New version DC/DC controller available from Soanar
LTC3811 DC/DC controller
Linear Technology Corporation has introduced LTC3811, a dual output synchronous step-down DC/DC controller with multiphase operation, differential output voltage sensing and integrated phase-lock loop (PLL) synchronisation.
Up to 12 phases can be paralleled and clocked out-of-phase to minimise the input and output filtering requirements for high current applications (up to 200A).
The differential amplifier provides true remote output voltage sensing, enabling high accuracy regulation where IR losses occur through vias, trace runs and interconnects.
Applications include high current ASIC supplies, power distribution buses, high power audio amplifiers and network servers.
The LTC3811 available from Soanar operates with all N-channel MOSFETs from input voltages ranging from 4.5V to 30V and is optimised for low output voltages from 0.6V to 3.3V.
The on-board 0.9 ohm powerful gate drivers minimise MOSFET switching losses and allow the use of multiple MOSFETs connected in parallel for high current applications.
Summary of features: LTC3811
- Multiphase operation – up to 12 phases
- High current – up to 200A
- Wide input voltage range from 4.5V to 30V
- Dual outputs optimised for low voltages from 0.6V to 3.3V
- Fixed programmable operating frequency from 250kHz to 750kHz
- Synchronisable with phase-lock-loop (PLL) from 150kHz to 900kHz
- True differential amplifiers for remote output voltage sensing
- ±0.50% 0.6V VREF accuracy over a -40°C to 85°C
8-Nov-2007