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MP2181 2.5-5.5V, 1A, 1.2MHz Step-Down Converter SOT583
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pMPS MP2181 — step-down converter, 2.5-5.5V input, 1A output, 1.2 MHz, SOT583./p
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MP2181 2.5-5.5V, 1A, 1.2MHz Step-Down Converter SOT583
MPS MP2181 is a step-down converter that accepts 2.5 V to 5.5 V input, delivers 1 A, switches at 1.2 MHz, supplied in a SOT583 package.
Key Specifications
| Part Number | MP2181 |
| Input Voltage | 2.5 V to 5.5 V |
| Output Current | 1 A |
| Switching Frequency | 1.2 MHz |
| Topology | Step-Down Converter |
| Package | SOT583 |
| Ordering Codes | MP2181 |
Features
- Low IQ: 21μA
- 1.2MHz Switching Frequency
- EN for Power Sequencing
- 1% FB Accuracy
- Wide 2.5V to 5.5V Operating Input Range
- Output Adjustable from 0.6V
- Up to 1A Output Current
- 90mΩ and 50mΩ Internal Power MOSFET Switches
- 100% Duty On
- Output Discharge
Applications
- Wireless/Networking Cards
- Portable Instruments
- Battery Powered Devices
- Low-Voltage I/O System Power
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 SOT583 — check the land pattern in the datasheet before layout.
Common Questions
What is the input and output rating of the MP2181?
2.5–5.5 V input and 1 A output.
What switching frequency does the MP2181 run at?
1.2 MHz.
Which package is the MP2181 available in?
SOT583.
Shenzhen Gaorunxin Technology Co., Ltd
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