The LTC3826-1 is a high performance dual step-down switching regulator controller that drives all N-channel synchronous power MOSFET stages. A constant frequency current mode architecture allows a phase-lockable frequency of up to 650kHz. Power loss and noise due to the ESR of the input capacitor are minimized by operating the two controller output stages out of phase.
The 30µA no-load quiescent current extends operating life in battery powered systems. OPTI-LOOP compensation allows the transient response to be optimized over a wide range of output capacitance and ESR values. The LTC3826-1 features a precision 0.8V reference and a power good output indicator. A wide 4V to 36V input supply range encompasses all battery chemistries.
Independent TRACK/SS pins for each controller ramp the output voltage during start-up. Current foldback limits MOSFET heat dissipation during short-circuit conditions.
The PLLIN/MODE pin selects among Burst Mode operation, pulse skipping mode, or continuous inductor current mode at light loads. For a leadless package version (5mm x 5mm QFN), see the LTC3826 datasheet.
|
PGOOD
|
PolyPhase |
Defeatable Current Foldback |
Package |
| LTC3826 |
2 |
Yes |
Yes |
QFN-32 |
| LTC3826-1 |
1 |
No |
No |
SSOP-28 |
Applications
- Automotive Systems
- Battery-Operated Digital Devices
- Distributed DC Power Systems
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