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Analog Devices LT3745EUJ-1#PBF — Analog & Data Acquisition

LT3745EUJ-1#PBF 16-Channel Buck LED Driver Controller

MPNLT3745EUJ-1#PBF
End of Life

Analog Devices LT3745EUJ-1#PBF, DC DC Controller, Buck topology, 16 outputs, 75mA per channel, PWM dimming, 200kHz~1MHz, 40-QFN (6x6), -40°C to 125°C.

$13.13Ref. price · indicative, final on quote
Packaging40-WFQFN Exposed Pad
RoHSROHS3 Compliant
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

LT3745EUJ-1#PBF specifications
ParameterValue
TypeDC DC Controller
MountingSurface Mount
Voltage - output36V
Voltage55V
Current - output (Channel)75mA
Frequency200kHz ~ 1MHz
I/O channels16
Operating temperature-40°C ~ 125°C (TJ)
DimmingPWM
PackageTube
TopologyStep-Down (Buck)
ApplicationsBacklight, Signage
Case40-WFQFN Exposed Pad
Internal switchNo

Product details

16-channel buck controller for multi-string LED backlighting

It operates as a step-down (buck) topology and delivers up to 75 mA per channel, making it a fit for large-format LCD backlight panels or multi-zone signage where each LED string needs independent current regulation. The controller requires external MOSFETs and inductor(s) — it is not a monolithic driver, so the BOM includes those power-stage components.

The input supply range spans 6 V to 55 V, which covers common automotive and industrial bus voltages (12 V, 24 V, 48 V) without an external pre-regulator. A 55 V max input also means the part can survive load-dump transients on a nominal 48 V rail, though external TVS clamping is still recommended for sustained overvoltage events.

Temperature grade and package — deployment context

Surface-mount assembly is standard, but the exposed pad needs a solder-paste stencil opening matched to the datasheet footprint.

It is RoHS3 compliant.

Frequently asked questions

Does LT3745EUJ-1#PBF require external MOSFETs?

Yes — the LT3745EUJ-1#PBF is a controller with no internal switches. The design requires external MOSFETs and an inductor for each channel or a shared power stage, depending on the topology.