The LTC3642EMS8E-5 is a high efficiency, high voltage step-down DC/DC converter with internal high side and synchronous power switches that draws only 12μA typical DC supply current at no load while maintaining output voltage regulation.
The LTC3642EMS8E-5 can supply up to 50mA load current and features a programmable peak current limit that provides a simple method for optimizing efficiency in lower current applications. The LTC3642’s combination of Burst Mode® operation, integrated power switches, low quiescent current, and programmable peak current limit provides high efficiency over a broad range of load currents.
With its wide 4.5V to 45V input range and internal overvoltage monitor capable of protecting the part through 60V surges, the LTC3642EMS8E-5 is a robust converter suited for regulating a wide variety of power sources. Additionally, the LTC3642EMS8E-5 includes a precise run threshold and soft-start feature to guarantee that the power system start-up is well-controlled in any environment.
The LTC3642EMS8E-5 is available in the thermally enhanced 3mm × 3mm DFN and MS8E packages.
Feature
- Wide Input Voltage Range: 4.5V to 45V
- Tolerant of 60V Input Transients
- Internal High Side and Low Side Power Switches
- No Compensation Required
- 50mA Output Current
- Low Dropout Operation: 100% Duty Cycle
- Low Quiescent Current: 12μA
- 0.8V Feedback Voltage Reference
- Adjustable Peak Current Limit
- Internal and External Soft-Start
- Precise RUN Pin Threshold with Adjustable Hysteresis
- 3.3V, 5V and Adjustable Output Versions
- Only Three External Components Required for Fixed Output Versions
- Low Profile (0.75mm) 3mm × 3mm DFN and Thermally-Enhanced MS8E Packages
Applications
- 4mA to 20mA Current Loops
- Industrial Control Supplies
- Distributed Power Systems
- Portable Instruments
- Battery-Operated Devices
- Automotive Power Systems
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