Unregulated Doubling/Inverting Charge Pumps
Analog Devices’ family of 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. By eliminating the inductor, these switched capacitor converters provided small solution footprint and a simpler design. Furthermore, by incorporating spread spectrum technology on-chip, both input and output noise are significantly reduced.
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Application Notes
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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 | -Adj | 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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