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NB618 4.5-25V, 7A, 2MHz Step-Down Converter QFN14
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pMPS NB618 — step-down converter, 4.5-25V input, 7A output, 2 MHz, QFN14./p
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NB618 4.5-25V, 7A, 2MHz Step-Down Converter QFN14
MPS NB618 is a step-down converter that accepts 4.5 V to 25 V input, delivers 7 A, switches at 2 MHz, supplied in a QFN14 package.
Key Specifications
| Part Number | NB618 |
| Input Voltage | 4.5 V to 25 V |
| Output Current | 7 A |
| Switching Frequency | 2 MHz |
| Topology | Step-Down Converter |
| Package | QFN14 |
| Ordering Codes | NB618 |
Features
- Only 9 External Components
- Wide 4.5V to 25V Operating Input Range
- 7A Output Current
- Internal High Side Power MOSFET
- Fixed 700KHz Switching Frequency
- Sync from 300KHz to 2MHz External Clock
- Internal Compensation
- Power Good Output
- Integrated Bootstrap Diode
- OCP Protection and Thermal Shutdown
Applications
- Notebook Systems and I/O Power
- Networking Systems
- Digital Set Top Boxes
- Personal Video Recorders
- 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 QFN14 — check the land pattern in the datasheet before layout.
Common Questions
What is the input and output rating of the NB618?
4.5–25 V input and 7 A output.
What switching frequency does the NB618 run at?
2 MHz.
Which package is the NB618 available in?
QFN14.
Shenzhen Gaorunxin Technology Co., Ltd
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