MP4423A

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The MP4423A is a high-efficiency, synchronous, rectified, step-down, switch-mode converter with built-in power MOSFETs. It offers a very compact solution that achieves 3A of continuous output current with excellent load and line regulation over a wide input supply range. The MP4423A uses synchronous mode operation to achieve higher efficiency over the output current load range. Current-mode operation provides fast transient response and eases loop stabilization. Full protection features include over-current protection (OCP) and thermal shutdown. The MP4423A requires a minimal number of readily available, standard, external components and is available in a compact QFN-8 (3mmx3mm) package.
Product Features
- Wide 4V to 36V Continuous Operating Input Range
- 85mO/55mO Low RDS(ON) Internal Power MOSFETs
- High-Efficiency Synchronous Mode Operation
- Default 410kHz Switching Frequency
- Synchronizes to a 200kHz to 2.2MHz External Clock
- High Duty Cycle for Automotive Cold Crank
- Forced CCM Mode
- Internal Soft Start
- Power Good
- Over-Current Protection (OCP) and Hiccup
- Thermal Shutdown
- Output Adjustable from 0.8V
- Available in a QFN-8 (3mmx3mm) Package
Parametrics
- fsw (max) (kHz)410
- Vin (min) (V)4
- Vin (max) (V)36
- Iout (max) (A)3
- Vfb (typ) (V)0.79
- Iq (typ) (mA)0.6
- GradeCatalog
- PackageQFN-8 (3x3)
- Control ModeCurrent Mode
- Common FeaturesLight-Load Efficiency, Power Good, Synchronous Rectification
- Special FeaturesExternal Frequency Sync
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