LM34910集成电路（IC）的稳压器-DC-DC开关稳压器规格书PDF中文资料

LM34910属于集成电路（IC）的稳压器-DC-DC开关稳压器。由美国德州仪器公司制造生产的LM34910稳压器 - DC-DC 开关稳压器DC-DC 开关稳压器 PMIC（电源管理集成电路）产品族中的产品是元器件级设备，用于需要稳定 DC 输入电压和/或将其转换为不同幅度的输出电压的应用。这些器件与称为“控制器”PMIC 的类似产品的区别在于集成了主开关元件，设备提供的电力会通过该元件。

1FEATURES

2• Integrated 40V, N-Channel Buck Switch

• Integrated Start-Up Regulator

• Input Voltage Range: 8V to 36V

• No Loop Compensation Required

• Ultra-Fast Transient Response

• Operating Frequency Remains Constant with

Load Current and Input Voltage

• Maximum Duty Cycle Limited During Start-Up

• Adjustable Output Voltage

• Valley Current Limit At 1.25A

• Precision Internal Reference

• Low Bias Current

• Highly Efficient Operation

• Thermal Shutdown

TYPICAL APPLICATIONS

• High Efficiency Point-Of-Load (POL) Regulator

• Non-Isolated Telecommunication Buck

Regulator

• Secondary High Voltage Post Regulator

DESCRIPTION

The LM34910 Step Down Switching Regulator

features all of the functions needed to implement a

low cost, efficient, buck bias regulator capable of

supplying 1.25A to the load. This buck regulator

contains a 40V N-Channel Buck Switch, and is

available in the thermally enhanced WSON-10 package. The hysteretic 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

current limit detection is set at 1.25A. Additional

features include: VCC under-voltage lockout, thermal

shutdown, gate drive under-voltage lockout, and

maximum duty cycle limiter.

Package

• WSON-10 (4 mm x 4 mm)

• Exposed Thermal Pad For Improved Heat

Dissipation