LM5175RHFR集成电路（IC）的PMIC-稳压器-DCDC开关式控制器规格书PDF中文资料

LM5175RHFR属于集成电路（IC）的PMIC-稳压器-DCDC开关式控制器。由德州仪器制造生产的LM5175RHFRDC-DC 开关控制器PMIC（电源管理集成电路）DC 到 DC 开关式控制器是用于高效率电路的稳压 IC，其配置为生成高于（突升或步升）或低于（突降或步降）输入电源的输出电源电压。其他拓扑结构可能包括：降压-升压、反激、正激、Cuk、SEPIC、全桥、半桥和推挽式。这些器件不同于需要最小电压并“烧尽”多余电压的线性稳压器。

1 Features

1• Single Inductor Buck-Boost Controller for Step-

Up/Step-Down DC/DC Conversion

• Wide VIN Range: 3.5 V to 42 V, 60 V Maximum

• Flexible VOUT Range: 0.8 V to 55 V

• VOUT Short Protection

• High Efficiency Buck-Boost Transition

• Adjustable Switching Frequency

• Optional Frequency Sync and Dithering

• Integrated 2-A MOSFET Gate Drivers

• Cycle-by-Cycle Current Limit and Optional Hiccup

• Optional Input or Output Average Current Limiting

• Programmable Input UVLO and Soft-Start

• Power Good and Output Overvoltage Protection

• Selectable CCM or DCM with Pulse Skipping

• Available in HTSSOP-28 and QFN-28 Packages

• Create a Custom Design Using the LM5175 with

the WEBENCH Power Designer

2 Applications

• Automotive Start-Stop Systems

• Backup Battery and Supercapacitor Charging

• Industrial PC Power Supplies

• USB Power Delivery

• LED Lighting

3 Description

The LM5175 is a synchronous four-switch buck-boost

DC/DC controller capable of regulating the output

voltage at, above, or below the input voltage. The

LM5175 operates over a wide input voltage range of

3.5 V to 42 V (60 V maximum) to support a variety of

applications.

The LM5175 employs current-mode control both in

buck and boost modes of operation for superior load

and line regulation. The switching frequency is

programmed by an external resistor and can be

synchronized to an external clock signal.

The device also features a programmable soft-start

function and offers protection features including

cycle-by-cycle current limiting, input undervoltage

lockout (UVLO), output overvoltage protection (OVP),

and thermal shutdown. In addition, the LM5175

features selectable Continuous Conduction Mode

(CCM) or Discontinuous Conduction Mode (DCM)

operation, optional average input or output current

limiting, optional spread spectrum to reduce peak

EMI, and optional hiccup mode protection in

sustained overload conditions.