LM34919 - 超小型 40V、600 mA 宽输入电压恒定导通时间降压开关稳压器

LM34919是TI德州仪器公司的一款转换器（集成开关）产品，LM34919是超小型 40V、600 mA 宽输入电压恒定导通时间降压开关稳压器，本站介绍了LM34919的封装应用图解、特点和优点、功能等，并给出了与LM34919相关的TI元器件型号供参考。

LM34919 - 超小型 40V、600 mA 宽输入电压恒定导通时间降压开关稳压器 - 转换器（集成开关） - DC/DC开关稳压器 - 德州仪器

产品描述

The LM34919 Step Down Switching Regulator features all of the functions needed to implement a low cost, efficient, buck bias regulator capable of supplying 0.6A to the load. This buck regulator contains an N-Channel Buck Switch, and is available in a 10-pin DSBGA package. The constant on-time feedback regulation scheme requires no loop compensation, results in fast load transient response, and simplifies 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 results in a smooth transition from constant voltage to constant current mode when current limit is detected, reducing the frequency and output voltage, without the use of foldback. Additional features include: VCC under-voltage lockout, thermal shutdown, gate drive under-voltage lockout, and maximum duty cycle limiter.

产品特性

Integrated N-Channel buck switch
Integrated start-up regulator
Input Voltage Range: 8V to 40V
No loop compensation required
Ultra-Fast transient response
Operating frequency remains constant with load current and input voltage
Maximum switching frequency: 2.0 MHz
Maximum Duty Cycle Limited During Start-Up
Adjustable output voltage
Valley Current Limit At 0.64A
Precision internal reference
Low bias current
Highly efficient operation
Thermal shutdown
10-Pin DSBGA Package

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