LT3681

PRODUCTION

36V, 2A, 2.8MHz Step-Down Switching Regulator with Integrated Power Schottky Diode

Part Models
2
1ku List Price
Starting From $4.37
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Part Details

  • Wide Input Voltage Range: 3.6V to 34V Operating, 36V Maximum
  • 2A Maximum Output Current
  • Low Ripple Burst Mode® Operation
     50µA IQ at 12VIN to 3.3VOUT
     Output Ripple < 15mVP-P
  • Adjustable Switching Frequency: 300kHz to 2.8MHz
  • Low Shutdown Current: IQ < 1µA
  • Integrated Boost Diode
  • Integrated Power Schottky Diode
  • Power Good Flag
  • Saturating Switch Design: 0.18Ω On-Resistance
  • 1.265V Feedback Reference Voltage
  • Output Voltage: 1.265V to 20V
  • Soft-Start Capability
  • Small 14-Pin Thermally Enhanced (4mm x 3mm) DFN Package
LT3681
36V, 2A, 2.8MHz Step-Down Switching Regulator with Integrated Power Schottky Diode
5V Step-Down Converter Efficiency Product Package 1
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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
PowerPath, Ideal Diodes, and Load Switches 1
LTC4359 RECOMMENDED FOR NEW DESIGNS Ideal Diode Controller with Reverse Input Protection
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 1


Models for the following parts are available in LTspice:

  • LT3681
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
DC1122A

LT3681EDE Demo Board | Integrated Boost/Catch Diodes, 4.5V ≤ VIN ≤ 34V, VOUT = 3.3V @ 2A

Product Details

Demonstration circuit 1122 features the LT3681 in a 500kHz step-down converter circuit, designed for 3.3V/2A output from a 4.5V to 34V input. The LT3681’s integrated boost diode and catch diode reduce the parts count.


 


DC1122A
LT3681EDE Demo Board | Integrated Boost/Catch Diodes, 4.5V ≤ VIN ≤ 34V, VOUT = 3.3V @ 2A
DC1122A - Schematic

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