SC4609: Low-Input, MHz Operation, High-Efficiency Synchronous Buck

• Asynchronous start up
• Operation to 1 MHz
• BiCMOS voltage-mode PWM controller
• 2.7 V to 5.5 V input voltage range
• Output voltages as low as 0.5 V
• ± 1% reference accuracy
• Sleep mode (Icc = 10 µA typ)
• Adjustable lossless short circuit current limiting
• Combination pulse-by-pulse & hiccup mode current limit
• High-efficiency synchronous switching
• 1 A peak current driver
• External soft start
• 4 mm x 4 mm 12-lead MLP package

Typical Application Circuit

Click diagram to enlarge

• Distributed power architecture
• Servers/workstations
• Local microprocessor core power supplies
• DSP and I/O power supplies
• Battery-powered applications
• Telecommunications equipment
• Data processing applications

MLP-12

• SC4609MLTRT: Lead-Free, RoHS and WEEE Compliant, Package Minimum Tape & Reel Only