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Overview
| Topology | Buck Converter |
| Input voltage | 3.3-36 V |
| Switching frequency | 1600-2400 kHz |
| Output 1 | 2.5 V |
| Output 2 | 1.2 V |
| Output 3 | 3.3 V |
| IC revision | 1.33 |
Description
The MP2451 is a high frequency (2MHz) stepdown switching regulator with integrated internal high-side high voltage power MOSFET.It provides single 0.6A (or less) highly efficient output with current mode control for fast loopresponse.
The wide 3.3V to 36V input range accommodates a variety of step-downapplications in automotive input environment. A 3μA shutdown mode quiescent current allows use in battery-powered applications.
High power conversion efficiency over a wideload range is achieved by scaling down the switching frequency at light load condition to reduce the switching and gate driving losses.
Frequency fold-back helps prevent inductor current runaway during start-up. Thermal shutdown provides reliable, fault-tolerant operation.
The MP2451 is available in the cost-effective SOT23-6L package.
Features
- 130μA Operating Quiescent Current
- Wide 3.3V to 36V Operating Input Range
- 500mΩInternal Power MOSFET
- 2MHz fixed Switching Frequency
- Internally compensated
- Stable with Ceramic Output Capacitors
- Internal Soft-Start
- Precision Current Limit Without Current Sensing Resistor
90% Efficiency
- Output Adjustable from +0.8V to 0.8xVIN
- 3μA Low Shutdown Supply Current
- -SOT23-6 and TSOT23-6 Packages
Typical applications
- High Voltage Power Conversion
- Industrial Power Systems
- Battery Powered Systems
- Automotive Systems
- Distributed Power Systems