LTC1879 1.2A Synchronous Step-Down Regulator with 15µA Quiescent Current
The LTC™1879 is a high efficiency monolithic synchronous buck regulator using a constant frequency, current mode architecture. Operating supply current is only 15µA with no load and drops to <1µA in shutdown. The input supply voltage range of 2.65V to 10V makes the LTC1879 ideally suited for both single and dual Li-Ion battery-powered applications. 100% duty cycle provides low dropout operation, extending battery life in portable systems.
The switching frequency is internally set to 550kHz, allowing the use of small surface mount inductors and capacitors. For noise sensitive applications, the LTC1879 can be externally synchronized from 350kHz to 750kHz. Burst Mode operation is inhibited during synchronization or when the SYNC/MODE pin is pulled low.
The internal synchronous rectifier switch increases efficiency and eliminates the need for an external Schottky diode. Low output voltages are easily supported with a 0.8V feedback reference voltage. The LTC1879 is available in a 16-lead SSOP package
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LTC1879 订购信息和价格参考Package Variations and Pricing
| 器件型号 | 封装 | 引脚 | 温度 | 价格 (以 1 ~ 99 片为批量) | 价格 (以 1000 片为批量) * |
| LTC1879EGN | SSOP | 16 | E | $4.26 | $3.60 |
| LTC1879EGN#PBF | SSOP | 16 | E | $4.26 | $3.60 |
| LTC1879EGN#TR | SSOP | 16 | E | $3.66 | |
| LTC1879EGN#TRPBF | SSOP | 16 | E | $3.66 |
LTC1879 数据手册及相关资料下载
- 数据手册(英文) : LTC1879 - 1.2A Synchronous Step-Down Regulator with 15µA Quiescent Current.PDF
- 设计要点 (英文) : Design Solutions 10 - Active Voltage Positioning Reduces Output Capacitors.PDF
- 可靠性数据 : R419 Reliability Data .PDF
