LM284x PWM DC-DC Buck Regulators

Texas Instruments' 100/300/600 mA, 42 V input, step-down DC/DC regulator

LM284x PWM DC/DC Buck RegulatorsTexas 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.

Features
  • Input voltage range of 4.5 V to 42 V
  • Output current options of 100 mA, 300 mA and 600 mA
  • Feedback pin voltage of 0.765 V
  • 550 kHz (X) or 1.25 MHz (Y) switching frequency
  • Low shutdown IQ, 16 µA typical
  • Short circuit protected
  • Internally compensated
  • Soft-start circuitry
  • Small overall solution size (SOT-6L package)

Buck Regulators LM2840 Series

AbbildungHersteller-TeilenummerBeschreibungVerfügbare MengePreis
IC REG BUCK ADJ 100MA TSOT23-6LM2840XMK-ADJL/NOPBIC REG BUCK ADJ 100MA TSOT23-6831 - Sofort$2.92Details anzeigen
IC REG BUCK ADJ 100MA TSOT23-6LM2840XMKX-ADJL/NOPBIC REG BUCK ADJ 100MA TSOT23-60 - Sofort$2.19Details anzeigen
IC REG BUCK ADJ 100MA TSOT23-6LM2840XQMK/NOPBIC REG BUCK ADJ 100MA TSOT23-6517 - Sofort$2.88Details anzeigen
IC REG BUCK ADJ 100MA TSOT23-6LM2840XQMKX/NOPBIC REG BUCK ADJ 100MA TSOT23-60 - Sofort$1.22Details anzeigen
IC REG BUCK ADJ 100MA TSOT23-6LM2840YMK-ADJL/NOPBIC REG BUCK ADJ 100MA TSOT23-6919 - Sofort$2.48Details anzeigen
IC REG BUCK ADJ 100MA TSOT23-6LM2840YMKX-ADJL/NOPBIC REG BUCK ADJ 100MA TSOT23-60 - Sofort$1.12Details anzeigen
IC REG BUCK ADJ 100MA TSOT23-6LM2840YQMK/NOPBIC REG BUCK ADJ 100MA TSOT23-6491 - Sofort$3.31Details anzeigen
IC REG BUCK ADJ 100MA TSOT23-6LM2840YQMKX/NOPBIC REG BUCK ADJ 100MA TSOT23-60 - Sofort$2.54Details anzeigen

Buck Regulators LM2841 Series

AbbildungHersteller-TeilenummerBeschreibungVerfügbare MengePreis
IC REG BUCK ADJ 300MA SOT23LM2841XMKX-ADJL/NOPBIC REG BUCK ADJ 300MA SOT232630 - Sofort$2.72Details anzeigen
IC REG BUCK ADJ 300MA TSOT23-6LM2841XMK-ADJL/NOPBIC REG BUCK ADJ 300MA TSOT23-62556 - Sofort$3.20Details anzeigen
IC REG BUCK ADJ 300MA TSOT23-6LM2841XQMK/NOPBIC REG BUCK ADJ 300MA TSOT23-61336 - Sofort$3.16Details anzeigen
IC REG BUCK ADJ 300MA TSOT23-6LM2841XQMKX/NOPBIC REG BUCK ADJ 300MA TSOT23-60 - Sofort$1.38Details anzeigen
IC REG BUCK ADJ 300MA TSOT23-6LM2841YMK-ADJL/NOPBIC REG BUCK ADJ 300MA TSOT23-61132 - Sofort$3.20Details anzeigen
IC REG BUCK ADJ 300MA TSOT23-6LM2841YMKX-ADJL/NOPBIC REG BUCK ADJ 300MA TSOT23-62012 - Sofort$2.72Details anzeigen
IC REG BUCK ADJ 300MA TSOT23-6LM2841YQMK/NOPBIC REG BUCK ADJ 300MA TSOT23-65282 - Sofort$3.64Details anzeigen
IC REG BUCK ADJ 300MA TSOT23-6LM2841YQMKX/NOPBIC REG BUCK ADJ 300MA TSOT23-65039 - Sofort$3.16Details anzeigen

Buck Regulators LM2842 Series

AbbildungHersteller-TeilenummerBeschreibungVerfügbare MengePreis
IC REG BUCK ADJ 600MA TSOT23-6LM2842XQMK/NOPBIC REG BUCK ADJ 600MA TSOT23-61130 - Sofort$3.59Details anzeigen
IC REG BUCK ADJ 600MA TSOT23-6LM2842YQMK/NOPBIC REG BUCK ADJ 600MA TSOT23-62634 - Sofort$3.59Details anzeigen
IC REG BUCK ADJ 600MA SOT23LM2842XQMKX/NOPBIC REG BUCK ADJ 600MA SOT231240 - Sofort$3.13Details anzeigen
IC REG BUCK ADJ 600MA TSOT23-6LM2842XMK-ADJL/NOPBIC REG BUCK ADJ 600MA TSOT23-63988 - Sofort$3.17Details anzeigen
IC REG BUCK ADJ 600MA TSOT23-6LM2842XMKX-ADJL/NOPBIC REG BUCK ADJ 600MA TSOT23-61956 - Sofort$2.69Details anzeigen
IC REG BUCK ADJ 600MA TSOT23-6LM2842YMK-ADJL/NOPBIC REG BUCK ADJ 600MA TSOT23-62209 - Sofort$3.17Details anzeigen
IC REG BUCK ADJ 600MA TSOT23-6LM2842YMKX-ADJL/NOPBIC REG BUCK ADJ 600MA TSOT23-67288 - Sofort$2.69Details anzeigen
IC REG BUCK ADJ 600MA SOT23LM2842YQMKX/NOPBIC REG BUCK ADJ 600MA SOT230 - Sofort$3.13Details anzeigen

Evaluation Boards

AbbildungHersteller-TeilenummerBeschreibungVerfügbare MengePreis
EVAL BOARD FOR LM2841LM2841YMK-ADJEV/NOPBEVAL BOARD FOR LM28412 - Sofort$50.79Details anzeigen
EVAL BOARD FOR LM2842LM2842XMK-ADJEV/NOPBEVAL BOARD FOR LM28421 - Sofort$50.79Details anzeigen
Veröffentlicht: 2013-04-10