LT3991-5.0 Buck Converter overview

Description

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Category
Sub-Category

LT3991-5.0 is a 55.00 V non-sync Buck Converter from with 1.20 A output current. The maximum 55.00 V input voltage can be regulated down into a 5.00 V to 5.00 V output voltage.

It requires are a typical inductor size of 12.00 µH, a typical external component count of 6 and achieves a peak efficiency of 89 %. Further LT3991-5.0 characteristics are a adjustable 1000 kHz switching frequency and 2 available package option(s): MSOP-10 DFN-10 .

For the LT3991-5.0 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. 4.30 V
V-IN max. 55.00 V
I-OUT? 1.20 A
V-OUT min. 5.00 V
V-OUT max. 5.00 V
V-OUT 5.000 V
V-OUT programmable no
sync/non-sync non-sync
Frequency typ. 1000 kHz
Frequency adjustable
Frequency selectable
ext.clock sync. yes
Frequency adj./ ext.clock min. 200 kHz
Frequency adj./ ext.clock max 2200 kHz
Softstart yes
Softstart adjustable yes
Tracking no
PG/Power OK yes
Quiescent current max. 4.5 µA
Operating min.
Operating max.
Junction min. -40 °C
Junction max. 125 °C
thermal shutdown typ.
Inductor size typ. 12.00 µH
Inductor suggested by Würth Elektronik
Automotive AEC-Q100 no
Light-Load-Mode yes
Topology Buck
Peak Efficiency 89 %
Component count min. 6
current limit adjustable no
Nr.of packages 2
CSP
SC70
SOT
MSOP MSOP-10
QFN/DFN DFN-10
SO/SOIC
SOP
DIP
TO
DDPAK

LT3991-5.0 Datasheet

Link to the most up-to-date LT3991-5.0 datasheet and the product page for EVM, tools and support information.

LT3991-5.0

LT3991-5.0 Sample stock and distributor price breaks

LT3991-5.0 prices and online available distributors.

OEMSecrets.com
findchips.com

Available Distributors with stock: 7

ARROW-NAC (9)

ProductStockPriceBuy
LT3991EMSE-5#PBF813
14.22 USD
1003.58 USD
Buy Now
LT3991IDD#PBF54
14.69 USD
1003.98 USD
Buy Now
LT3991IDD#PBF24
14.69 USD
1003.98 USD
Buy Now
LT3991IMSE-3.3#PBF58
14.69 USD
1003.98 USD
Buy Now
LT3991EDD#TRPBF7500
25003.63 USD
Buy Now
LT3991IMSE-5#PBF750
14.69 USD
1003.98 USD
Buy Now
LT3991EDD#PBF320
14.22 USD
1003.58 USD
Buy Now
LT3991IMSE#PBF750
14.69 USD
1003.98 USD
Buy Now
LT3991EMSE#PBF69
14.22 USD
1003.58 USD
Buy Now

Chip-One-Stop (14)

ProductStockPriceBuy
LT3991EDD#PBF121
15.38 USD
103.80 USD
503.66 USD
1003.59 USD
Buy Now
LT3991EDD#PBF372
16.68 USD
105.62 USD
255.55 USD
505.30 USD
1005.17 USD
2004.93 USD
Buy Now
LT3991EDD#TRPBF2500
25004.03 USD
Buy Now
LT3991EMSE-3.3#PBF33
16.44 USD
105.42 USD
255.36 USD
Buy Now
LT3991EMSE-5#PBF5
15.67 USD
Buy Now
LT3991EMSE-5#PBF302
16.56 USD
105.52 USD
255.45 USD
505.20 USD
1005.08 USD
2004.85 USD
Buy Now
LT3991EMSE#PBF127
15.72 USD
104.03 USD
503.89 USD
1003.82 USD
Buy Now
LT3991EMSE#PBF6597
16.68 USD
105.62 USD
255.55 USD
505.30 USD
1005.17 USD
2004.93 USD
Buy Now
LT3991EMSE#TRPBF5000
25003.89 USD
Buy Now
LT3991IDD#PBF663
17.14 USD
56.10 USD
105.95 USD
505.61 USD
1005.29 USD
2005.17 USD
Buy Now
LT3991IDD#PBF663
17.14 USD
56.10 USD
105.95 USD
505.61 USD
1005.29 USD
2005.17 USD
Buy Now
LT3991IMSE-5#PBF40
15.98 USD
104.22 USD
Buy Now
LT3991IMSE#PBF50
15.98 USD
104.66 USD
504.25 USD
Buy Now
LT3991IMSE#PBF622
17.14 USD
56.10 USD
105.95 USD
505.61 USD
1005.29 USD
2005.17 USD
Buy Now

