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Texas Instruments LM27964SQ-A/NOPB — Discrete Semiconductors

Texas Instruments LM27964SQ-A/NOPB LED Driver, 7-Ch, 30/80mA

MPNLM27964SQ-A/NOPB
End of Life

Texas Instruments LM27964SQ-A/NOPB DC DC Regulator LED driver, Switched Capacitor (Charge Pump) topology, 7 outputs, I²C dimming, 700kHz, 24-WQFN (4x4).

$2.24Ref. price · indicative, final on quote
Texas Instruments LM27964SQ-A/NOPB datasheet (PDF)
Packaging24-WFQFN Exposed Pad
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

LM27964SQ-A/NOPB specifications
ParameterValue
TypeDC DC Regulator
MountingSurface Mount
Voltage - output2V ~ 4V
Supply voltage5.5V
Current - output (Channel)30mA, 80mA
Frequency700kHz
I/O channels7
Operating temperature-30°C ~ 85°C (TA)
DimmingI²C
PackageBulk
TopologySwitched Capacitor (Charge Pump)
ApplicationsBacklight
Case24-WFQFN Exposed Pad
Internal switchYes

Product details

Charge-pump LED driver with I²C dimming

The Texas Instruments LM27964SQ-A/NOPB is a switched-capacitor (charge pump) DC-DC regulator LED driver designed for backlight applications. It drives up to seven outputs, each capable of 30 mA typical, with two channels rated for 80 mA to support higher-current LEDs like camera flash or indicator lamps. Dimming is controlled via an I²C interface, allowing independent brightness adjustment per channel without additional PWM pins. The 700 kHz switching frequency keeps external capacitors small — typically 1 µF ceramic — and shifts ripple above the audible band.

Supply and output range

The regulated output voltage is programmable via I²C from 2 V to 4 V, matching the forward voltage of white or blue LEDs in series-parallel arrays. Internal switches eliminate the need for an external inductor — the charge pump uses only flying and reservoir capacitors.

Active lifecycle and sourcing

Availability and current pricing confirmed at RFQ.

Frequently asked questions

How can I order LM27964SQ-A/NOPB or check stock?

The LM27964SQ-A/NOPB is an active Texas Instruments part sourced through authorized distribution.

What is the closest functional second-source for LM27964SQ-A/NOPB?

The TLC5940RHBR is a linear LED driver with 16 outputs and shift-register control, but it uses a different topology (linear vs charge pump) and lacks I²C dimming. The TLC69611RTWR is a 16-channel linear driver with PWM dimming but no internal switch. Neither is a drop-in replacement — the LM27964SQ-A/NOPB's charge-pump topology and I²C interface are unique in this comparison set.