NCP1422EVB:NCP1422 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.
特性
- 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
|
NCP1422EVB 实物图
|
评估板信息
| 评估板 |
状况 |
无铅(Pb-free) |
简短说明 |
所用产品 |
| NCP1422EVB |
Active |
 |
NCP1422 Up to 800 mA DC-DC Converter Evaluation Board |
NCP1422MNR2G |
技术文档
