LM2622 is a National Semiconductor 1.6A, 0.2Ω internal switch, 600kHz/1.3MHz frequency selectable step-up DC/DC converter, suitable for TFT display voltage adjustment.
The LM2622 step‑up converter provides selectable switching frequencies of 600 kHz or 1.3 MHz, allowing easy filtering and low‑noise operation. It can boost a 2 V‑12 V input to multiple output levels such as 8 V, –8 V, and 23 V, making it suitable for TFT‑display bias, handheld devices, and portable applications.
The device is supplied in a low‑profile 8‑lead MSOP package and features an external compensation pin for flexible frequency compensation. Detailed electrical characteristics, typical performance graphs, and application circuits are included to aid design and integration.
| Input Voltage Range | 2 V – 12 V |
|---|---|
| Switching Frequency | 600 kHz or 1.3 MHz (pin selectable) |
| Quiescent Current | 1.3 mA – 2.0 mA |
| Feedback Pin Voltage | 1.26 V |
| Package | 8‑lead MSOP (MUA08A) |
| Internal Switch Rating | 1.6 A, 0.2 Ω |
The LM2622 can operate at either 600 kHz or 1.3 MHz, selected by the FSLCT pin.
It is supplied in an 8‑lead MSOP package (MUA08A).
The feedback pin voltage is 1.26 V.
The device operates with an input voltage from 2 V up to 12 V.