LM5175

Product Folder Sample & Buy Technical Documents Tools & Software Support & Community LM5175 SNVSA37A – OCTOBER 2015 – REVISED MAY 2016 LM5175 42-V Wide VIN Synchronous 4-Switch Buck-Boost Controller 1 Features 1 Single Inductor Buck-Boost Controller for StepUp/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 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 functio...