LTC7138

RECOMMENDED FOR NEW DESIGNS

High Efficiency, 140V 400mA Step-Down Regulator with PassThru

Data Sheet Product Selection Table
Part Models
8
1ku List Price
Starting From $4.55
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Part Details

  • Wide Operating Input Voltage Range: 4V to 140V
  • Internal Low Resistance Power MOSFET
  • No Compensation Required
  • Adjustable 100mA to 400mA 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
LTC7138
High Efficiency, 140V 400mA Step-Down Regulator with PassThru
5V to 140V Input to 5V Output, 400mA Step-Down Regulator Efficiency and Power Loss vs Load Current Product Package 1
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Documentation

Data Sheet 1

Reliability Data 1

User Guide 1

Design 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
Surge Stopper, Overvoltage, and Overcurrent Protection 1
LTC4366
RECOMMENDED FOR NEW DESIGNS High Voltage Surge Stopper
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Tools & Simulations

LTspice 3

Models for the following parts are available in LTspice:

  • LTC7138
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
schematic 2
schematic 3
schematic 4
schematic 5
DC2172A

LTC7138EMSE Demo Board | HV µPower Buck, 4V ≤ VIN ≤ 140V, VOUT = 5V/3.3V/1.8V/Adj @ Up to 400mA

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Product Details

Demonstration circuit 2172A is a high input voltage, 400mA step-down regulator featuring the LTC7138. The output of the regulator can be programmed for either 5V, 3.3V or 1.8V with on-board jumpers or is adjustable from 800mV to VIN using an optional feedback divider. The input voltage range is from 4V to 140V. The LTC7138’s Burst Mode® operation, low quiescent current and internal top FET switch provide high efficiency over a wide range of loads.


 
DC2172A
LTC7138EMSE Demo Board | HV µPower Buck, 4V ≤ VIN ≤ 140V, VOUT = 5V/3.3V/1.8V/Adj @ Up to 400mA
DC2172A Demo Board DC2172A Demo Board DC2172A Demo Board DC2172A Demo Board DC2172A - Schematic

Latest Discussions

4 Weeks Ago
RE: Application with Multiple LTC7138s
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