稳压的降压型充电泵

Analog Devices 的充电泵系列提供了最为齐全的简单紧凑型无电感器 DC-DC 转换器设计可选方案。这些转换器可被用来对一个输入电压进行升压、降压或负输出转换操作。由于取消了电感器,因此这些开关电容器转换器提供了小巧的解决方案占板面积和较为简单的设计。不仅如此,通过运用片内扩展频谱技术,输入噪声和输出噪声均得到显着降低。
产品选型表

Regulated Step-Down Charge Pumps

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SortOrderPart#Number of OutputsVin
(min)
(V)
Vin
(max)
(V)
Output Current
(typ)
(A)
Output VoltageIsupply
(typ)
(A)
CommentsUS Price 1000 to 4999
($ US)
1LTC7821 1 10 72 25- 500µ Hybrid Step-Down Synchronous Controller $5.20 (LTC7821EUH#PBF)
2LTC3256 2 5.5 38 350m 3.3V, 5V 20µ Wide VIN Range Dual Output 350mA Step-Down Charge Pump with Watchdog Timer $2.95 (LTC3256EMSE#PBF)
3LTC3255 1 4 48 50m Adj (2.4V to 12.5V) 30µ Wide VIN Range Fault Protected 50mA Step-Down Charge Pump $2.30 (LTC3255EMSE#PBF)
4LTC3252 2 2.7 5.5 250m Adjustable (0.9 to 1.6) 60µ Dual Output Spread Spectrum, Ultralow Noise $2.60 (LTC3252EDE#PBF)
5LTC3251 1 2.7 5.5 500m 1.2V, 1.5V, Adj Spread spectrum, ultralow noise, 2-phase operation $1.95 (LTC3251EMSE-1.2#PBF)
6LTC3250 1 3.1 5.5 250m 1.2V, 1.5V 35µ Low Noise, 85% Efficiency $1.41 (LTC3250ES6-1.2#TRPBF)
7LTC1911 1 2.7 5.5 250m 1.5V, 1.8V 180µ Low Noise, 70% Efficiency $2.34 (LTC1911EMS8-1.5#PBF)
8LTC1503-2 1 2.4 6 100m 2V 25µ SD Disconnect $1.70 (LTC1503CS8-2#PBF)
9LTC1503-1.8 1 2.4 6 100m 1.8V 25µ SD Disconnect $1.70 (LTC1503CS8-1.8#PBF)