106A

LT3570EUF Demo Board | Buck + Boost + LDO Controller, 4V to 36VIN Buck with VOUT1 = 3.3V@1A, 3.3V to 10VIN Boost with VOUT2 = 12V@275mA, 100mA LDO

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Product Details

Demonstration circuit 1106 is a 1.5A Buck Converter, 1.5A Boost Converter, and LDO Controller featuring the LT3570. The Buck is designed to convert a 4V to 36V source to 3.3V at 1A. The LDO is powered from the output of the buck and converts 3.3V to 2.5V at 100mA. The boost converts a 3.3V to 10V source to 12V at 275mA.
DC1106A
LT3570EUF Demo Board | Buck + Boost + LDO Controller, 4V to 36VIN Buck with VOUT1 = 3.3V@1A, 3.3V to 10VIN Boost with VOUT2 = 12V@275mA, 100mA LDO
DC1106A - Schematic

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