DESCRIPTION
The LM5007SD/NOPB Step Down Switching Regulator features all of the functions needed to implement low cost, efficient, Buck bias regulators. This high voltage regulator contains an 80 V, 0.7A N-Channel Buck Switch. The device is easy to apply and is provided in the MSOP-8 and the thermally enhanced LLP-8 packages. The regulator is based on a hysteretic control scheme using an on time inversely proportional to VIN. This feature allows the operating frequency to remain relatively constant with load and input voltage variations. The hysteretic control requires no control loop compensation, while providing very fast load transient response. An intelligent current limit is implemented in the LM5007SD/NOPB with forced off time that is inversely proportional to VOUT. This current limiting scheme reduces load current foldback. Additional protection features include: Thermal Shutdown, Vcc undervoltage lockout, gate drive undervoltage lockout, and Max Duty Cycle limiter.
FEATURES
· Integrated 80V,0.7A N-Channel Buck Switch
· Internal HV Vcc Regulator
· No Control Loop Compensation Required
· Ultra-Fast Transient Response
· On Time Varies Inversely with Line Voltage
· Operating Frequency Nearly Constant with Varying Line Voltage
· Adjustable Output Voltage
· Highly Efficient Operation
· Precision Reference
· Low Bias Current
· Intelligent Current Limit Protection
· Thermal Shutdown
· External Shutdown Control
TYPICAL APPLICATIONS
·Non-lsolated Buck Regulator
·Secondary High Voltage Post Regulator
·+42V Automotive Systems
Feature
- Versatile Synchronous Buck DC/DC Converter
- Operating Input Voltage Range of 9 V to 75 V
- Integrated 80-V, 0.7-A N-Channel Buck Switch
- Internal High-Voltage VCC Regulator
- Adjustable Output Voltage
- High Efficiency Operation
- Adaptive Constant On-Time Control Architecture
- Ultra-Fast Transient Response
- No Control Loop Compensation Required
- Nearly Constant Switching Frequency
- PWM On-Time Varies Inversely with Input Voltage
- Precision 2.5-V Reference
- Low Input Quiescent Current
- Inherent Protection Features for Robust Design
- Intelligent Current Limit Protection
- VCC and Gate Drive UVLO Protection
- Thermal Shutdown Protection With Hysteresis
- External Shutdown Control
- 8-Pin VSSOP and WSON Packages
- Create a Custom Regulator Design Using WEBENCH Power Designer
(Picture: Pinout)
