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Texas Instruments LM3502SQX-16 — DC-DC Power Modules

LM3502SQX-16 DC-DC Boost Regulator, 16V 400mA, Obsolete

MPNLM3502SQX-16
Obsolete

Texas Instruments LM3502SQX-16, DC-DC boost regulator, Step-Up topology, 1 MHz switching frequency, 16 V output, 400 mA switch current, PWM dimming, 16-WFQFN exposed pad package, -40°C to 85°C operating temperature.

Texas Instruments LM3502SQX-16 datasheet (PDF)
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

LM3502SQX-16 specifications
ParameterValue
TypeDC DC Regulator
MountingSurface Mount
Voltage - output16V
Supply voltage5.5V
Current - output (Channel)400mA (Switch)
Frequency1MHz
I/O channels2
Operating temperature-40°C~85°C(TA)
DimmingPWM
PackageTape & Reel (TR)
TopologyStep-Up (Boost)
ApplicationsBacklight
Case16-WFQFN Exposed Pad
Internal switchYes

Product details

Boost regulator for dual-channel LED backlight

The LM3502SQX-16 is a DC-DC step-up (boost) regulator from Texas Instruments, designed specifically for backlight applications. It integrates two outputs with PWM dimming control, switching at 1 MHz to keep external inductor and capacitor values small. The regulator delivers a regulated 16 V output and can handle up to 400 mA on the internal switch, making it suitable for driving series-connected LEDs in small- to medium-size LCD panels.

Supply rails and thermal envelope

For new designs, consider the base product family LM3502 (non-SQX suffix) if still active, or evaluate a current-generation boost converter with similar 16 V, 400 mA, PWM dimming capability. No pin-compatible direct replacement is confirmed in this record.

Frequently asked questions

What is a direct replacement for LM3502SQX-16?

No official direct replacement or pin-compatible successor is recorded for the LM3502SQX-16. The base product number LM3502 (without the SQX suffix) may be a starting point, but its lifecycle status should be verified separately. For a new design, evaluate current-generation boost converters with 16 V output, 400 mA switch current, and PWM dimming.

What is the LM3502SQX-16's listed type and dimming method?

The LM3502SQX-16 is a DC-DC regulator with a step-up (boost) topology. It uses PWM dimming, making it suitable for LED backlight brightness control.