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Texas Instruments LM3500TL-21/NOPB — Power Management (PMIC / Gate Driver)

LM3500TL-21/NOPB DC-DC Boost Regulator

MPNLM3500TL-21/NOPB
Obsolete

Texas Instruments LM3500TL-21/NOPB, DC DC Regulator, Step-Up (Boost), 1MHz, 21V Output, 640mA Switch, 8-DSBGA, -40°C~85°C.

$1.3500Ref. price · indicative, final on quote
Texas Instruments LM3500TL-21/NOPB datasheet (PDF)
Packaging8-WFBGA
RoHSROHS3 Compliant
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

LM3500TL-21/NOPB specifications
ParameterValue
TypeDC DC Regulator
MountingSurface Mount
Voltage - output21V
Supply voltage2.7V
Current - output (Channel)640mA (Switch)
Frequency1MHz
I/O channels1
Operating temperature-40°C~85°C(TA)
PackageTape & Reel (TR); Cut Tape (CT)
TopologyStep-Up (Boost)
ApplicationsBacklight
Case8-WFBGA
Internal switchYes

Product details

Boost regulator for LED backlight — what it does

It integrates the switching FET internally and delivers a regulated 21V output at up to 640mA switch current, switching at 1MHz.

This part is marked Obsolete by Texas Instruments.

The 8-DSBGA (8-WFBGA) is a fine-pitch BGA with solder balls underneath.

The 21V output is fixed — no external resistor divider for adjustment. The 640mA switch current is the peak current the internal FET can handle. At 1MHz switching frequency, the inductor and output capacitor are small, keeping the total solution footprint tight.

Frequently asked questions

Is the LM3500TL-21/NOPB obsolete?

Yes, Texas Instruments lists the LM3500TL-21/NOPB as Obsolete. No official replacement part number is provided. For existing designs, source through surplus or broker channels; for new designs, select a current-production boost regulator.

What is the replacement for LM3500TL-21/NOPB?

No official replacement is listed by Texas Instruments. A functional peer is the LM2703MF-ADJ/NOPB — also a boost regulator for backlight, but with adjustable output (not fixed 21V), 0.35A switch current, and a wider temperature range (-40°C to 125°C). Verify pin compatibility and output voltage requirements before substituting.

What is the price of LM3500TL-21/NOPB?

Pricing is not published here. Submit an RFQ for current market pricing — the part is obsolete, so pricing depends on available surplus inventory.

Is there an alternative to LM3500TL-21/NOPB?

The LM2703MF-ADJ/NOPB is a functional alternative: same boost topology for backlight, adjustable output, 0.35A switch current, and a wider temperature range. Check your output voltage and current requirements before substituting.