LTC3839

RECOMMENDED FOR NEW DESIGNS

Fast, Accurate, 2-Phase, Single-Output Step-Down DC/DC Controller with Differential Output Sensing

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Part Models
4
1ku List Price
Starting From $3.81
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Part Details

  • Wide VIN Range: 4.5V to 38V, VOUT: 0.6V to 5.5V
  • ±0.67% Output Voltage Accuracy Over Temperature, Differential Output Voltage Sensing, Allowing Up to ±500mV Line Loss at Remote Ground
  • Controlled On-Time, Valley Current Mode Control
  • Fast Load Transient Response
  • Detect Transient (DTR) Reduces VOUT Overshoot
  • Frequency Programmable from 200kHz to 2MHz, Synchronizable to External Clock
  • tON(MIN) = 30ns, tOFF(MIN) = 90ns
  • Up to 12-Phase Operation
  • RSENSE or Inductor DCR Current Sensing
  • Overvoltage Protection and Current Limit Foldback
  • Power Good Output Voltage Monitor
  • Output Voltage Tracking and Adjustable Soft Start-Up
  • Thermally Enhanced 32-Pin (5mm × 5mm) QFN Package
LTC3839
Fast, Accurate, 2-Phase, Single-Output Step-Down DC/DC Controller with Differential Output Sensing
3.3V/25A Output, 2MHz Step-Down Converter (Refer to Figure 20 for Full Design) Efficiency/Power Loss Product Package 1
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Documentation

Data Sheet 1

Reliability Data 1

User Guide 1

Application Note 1

Technical Articles 2

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
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
LT4363
RECOMMENDED FOR NEW DESIGNS High Voltage Surge Stopper with Current Limit
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Tools & Simulations

LTspice 3

Models for the following parts are available in LTspice:

  • LTC3839

LTpowerCAD 2

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.

LTpowerCAD

LTpowerCAD® is a power supply design program which selects power stage components, provides detailed power efficiency, shows quick loop Bode plot stability and load transient analysis, and can export to LTspice for simulation.

Evaluation Kits

eval board
schematic 1
DC1632A

LTC3839EUH Demo Board | VIN = 4.5V to 14V, VOUT = 1.5V @ 40A

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Product Details

Demonstration circuit 1632A is a single output 1.5V/40A dual phase synchronous buck converter operating with a switching frequency of 300kHz over an input voltage range of 4.5V to 14V. The controlled on-time valley current mode architecture of the LTC3839 allows for a fast load step response.
DC1632A
LTC3839EUH Demo Board | VIN = 4.5V to 14V, VOUT = 1.5V @ 40A
DC1632A - Schematic

Latest Discussions

3 Years Ago
RE: LTC3728's Parallel Operation
4 Years Ago
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