High Voltage Charge Pumps
Analog Devices’ family of high voltage charge pumps offers the widest selection of simple and compact inductorless dc-to-dc converter designs. These converters can be used to step up, step down, or invert an input voltage. Key features include fault protection, low quiescent current, and automatic mode switching to maintain regulation. By eliminating the inductor, these switched capacitor converters provide a small solution footprint and a simpler design.
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High Voltage Charge Pumps
| SortOrder | Part# | Vin (min) (V) | Vin (max) (V) | Output Current (typ) (A) | Output Voltage | Function | Isupply (typ) (A) | Comments | Price (1000+) ($ US) |
|---|---|---|---|---|---|---|---|---|---|
| 1 | LTC7820 | 6 | 72 | 20 | 12V, -12V, 24V, 48V or higher, up to 500W+ | Doubler or Inverter, Fixed Ratio High Power DC/DC: Divider | 1.5m | Fixed Ratio High Power Inductorless (Charge Pump) DC/DC Controller | $4.70 (LTC7820EUFD#PBF) |
| 2 | LTC3246 | 2.7 | 38 | 500m | 5V or Adjustable (2.5V to 5V), Fixed 3.3V | Charge Pump | 20µ | Wide VIN Range Buck-Boost Charge Pump with Watchdog Timer | $3.25 (LTC3246EMSE#PBF) |
| 3 | LTC3256 | 5.5 | 38 | 350m | 3.3V, 5V | Regulated Step-Down Charge Pump | 20µ | Wide VIN Range Dual Output 350mA Step-Down Charge Pump with Watchdog Timer | $2.95 (LTC3256EMSE#PBF) |
| 4 | LTC3255 | 4 | 48 | 50m | Adj (2.4V to 12.5V) | Regulated Step-Down Charge Pump | 30µ | Wide VIN Range Fault Protected 50mA Step-Down Charge Pump | $2.30 (LTC3255EDD#PBF) |
| 5 | LTC3245 | 2.7 | 38 | 250m | 5V or Adjustable (2.5V to 5V), Fixed 3.3V | Regulated Buck-Boost Charge Pump | 18µ | Wide VIN Range, Low Noise, 250mA Buck-Boost Charge Pump | $2.80 (LTC3245EDE#PBF) |
| 6 | LTC3261 | 4.5 | 32 | 100m | -Adj | Regulated Inverting Charge Pump | 60µ | High Voltage Low Quiescent Current Inverting Charge Pump | $2.87 (LTC3261EMSE#PBF) |
| 7 | LTC3260 | 4.5 | 32 | 100m | Adj, -Adj | Negative Linear Regulator, Positive Linear Regulator, Regulated Inverting Charge Pump | 100µ | Low Noise Dual Supply Inverting Charge Pump | $3.40 (LTC3260EDE#PBF) |
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