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NCP1422GEVB:  Up to 800 mA DC-DC Converter Evaluation Board

The NCP1422 is a monolithic, micro-power, high-frequency, step-up switching converter IC designed for battery operated hand-held electronic products with up to 800 mA loading. It integrates a synchronous rectifier (Sync-Rect) to improve efficiency and to eliminate the external Schottky Diode. The NCP1422's high switching frequency (up to 1.2 MHz) allows for a low profile, small sized inductor and output capacitor to be used. When the device is disabled, the internal conduction path from the battery to the load is fully blocked, which isolates the load from the battery. This True-Cutoff function reduces the shutdown current to typically only 50 nA. A Ring-Killer is also integrated to eliminate high-frequency ringing in discontinuous conduction mode. Finally, a Low-Battery Detector, Logic-Controlled Shutdown, Cycle-by Cycle Current Limiting and Thermal Shutdown provide value-added features for various battery operated applications. With all these functions on, the quiescent supply current is typically only 8.5 uA. This device is available in the compact and low profile DFN-10 package.

The NCP1422 evaluation board can be configured to output 3.3 V or 5.0 V by removing or adding, respectively, the JP2 jumper. The 5.0 V configuration sources up to 800 mA with Vin = 3.6 V, and the 3.3 V configuration sources up to 800 mA with Vin = 2.5 V. The board also includes a low-voltage, startup circuit that can be enabled with the JP3 jumper.
Features and Applications


  • High Efficiency:
    - 94% for 3.3 V Output at 200 mA from 2.0 V Input
    - 84% for 3.3 V Output at 500 mA from 2.5 V Input
  • High Switching Frequency, up to 1.2 MHz (Not Hitting Current Limit)
  • True-Cutoff Function Reduces Device Shutdown Current to typically 50 nA
  • Ring-Killer for Discontinuous Conduction Mode
  • Space-Saving 3mm x 3mm DFN-10 package
Evaluation/Development Tool Information
Product Status Compliance Short Description Parts Used Action
NCP1422GEVB Active
Up to 800 mA DC-DC Converter Evaluation Board NCP1422MNR2G
Technical Documents
Type Document Title Document ID/Size Rev
Eval Board: BOM NCP1422GEVB Bill of Materials ROHS Compliant NCP1422GEVB_BOM_ROHS - 70 KB  1 
Eval Board: Gerber NCP1422GEVB Gerber Layout Files (Zip Format) NCP1422GEVB_GERBER - 45 KB  0 
Eval Board: Schematic NCP1422GEVB Schematic NCP1422GEVB_SCHEMATIC - 46 KB  0 
Eval Board: Test Procedure NCP1422GEVB Test Procedure NCP1422GEVB_TEST_PROCEDURE - 128 KB  0 
Video Up to 800 mA DC-DC Converter Evaluation Board - NCP1422GEVB Test Procedure WVD17505/D   
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Up to 800 mA DC-DC Converter Evaluation Board - NCP1422GEVB Test Procedure
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