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LM284x PWM DC-DC Buck Regulators
Texas Instruments' 100/300/600 mA, 42 V input, step-down DC/DC regulator
Texas Instruments' LM2840, LM2841, and LM2842 are PWM DC/DC buck (step-down) regulators. With a wide input range from 4.5 V to 42 V, they are suitable for a wide range of applications such as power conditioning from unregulated sources. They feature a low RDSON (0.9 Ω typical) internal switch for maximum efficiency (85% typical). Operating frequency is fixed at 550 kHz (X version) and 1.25 MHz (Y version), allowing the use of small external components while still being able to have low output voltage ripple. Soft-start can be implemented using the shutdown pin with an external RC circuit. This allows the user to tailor the soft-start time to a specific application.
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Buck Regulators LM2840 Series
| Abbildung | Hersteller-Teilenummer | Beschreibung | Verfügbare Menge | Preis | ||
|---|---|---|---|---|---|---|
 |  | LM2840XMK-ADJL/NOPB | IC REG BUCK ADJ 100MA TSOT23-6 | 788 - Sofort | $2.95 | Details anzeigen |
|  | LM2840XMKX-ADJL/NOPB | IC REG BUCK ADJ 100MA TSOT23-6 | 0 - Sofort | $1.97 | Details anzeigen |
| | LM2840XQMK/NOPB | IC REG BUCK ADJ 100MA TSOT23-6 | 164 - Sofort | $2.91 | Details anzeigen |
| | LM2840XQMKX/NOPB | IC REG BUCK ADJ 100MA TSOT23-6 | 0 - Sofort | $1.10 | Details anzeigen |
| | LM2840YMK-ADJL/NOPB | IC REG BUCK ADJ 100MA TSOT23-6 | 386 - Sofort | $2.51 | Details anzeigen |
| | LM2840YMKX-ADJL/NOPB | IC REG BUCK ADJ 100MA TSOT23-6 | 0 - Sofort | $1.01 | Details anzeigen |
| | LM2840YQMK/NOPB | IC REG BUCK ADJ 100MA TSOT23-6 | 341 - Sofort | $3.35 | Details anzeigen |
| | LM2840YQMKX/NOPB | IC REG BUCK ADJ 100MA TSOT23-6 | 0 - Sofort | $2.29 | Details anzeigen |
Buck Regulators LM2841 Series
| Abbildung | Hersteller-Teilenummer | Beschreibung | Verfügbare Menge | Preis | ||
|---|---|---|---|---|---|---|
|  | LM2841XMKX-ADJL/NOPB | IC REG BUCK ADJ 300MA SOT23 | 3771 - Sofort | $2.53 | Details anzeigen |
| | LM2841XMK-ADJL/NOPB | IC REG BUCK ADJ 300MA TSOT23-6 | 5498 - Sofort | $2.98 | Details anzeigen |
| | LM2841XQMK/NOPB | IC REG BUCK ADJ 300MA TSOT23-6 | 2203 - Sofort | $2.94 | Details anzeigen |
| | LM2841XQMKX/NOPB | IC REG BUCK ADJ 300MA TSOT23-6 | 0 - Sofort | $1.24 | Details anzeigen |
| | LM2841YMK-ADJL/NOPB | IC REG BUCK ADJ 300MA TSOT23-6 | 259 - Sofort | $2.98 | Details anzeigen |
| | LM2841YMKX-ADJL/NOPB | IC REG BUCK ADJ 300MA TSOT23-6 | 3417 - Sofort | $2.53 | Details anzeigen |
| | LM2841YQMK/NOPB | IC REG BUCK ADJ 300MA TSOT23-6 | 6260 - Sofort | $3.38 | Details anzeigen |
| | LM2841YQMKX/NOPB | IC REG BUCK ADJ 300MA TSOT23-6 | 4019 - Sofort | $2.94 | Details anzeigen |
Buck Regulators LM2842 Series
| Abbildung | Hersteller-Teilenummer | Beschreibung | Verfügbare Menge | Preis | ||
|---|---|---|---|---|---|---|
| | LM2842XQMK/NOPB | IC REG BUCK ADJ 600MA TSOT23-6 | 884 - Sofort | $3.34 | Details anzeigen |
| | LM2842YQMK/NOPB | IC REG BUCK ADJ 600MA TSOT23-6 | 1596 - Sofort | $3.34 | Details anzeigen |
| | LM2842XQMKX/NOPB | IC REG BUCK ADJ 600MA SOT23 | 1020 - Sofort | $2.91 | Details anzeigen |
| | LM2842XMK-ADJL/NOPB | IC REG BUCK ADJ 600MA TSOT23-6 | 919 - Sofort | $2.94 | Details anzeigen |
| | LM2842XMKX-ADJL/NOPB | IC REG BUCK ADJ 600MA TSOT23-6 | 1693 - Sofort | $2.50 | Details anzeigen |
| | LM2842YMK-ADJL/NOPB | IC REG BUCK ADJ 600MA TSOT23-6 | 2570 - Sofort | $2.94 | Details anzeigen |
|  | LM2842YMKX-ADJL/NOPB | IC REG BUCK ADJ 600MA TSOT23-6 | 6385 - Sofort | $2.50 | Details anzeigen |
| | LM2842YQMKX/NOPB | IC REG BUCK ADJ 600MA SOT23 | 0 - Sofort | $2.82 | Details anzeigen |
Evaluation Boards
| Abbildung | Hersteller-Teilenummer | Beschreibung | Verfügbare Menge | Preis | ||
|---|---|---|---|---|---|---|
|  | LM2841YMK-ADJEV/NOPB | EVAL BOARD FOR LM2841 | 2 - Sofort | $47.71 | Details anzeigen |
|  | LM2842XMK-ADJEV/NOPB | EVAL BOARD FOR LM2842 | 1 - Sofort | $47.71 | Details anzeigen |
Veröffentlicht: 2013-04-10
