LM25010, LM25010-Q1 42-V, 1-A Step-Down Switching Regulator

LM25010MH/NOPB LM25010MHX/NOPB L25010 HTSSOP Buck Switching Regulator IC

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1 Features

• LM25010-Q1 Qualified for Automotive
Applications
• AEC-Q100 Qualified With the Following Results:
– Device Temperature Grade 1: –40°C to 125°C
Ambient Operating Temperature Range
– Device Temperature Grade 0: –40°C to 150°C
Ambient Operating Temperature Range
– Device HBM ESD Classification Level 2
– Device CDM ESD Classification Level C5
• Wide 6-V to 42-V Input Voltage Range
• Valley Current Limiting at 1.25 A
• Programmable Switching Frequency Up To 1 MHz
• Integrated N-Channel Buck Switch
• Integrated High Voltage Bias Regulator
• No Loop Compensation Required
• Ultra-Fast Transient Response
• Nearly Constant Operating Frequency With Line
and Load Variations
• Adjustable Output Voltage
• 2.5 V, ±2% Feedback Reference
• Programmable Soft Start
• Thermal Shutdown

2 Applications

• Non-Isolated Telecommunications Regulators
• Secondary Side Post Regulators
• Automotive Electronics

3 Description

The LM25010 features all the functions needed to implement a low-cost, efficient, buck regulator capable of supplying in excess of 1-A load current. This high voltage regulator integrates an N-Channel Buck Switch, and is available in thermally enhanced 10-pin WSON and 14-pin HTSSOP packages. The constant ON-time regulation scheme requires no loop compensation resulting in fast load transient response and simplified circuit implementation. The operating frequency remains constant with line and load variations due to the inverse relationship between the input voltage and the ON-time. The valley current limit detection is set at 1.25 A. Additional features include: VCC undervoltage lockout, thermal shutdown, gate drive undervoltage lockout, and maximum duty cycle limiter.