3A, 14V, 600KHz Step-Down Converter with Synchronizable Gate Driver

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The MP38870 is a monolithic step-down switch mode converter with a built in internal high-side power MOSFET. It achieves 3A continuous output current over a wide input supply range with excellent load and line regulation. Current mode operation provides fast transient response and reliable over current protection. Fault condition protection includes cyclebycycle current limiting and thermal shutdown. The MP38870 requires a minimum number of readily available standard external components and is available in a space saving 3mm x 4mm 14-pin QFN package.
Product Features
- Wide 4.5V to 14V Operating Input Range
- 3A Continuous Output Current
- 80mΩ Internal Power MOSFET Switch
- Power Good Indicator
- Synchronous Gate Driver Delivers up to 95% Efficiency
- Fixed 600kHz Frequency
- External Synchronous Option: 250kHz-1.5MHz
- Cycle-by-Cycle Over Current Protection
- Thermal Shutdown
- Output Adjustable from 0.8V
- Stable with Low ESR Output Ceramic Capacitors
- Available in a 3x4mm 14-Pin QFN Package
Parametrics
- fsw (max) (kHz)600
- Vin (min) (V)4.5
- Vin (max) (V)14
- Iout (max) (A)3
- Isw Limit (typ) (A)4
- Max Duty Cycle (%)0.9
- Vfb (typ) (V)0.808
- Iq (typ) (mA)0.9
- Regulated Outputs1
- Vout (max) (V)11
- Vout (min) (V)0.8
- GradeCatalog
- PackageQFN-14 (3x4)
- Common FeaturesPower Good, Synchronous Rectification
- Special FeaturesExternal Frequency Sync
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