LTC3865
LTC3865-1

PRODUCTION

Dual, 2-Phase Synchronous DC/DC Controller with Pin Selectable Outputs

Part Models
12
1ku List Price
Starting From $3.19
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Part Details

  • Dual, 180° Phased Controllers
  • 2-Pin VID Output Voltage Programming from 0.6V to 5V
  • High Efficiency: Up to 95%
  • RSENSE or DCR Current Sensing
  • Phase-Lockable Fixed Frequency 250kHz to 770kHz
  • Adjustable Current Limit
  • Dual N-Channel MOSFET Synchronous Drive
  • Wide VIN Range: 4.5V to 38V Operation
  • Adjustable Soft-Start Current Ramping or Tracking
  • Output OV Protection With Reverse Current Limit
  • Power Good Output Voltage Monitor
  • 32-Pin 5mm × 5mm QFN and 38-Lead TSSOP Packages
LTC3865
LTC3865-1
Dual, 2-Phase Synchronous DC/DC Controller with Pin Selectable Outputs
High Efficiency 1.5V/15A, 1.2V/15A Step-Down Converter Efficiency and Power Loss  vs Load Current Product Package 1 Product Package 2 Product Package 3
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Documentation

Data Sheet

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Software Resources

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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
Multiple Output Buck Regulators 1
LTC3880 RECOMMENDED FOR NEW DESIGNS Dual Output PolyPhase Step-Down DC/DC Controller with Digital Power System Management
Surge Stopper, Overvoltage, and Overcurrent Protection 1
LTC4365 RECOMMENDED FOR NEW DESIGNS Overvoltage, Undervoltage and Reverse Supply Protection Controller
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Tools & Simulations

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
DC1480A

LTC3865EUH-1 Demo Board | 4.5V ≤ VIN ≤ 14V, VOUT1 = 3.3V @ 5A, VOUT2 = 1.8V @ 5A

Product Details

Demonstration circuit 1480A is a dual output synchronous buck DC/DC converter featuring the LTC3865EUH-1. The input voltage range is from 4.5V to 14V. The default outputs are 3.3V/5A and 1.8V/5A, but pin programming allows each output to be set at 5V, 3.3V, 2.5V, 1.8V, 1.5V, 1.2V, 1.1V, 1V or an adjustable voltage.

eval board
DC1479A

LTC3865EUH Demo Board | 4.5V ≤ VIN ≤ 14V, VOUT1 = 1.5V @ 15A, VOUT2 = 1.2V @ 15A

Product Details

Demonstration circuit 1479A is a dual output synchronous buck DC/DC converter featuring the LTC3865EUH. The input voltage range is from 4.5V to 14V. The outputs are 1.5V/15A and 1.2V/15A. Each output voltage can be precisely programmed to a preset value within 1% error using two 3-state programming pins. The output voltage can be set to 1.0V, 1.1V, 1.2V, 1.5V, 1.8V, 2.5V 3.3V or 5V. The LTC3865 differs from the LTC3865-1 in that the "-1" has a fixed current limit threshold. The 32-pin package options for both devices have no SGND pin and only one PGND pin.

DC1480A
LTC3865EUH-1 Demo Board | 4.5V ≤ VIN ≤ 14V, VOUT1 = 3.3V @ 5A, VOUT2 = 1.8V @ 5A
DC1480A - Schematic
DC1479A
LTC3865EUH Demo Board | 4.5V ≤ VIN ≤ 14V, VOUT1 = 1.5V @ 15A, VOUT2 = 1.2V @ 15A
DC1479A - Schematic

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