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MP1477H 4.2-17V, 3A, 1.2MHz Step-Down Converter SOT563
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pMPS MP1477H — step-down converter, 4.2-17V input, 3A output, 1.2 MHz, SOT563./p
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MP1477H 4.2-17V, 3A, 1.2MHz Step-Down Converter SOT563
MPS MP1477H is a step-down converter that accepts 4.2 V to 17 V input, delivers 3 A, switches at 1.2 MHz, supplied in a SOT563 package.
Key Specifications
| Part Number | MP1477H |
| Input Voltage | 4.2 V to 17 V |
| Output Current | 3 A |
| Switching Frequency | 1.2 MHz |
| Topology | Step-Down Converter |
| Package | SOT563 |
| Ordering Codes | MP1477H |
Features
- Wide 4.2V to 17V Operating Input Range
- 58mΩ/25mΩ Low RDS(ON) Internal Power MOSFETs
- 200µA Low IQ
- High-Efficiency Synchronous Mode Operation
- Forced PWM Mode Operation
- Fast Load Transient Response
- 1.2MHz Switching Frequency
- Internal Soft Start (SS)
- Over-Current Protection (OCP) and Hiccup
- Thermal Shutdown
Applications
- Security Camera
- Digital Set-Top Boxes
- Flat-Panel Television and Monitors
Design Notes
- The step-down topology needs an inductor and output capacitor sized for the ripple at the switching frequency, not just the DC load.
- Keep the input loop short — high di/dt at the switch node sets conducted EMI.
- Power switches are integrated, so the thermal path is the PCB copper under the pad.
- Package SOT563 — check the land pattern in the datasheet before layout.
Common Questions
What is the input and output rating of the MP1477H?
4.2–17 V input and 3 A output.
What switching frequency does the MP1477H run at?
1.2 MHz.
Which package is the MP1477H available in?
SOT563.
Shenzhen Gaorunxin Technology Co., Ltd
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