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LTC3853 pdf datasheet (Triple
消耗积分:3 |
格式:rar |
大小:666 |
2008-09-01
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The LTC®3853 is a high performance triple output stepdown
switching regulator controller that drives all N-channel
synchronous power MOSFET stages. Power loss and
supply noise are minimized by operating the output stages
out of phase. The part can be confi gured as a dual phase
controller plus a single phase controller if needed. The
part can also be confi gured to provide a single 3-phase
output for even higher output currents.
A wide 4.5V to 24V (28V maximum) input voltage supply
range encompasses most battery chemistries and
intermediate bus voltages. Phase 3 can regulate output
voltages up to 13.5V. A constant frequency current mode
architecture allows for a phase-lockable frequency up to
750kHz.
Independent TK/SS pins for each output ramps the output
voltages and can be confi gured for coincident or ratiometric
tracking. Current foldback limits MOSFET heat dissipation
during short-circuit conditions. The MODE/PLLIN pin
selects among Burst Mode® operation, pulse-skipping or
continuous inductor current modes.
switching regulator controller that drives all N-channel
synchronous power MOSFET stages. Power loss and
supply noise are minimized by operating the output stages
out of phase. The part can be confi gured as a dual phase
controller plus a single phase controller if needed. The
part can also be confi gured to provide a single 3-phase
output for even higher output currents.
A wide 4.5V to 24V (28V maximum) input voltage supply
range encompasses most battery chemistries and
intermediate bus voltages. Phase 3 can regulate output
voltages up to 13.5V. A constant frequency current mode
architecture allows for a phase-lockable frequency up to
750kHz.
Independent TK/SS pins for each output ramps the output
voltages and can be confi gured for coincident or ratiometric
tracking. Current foldback limits MOSFET heat dissipation
during short-circuit conditions. The MODE/PLLIN pin
selects among Burst Mode® operation, pulse-skipping or
continuous inductor current modes.
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