LT1777 Buck Converter overview

Description

Manufacturer
 
Category
Sub-Category

LT1777 is a 48.00 V non-sync Buck Converter from with 0.44 A output current. The maximum 48.00 V input voltage can be regulated down into a 1.24 V to 46.00 V output voltage.

It requires are a typical inductor size of 220.00 µH, a typical external component count of 10 and achieves a peak efficiency of 76 %. Further LT1777 characteristics are a fixed 100 kHz switching frequency and 1 available package option(s): SO-16 .

For the LT1777 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. 7.00 V
V-IN max. 48.00 V
I-OUT? 0.44 A
V-OUT min. 1.24 V
V-OUT max. 46.00 V
V-OUT adjustable V
V-OUT programmable no
sync/non-sync non-sync
Frequency typ. 100 kHz
Frequency fixed
Frequency selectable
ext.clock sync. yes
Frequency adj./ ext.clock min. 100 kHz
Frequency adj./ ext.clock max 250 kHz
Softstart no
Softstart adjustable no
Tracking no
PG/Power OK no
Quiescent current max. 4500 µA
Operating min.
Operating max.
Junction min. -40 °C
Junction max. 125 °C
thermal shutdown typ.
Inductor size typ. 220.00 µH
Inductor suggested by Würth Elektronik
Automotive AEC-Q100 no
Light-Load-Mode no
Topology Buck
Peak Efficiency 76 %
Component count min. 10
current limit adjustable yes
Nr.of packages 1
CSP
SC70
SOT
MSOP
QFN/DFN
SO/SOIC SO-16
SOP
DIP
TO
DDPAK

LT1777 Datasheet

Link to the most up-to-date LT1777 datasheet and the product page for EVM, tools and support information.

LT1777

LT1777 Sample stock and distributor price breaks

LT1777 prices and online available distributors.

OEMSecrets.com
findchips.com

Available Distributors with stock: 6

Chip One Stop (3)

ProductStockPriceBuy
LT1777CS#PBF40
15.74 USD
104.17 USD
Buy Now
LT1777CS#PBF515
15.49 USD
1004.30 USD
Buy Now
LT1777IS#PBF75
16.64 USD
Buy Now

Conrad (1)

ProductStockPriceBuy
LT1777CS#PBF14Buy Now

Digi-Key (3)

ProductStockPriceBuy
LT1777CS#PBF397
15.40 USD
253.59 USD
1002.80 USD
Buy Now
LT1777IS#PBF2576
16.28 USD
254.17 USD
1003.35 USD
Buy Now
DC242A3
1100.50 USD
Buy Now
LT1777CS#TRPBF0
25002.90 USD
Buy Now
LT1777IS#TRPBF0
25003.45 USD
Buy Now

Element14 (2)

ProductStockPriceBuy
LT1777CS#PBF20
18.33 USD
255.53 USD
1004.46 USD
Buy Now
LT1777IS#PBF7
19.68 USD
256.43 USD
1005.19 USD
Buy Now

Farnell Element14 (2)

ProductStockPriceBuy
LT1777CS#PBF20Buy Now
LT1777IS#PBF7Buy Now

RS Components (2)

ProductStockPriceBuy
LT1777CS#PBF72Buy Now
LT1777IS#PBF336Buy Now

Available Distributors without stock: 1

Newark Electronics (0)

ProductStockPriceBuy
LT1777CS#PBF0
15.38 USD
253.56 USD
1002.80 USD
Buy Now
LT1777CS#TRPBF0
14.50 USD
25003.23 USD
Buy Now
LT1777IS#PBF0
16.24 USD
254.12 USD
1003.35 USD
Buy Now

Available Distributors with stock: 7

Arrow Electronics

ProductStockPriceBuy
LT1777CS#PBF 1805
13.10 $
1002.80 $
Buy Now
LT1777IS 740
13.74 $
3512.95 $
9012.64 $
Buy Now
LT1777IS#PBF 70
13.75 $
1003.35 $
Buy Now

Digi-Key

ProductStockPriceBuy
LT1777IS#PBF 2576
1002.84 €
253.54 €
15.33 €
Buy Now
LT1777CS#PBF 397
1002.38 €
253.04 €
14.58 €
Buy Now
DC242A 3
185.27 €
Buy Now
LT1777CS#TRPBF 0
25002.46 €
Buy Now
LT1777IS#TRPBF 0
25002.93 €
Buy Now
show stock=0hide stock=0

Quest Components

ProductStockPriceBuy
LT1777CS 8
64.05 $
25.40 $
18.10 $
Buy Now

element14 Asia-Pacific

ProductStockPriceBuy
LT1777CS#PBF 20
16.66 $
254.42 $
1003.56 $
Buy Now
LT1777IS#PBF 7
17.74 $
255.14 $
1004.15 $
Buy Now

TME Electronic Components

ProductStockPriceBuy
LT1777CS#PBF 7
15.88 $
35.29 $
104.68 $
Buy Now

Chip1Stop

ProductStockPriceBuy
LT1777CS#PBF 40
15.74 $
104.17 $
Buy Now
LT1777CS#PBF 515
15.49 $
1004.30 $
Buy Now
LT1777IS#PBF 75
16.64 $
Buy Now

RS Components

ProductStockPriceBuy
LT1777CS#PBF 72
103.95 GBP
203.78 GBP
303.62 GBP
503.47 GBP
Buy Now
LT1777IS#PBF 336
103.76 GBP
203.72 GBP
303.67 GBP
503.63 GBP
Buy Now

Available Distributors without stock: 2

Newark element14

ProductStockPriceBuy
LT1777CS#TRPBF 0
14.50 $
25003.00 $
Buy Now
LT1777CS#PBF 0
15.38 $
253.56 $
1002.00 $
Buy Now
LT1777IS#PBF 0
16.24 $
254.12 $
1003.00 $
Buy Now

Farnell element14

ProductStockPriceBuy
LT1777CS#PBF 0
14.56 GBP
252.73 GBP
1002.28 GBP
Buy Now
LT1777IS#PBF 0
15.34 GBP
253.22 GBP
1002.73 GBP
Buy Now

List of equivalents and alternatives

The following DC/DC Buck Converter are similar to LT1777. Optional, compare LT1777 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 LT1777.

