Regulated Buck-Boost Charge Pumps
Analog Devices’ family of regulated buck/boost charge pumps accept input voltages above, equal to or below the output voltage and can be used to step-up or step-down an input voltage to a regulated output voltage. By eliminating the inductor, these switched capacitor converters offer alternatives to switching regulator topologies, providing a small solution footprint and a simple design. 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
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Regulated Buck-Boost Charge Pumps
| SortOrder | Part# | Number of Outputs | Vin (min) (V) | Vin (max) (V) | Output Current (typ) (A) | Output Voltage | Isupply (typ) (A) | Comments | Price (1000+) ($ US) |
|---|---|---|---|---|---|---|---|---|---|
| 1 | LTC3246 | 1 | 2.7 | 38 | 500m | 5V or Adjustable (2.5V to 5V), Fixed 3.3V | 20µ | Wide VIN Range Buck-Boost Charge Pump with Watchdog Timer | $3.25 (LTC3246EMSE#PBF) |
| 2 | LTC3245 | 1 | 2.7 | 38 | 250m | 5V or Adjustable (2.5V to 5V), Fixed 3.3V | 18µ | Wide VIN Range, Low Noise, 250mA Buck-Boost Charge Pump | $2.80 (LTC3245EDE#PBF) |
| 3 | LTC3221 | 1 | 1.8 | 5.5 | 60m | 3.3V, 5V, Adj | 8µ | Micropower, Regulated Charge Pump in 2 x 2 DFN | $1.60 (LTC3221EDC#TRPBF) |
| 4 | LTC3240 | 1 | 1.8 | 5.5 | 150m | 2.5V, 3.3V | 65µ | 3.3V/2.5V Step-Up/Step-Down Charge Pump DC/DC Converter | $1.60 (LTC3240EDC-2.5#TRPBF) |
| 5 | LTC3204B-5 | 1 | 2.7 | 5.5 | 150m | 5V | 48µ | Low Noise Regulated Charge Pump in 2 × 2 DFN, Constant Frequency At All Loads | $1.60 (LTC3204BEDC-5#TRPBF) |
| 6 | LTC3204B-3.3 | 1 | 1.8 | 4.5 | 50m | 3.3V | 48µ | Low Noise Regulated Charge Pump in 2 × 2 DFN, Constant Frequency At All Loads | $1.60 (LTC3204BEDC-3.3#TRPBF) |
| 7 | LTC3204-5 | 1 | 2.7 | 5.5 | 150m | 5V | 48µ | Low Noise Regulated Charge Pump in 2 × 2 DFN with Burst Mode | $1.60 (LTC3204EDC-5#TRPBF) |
| 8 | LTC3204-3.3 | 1 | 1.8 | 4.5 | 50m | 3.3V | 48µ | Low Noise Regulated Charge Pump in 2 × 2 DFN with Burst Mode | $1.60 (LTC3204EDC-3.3#TRPBF) |
| 9 | LTC1555L-1.8 | 1 | 2.6 | 6.6 | 20m | 1.8V, 3V, 5V | 32µ | SIM Power Supply & Level Translator | $2.20 (LTC1555LEGN-1.8#PBF) |
| 10 | LTC1555L | 1 | 2.6 | 6.6 | 20m | 3V, 5V | 40µ | SIM Power Supply & Level Translator | $2.00 (LTC1555LEGN#PBF) |
| 11 | LTC1755 | 1 | 2.7 | 6 | 60m | 3V, 5V | 60µ | Universal Smart Card Interface | $2.55 (LTC1755EGN#PBF) |
| 12 | LTC1754-5 | 1 | 2 | 4 | 40m | 5V | 13µ | SD Disconnect | $1.50 (LTC1754ES6-5#TRPBF) |
| 13 | LTC1754-3.3 | 1 | 2 | 4 | 40m | 3.3V | 13µ | SD Disconnect | $1.50 (LTC1754ES6-3.3#TRPBF) |
| 14 | LTC1756 | 1 | 2.7 | 6 | 60m | 3V, 5V | 60µ | Universal Smart Card Interface | $2.30 (LTC1756EGN#PBF) |
| 15 | LTC1517-3.3 | 1 | 2.2 | 4.4 | 15m | 3.3V | 6µ | Micropower, Regulated 3.3V Charge Pump in a 5-Pin SOT-23 Package | $2.00 (LTC1517CS5-3.3#TRPBF) |
| 16 | LTC1556 | 1 | 2.7 | 10 | 20m | 5V | 60µ | SIM Power Supply & Level Translator | $3.35 (LTC1556CGN#PBF) |
| 17 | LTC1555 | 1 | 2.7 | 10 | 20m | 5V | 60µ | SIM Power Supply & Level Translator | $2.85 (LTC1555CGN#PBF) |
| 18 | LTC1515 | 1 | 2.7 | 10 | 50m | 3.3V, 5V | 60µ | Step Up/Down Operation. Power On Reset | $3.50 (LTC1515CS8#PBF) |
| 19 | LTC1514 | 1 | 2.7 | 10 | 50m | 3.3, 5V | 60µ | Step Up/Down Operation. Low Battery Comparator | $3.50 (LTC1514CS8-3.3#PBF) |
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