Texas Instruments LM3503ITLX-44/NOPB DC-DC boost regulator, step-up topology, 44V output, dual outputs, 750mA switch current, 1 MHz switching frequency, analog/PWM dimming, 10-TµSMD package, -40°C to 85°C operating temperature.
| Parameter | Value |
|---|---|
| Type | DC DC Regulator |
| Mounting | Surface Mount |
| Voltage - output | 44V |
| Supply voltage | 5.5V |
| Current - output (Channel) | 750mA (Switch) |
| Frequency | 1MHz |
| I/O channels | 2 |
| Operating temperature | -40°C~85°C(TA) |
| Dimming | Analog, PWM |
| Package | Tape & Reel (TR) |
| Topology | Step-Up (Boost) |
| Applications | Backlight |
| Case | 10-WFBGA, DSBGA |
| Internal switch | Yes |
The 1 MHz switching frequency keeps the inductor and output capacitor physically small — a 4.7 µH inductor and 1 µF ceramic cap are typical for a single-LED string. Both analog and PWM dimming are supported, giving the designer flexibility to adjust brightness without audible noise.
Texas Instruments has not published an official replacement for the LM3503ITLX-44/NOPB. For a drop-in alternative, review the LM3503 family (base part number LM3503) for a non-obsolete variant with the same 10-TµSMD footprint and 44 V output rating.