Datasheet Linear Technology LTC3879EUD#PBF — 数据表

LTC3879
Fast, Wide Operating
Range No RSENSE
Step-Down Controller
FEATURES DESCRIPTION n The LTC®3879 is a synchronous step-down switching
regulator controller optimized for high switching frequency
and fast transient response. The constant on-time valley
current mode architecture allows for a wide input range,
including very low duty factor operation. No external sense
resistor or slope compensation is required. System flexibility is offered through a user-programmable soft-start pin
and independent RUN pin. The voltage ramping soft-start
function can be programmed with a capacitor or made to
track an external reference source. Wide VIN Range: 4V to 38V
±1% 0.6V Voltage Reference
Extremely Fast Transient Response
tON(MIN): 43ns
No RSENSE™ Valley Current Mode Control
Stable with Low ESR Ceramic COUT
Supports Smooth Start-Up in Pre-Biased Output
Optimized for High Step-Down Ratios
Adjustable Output Voltage Soft-Start or Tracking
Power Good Output Voltage Monitor
Dual N-Channel MOSFET Synchronous Drive …