Features and Benefits
- Wide Operating Input Voltage Range: 4V to 76V
- Internal 350mΩ Power MOSFET
- No Compensation Required
- Adjustable 100mA to 1A 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 and External Soft-Start
- Programmable 1.8V, 3.3V, 5V or Adjustable Output
- Few External Components Required
- Programmable Input Overvoltage Lockout
- Low Profile (0.75mm) 3mm × 5mm DFN and Thermally-Enhanced MSE16 Packages
- AEC-Q100 Qualified for Automotive Applications
The LTC3637 is a high efficiency step-down DC/DC regulator with an internal high side power switch that draws only 12μA DC supply current while maintaining a regulated output voltage at no load.
The LTC3637 can supply up to 1A 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 LTC3637’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 76V, and programmable overvoltage lockout, the LTC3637 is a robust regulator suited for regulating from a wide variety of power sources. Additionally, the LTC3637 includes a precise run threshold and soft-start feature to guarantee that the power system start-up is well-controlled in any environment.
The LTC3637 is available in the thermally-enhanced 3mm × 5mm DFN and the MSE16 packages.
- Industrial Control Supplies
- Medical Devices
- Distributed Power Systems
- Portable Instruments
- Battery-Operated Devices
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)
Demonstration circuit 2056A is a 76V input, 1A output DC/DC power supply featuring the LTC3637. The IC operates in a high efficiency Burst Mode® operation and includes an internal high side power MOSFET. The board will accept an input voltage between 4V and 76V, and provide jumper selected output voltages of 1.8V, 3.3V, 5V and an option for additional voltages. The IC includes internal soft-start and a provision for increasing soft-start time.
Tools & Simulations
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.
Models for the following parts are available in LTspice:
LTC3637 Companion Parts
Recommended Related Parts
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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.