LTC3638

RECOMMENDED FOR NEW DESIGNS

High Efficiency, 140V 250mA Step-Down Regulator

Part Models
8
1ku List Price
Starting From $4.37
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Part Details

  • Wide Operating Input Voltage Range: 4V to 140V
  • Internal Low Resistance Power MOSFET
  • No Compensation Required
  • Adjustable 20mA to 250mA Maximum Output Current
  • Low Dropout Operation: 100% Duty Cycle
  • Low Quiescent Current: 12μA
  • Wide Output Range: 0.8V to VIN
  • 0.8V ±1% Feedback Voltage Reference
  • Precise RUN Pin Threshold
  • Internal or External Soft-Start
  • Programmable 1.8V, 3.3V, 5V or Adjustable Output
  • Few External Components Required
  • Programmable Input Overvoltage Lockout
  • Thermally Enhanced High Voltage MSOP Package
LTC3638
High Efficiency, 140V 250mA Step-Down Regulator
5V to 140V Input to 5V Output, 250mA Step-Down Regulator Efficiency and Power Loss vs Load Current Product Package 1
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Documentation

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
Surge Stopper, Overvoltage, and Overcurrent Protection 1
LTC4366 RECOMMENDED FOR NEW DESIGNS High Voltage Surge Stopper
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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
DC2057A

LTC3638 Demo Board | 4V ≤ VIN ≤ 140V, VOUT = 1.8V/3.3V/5V/Adjustable @ 250mA

Product Details

Demonstration circuit 2057A is a high input voltage, 250mA output DC/DC power supply featuring the LTC3638. The IC operates with high efficiency Burst Mode® operation and includes an internal high side power MOSFET. The board will accept an input voltage between 4V and 140V, and provide jumper selected output voltages of 1.8V, 3.3V, 5V with an option for additional voltages. The IC includes internal soft-start and a provision for increasing soft-start time.

DC2057A
LTC3638 Demo Board | 4V ≤ VIN ≤ 140V, VOUT = 1.8V/3.3V/5V/Adjustable @ 250mA
DC2057A - Schematic

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