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MP9840 3.3-36V, 3.5A, 350kHz Synchronous Step-Down Converter QFN-16
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pMPS MP9840 — synchronous step-down converter, 3.3-36V input, 3.5A output, 350 kHz, QFN-16./p
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MP9840 3.3-36V, 3.5A, 350kHz Synchronous Step-Down Converter QFN-16
MPS MP9840 is a synchronous step-down converter that accepts 3.3 V to 36 V input, delivers 3.5 A, switches at 350 kHz, supplied in a QFN-16 package.
Key Specifications
| Part Number | MP9840 |
| Input Voltage | 3.3 V to 36 V |
| Output Current | 3.5 A |
| Switching Frequency | 350 kHz |
| Topology | Synchronous Step-Down Converter |
| Package | QFN-16 |
| Ordering Codes | MP9840 |
Features
- 2μA Low Shutdown Supply Current
- 14μA No-Load Quiescent Current
- Internal 125mΩ High-Side and 55mΩ Low- Side MOSFET
- 350kHz to 2.5MHz Programmable Switching Frequency
- Power Good (PG) Output
- External Soft Start (SS)
- 80ns Minimum On Time
- Selectable Forced CCM and AAM
- Hiccup Over-Current Protection (OCP)
- Available in a QFN-16 (3mmx4mm) Package
Applications
- Automotive 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.
- AEC-Q100 qualification suits this part to automotive rails.
- Package QFN-16 — check the land pattern in the datasheet before layout.
Common Questions
What is the input and output rating of the MP9840?
3.3–36 V input and 3.5 A output.
What switching frequency does the MP9840 run at?
350 kHz, programmable.
Which package is the MP9840 available in?
QFN-16.
Shenzhen Gaorunxin Technology Co., Ltd
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