The LTC®3255 is a switched-capacitor step-down DC/DC converter that produces a regulated output (2.4V to 12.5V adjustable) from a 4V to 48V input. In applications where the input voltage exceeds twice the output voltage, 2:1 capacitive charge pumping extends output current capability beyond input supply current limits. At no load, Burst Mode® operation cuts VIN quiescent current to 16μA.
With its integrated VIN shunt regulator, the LTC3255 excels in 4mA to 20mA current loop applications. The device enables current multiplication; a 4mA input current can power a 7.4mA load continuously. Alternatively, the LTC3255 serves as a higher efficiency replacement for linear regulators and provides a space-saving inductorfree alternative to buck DC/DC converters.
The LTC3255 withstands reverse-polarity input supplies and output short-circuits without damage. Safety features including current limit and overtemperature protection further enhance robustness. The LTC3255 is available in thermally enhanced 10-lead MSOP and low profile 3mm × 3mm 10-lead DFN packages.
Part Number | Package | Temp | Price(1-99) | Price (1k)* |
---|---|---|---|---|
LTC3255EDD#PBF | 3x3 DFN-10 | E | $3.29 | $2.30 |
LTC3255EDD#TRPBF | 3x3 DFN-10 | E | $2.36 | |
LTC3255EMSE#PBF | MS-10E | E | $3.29 | $2.30 |
LTC3255EMSE#TRPBF | MS-10E | E | $2.36 | |
LTC3255HDD#PBF | 3x3 DFN-10 | H | $4.22 | $2.95 |
LTC3255HDD#TRPBF | 3x3 DFN-10 | H | $3.01 | |
LTC3255HMSE#PBF | MS-10E | H | $4.22 | $2.95 |
LTC3255HMSE#TRPBF | MS-10E | H | $3.01 | |
LTC3255IDD#PBF | 3x3 DFN-10 | I | $3.71 | $2.60 |
LTC3255IDD#TRPBF | 3x3 DFN-10 | I | $2.66 | |
LTC3255IMSE#PBF | MS-10E | I | $3.71 | $2.60 |
LTC3255IMSE#TRPBF | MS-10E | I | $2.66 | |
LTC3255MPDD#PBF | 3x3 DFN-10 | MP | $10.00 | $7.00 |
LTC3255MPDD#TRPBF | 3x3 DFN-10 | MP | $7.06 | |
LTC3255MPMSE#PBF | MS-10E | MP | $10.00 | $7.00 |
LTC3255MPMSE#TRPBF | MS-10E | MP | $7.06 |
Part Number | Description | Price |
---|---|---|
DC2041A | LTC3255EMSE Demo Board | -52V/60V Fault-Protected Step-Down Charge Pump, 4V ≤ VIN ≤ 48V, Vout = 2.5V/3.3V/5V/12V/Adj @ 50mA | $100.00 |