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Overview
| Topology | Buck Converter |
| Input voltage | 4.3-7 V |
| Switching frequency | 215-285 kHz |
| Output 1 | 1.2 V / 3 A |
| IC revision | 0.9 |
Description
The MP9403 is a monolithic synchronous buck regulator. The device integrates a 150mΩ high-side MOSFET and a 100mΩ low-side MOSFET that provides 3A continuous load current over input voltage of 4.3V to 7V. Current mode control provides fast transient response and cycle-by-cycle current limit.An adjustable soft-start prevents inrush current at turn-on. In shutdown mode, the supply current drops to 1μA.This device, available in an 8-pin SOIC package with exposed pad, provides a very compact system solution with minimal reliance on external components.
Features
- 3A Output Current
- 4.3V to 7V Operating Input Range
- Integrated MOSFET Switches
- Output Adjustable from 0.80V to 5.50V
- Up to 93% Efficiency
- Programmable Soft-Start
- Stable with Low ESR Ceramic Output Capacitors
- Fixed 250kHz Frequency
- Cycle-by-Cycle Over Current Protection
- Input Under Voltage Lockout
- Thermally Enhanced 8-Pin SOIC Package
Note:Refer page no 7 for Inductor selection guide.
Typical applications
- Notebook Computers
- Pre-Regulator for Linear Regulators
- Distributed Power Systems
More information
Products
| Order Code | Datasheet | Simulation | Downloads | Status | Product series | L (µH) | IRP,40K (A) | ISAT (A) | RDC max. (mΩ) | fres (MHz) | Size | Version | Samples | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | 744777004 | SPEC | 8 files | Active i| Production is active. Expected lifetime: >10 years. | WE-PD SMT Power Inductor | 4.7 | 4.9 | 4 | 40 | 37 | 7345 | Standard |
| Samples |
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| Order Code | Datasheet | Simulation | Downloads | Status | Product series | L (µH) | IRP,40K (A) | ISAT (A) | RDC max. (mΩ) | fres (MHz) | Size | Version | Samples |
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