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MP9143 5.5V, 3A, 1.2MHz Step-Down Converter TSOT23
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pMPS MP9143 — step-down converter, 5.5V input, 3A output, 1.2 MHz, TSOT23./p
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MP9143 5.5V, 3A, 1.2MHz Step-Down Converter TSOT23
MPS MP9143 is a step-down converter that accepts up to 5.5 V input, delivers 3 A, switches at 1.2 MHz, supplied in a TSOT23 package.
Key Specifications
| Part Number | MP9143 |
| Input Voltage | up to 5.5 V |
| Output Current | 3 A |
| Switching Frequency | 1.2 MHz |
| Topology | Step-Down Converter |
| Package | TSOT23 |
| Ordering Codes | MP9143 |
Features
- Wide 2.5V-to-5.5V Operating Input Range
- Output Voltage as Low as 0.6V
- 100% Duty Cycle in Dropout
- Up to 3A Output Current
- Low IQ: 40µA
- 80mΩ and 40mΩ Internal Power MOSFET Switches
- Default 1.2MHz Switching Frequency
- EN and Power-Good for Power Sequencing
- Cycle-by-Cycle Over-Current Protection
- Auto Discharge at Power Off
Applications
- Low Voltage I/O System Power
- Handheld/Battery-powered Systems
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 TSOT23 — check the land pattern in the datasheet before layout.
Common Questions
What is the input and output rating of the MP9143?
–5.5 V input and 3 A output.
What switching frequency does the MP9143 run at?
1.2 MHz.
Which package is the MP9143 available in?
TSOT23.
Shenzhen Gaorunxin Technology Co., Ltd
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