The LTC3446 is a single-chip triple-output voltage regulator that integrates a 1A synchronous buck regulator and two 300mA ultra-low dropout linear regulators to provide up to three stepped-down output voltages of 3.3V, 1.8V, and 0.8V from a single input voltage.
Design Note 419 introduces the LTC3446, a triple regulator IC designed to generate up to three stepped-down output voltages from a single input voltage. The device combines a 1A synchronous buck regulator with two 300mA very low dropout (VLDO) linear regulators in a tiny 3mm x 4mm DFN package.
| Input Voltage Range | 2.7V to 5.5V |
|---|---|
| Buck Regulator Output Current | 1A |
| VLDO Regulator Output Current | 300mA |
| Package Type | 3mm x 4mm DFN |
| Buck Regulator Frequency | 2.25MHz |
The device accepts an input voltage between 2.7V and 5.5V.
Each very low dropout regulator can supply up to 300mA.