The 1A synchronous buck converter provides the main output with high efficiency, typically 85%. The two 300mA VLDO regulators can run off the main output to provide two additional lower voltage outputs. A built-in supply monitor provides a power good indication.
The buck converter switches at 2.25MHz, allowing the use of small surface mount inductors and capacitors. Constant frequency current mode operation produces controlled output spectrum and fast transient response. A mode-select pin allows automatic Burst Mode operation to be enabled for higher efficiency at light load, or disabled for lower noise operation down to very light loads. The two VLDO regulators are stable with ceramic output capacitors as small as 1µF.
Part Number | Package | Temp | Price(1-99) | Price (1k)* |
---|---|---|---|---|
LTC3446EDE#PBF | 4x3 DFN-14 | E | $3.93 | $2.75 |
LTC3446EDE#TRPBF | 4x3 DFN-14 | E | $2.81 | |
LTC3446IDE#PBF | 4x3 DFN-14 | I | $4.71 | $3.30 |
LTC3446IDE#TRPBF | 4x3 DFN-14 | I | $3.36 |
Part Number | Description | Price |
---|---|---|
DC893A | LTC3446EDE Demo Board | 2.9V ≤ VIN ≤ 5.5V, Vout1 = 1.8V @ 400mA, Vout2/Vout3 = 1.2V/1.5V @ 300mA | $100.00 |