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LM5145 Datasheet(PDF) 15 Page - Texas Instruments

Part # LM5145
Description  LM25139 42V, Synchronous Buck DC/DC Controller With Dual Random Spread Spectrum for Advanced EMI Mitigation
PDF  60 Pages
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Manufacturer  TI2 [Texas Instruments]
Direct Link  https://www.ti.com
Logo TI2 - Texas Instruments

LM5145 Datasheet(HTML) 15 Page - Texas Instruments

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6.2 Functional Block Diagram
DUAL RANDOM
SPREAD SPECTURM
(DRSS)
BIAS
PLL and
OSCILLATORS
VDDA
CONTROL
HICCUP
FAULT TIMER
512 CYCLES
+
–
+
–
BOOT
UVLO
PG
DELAY
25µs
FB
DECODER
/MUX
Q
Q
R
S
+
–
CBOOT
FPWM/SYNC
RT
HO
SW
LO
PGND
VCC
PG
COMP
FB
VOUT
ISNS
EN
AGND
VCC
VIN
DEM/FPWM
+
VCC
SOFT START
RT AMP and DECODER
PG
PGOV
PGUV
0.735V
DRIVER
DRIVER
DRSS
ENABLE
GAIN = 10
VOUT
VREF 0.8V
ILIM
HICCUP
3.3V
5V
LEVEL
SHIFT
ADAPTIVE
DEADTIME
CLK
COMP/ENABLE
EXTERNAL EA
gm 1.1mS
VREF
0.880V
SS
DEM/FPWM
HICCUP
PWM
CLK
60mV
CURRENT
LIMIT
ILIM
SLOPE
COMP
RAMP
+
+
–
–
1V
+
Enable
Comparator
11µA
VCC
www.ti.com
LM25139
SLVSJ80 – OCTOBER 2025
Copyright © 2025 Texas Instruments Incorporated
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Product Folder Links: LM25139



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