Regulated Step-Down 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 provide a small solution footprint and a simpler design. Furthermore, by incorporating spread spectrum technology on-chip, both input and output noise are significantly reduced.
Product Selection Table
Latest Resources
LT Journal
- Aug 2002 Inductorless, Low Noise Step-Down DC/DC Converter Saves Space and Provides Efficient 1.5V Output PDF
- Sep 2003 Inductorless, Efficient Step-Down DC/DC Converter Provides Dual Low Noise Outputs in Space-Constrained Designs PDF
- Dec 2001 No Space? No Problem for these Tiny, Inductorless, Efficient, Low Noise, 1.8V and 1.5V, Step-Down DC/DC Converters PDF
Technical Articles
Videos
Regulated Step-Down 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 | LTC7821 | 1 | 10 | 72 | 25 | - | 500µ | Hybrid Step-Down Synchronous Controller | $5.20 (LTC7821EUH#PBF) |
| 2 | LTC3256 | 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) |
| 3 | LTC3255 | 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) |
| 4 | LTC3252 | 2 | 2.7 | 5.5 | 250m | Adjustable (0.9 to 1.6) | 60µ | Dual Output Spread Spectrum, Ultralow Noise | $2.60 (LTC3252EDE#PBF) |
| 5 | LTC3251 | 1 | 2.7 | 5.5 | 500m | 1.2V, 1.5V, Adj | 9µ | Spread spectrum, ultralow noise, 2-phase operation | $1.95 (LTC3251EMSE#PBF) |
| 6 | LTC3250 | 1 | 3.1 | 5.5 | 250m | 1.2V, 1.5V | 35µ | Low Noise, 85% Efficiency | $1.41 (LTC3250ES6-1.2#TRPBF) |
| 7 | LTC1911 | 1 | 2.7 | 5.5 | 250m | 1.5V, 1.8V | 180µ | Low Noise, 70% Efficiency | $2.34 (LTC1911EMS8-1.5#PBF) |
| 8 | LTC1503-2 | 1 | 2.4 | 6 | 100m | 2V | 25µ | SD Disconnect | $1.70 (LTC1503CS8-2#PBF) |
| 9 | LTC1503-1.8 | 1 | 2.4 | 6 | 100m | 1.8V | 25µ | SD Disconnect | $1.70 (LTC1503CS8-1.8#PBF) |
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