LM5176
SNVSAI1D – JUNE 2017 – REVISED AUGUST 2021
LM5176 55-V Wide VIN Synchronous 4-switch Buck-boost Controller
1 Fea...
LM5176
SNVSAI1D – JUNE 2017 – REVISED AUGUST 2021
LM5176 55-V Wide VIN Synchronous 4-switch Buck-boost Controller
1 Features
Functional Safety-Capable – Documentation available to aid functional safety system design
Single inductor buck-boost controller for step-up/ step-down DC/DC conversion
Wide VIN: 4.2 V (2.5 V with bias) to 55 V (60 V maximum)
Flexible VOUT: 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 over
voltage protection Available in HTSSOP-28 and QFN-28 packages Create a custom design using the LM5176 with the
WEBENCH Power Designer
2 Applications
Industrial PC power supplies USB power delivery Battery-powered systems LED lighting
VIN
3 Description
The LM5176 is a synchronous four-switch buck-boost DC/DC controller capable of regulating the output
voltage at, above, or below the input
voltage. The LM5176 operates over a wide input
voltage range of 4.2 V to 55 V (60-V absolute maximum) to support a variety of applications.
The LM5176 uses 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 ...