LM5017SDX/NOPB

The LM5017 is a 100V, 600mA synchronous buck regulator with integrated high-side and low-side MOSFETs. The Constant On-Time (COT) control scheme eliminates loop compensation, delivers excellent transient response, and enables ultra-high step-down ratios. The on-time is inversely proportional to the input voltage, keeping the frequency nearly constant across the entire input voltage range. A high-voltage startup regulator provides bias power for the IC's internal operation and the integrated gate drivers. A peak current limit circuit protects against overload conditions. The UVLO circuit supports independent programming of the input undervoltage threshold and hysteresis. Additional protection features include thermal shutdown and bias supply undervoltage lockout (VCC UVLO). The LM5017 is available in WSON-8 and HSOP PowerPAD-8 plastic packages.

Applications

• Industrial programmable logic controllers (PLC)
• Smart meters
• Telecom primary-side and secondary-side bias
• Low-power isolated DC/DC (Fly-Buck)

Key features

• 7.5V to 100V wide input range
• Integrated 100V high-side and low-side switches
• No Schottky diode required
• Constant on-time control
• No loop compensation required
• Ultra-fast transient response
• Near-constant operating frequency
• Intelligent peak current limiting
• Adjustable output voltage (1.225V reference voltage)
• 2% feedback reference voltage accuracy
• Frequency adjustable up to 1MHz
• Adjustable UVLO
• Remote shutdown
• Thermal shutdown
• Package: WSON-8, SO PowerPAD-8
• Create custom regulator designs with WEBENCH Power Designer