V-IN max. 48 V, I-OUT 0.44 A, V-OUT min. 1.24 V, Frequency typ. 100 kHz
Order Code Spec L (µH) IR (A) ISAT (A) RDC (mΩ) L x W x H (mm)
74404042680 68.0 0.5 0.6 840.00 4 x 4 x 1.8
74404052101 100.0 0.6 0.6 1,090.00 5 x 5 x 2
74404052680 68.0 0.6 0.9 627.00 5 x 5 x 2
74404054101 100.0 0.7 0.8 560.00 5 x 5 x 4
74404054680 68.0 0.8 1.0 400.00 5 x 5 x 4
74404063101 100.0 0.7 0.7 500.00 6 x 6 x 2.8
74404063680 68.0 0.9 0.9 360.00 6 x 6 x 2.8
74404064101 100.0 0.8 1.0 433.00 6 x 6 x 4.5
744053680 68.0 0.8 0.6 300.00 5.8 x 5.8 x 3
744065101 100.0 1.0 0.9 365.00 10 x 10 x 3.1
744065680 68.0 1.2 1.1 232.00 10 x 10 x 3.1
744065820 82.0 1.1 1.0 323.00 10 x 10 x 3.1
744071101 100.0 1.0 0.9 270.00 8 x 8 x 4.6
744071680 68.0 1.3 1.1 185.00 8 x 8 x 4.6
74408942680 68.0 0.5 0.8 864.00 4.8 x 4.8 x 3.1
74408942820 82.0 0.5 0.7 940.00 4.8 x 4.8 x 3.1
74408943101 100.0 0.5 0.7 770.00 4.8 x 4.8 x 4.1
74408943680 68.0 0.6 0.9 608.00 4.8 x 4.8 x 4.1
74408943820 82.0 0.6 0.8 689.00 4.8 x 4.8 x 4.1
744731680 68.0 1.5 1.0 170.00 7.8 x 7.8 x 7.5
744741101 100.0 1.1 0.9 420.00 8 x 8 x 6
7447462101 100.0 0.8 0.8 450.00 5.5 x 5.5 x 8.5
7447462680 68.0 0.8 1.0 340.00 5.5 x 5.5 x 8.5
744773168 68.0 0.6 0.7 754.00 4 x 4.5 x 3.5
744775168 68.0 1.0 1.1 218.00 7 x 7.8 x 5.5
744775182 82.0 0.9 1.0 208.00 7 x 7.8 x 5.5
74477520 100.0 0.8 0.9 248.20 7 x 7.8 x 5.5
74477620 100.0 1.0 1.1 200.00 9 x 10 x 5.9
744777168 68.0 0.9 1.0 239.00 7.3 x 7.3 x 4.5
744777182 82.0 0.8 0.9 257.00 7.3 x 7.3 x 4.5
74477720 100.0 0.8 0.8 290.00 7.3 x 7.3 x 4.5
7447779168 68.0 0.9 1.0 239.00 7.3 x 7.3 x 4.5
7447779182 82.0 0.8 0.9 250.00 7.3 x 7.3 x 4.5
744777920 100.0 0.8 0.8 290.00 7.3 x 7.3 x 4.5
744778168 68.0 0.7 0.8 417.00 7.3 x 7.3 x 3.4
744778182 82.0 0.7 0.8 479.00 7.3 x 7.3 x 3.4
74477820 100.0 0.6 0.8 585.00 7.3 x 7.3 x 3.4
7447789168 68.0 0.7 0.8 427.00 7.3 x 7.3 x 3.5
7447789182 82.0 0.7 0.8 470.00 7.3 x 7.3 x 3.5
744778920 100.0 0.6 0.8 585.00 7.3 x 7.3 x 3.5
744779168 68.0 1.4 0.7 220.00 6 x 6 x 6.5
744787101 100.0 1.0 0.9 396.00 7.8 x 7 x 5
744787680 68.0 1.1 1.0 246.00 7.8 x 7 x 5
744787820 82.0 1.0 0.9 278.00 7.8 x 7 x 5
784773168 68.0 0.6 0.7 754.00 4 x 4.5 x 3.5
784774168 68.0 0.6 0.9 313.00 5.2 x 5.8 x 4.85
784774182 82.0 0.6 0.7 475.00 5.2 x 5.8 x 4.85
78477420 100.0 0.6 0.7 510.00 5.2 x 5.8 x 4.85
784775168 68.0 1.0 1.1 218.00 7 x 7.8 x 5.5
784775182 82.0 0.9 1.0 248.00 7 x 7.8 x 5.5
78477520 100.0 0.8 0.9 281.00 7 x 7.8 x 5.5
78477620 100.0 1.0 1.1 200.00 9 x 10 x 5.9
784777101 100.0 0.7 0.8 390.00 7.3 x 7.3 x 4.3
784778101 100.0 0.7 0.8 600.00 7.3 x 7.3 x 3.5
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