LM2597 Buck Converter overview

Description

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LM2597 is a 40.00 V non-sync Buck Converter from with 0.50 A output current. The maximum 40.00 V input voltage can be regulated down into a 1.23 V to 37.00 V output voltage.

It requires are a typical inductor size of 100.00 µH, a typical external component count of 10 and achieves a peak efficiency of 92 %. Further LM2597 characteristics are a fixed 150 kHz switching frequency and 2 available package option(s): SOIC-8 PDIP-8 .

For the LM2597 replacement search, please select a main parameter tolerance value and adjust the checkboxes for feature match. The product counter within the button shows the number of available equivalents and a click on the replacement button shows all possible replacements within a parametric overview.

ParameterValueReplacement
Search Filter
V-IN min. 4.50 V
V-IN max. 40.00 V
I-OUT? 0.50 A
V-OUT min. 1.23 V
V-OUT max. 37.00 V
V-OUT adjustable V
V-OUT programmable no
sync/non-sync non-sync
Frequency typ. 150 kHz
Frequency fixed
Frequency selectable
ext.clock sync. no
Frequency adj./ ext.clock min.
Frequency adj./ ext.clock max
Softstart yes
Softstart adjustable yes
Tracking no
PG/Power OK yes
Quiescent current max. 10000 µA
Operating min.
Operating max.
Junction min. -40 °C
Junction max. 125 °C
thermal shutdown typ.
Inductor size typ. 100.00 µH
Inductor suggested by Würth Elektronik
Automotive AEC-Q100 no
Light-Load-Mode no
Topology Buck
Peak Efficiency 92 %
Component count min. 10
current limit adjustable no
Nr.of packages 2
CSP
SC70
SOT
MSOP
QFN/DFN
SO/SOIC SOIC-8
SOP
DIP PDIP-8
TO
DDPAK

LM2597 Datasheet

Link to the most up-to-date LM2597 datasheet and the product page for EVM, tools and support information.

LM2597

LM2597 Sample stock and distributor price breaks

LM2597 prices and online available distributors.

OEMSecrets.com
findchips.com

Available Distributors with stock: 0

no online Distributor with LM2597 stock available

Available Distributors with stock: 0

no online Distributor with LM2597 stock available

List of equivalents and alternatives

The following DC/DC Buck Converter are similar to LM2597. Optional, compare LM2597 side-by-side with other Buck Converter via the Comparison function.

Variation Compare Product Manufacturer Package
0% LM2590HV LM2590HV product overviewLM2590HV product overview Texas Instruments TO-263, TO-220-7
0% LM2590HV-AQ-Q1 LM2590HV-AQ-Q1 product overviewLM2590HV-AQ-Q1 product overview Texas Instruments TO-263, TO-220-7
0% LM2597HV LM2597HV product overviewLM2597HV product overview Texas Instruments PDIP-8, SOIC-8
0% LM2598 LM2598 product overviewLM2598 product overview Texas Instruments

Inductor suggestions

Below you can find matching inductors from Wuerth Elektronik calculated on the maximum parameters of LM2597.

V-IN max. 40 V, I-OUT 0.5 A, V-OUT min. 1.23 V, Frequency typ. 150 kHz
Order Code Spec L (µH) IR (A) ISAT (A) RDC (mΩ) L x W x H (mm)
74404042470 47.0 0.6 0.7 620.00 4 x 4 x 1.8
74404052470 47.0 0.8 1.0 521.00 5 x 5 x 2
74404054470 47.0 1.0 1.2 272.00 5 x 5 x 4
744052470 47.0 0.8 0.7 530.00 5.8 x 5.8 x 2
744053470 47.0 0.8 0.7 220.00 5.8 x 5.8 x 3
744062470 47.0 0.7 0.6 260.00 6.8 x 6.8 x 2.5
744065470 47.0 1.4 1.2 167.00 10 x 10 x 3.1
744065560 56.0 1.3 1.1 208.00 10 x 10 x 3.1
74408942470 47.0 0.7 1.0 515.00 4.8 x 4.8 x 3.1
74408942560 56.0 0.5 0.8 780.00 4.8 x 4.8 x 3.1
74408943470 47.0 0.8 1.1 305.00 4.8 x 4.8 x 4.1
74408943560 56.0 0.7 0.9 418.00 4.8 x 4.8 x 4.1
7447462470 47.0 1.2 1.2 220.00 5.5 x 5.5 x 8.5
744773139 39.0 0.8 0.9 418.00 4 x 4.5 x 3.5
744773147 47.0 0.7 0.8 523.00 4 x 4.5 x 3.5
744773156 56.0 0.6 0.8 714.00 4 x 4.5 x 3.5
744775147 47.0 1.2 1.2 134.30 7 x 7.8 x 5.5
744775156 56.0 1.0 1.1 189.00 7 x 7.8 x 5.5
744777139 39.0 1.1 1.2 145.00 7.3 x 7.3 x 4.5
744777147 47.0 1.0 1.1 170.00 7.3 x 7.3 x 4.5
744777156 56.0 0.9 1.1 207.00 7.3 x 7.3 x 4.5
7447779139 39.0 1.1 1.2 145.00 7.3 x 7.3 x 4.5
7447779147 47.0 1.0 1.1 190.00 7.3 x 7.3 x 4.5
7447779156 56.0 0.9 1.1 228.00 7.3 x 7.3 x 4.5
744778139 39.0 1.0 1.1 214.00 7.3 x 7.3 x 3.4
744778147 47.0 0.9 1.0 315.00 7.3 x 7.3 x 3.4
744778156 56.0 0.8 0.9 322.00 7.3 x 7.3 x 3.4
7447785147 47.0 0.9 0.7 500.00 5.9 x 6.2 x 3.3
7447786147 47.0 1.4 0.8 260.00 5.9 x 6.2 x 5.1
7447789139 39.0 1.0 1.1 209.00 7.3 x 7.3 x 3.5
7447789147 47.0 0.9 1.0 315.00 7.3 x 7.3 x 3.5
7447789156 56.0 0.8 0.9 335.00 7.3 x 7.3 x 3.5
7447790470 47.0 1.5 1.1 135.00 6 x 6 x 6.5
744787470 47.0 1.3 1.2 206.00 7.8 x 7 x 5
784773139 39.0 0.8 0.9 418.00 4 x 4.5 x 3.5
784773147 47.0 0.7 0.8 523.00 4 x 4.5 x 3.5
784773156 56.0 0.6 0.8 714.00 4 x 4.5 x 3.5
784774139 39.0 0.9 1.1 215.00 5.2 x 5.8 x 4.85
784774147 47.0 0.9 1.0 260.00 5.2 x 5.8 x 4.85
784774156 56.0 0.8 0.9 298.00 5.2 x 5.8 x 4.85
784775147 47.0 1.2 1.2 134.00 7 x 7.8 x 5.5
784778470 47.0 1.1 1.1 290.00 7.3 x 7.3 x 3.5
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