Description
The LM5018SD/NOPB is a 100-V, 300-mA synchronous stepdown regulator with integrated high-side and low-side MOSFETs. The constant-on-time (COT) control scheme employed in the LM5018SD/NOPB device requires no loop compensation, provides excellent transient response, and enables very low step-down ratios. The on-time varies inversely with the input voltage resulting in nearly constant frequency over the input voltage range. A high-voltage startup regulator provides bias power for internal operation of the IC and for integrated gate drivers.
A peak current limit circuit protects against overload conditions. The undervoltage lockout (UVLO) circuit allows the input undervoltage threshold and hysteresis to be independently programmed. Other protection features include thermal shutdown and bias supply undervoltage lockout.
The LM5018SD/NOPB device is available in WSON-8 and SO PowerPAD-8 plastic packages.
Features
• Wide 7.5- to 100-V Input Range
• Integrated 300-mA High-Side and Low-Side Switches
• No Schottky Required
• Constant On-time Control
• No Loop Compensation Required
• Ultra-Fast Transient Response
• Nearly Constant Operating Frequency
• Intelligent Peak Current Limit
• Adjustable Output Voltage From 1.225 V
• Precision 2% Feedback Reference
• Frequency Adjustable to 1 MHz
• Adjustable Undervoltage Lockout
• Remote Shutdown
• Thermal Shutdown
• Packages:
– WSON-8
– SO PowerPAD™-8
Applications
• Smart Power Meters
• Telecommunication Systems
• Automotive Electronics
• Isolated Bias Supply
Feature
- Wide 7.5- to 100-V Input Range
- Integrated 300-mA High-Side and Low-Side Switches
- No Schottky Required
- Constant On-time Control
- No Loop Compensation Required
- Ultra-Fast Transient Response
- Nearly Constant Operating Frequency
- Intelligent Peak Current Limit
- Adjustable Output Voltage From 1.225 V
- Precision 2% Feedback Reference
- Frequency Adjustable to 1 MHz
- Adjustable Undervoltage Lockout
- Remote Shutdown
- Thermal Shutdown
- Packages:
- WSON-8
- SO PowerPAD?-8
- Create a Custom Design Using the LM5018 With theWEBENCH? PowerDesigner
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DescriptionThe LM5018 is a 100-V, 300-mA synchronous step-down regulator with integrated high-sideand low-side MOSFETs. The constant-on-time (COT) control scheme employed in the LM5018 devicerequires no loop compensation, provides excellent transient response, and enables very lowstep-down ratios. The on-time varies inversely with the input voltage resulting in nearly constantfrequency over the input voltage range. A high-voltage startup regulator provides bias power forinternal operation of the IC and for integrated gate drivers.
A peak current limit circuit protects against overload conditions. The undervoltagelockout (UVLO) circuit allows the input undervoltage threshold and hysteresis to be independentlyprogrammed. Other protection features include thermal shutdown and bias supply undervoltagelockout.
The LM5018 device is available in WSON-8 and SO PowerPAD-8 plastic packages.
