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Texas Instruments LM3502SQ-25/NOPB — Power Management (PMIC / Gate Driver)

LM3502SQ-25/NOPB LED Driver, DC-DC Boost, 25V, 2 Outputs

MPNLM3502SQ-25/NOPB
Obsolete

Texas Instruments LM3502SQ-25/NOPB, DC-DC Regulator, Boost Topology, 1MHz, PWM Dimming, 2 Outputs, 25V Output, 600mA Switch, 16-WFQFN, -40°C to 85°C.

$1.3100Ref. price · indicative, final on quote
Texas Instruments LM3502SQ-25/NOPB datasheet (PDF)
Series*
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

LM3502SQ-25/NOPB specifications
ParameterValue
TypeDC DC Regulator
MountingSurface Mount
Voltage - output25V
Supply voltage5.5V
Current - output (Channel)600mA (Switch)
Frequency1MHz
I/O channels2
Operating temperature-40°C~85°C(TA)
DimmingPWM
PackageTape & Reel (TR); Cut Tape (CT)
TopologyStep-Up (Boost)
ApplicationsBacklight
Case16-WFQFN Exposed Pad
Internal switchYes

Product details

It integrates the switching FET internally, steps up from a 2.5 V to 5.5 V supply rail to a regulated 25 V output, and delivers up to 600 mA switch current across two independently dimmable channels.

Obsolete — sourcing reality for the BOM line

Texas Instruments has marked the LM3502SQ-25/NOPB as Obsolete. For a BOM line that calls out this exact part, the only channel is independent distribution — surplus, new-old-stock, or broker-sourced reels. If you are freezing a design or managing a last-time-buy window, this is the cohort to watch: once the surplus inventory clears, the part becomes unavailable.

Two outputs, 25 V rail — what the ratings mean for the design

The 25 V output drives two LED strings. The 600 mA switch current is the peak through the internal FET.

Frequently asked questions

Is LM3502SQ-25/NOPB obsolete?

Yes, Texas Instruments has marked the LM3502SQ-25/NOPB as Obsolete. There is no official successor order code. For a replacement, you will need to evaluate a different boost LED driver with similar specifications, such as a part from the TLC series, but verify pin compatibility and electrical requirements.

What is the replacement for LM3502SQ-25/NOPB?

Texas Instruments does not list an official replacement for the LM3502SQ-25/NOPB. A functional alternative would need to be a DC-DC boost LED driver with PWM dimming, two outputs, and a 25 V output capability. Parts like the TLC5940RHBR or TLC69611RTWR are linear drivers, not boost regulators, so they are not drop-in substitutes. Evaluate a different boost topology part from the current TI portfolio.

How many outputs does LM3502SQ-25/NOPB have?

The LM3502SQ-25/NOPB has two outputs.

Can I substitute LM3502SQ-25/NOPB with any other LED driver?

A direct substitute would need to be a DC-DC boost regulator with PWM dimming, two outputs, and a 25 V output. The TLC5940RHBR and TLC69611RTWR are linear drivers with different topologies and are not boost converters. No pin-compatible second source is listed. You will need to redesign the boost converter section if switching to a different part.