Regulated Step-Down Charge Pumps

Analog Devices’ family of regulated step-down charge pumps are used to step-down or buck an input voltage to a lower-level regulated output voltage. Switched capacitor converters offer a small solution footprint and a simpler design than conventional inductive switchers, while providing better efficiency and run cooler than linear regulators. Key features include low quiescent current, multimode operation with automatic mode switching to maintain regulation, Iout up to 500mA, low noise, constant frequency operation, Burst Mode® operation, overtemperature, fault and short-circuit protection.
Product Selection Table

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)
CommentsPrice (1000+)
($ US)
1LTC7821 1 10 72 25 Adj 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 (LTC3255EDD#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#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)