LM5006MM/NOPB

The LM5006 buck switching regulator contains all the features necessary to implement a low-cost, high-efficiency buck bias regulator. This high-voltage regulator integrates an 80V N-channel MOSFET switch and a startup regulator. The device is easy to implement and comes in an MSOP-10 package. The regulator's control scheme is based on an on-time that is inversely proportional to the input voltage (V_IN). This feature keeps the switching frequency relatively constant over line and load variations. The control scheme requires no loop compensation, enabling fast transient response. A forced off-time inversely proportional to the output voltage (V_OUT) provides the controller with intelligent current limiting. This current limiting ensures short-circuit control while offering minimal foldback. Additional features include: thermal shutdown, VCC undervoltage lockout, maximum duty cycle limiter, pre-charge switch, programmable undervoltage detector with status flag output, and gate driver output for synchronous rectifiers.

Applications

• Non-isolated telecom buck regulator
• Medium-to-high voltage post-regulator
• +42V automotive systems

Key features

• Operating input voltage range: 6V to 75V
• Integrated 80V N-channel MOSFET power switch
• Internal startup regulator
• No loop compensation required
• Ultra-fast transient response
• Constant switching frequency under line and load variations
• 2.5V adjustable output voltage
• Accurate internal reference, ±2.5%
• Smart current limiting with reduced foldback
• Programmable input UV detector with status flag output
• Gate output driver for synchronous rectifier
• Pre-charge switch for no-load bootstrap gate drive
• Thermal shutdown