The LTC3827-1 is a high-performance dual step-down switching regulator controller with features such as low operating IQ, wide input voltage range, and adjustable output voltage soft-start.
The LTC3827-1 is a high performance dual step-down switching regulator controller that drives all N-channel synchronous power MOSFET stages. It utilizes a constant frequency current mode architecture with a phase-lockable frequency up to 650kHz, minimizing power loss and noise due to input capacitor ESR by operating the two output stages out of phase.
Key features include a precision 0.8V reference, wide input supply range from 4V to 36V, and low shutdown quiescent current of 8uA. The device supports selectable continuous, pulse skipping, or burst mode operation at light loads via the PLLIN/MODE pin. It also includes adjustable output voltage soft-start or tracking, output current foldback limiting, and a power good output voltage monitor.
| Input Supply Voltage Range | 4V to 36V |
|---|---|
| Phase-Lockable Fixed Frequency Range | 140kHz to 650kHz |
| Package Type | 28-Lead SSOP |
The device features a precision 0.8V reference with +1% output voltage accuracy.
The PLLIN/MODE pin selects among Burst Mode operation, pulse skipping mode, or continuous inductor current mode at light loads.