DIGI-KEY (7)

ProductStockPriceBuy
LT3991EMSE#PBF5328
16.31 USD
254.22 USD
1003.58 USD
Buy Now
LT3991EDD#PBF2771
16.31 USD
254.22 USD
1003.58 USD
Buy Now
LT3991EMSE-3.3#PBF893
16.31 USD
254.22 USD
1003.58 USD
Buy Now
LT3991EMSE-5#PBF120
16.31 USD
254.22 USD
1003.58 USD
Buy Now
LT3991IMSE#PBF750
17.01 USD
254.69 USD
1003.98 USD
Buy Now
LT3991IMSE-5#PBF475
17.01 USD
254.69 USD
1003.98 USD
Buy Now
LT3991IDD#PBF150
17.01 USD
254.69 USD
1003.98 USD
Buy Now
LT3991EDD#TRPBF0
25003.68 USD
Buy Now
LT3991EMSE#TRPBF0
25003.68 USD
Buy Now
LT3991EMSE-3.3#TRPBF0
25003.68 USD
Buy Now
LT3991EMSE-5#TRPBF0
25003.68 USD
Buy Now
LT3991IMSE-3.3#PBF0
2003.98 USD
Buy Now
LT3991IDD#TRPBF0
25004.08 USD
Buy Now
LT3991IMSE#TRPBF0
25004.08 USD
Buy Now
LT3991IMSE-3.3#TRPBF0
25004.08 USD
Buy Now
LT3991IMSE-5#TRPBF0
25004.08 USD
Buy Now

Element14 (3)

ProductStockPriceBuy
LT3991EDD#PBF209
110.01 USD
256.70 USD
1005.68 USD
Buy Now
LT3991EMSE-5#PBF201
110.01 USD
256.70 USD
1005.68 USD
Buy Now
LT3991EMSE#PBF1074
110.01 USD
256.70 USD
1005.68 USD
Buy Now
LT3991IDD#PBF0
111.20 USD
257.50 USD
1006.36 USD
Buy Now

FARNELL-ELEMENT14 (4)

ProductStockPriceBuy
LT3991EDD#PBF334Buy Now
LT3991EMSE-5#PBF256Buy Now
LT3991EMSE#PBF1110Buy Now
LT3991IDD#PBF15Buy Now

NEWARK (2)

ProductStockPriceBuy
LT3991EDD#PBF91
13.73 USD
Buy Now
LT3991EDD#TRPBF0
16.12 USD
25004.39 USD
Buy Now
LT3991EMSE-3.3#PBF10
13.58 USD
253.58 USD
1003.58 USD
Buy Now
LT3991EMSE-5#PBF0
16.30 USD
254.23 USD
1003.58 USD
Buy Now
LT3991EMSE-5#TRPBF0
16.12 USD
25004.39 USD
Buy Now
LT3991EMSE#PBF0
16.30 USD
254.23 USD
1003.58 USD
Buy Now
LT3991EMSE#TRPBF0
16.12 USD
25004.39 USD
Buy Now
LT3991IDD#PBF0
13.98 USD
253.98 USD
1003.98 USD
Buy Now
LT3991IDD#TRPBF0
16.80 USD
25004.88 USD
Buy Now
LT3991IMSE#PBF0
17.01 USD
254.70 USD
1003.98 USD
Buy Now

RS-COMPONENTS (4)

ProductStockPriceBuy
LT3991EDD#PBF129Buy Now
LT3991EMSE#PBF311Buy Now
LT3991EMSE#PBF100Buy Now
LT3991IMSE#PBF40Buy Now

Available Distributors with stock: 0

no online Distributor with LT3991 stock available

List of equivalents and alternatives

The following DC/DC Buck Converter are similar to LT3991-5.0. Optional, compare LT3991-5.0 side-by-side with other Buck Converter via the Comparison function.

no alternatives found

Inductor suggestions

Below you can find matching inductors from Wuerth Elektronik calculated on the maximum parameters of LT3991-5.0.

