Alternative Parts
Overview
Features and Benefits
- 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
Product Details
The LTC3638 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 LTC3638 can supply up to 250mA 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 LTC3638’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 LTC3638 is a robust regulator suited for regulating from a wide variety of power sources. Additionally, the LTC3638 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 LTC3638s to be connected in parallel for higher current applications.
The LTC3638 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
Product Categories
Markets and Technologies
Product Lifecycle
Recommended for New Designs
This product has been released to the market. The data sheet contains all final specifications and operating conditions. For new designs, ADI recommends utilization of these products.
Evaluation Kits (1)
Documentation & Resources
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R526 Reliability Data3/26/2018
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DC2057A - Demo Manual2/14/2014
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80V to 150V Non-Isolated DC/DC2/6/2018
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High Voltage Non-Isolated Devices1/5/2018
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.
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.
LTspice Simulations
Models for the following parts are available in LTspice:
LTC3638
Product Recommendations
LTC3638 Companion Parts
Recommended Related Parts
Design Resources
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal.View our quality and reliability program and certifications for more information.
| Part Number | Material Declaration | Reliability Data | Pin/Package Drawing | CAD Symbols, Footprints & 3D Models |
|---|---|---|---|---|
| LTC3638EMSE#PBF | Material Declaration | Reliability Data | 16(12)-Lead MSOP w/ EP | |
| LTC3638EMSE#TRPBF | Material Declaration | Reliability Data | 16(12)-Lead MSOP w/ EP | |
| LTC3638HMSE#PBF | Material Declaration | Reliability Data | 16(12)-Lead MSOP w/ EP | |
| LTC3638HMSE#TRPBF | Material Declaration | Reliability Data | 16(12)-Lead MSOP w/ EP | |
| LTC3638IMSE#PBF | Material Declaration | Reliability Data | 16(12)-Lead MSOP w/ EP | |
| LTC3638IMSE#TRPBF | Material Declaration | Reliability Data | 16(12)-Lead MSOP w/ EP | |
| LTC3638MPMSE#PBF | Material Declaration | Reliability Data | 16(12)-Lead MSOP w/ EP | |
| LTC3638MPMSE#TRPBF | Material Declaration | Reliability Data | 16(12)-Lead MSOP w/ EP | |
| Wafer Fabrication Data | R526 Reliability Data |
PCN-PDN Information
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Sample & Buy
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Sampling
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Evaluation Boards
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Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.