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LM5175PWPR Datasheet(PDF) 23 Page - Texas Instruments

Part # LM5175PWPR
Description  LM5175 42-V Wide VIN Synchronous 4-Switch Buck-Boost Controller
PDF  43 Pages
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Manufacturer  TI2 [Texas Instruments]
Direct Link  https://www.ti.com
Logo TI2 - Texas Instruments

LM5175PWPR Datasheet(HTML) 23 Page - Texas Instruments

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SENSE(BOOST)
L(PEAK )
170 mV 70%
R
8.2 m
I
u
:
SENSE(BUCK)
OUT(MAX)
76 mV 70%
R
8.8 m
I
u
:
23
LM5175
www.ti.com
SNVSA37A – OCTOBER 2015 – REVISED MAY 2016
Product Folder Links: LM5175
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Copyright © 2015–2016, Texas Instruments Incorporated
The maximum RMS current occurs at D = 0.5, which gives ICIN(RMS) = IOUT/2 = 3 A. A combination of ceramic and
bulk capacitors should be used to provide short path for high di/dt current and to reduce the output voltage ripple.
The complete schematic in Figure 24 is a good starting point for CIN for typical applications.
9.2.2.7 Sense Resistor (RSENSE)
The current sense resistor between the CS and CSG pins should be selected to ensure that current limit is set
high enough for both buck and boost modes of operation. For the buck operation, the current limit resistor is
given by:
(22)
For the boost mode of operation, the current limit resistor is given by:
(23)
The closest standard value of RSENSE = 8 mΩ is selected based on the boost mode operation.



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