LM25011 - 具有可调节电流限制的 42V、2A 宽输入电压恒定导通时间的开关稳压器

LM25011是TI德州仪器公司的一款转换器（集成开关）产品，LM25011是具有可调节电流限制的 42V、2A 宽输入电压恒定导通时间的开关稳压器，本站介绍了LM25011的封装应用图解、特点和优点、功能等，并给出了与LM25011相关的TI元器件型号供参考。

LM25011 - 具有可调节电流限制的 42V、2A 宽输入电压恒定导通时间的开关稳压器 - 转换器（集成开关） - DC/DC开关稳压器 - 德州仪器

产品描述

The LM25011 constant on-time step-down switching regulator features all the functions needed to implement a low-cost, efficient, buck bias regulator capable of supplying up to 2 A of load current. This high-voltage regulator contains an N-Channel Buck switch, a startup regulator, current limit detection, and internal ripple control. The constant on-time regulation principle requires no loop compensation, results in fast load transient response, and simplifies circuit implementation. The operating frequency remains constant with line and load. The adjustable valley current limit detection results in a smooth transition from constant voltage to constant current mode when current limit is reached, without the use of current limit foldback. The PGD output indicates the output voltage has increased to within 5% of the expected regulation value. Additional features include: Low output ripple, VIN under-voltage lock-out, adjustable soft-start timing, thermal shutdown, gate drive pre-charge, gate drive under-voltage lock-out, and maximum duty cycle limit.

The LM25011A has a shorter minimum off-time than the LM25011, which allows for higher frequency operation at low input voltages.

产品特性

LM25011-Q1 is an Automotive Grade Product that is AEC-Q100 Grade 1 Qualified (–40°C to +125°C Operating Junction Temperature)
LM25011A Allows Low-Dropout Operation at High Switching Frequency
Input Operating Voltage Range: 6 V to 42 V
Absolute Maximum Input Rating: 45 V
Integrated 2-A N-Channel Buck Switch
Adjustable Current Limit Allows for Smaller Inductor
Adjustable Output Voltage from 2.51 V
Minimum Ripple Voltage at VOUT
Power Good Output
Switching Frequency Adjustable to 2 MHz
COT Topology Features:
- Switching Frequency Remains Nearly Constant with Load Current and Input Voltage Variations
- Ultra-Fast Transient Response
- No Loop Compensation Required
- Stable Operation with Ceramic Output Capacitors
- Allows for Smaller Output Capacitor and Current Sense Resistor
Adjustable Soft-Start Timing
Thermal Shutdown
Precision 2% Feedback Reference
Package: 10-Pin, HVSSOP

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