Unregulated Doubling/Inverting Charge Pumps
Analog Devices’ family of unregulated doubling/inverting charge pumps are used to either boost/double or invert an input voltage to an unregulated output voltage. By eliminating the inductor, these switched capacitor converters offer a small solution footprint and a simpler design than conventional inductive switchers. 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
Latest Resources
Application Notes
- AN29 - Some Thoughts on DC-DC Converters PDF
- AN43 - Bridge Circuits PDF
- AN42 - Voltage Reference Circuit Collection PDF
- AN23 - Micropower Circuits for Signal Conditioning PDF
- AN7 - Some Techniques for Direct Digitization of Transducer Outputs PDF
Design Notes
Product Selector Card
Unregulated Doubling/Inverting Charge Pumps
| SortOrder | Part# | Vin (min) (V) | Vin (max) (V) | Output Current (typ) (A) | Output Voltage | Isupply (typ) (A) | Comments | Ishutdown (typ) (A) | Price (1000+) ($ US) |
|---|---|---|---|---|---|---|---|---|---|
| 1 | LTC7820 | 6 | 72 | 20 | 12V, -12V, 24V, 48V or higher, up to 500W+ | 1.5m | Fixed Ratio High Power Inductorless (Charge Pump) DC/DC Controller | 60µ | $4.70 (LTC7820EUFD#PBF) |
| 2 | LTC3261 | 4.5 | 32 | 100m | -Vin | 60µ | High Voltage Low Quiescent Current Inverting Charge Pump | 2µ | $2.87 (LTC3261EMSE#PBF) |
| 3 | ADM8829 | 1.5 | 5.5 | 25m | -Vin | 600µ | Switched-Capacitor Voltage Inverter with Shutdown | - | $0.84 (ADM8829ARTZ-REEL7) |
| 4 | ADM8828 | 1.5 | 5.5 | 25m | -Vin | 600µ | Switched-Capacitor Voltage Inverter with Shutdown | 20n | $0.84 (ADM8828ARTZ-REEL7) |
| 5 | ADM8660 | 1.5 | 7 | 100m | 2Vin, -Vin | 600µ | CMOS Switched-Capacitor Voltage Converters | 300n | $2.11 (ADM8660ANZ) |
| 6 | ADM660 | 1.5 | 7 | 100m | 2Vin, -Vin | 600µ | CMOS Switched-Capacitor Voltage Converters | - | $2.00 (ADM660ANZ) |
| 7 | LTC660 | 1.5 | 5.5 | 100m | 2Vin, -Vin | 230µ | High Current, +5V to -5V | 1µ | $2.75 (LTC660CN8#PBF) |
| 8 | LTC1144 | 2 | 18 | 50m | 0.5Vin, 2Vin, -Vin | 1.1m | High Voltage, Shutdown | 8µ | $2.40 (LTC1144CN8#PBF) |
| 9 | LTC1044A | 1.5 | 12 | 20m | 0.5Vin, 2Vin, -Vin | 200µ | Higher VIN (12V) than LTC1044/7660 | 1.5µ | $2.20 (LTC1044ACN8#PBF) |
| 10 | LTC1046 | 1.5 | 6 | 50m | 0.5Vin, 2Vin, -Vin | 165µ | Higher Current than LTC1044/7660 | 1µ | $2.15 (LTC1046CN8#PBF) |
| 11 | LT1026 | 4 | 10 | 15m | 2Vin, -2Vin | 7m | Dual Supply Generator (+5V to ±10V) | 1µ | $2.05 (LT1026CN8#PBF) |
| 12 | LT1054L | 3.5 | 7 | 125m | Adj | 2.5m | Charge Pump, Doubler or Inverter | 1µ | $2.00 (LT1054LCS8#PBF) |
| 13 | LT1054 | 3.5 | 15 | 100m | Adj | 2.5m | Charge Pump, Doubler or Inverter | 1µ | $2.65 (LT1054CN8#PBF) |
| 14 | LTC1044S8 | 1.5 | 9 | 20m | 0.5Vin, 2Vin, -Vin | 200µ | Industry Standard (7660) Charge Pump in SO-8 Package | 1.5µ | $2.25 (LTC1044CS8#PBF) |
| 15 | LTC1044 | 1.5 | 9 | 20m | 0.5Vin, 2Vin, -Vin | 200µ | Switched Capacitor Voltage Converter | 1.5µ | $1.65 (LTC1044CN8#PBF) |
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