SC2446A: Not Recommended for New Designs; use SC2447

The SC2446A is a high-frequency dual synchronous stepdown switching power supply controller. It provides out-of-phase output gate signals. The SC2446A operates in synchronous continuous-conduction mode.

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Features

2-Phase synchronous continuous conduction mode for high efficiency step-down converters
Out of phase operation for low input current ripples
Output source and sink currents
Fixed frequency peak current-mode control
50mV/-75mV maximum current sense voltage
Inductive current-sensing for low-cost applications
Optional resistor current-sensing for precise current-limit
Dual outputs or 2-phase single output operation
Excellent current sharing between individual phases
Wide input voltage range: 4.7V to 16V
Individual soft-start, overload shutdown and enable
Duty cycle up to 88%
0.5V feedback voltage for low-voltage outputs
External reference input for DDR applications
Programmable frequency up to 1MHz per phase
External synchronization
Industrial temperature range
28-lead TSSOP lead free package. This product is fully WEEE and RoHS compliant