SC415 Datasheet | SEMTECH

Features VIN Range 3-25V Outputs Adjustable from 0.75 to 5.25V, - or Preset Output Voltages: VOUT1 = 1.8 or 1.5V VOUT2 = 1.25 or 1.05V - Low Shutdown Power - Constant On-Time for Fast Dynamic Response .. - Adjustable Switching Frequency - Separated Frequencies for Minimal Switching Interaction: VOUT1 = up to 600k Hz VOUT2 = up to 720k Hz - Power Save or Continuous Operation at Light Load - Adjustable Soft-start Rates for Each Output - Soft-Shutdown for Each Output - Over-Voltage and Under-Voltage Fault Protection - Cycle-by-Cycle Valley Current Limit - DC Current Sense Using Low-Side RDSON Sensing, or RSENSE in Source of Low-Side MOSFET for Greater Accuracy - Separate Power Good Outputs - Separate Enable/Power Save Inputs - 3.1A Non-Overlapping Gate Drive - Smart Drive TM for High-Side MOSFET - MLP 4x4 24 Pin Package - Industrial Temperature Range - - Description The SC415 is a versatile, constant on-time, pseudo fixedfrequency, dual synchronous buck PWM controller intended for notebook puters and other battery operated portable devices. The SC415 contains all the Features needed to provide cost-effective control of two independent switchmode power supplies. The two DC outputs are adjustable from 0.75V to 5.25V. Additional Features for each output include cycle-bycycle current limit, voltage soft-start, under-voltage and over-voltage protection, programmable over-current protection, soft shutdown, selectable power save and non-overlapping gate drive. The SC415 provides two enable/power save inputs, two soft-start inputs, two power good outputs and an on-time adjust input. The constant on-time topology provides fast dynamic response. The excellent transient response means that SC415 based solutions require less output capacitance than peting fixed-frequency converters. Switching frequency is constant until a step in load or line voltage occurs, at which time the pulse density and frequency moves to counter the change in output voltage. After the transient event, the...