Description

The SC2446ITE is a high-frequency dual synchronous stepdown switching power supply controller. It provides out-of-phase high-current output gate drives to all N-channel MOSFET power stages. The SC2446ITE operates in synchronous continuous-conduction mode, making it suitable for generating both VDDQ and the tracking VTT for DDR applications.

Specifications and 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
◆ 75mV/-110mV maximum current sense voltage
◆ Synthesized MOSFET R DS(ON) 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
◆ Buffered V DDQ/2 output
◆ Programmable frequency up to 1 MHz per phase
◆ External synchronization
◆ Industrial temperature range
◆ 28-lead TSSOP - EDP package

Application Scenarios

◆ Telecommunication power supplies
◆ DDR memory power supplies
◆ Graphic power supplies
◆ Servers and base stations