LTC7138
Info : RECOMMENDED FOR NEW DESIGNS
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LTC7138

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

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Info : RECOMMENDED FOR NEW DESIGNS tooltip
Info : RECOMMENDED FOR NEW DESIGNS tooltip
Part Details
Part Models 8
1ku List Price Starting From $4.55
Features
  • 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
Additional Details
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The LTC7138 is a high efficiency step-down DC/DC regulator with internal power switch that draws only 12μA typical DC supply current while maintaining a regulated output voltage at no load.

The LTC7138 can supply up to 400mA load current and features a programmable peak current limit that provides a simple method for optimizing efficiency and for reducing output ripple and component size. The LTC7138’s combination of Burst Mode® operation, integrated power switch, low quiescent current, and programmable peak current limit provides high efficiency over a broad range of load currents.

With its wide input range of 4V to 140V and programmable overvoltage lockout, the LTC7138 is a robust regulator suited for regulating from a wide variety of power sources. Additionally, the LTC7138 includes a precise run threshold and soft-start feature to guarantee that the power system start-up is well-controlled in any environment. A feedback comparator output enables multiple LTC7138s to be connected in parallel for higher current applications.

The LTC7138 is available in a thermally enhanced high voltage-capable 16-lead MSE package with four missing pins.

Applications

  • Industrial Control Supplies
  • Medical Devices
  • Distributed Power Systems
  • Portable Instruments
  • Battery-Operated Devices
  • Avionics
  • Automotive
Part Models 8
1ku List Price Starting From $4.55

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Documentation

Documentation

Part Model Pin/Package Drawing Documentation CAD Symbols, Footprints, and 3D Models
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Product Lifecycle

PCN

Jun 5, 2024

- 24_0003

Epoxy Change from Henkel 8290 to 8290A for MSOP Package (2)

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PRODUCTION

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PRODUCTION

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LTC7138MPMSE#TRPBF

PRODUCTION

Feb 4, 2020

- 20_0132

Laser Top Mark for 16-Lead MSOP Packages Assembled in ADPG and UTAC

LTC7138EMSE#PBF

PRODUCTION

LTC7138EMSE#TRPBF

PRODUCTION

LTC7138HMSE#PBF

PRODUCTION

LTC7138HMSE#TRPBF

PRODUCTION

LTC7138IMSE#PBF

PRODUCTION

LTC7138IMSE#TRPBF

PRODUCTION

LTC7138MPMSE#PBF

PRODUCTION

LTC7138MPMSE#TRPBF

PRODUCTION

Filter by Model

reset

Reset Filters

Part Models

Product Lifecycle

PCN

Jun 5, 2024

- 24_0003

arrow down

Epoxy Change from Henkel 8290 to 8290A for MSOP Package (2)

LTC7138EMSE#PBF

PRODUCTION

LTC7138EMSE#TRPBF

PRODUCTION

LTC7138HMSE#PBF

PRODUCTION

LTC7138HMSE#TRPBF

PRODUCTION

LTC7138IMSE#PBF

PRODUCTION

LTC7138IMSE#TRPBF

PRODUCTION

LTC7138MPMSE#PBF

PRODUCTION

LTC7138MPMSE#TRPBF

PRODUCTION

Feb 4, 2020

- 20_0132

arrow down

Laser Top Mark for 16-Lead MSOP Packages Assembled in ADPG and UTAC

LTC7138EMSE#PBF

PRODUCTION

LTC7138EMSE#TRPBF

PRODUCTION

LTC7138HMSE#PBF

PRODUCTION

LTC7138HMSE#TRPBF

PRODUCTION

LTC7138IMSE#PBF

PRODUCTION

LTC7138IMSE#TRPBF

PRODUCTION

LTC7138MPMSE#PBF

PRODUCTION

LTC7138MPMSE#TRPBF

PRODUCTION

Software & Part Ecosystem

Software & Part Ecosystem

Evaluation Kit

Evaluation Kits 1

reference details image

DC2172A

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

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DC2172A

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

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

Product Detail

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.


 


Tools & Simulations

Tools & Simulations 1

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.

To launch ready-to-run LTspice demonstration circuits for this part:

Step 1: Download and install LTspice on your computer.

Step 2: Click on the link in the section below to download a demonstration circuit.

Step 3: If LTspice does not automatically open after clicking the link below, you can instead run the simulation by right clicking on the link and selecting “Save Target As.” After saving the file to your computer, start LTspice and open the demonstration circuit by selecting ‘Open’ from the ‘File’ menu.

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