LT1937 LED Boost Driver overview

Description

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LT1937 is a 1 channel, 10.0 V, 0.02 A/string non-sync LED Boost Driver. It can drive a maximum of 4 LED (~3.5Vfwd) per string, features a fixed 1200 kHz frequency and is available in 2 package option(s): SC-70 TSOT23-5 .

Further characteristics are a feedback voltage of 0.095 V, a typical inductor size of 22.0 uH and a peak efficiency of 84 %.

Parameter and features overview

ParameterValueReplacement
Search Filter
Nr. of Channel 1
V-IN min. 2.5 V
V-IN max. 10.0 V
V-OUT max. 36.0 V
Nr.of LED per string typ. 4
I-OUT/string? 0.02 A
current limit typ. 0.32 A
sync/non-sync non-sync
Frequency typ. 1200 kHz
Frequency fixed
Frequency min.
Frequency max.
Softstart no
Softstart adjustable no
Down-Mode no
Quiescent current max. 2500 uA
Operating min. -40 °C
Operating max. 85 °C
Junction min.
Junction max.
thermal shutdown typ.
Inductor size typ. 22.0 uH
feedback voltage 0.095 V
Automotive AEC-Q100 no
Topology Boost
Peak Efficiency 84 %
Component count min. 5
DC dimming no
PWM dimming yes
PWM frequency min. 1.00 kHz
PWM frequency max. 10.0 kHz
digital dimming no
digital interface no
LED flash no
TxMask no
Nr.of current sources 1
Nr.of package options 2
CSP
SC70 SC-70
SOT TSOT23-5
MSOP
QFN/DFN
SO/SOIC
SOP
DIP

LT1937 Datasheet

Link to the most up-to-date LT1937 datasheet and the product page for EVM, tools and support information.

LT1937

LT1937 inventory, samples and price

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Available Distributors with stock: 0

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List with equivalents & alternatives

The following DC/DC LED Boost driver are similar to LT1937. Optional, compare LT1937 side-by-side with other LED driver via the comparison function.

Variation Compare Product Manufacturer Package
0% SC104 SC104 product overviewSC104 product overview Semtech MLP-8
10% MAX1554 MAX1554 product overviewMAX1554 product overview Maxim TDFN-EP-8
10% TB62752A TB62752A product overviewTB62752A product overview Toshiba SSOP-6
10% TB62752B TB62752B product overviewTB62752B product overview Toshiba SSOP-6
10% TB62755F TB62755F product overviewTB62755F product overview Toshiba SON-6
10% TPS61161-Q1 TPS61161-Q1 product overviewTPS61161-Q1 product overview Texas Instruments SON-6
10% TPS61161A TPS61161A product overviewTPS61161A product overview Texas Instruments SON-6
50% MAX1561 MAX1561 product overviewMAX1561 product overview Maxim TDFN-EP-8
50% MAX1582 MAX1582 product overviewMAX1582 product overview Maxim TQFN-12
50% MAX1599 MAX1599 product overviewMAX1599 product overview Maxim TDFN-EP-8
50% MP1518 MP1518 product overviewMP1518 product overview MPS QFN-8, TSOT23-6
50% MP3204 MP3204 product overviewMP3204 product overview MPS TSOT23-6
50% MP3205 MP3205 product overviewMP3205 product overview MPS TSOT23-6
50% MP3304 MP3304 product overviewMP3304 product overview MPS TSOT23-6
50% XC9116 XC9116 product overviewXC9116 product overview Torex USP-6C, SOT25-5
50% XC9133 XC9133 product overviewXC9133 product overview Torex SOT25-5
50% TPS61160 TPS61160 product overviewTPS61160 product overview Texas Instruments SON-6

Inductor suggestions

Below you can find matching inductors from Wuerth Elektronik calculated on the maximum parameters of LT1937.

V-IN min. 2.5 V, V-OUT max. 36 V, current limit typ. 0.32 A, Frequency typ. 1200 kHz
Order Code Spec L (µH) IR (A) ISAT (A) RDC (mΩ) L x W x H (mm)
74404054010 1.0 4.9 8.0 12.00 5 x 5 x 4
744040630082 0.8 6.0 9.5 10.00 6 x 6 x 2.8
74404063010 1.0 5.2 7.5 10.00 6 x 6 x 2.8
74404063012 1.2 6.2 8.5 11.00 6 x 6 x 2.8
74404064010 1.0 5.1 11.0 11.00 6 x 6 x 4.5
74404064012 1.2 5.4 10.5 10.00 6 x 6 x 4.5
744065001 1.0 8.0 9.5 4.90 10 x 10 x 3.1
74407000082 0.8 6.2 5.5 8.50 8 x 8 x 2
7440710082 0.8 7.3 8.0 7.00 8 x 8 x 4.6
74437324010 1.0 5.0 9.0 22.00 4.45 x 4.06 x 2
74437324012 1.2 4.7 8.5 25.00 4.45 x 4.06 x 2
74437336010 1.0 7.5 11.0 13.00 5.7 x 5.2 x 3
74437336012 1.2 5.9 11.0 14.00 5.7 x 5.2 x 3
74438356010 1.0 7.2 9.0 12.00 4.1 x 4.1 x 2.1
74438356012 1.2 5.8 9.0 15.00 4.1 x 4.1 x 2.1
7447462010 1.0 8.5 8.0 6.00 5.5 x 5.5 x 8.5
744772010 1.0 7.5 10.0 4.70 7.8 x 7.8 x 10
744777001 1.0 6.8 10.2 8.40 7.3 x 7.3 x 4.5
7447779001 1.0 5.3 9.5 10.00 7.3 x 7.3 x 4.5
744778001 1.0 5.4 6.4 9.00 7.3 x 7.3 x 3.4
7447786001 1.0 5.0 5.5 28.00 5.9 x 6.2 x 5.1
7447789001 1.0 5.4 6.4 10.00 7.3 x 7.3 x 3.5
744787012 1.2 4.9 6.0 8.50 7.8 x 7 x 5
784775012 1.2 6.2 8.0 5.00 7 x 7.8 x 5.5
784776012 1.2 7.4 11.0 4.00 9 x 10 x 5.9
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