NCP1422:800 mA Sync-Rect PFM Boost Converter with True-Cutoff and Ring-Killer
NCP1422 is a monolithic micropower high frequency step-up switching converter IC specifically designed for battery-operated hand-held electronic products up to 800mA loading. It integrates Sync-Rect to improve efficiency and to eliminate the external Schottky Diode. 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 LX or BAT to OUT is fully blocked and the OUT pin is isolated from the battery. This True-Cutoff function reduce the shutdown current to typically only 50nA. Ring-Killer is also integrated to eliminate the high-frequency ringing in discontinuous conduction mode. In addition to the above, Low-Battery Detector, Logic-Controlled Shutdown, Cycle-by-Cycle Current Limit and Thermal Shutdown provide value-added features for various battery-operated applications. With all these functions ON, the quiescent supply current is typical only 8.5 uA. This device is available in compact and low profile DFN10 package.
技术特性
- Output Current up to 800 mA at VIN = 2.5 V and VOUT = 3.3 V
- High Switching Frequency, up to 1.2MHz
- Anti-Ringing Ring-Killer for Discontinuous Conduction Mode
- Low Quiescent Current of 8.5 µA
- 1.0V Startup at No Load Guaranteed
- Output Voltage from 1.5V to 5V Adjustable
- 1.5A Cycle by Cycle Current Limit
- On Chip Thermal Shutdown with Hysteresis
- Housed in Space-Saving and Low Profile DFN10 package
- Pb-Free Package is Available
应用
- Personal Digital Assistants (PDA)
- Handheld Digital Audio Products
- Camcorders and Digital Still Cameras
- Conversion from one to two Alkaline, NiMH, NiCd battery cells to 3.0-5.0V or one Lithium-ion cells to 5.0V
- While LED Flash for Digital Cameras
|
封装图 PACKAGE DIMENSIONS
|
评估板信息
| 评估板 |
状况 |
无铅(Pb-free) |
简短说明 |
| NCP1422EVB |
Active |
|
NCP1422 Up to 800 mA DC-DC Converter Evaluation Board |
| NCP1422LEDGEVB |
Active |
 |
High Current LED Driver Evaluation Board |
订购信息 Ordering Information
| 产品 |
状况 |
Compliance |
具体说明 |
封装 |
MSL* |
容器 |
预算价格 (1千个数量的单价） |
| 类型 |
外形 |
类型 |
数量 |
| NCP1422MNR2G |
Active |
|
800 mA Sync-Rect PFM Boost Converter with True-Cutoff and Ring-Killer |
DFN-10 |
485C |
1 |
Tape and Reel |
3000 |
$0.6 |
| NCP1422MNR2 |
Last Shipments |
|
800 mA Sync-Rect PFM Boost Converter with True-Cutoff and Ring-Killer |
DFN-10 |
485C |
1 |
Tape and Reel |
3000 |
|
数据资料DataSheet下载
