LTC3250 High Efficiency, Low Noise, Inductorless Step-Down DC/DC Converter
The LTC®3250-1.5/LTC3250-1.2 are charge pump stepdown DC/DC converters that produce a 1.5V or 1.2V regulated output from a 2.7V to 5.5V input. The parts use switched capacitor fractional conversion to achieve typical efficiency two times higher than that of a linear regulator. No inductors are required.
A unique constant frequency architecture provides a low noise regulated output as well as lower input noise than conventional charge pump regulators.* High frequency operation (fOSC = 1.5MHz) simplifies filtering to further reduce conducted noise. The part also uses Burst Mode® operation to improve efficiency at light loads.
Low operating current (35µA with no load, <1µA in shutdown) and low external parts count (three small ceramic capacitors) make the LTC3250-1.5/LTC3250-1.2 ideally suited for space constrained battery powered applications. The parts are short-circuit and overtemperature protected, and are available in a low profile (1mm) 6-pin ThinSOT™ package.
*U.S. Patent #6, 411, 531
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LTC3250 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) * |
| LTC3250ES6-1.2 | SOT | 6 | E | $2.12 | |
| LTC3250ES6-1.2#PBF | SOT | 6 | E | $2.12 | |
| LTC3250ES6-1.2#TR | SOT | 6 | E | $2.12 | $1.41 |
| LTC3250ES6-1.2#TRM | SOT | 6 | E | $2.12 | $1.43 |
| LTC3250ES6-1.2#TRMPBF | SOT | 6 | E | $2.12 | $1.43 |
| LTC3250ES6-1.2#TRPBF | SOT | 6 | E | $2.12 | $1.41 |
| LTC3250ES6-1.5 | SOT | 6 | E | $2.12 | |
| LTC3250ES6-1.5#PBF | SOT | 6 | E | $2.12 | |
| LTC3250ES6-1.5#TR | SOT | 6 | E | $2.12 | $1.41 |
| LTC3250ES6-1.5#TRM | SOT | 6 | E | $2.12 | $1.43 |
| LTC3250ES6-1.5#TRMPBF | SOT | 6 | E | $2.12 | $1.43 |
| LTC3250ES6-1.5#TRPBF | SOT | 6 | E | $2.12 | $1.41 |
