Key facts
- Model
- LM3501
- Industry
- Industrial
- Documents
- 2
- Languages
- EN
- Last added
- 2012-06-01
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National LM3501 Synchronous Step-up DC/DC Converter Datasheet
The LM3501 is a fixed‑frequency step‑up DC/DC converter designed for driving white LEDs in display backlighting, handheld devices, digital cameras and other portable applications. It operates from a single‑cell Li‑ion or 3‑cell NiMH battery (2.7 V‑7 V) and provides up to 21 V output, suitable for 2‑5 LEDs in series.
Key features include synchronous rectification with no external Schottky diode, a small 8‑bump thin‑film SMD package, true shutdown isolation, input undervoltage lockout, and internal over‑voltage protection. The device is supplied in micro‑SMD packages (TL‑08) with ordering options for 16 V (LM3501‑16) and 21 V (LM3501‑21) versions.
National Semiconductor LM3501 specifications
| Input voltage range | 2.7 V – 7 V |
|---|---|
| Switching frequency | 1 MHz (fixed) |
| Maximum output voltage (LM3501‑16) | 15.5 V |
| Maximum output voltage (LM3501‑21) | 20.5 V |
| Quiescent current (device not FB) | 0.95 µA – 12 µA |
Source: National LM3501 Synchronous Step-up DC/DC Converter Datasheet
All National Semiconductor LM3501 documents by type
Ratings, dimensions and ordering codes, for selection and design work.
Questions answered in these manuals
What is the input voltage range for the LM3501?
The LM3501 operates from 2.7 V to 7 V input.
From: National LM3501 Synchronous Step-up DC/DC Converter Datasheet
How many white LEDs can the LM3501 drive?
It can drive 2‑5 white LEDs in series, and may function with more low‑voltage LEDs.
From: National LM3501 Synchronous Step-up DC/DC Converter Datasheet
What is the input voltage range of the LM3501?
The LM3501 operates with an input voltage from 2.7 V to 7 V.
How many white LEDs can be driven by the LM3501?
It can drive up to three, or four low‑voltage, white LEDs in series.