V-IN max. 55 V, I-OUT 1.2 A, V-OUT min. 5 V, Frequency typ. 1000 kHz
Order Code Spec L (µH) IR (A) ISAT (A) RDC (mΩ) L x W x H (mm)
74404042100 10.0 1.2 1.5 150.00 4 x 4 x 1.8
74404052075 7.5 1.7 2.1 96.80 5 x 5 x 2
74404052100 10.0 1.6 2.0 109.00 5 x 5 x 2
74404054100 10.0 2.1 2.5 64.00 5 x 5 x 4
74404063082 8.2 2.3 2.5 55.00 6 x 6 x 2.8
74404063100 10.0 2.0 2.2 72.00 6 x 6 x 2.8
74404064120 12.0 2.2 3.0 58.00 6 x 6 x 4.5
744052007 7.5 1.4 1.5 70.00 5.8 x 5.8 x 2
744053008 8.2 2.1 1.6 50.00 5.8 x 5.8 x 3
744062007 7.5 1.7 1.6 50.00 6.8 x 6.8 x 2.5
7440650082 8.2 3.8 2.8 28.50 10 x 10 x 3.1
744065100 10.0 3.0 2.5 40.00 10 x 10 x 3.1
7440690082 8.2 1.7 1.5 99.00 8 x 8 x 1.5
7440700082 8.2 2.2 1.7 70.50 8 x 8 x 2
7440700100 10.0 2.0 1.6 78.00 8 x 8 x 2
744071100 10.0 3.4 2.8 28.00 8 x 8 x 4.6
74408942082 8.2 1.4 2.2 113.00 4.8 x 4.8 x 3.1
74408942100 10.0 1.4 2.1 125.00 4.8 x 4.8 x 3.1
74408943082 8.2 1.8 2.2 70.00 4.8 x 4.8 x 4.1
74408943100 10.0 1.7 2.1 82.00 4.8 x 4.8 x 4.1
74437321082 8.2 1.2 2.1 313.00 4.45 x 4.06 x 1.2
74437324082 8.2 1.6 2.8 158.00 4.45 x 4.06 x 2
74437324100 10.0 1.5 2.4 215.00 4.45 x 4.06 x 2
74438336100 10.0 1.2 2.4 280.00 3 x 3 x 2
7447462100 10.0 2.5 2.6 55.00 5.5 x 5.5 x 8.5
744773082 8.2 1.5 1.8 116.00 4 x 4.5 x 3.5
74477310 10.0 1.5 1.7 118.00 4 x 4.5 x 3.5
744773112 12.0 1.3 1.6 156.00 4 x 4.5 x 3.5
74477510 10.0 2.3 3.0 40.00 7 x 7.8 x 5.5
744775112 12.0 2.2 2.2 41.70 7 x 7.8 x 5.5
74477710 10.0 2.0 2.6 45.00 7.3 x 7.3 x 4.5
744777112 12.0 1.8 2.4 54.00 7.3 x 7.3 x 4.5
7447779008 8.2 2.7 3.0 47.00 7.3 x 7.3 x 4.5
744777910 10.0 2.0 2.6 45.00 7.3 x 7.3 x 4.5
7447779112 12.0 1.8 2.4 50.00 7.3 x 7.3 x 4.5
74477810 10.0 1.8 2.2 68.00 7.3 x 7.3 x 3.4
744778112 12.0 1.7 2.2 76.00 7.3 x 7.3 x 3.4
744778510 10.0 1.9 1.6 100.00 5.9 x 6.2 x 3.3
7447786008 8.2 2.3 2.1 66.00 5.9 x 6.2 x 5.1
744778610 10.0 2.1 1.8 74.00 5.9 x 6.2 x 5.1
744778910 10.0 1.8 2.2 64.00 7.3 x 7.3 x 3.5
7447789112 12.0 1.7 1.9 76.00 7.3 x 7.3 x 3.5
744779100 10.0 1.9 2.1 38.60 6 x 6 x 6.5
744787082 8.2 2.7 2.8 33.00 7.8 x 7 x 5
744787100 10.0 2.6 2.6 36.50 7.8 x 7 x 5
744787120 12.0 2.5 2.4 45.00 7.8 x 7 x 5
784773082 8.2 1.5 1.8 116.00 4 x 4.5 x 3.5
78477310 10.0 1.5 1.7 118.00 4 x 4.5 x 3.5
784773112 12.0 1.3 1.6 156.00 4 x 4.5 x 3.5
78477410 10.0 2.2 2.5 78.00 5.2 x 5.8 x 4.85
784774112 12.0 2.0 1.9 82.00 5.2 x 5.8 x 4.85
78477510 10.0 2.3 3.0 40.00 7 x 7.8 x 5.5
784775112 12.0 2.2 2.2 42.00 7 x 7.8 x 5.5
784777082 8.2 2.0 2.8 97.50 7.3 x 7.3 x 4.3
784777100 10.0 1.9 2.6 105.00 7.3 x 7.3 x 4.3
784778082 8.2 2.2 2.4 86.00 7.3 x 7.3 x 3.5
784778100 10.0 1.9 2.2 105.00 7.3 x 7.3 x 3.5
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