LT3844

PRODUCTION

High Voltage, Current Mode Switching Regulator Controller with Programmable Operating Frequency

Data Sheet Product Selection Table
Part Models
4
1ku List Price
Starting From $3.72
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Part Details

  • High Voltage Operation: Up to 60V
  • Output Voltages up to 36V (Step-Down)
  • Programmable Constant Frequency: 100kHz to 500kHz
  • Synchronizable up to 600kHz
  • Burst Mode® Operation: 120µA Supply Current
  • 10µA Shutdown Supply Current
  • ±1.3% Reference Accuracy
  • Drives N-Channel MOSFET
  • Programmable Soft-Start
  • Programmable Undervoltage Lockout
  • Internal High Voltage Regulator for Gate Drive
  • Thermal Shutdown
  • Current Limit Unaffected by Duty Cycle
  • 16-Pin Thermally Enhanced TSSOP Package
LT3844
High Voltage, Current Mode Switching Regulator Controller with Programmable Operating Frequency
High Voltage Step-Down Regulator 48V to 12V, 50W Efficiency and Power Loss vs Load Current Product Package 1
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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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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
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:

  • LT3844
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
DC974A

LT3844EFE Demo Board | 15V ≤ VIN ≤ 60V, VOUT = 12V @ 4.2A

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Product Details

Demonstration Circuit 974 is a 100kHz to -500kHz programmable frequency, high voltage, current-mode DC/DC step-down converter featuring the LT3844. The operating frequency can be synchronized up to 600kHz. The board operates from a Vin range of 15V to -60V and outputs 12VOUT @ 4.2A (50W).
DC974A
LT3844EFE Demo Board | 15V ≤ VIN ≤ 60V, VOUT = 12V @ 4.2A
DC974A - Schematic

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