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LM65645 Datasheet(PDF) 28 Page - Texas Instruments

Part # LM65645
Description  LM656x5 High-Performance, 3V to 65V, Pin Compatible, 2.5A, 3.5A, 4.5A, Industrial, Low EMI, Synchronous Buck Converters
PDF  66 Pages
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Manufacturer  TI2 [Texas Instruments]
Direct Link  https://www.ti.com
Logo TI2 - Texas Instruments

LM65645 Datasheet(HTML) 28 Page - Texas Instruments

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VIN
EN
VCC
SW
BOOT
FB
VIN
VOUT
L
CBOOT
COUT
CIN
CVCC
2 × 4.7µF
0.1µF
1µF
RT
LM656x5-Q1
CHF
GND
PG
MODE
BIAS
Connect as required
2 × 100nF
Figure 8-2. Example Application Circuit for Fixed Output Voltage Mode With LM656x5
Table 8-1. Typical External Components for Fixed Output Voltage Mode
OUTPUT
VOLTAGE
FREQUENCY
FB
LM6xx25
LM6xx35
LM6xx45
L
COUT
L
COUT
L
COUT (1)
3.3V
400kHz
GND
8.2μH
75μF
6.8μH
94μF
5.6μH
110μF
3.3V
2200kHz
GND
1.5μH
20μF
1.5μH
25μF
1.0μH
30μF
5V
400kHz
VCC
10μH
50μF
8.2μH
55μF
8.2μH
70μF
5V
2200kHz
VCC
2.2μH
15μF
1.5μH
20μF
1.5μH
25μF
(1)
Please note all COUT values are the derated output capacitor values in the tables.
Table 8-2. Typical External Components for LM6x635 in Adjustable Output Voltage Mode
OUTPUT
VOLTAGE
FREQUENCY
L
COUT (1)
RFBT
RFBB
CFF
3.3V
400kHz
6.8μH
70μF
100kΩ
31.6kΩ
10pF
5V
400kHz
10μH
60μF
100kΩ
19.1kΩ
15pF
24V
400kHz
47μH
25μF
205kΩ
7.15kΩ
10pF
3.3V
2200kHz
1.2μH
30μF
100kΩ
31.6kΩ
5pF
5V
2200kHz
1.5μH
20μF
100kΩ
19.1kΩ
5pF
24V
2200kHz
5.6μH
10μF
205kΩ
7.15kΩ
5pF
Table 8-3. Typical External Components for LM6x645 in Adjustable Output Voltage Mode
OUTPUT
VOLTAGE
FREQUENCY
L
COUT(1)
RFBT
RFBB
CFF
3.3V
400kHz
5.6μH
80μF
100kΩ
31.6kΩ
15pF
5V
400kHz
8.2μH
70μF
100kΩ
19.1kΩ
15pF
24V
400kHz
22μH
30μF
205kΩ
7.15kΩ
10pF
3.3V
2200kHz
1.2μH
40μF
100kΩ
31.6kΩ
5pF
5V
2200kHz
1.2μH
30μF
100kΩ
19.1kΩ
5pF
LM65625, LM65635, LM65645
SNVSCH3 – JUNE 2025
www.ti.com
28
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Copyright © 2025 Texas Instruments Incorporated
Product Folder Links: LM65625 LM65635 LM65645



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