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LM5145 Datasheet(PDF) 13 Page - Texas Instruments

Part # LM5145
Description  LM25137 4V to 42V, 100% Duty Cycle Capable, Dual-Channel, Synchronous Buck DC/DC Controller
PDF  73 Pages
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Manufacturer  TI2 [Texas Instruments]
Direct Link  https://www.ti.com
Logo TI2 - Texas Instruments

LM5145 Datasheet(HTML) 13 Page - Texas Instruments

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6.6 Typical Characteristics
VIN = 12V, TJ = 25°C, unless otherwise stated.
Output Current (A)
0
5
10
15
20
70
75
80
85
90
95
100
VIN = 8V
VIN = 12V
VIN = 24V
VIN = 36V
See Figure 8-4
VEN2 = 0V
FSW = 440kHz
Figure 6-1. Efficiency vs Load, 5V Output
Output Current (A)
0
5
10
15
20
70
75
80
85
90
95
100
VIN = 8V
VIN = 12V
VIN = 24V
VIN = 36V
See Figure 8-4
VEN1 = 0V
FSW = 440kHz
Figure 6-2. Efficiency vs Load, 3.3V Output
1ms/DIV
VIN 2V/DIV
VOUT1 1V/DIV
VOUT2 1V/DIV
IOUT2 2A/DIV
See Figure 8-4
5A resistive loads
Figure 6-3. Start-up Characteristic
200µs/DIV
VOUT2 1V/DIV
IOUT2 2A/DIV
VIN 1V/DIV
VOUT1 1V/DIV
See Figure 8-4
5A resistive loads
Figure 6-4. Shutdown Characteristic
100µs/DIV
VOUT1 200mV/DIV
IOUT1 10A/DIV
See Figure 8-4
VOUT1 = 5V
2A/µs slew rate
Figure 6-5. Load Transient Response
400ns/DIV
SW1 5V/DIV
SW2 5V/DIV
See Figure 8-4
IOUT1 = IOUT2 = 10A
Figure 6-6. Switch-Node Voltages
www.ti.com
LM25137
SNVSCU4 – OCTOBER 2025
Copyright © 2025 Texas Instruments Incorporated
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Product Folder Links: LM25137



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