Startseite Energiemanagement AC/DC- und DC/DC-Wandler (integrierter FET)

LM2841-Q1

AKTIV

SIMPLE SWITCHER®-Abwärtspannungs-DC/DC-Regler mit 42 V, 300 mA im Thin-SOT-23-Gehäuse

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Selbe Funktionalität wie der verglichene Baustein bei gleicher Anschlussbelegung
TPS560430-Q1 AKTIV Synchroner SIMPLE SWITCHER®-Abwärts-Stromwandler für die Automobilindustrie, 4 V bis 36 V, 0,6 A PFM and PWM selectable options.

Produktdetails

Rating Automotive Topology Buck Iout (max) (A) 0.3 Vin (max) (V) 42 Vin (min) (V) 4.5 Vout (max) (V) 34 Vout (min) (V) 0.765 Features Enable, Fixed soft start, Overcurrent protection Control mode current mode Switching frequency (min) (kHz) 950 Switching frequency (max) (kHz) 1500 Operating temperature range (°C) -40 to 125 Iq (typ) (µA) 1300 Duty cycle (max) (%) 94 Type Converter
Rating Automotive Topology Buck Iout (max) (A) 0.3 Vin (max) (V) 42 Vin (min) (V) 4.5 Vout (max) (V) 34 Vout (min) (V) 0.765 Features Enable, Fixed soft start, Overcurrent protection Control mode current mode Switching frequency (min) (kHz) 950 Switching frequency (max) (kHz) 1500 Operating temperature range (°C) -40 to 125 Iq (typ) (µA) 1300 Duty cycle (max) (%) 94 Type Converter
SOT-23-THN (DDC) 6 8.12 mm² 2.9 x 2.8
  • AEC-Q100-qualified for automotive applications:
    • Temperature grade 1: –40°C to +125°C, TA
  • Input voltage 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)
  • Create a custom design using the LM2840-Q1 (or LM2841-Q1/42-Q1) with the WEBENCH® Power Designer
  • AEC-Q100-qualified for automotive applications:
    • Temperature grade 1: –40°C to +125°C, TA
  • Input voltage 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)
  • Create a custom design using the LM2840-Q1 (or LM2841-Q1/42-Q1) with the WEBENCH® Power Designer

The LM284x-Q1 SIMPLE SWITCHER™ devices are PWM DC/DC buck (step-down) regulators. With an 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 option) and 1.25 MHz (Y option), 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 (SHDN) pin with an external RC circuit allowing the user to tailor the soft-start time to a specific application.

The LM2840-Q1 is optimized for up to 100 mA, the LM2841-Q1 for up to 300 mA, and the LM2842-Q1 for up to 600‑mA load currents. They all have a 0.765-V nominal feedback voltage.

Additional features include: thermal shutdown, VIN undervoltage lockout, and gate-drive undervoltage lockout. The LM284x-Q1 are available in a low-profile SOT-6L package.

The LM284x-Q1 SIMPLE SWITCHER™ devices are PWM DC/DC buck (step-down) regulators. With an 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 option) and 1.25 MHz (Y option), 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 (SHDN) pin with an external RC circuit allowing the user to tailor the soft-start time to a specific application.

The LM2840-Q1 is optimized for up to 100 mA, the LM2841-Q1 for up to 300 mA, and the LM2842-Q1 for up to 600‑mA load currents. They all have a 0.765-V nominal feedback voltage.

Additional features include: thermal shutdown, VIN undervoltage lockout, and gate-drive undervoltage lockout. The LM284x-Q1 are available in a low-profile SOT-6L package.

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Technische Dokumentation

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Typ Titel Datum
* Data sheet LM284x-Q1 Automotive SIMPLE SWITCHER® 4.5-V to 42-V Input, 0.1-, 0.3-, or 0.6-A Output Step-Down DC/DC Regulator in Thin SOT datasheet PDF | HTML 25 Apr 2019
Application note Semiconductor and IC Package Thermal Metrics (Rev. D) PDF | HTML 25 Mär 2024
Application note Low EMI Layout Made SIMPLE With LM43600/1/2/3 and LM46000/1/2 (Rev. A) 12 Sep 2014
Application note AN-2162 Simple Success With Conducted EMI From DC-DC Converters (Rev. C) 24 Apr 2013
Application note AN-1149 Layout Guidelines for Switching Power Supplies (Rev. C) 23 Apr 2013
Application note AN-1197 Selecting Inductors for Buck Converters (Rev. B) 23 Apr 2013
Application note AN-1229 SIMPLE SWITCHER PCB Layout Guidelines (Rev. C) 23 Apr 2013
Application note AN-1246 Stresses in Wide Input DC-DC Converters (Rev. C) 23 Apr 2013
Application note AN-1520 A Guide to Board Layout for Best Thermal Resistance for Exposed Packages (Rev. B) 23 Apr 2013
Application note AN-1566 Techniques for Thermal Analysis of Switching Power Supply Designs (Rev. A) 23 Apr 2013
Application note AN-1889 How to Measure the Loop Transfer Function of Power Supplies (Rev. A) 23 Apr 2013
Application note AN-1982 Small, Wide Input Voltage Range LM2842 Keeps LEDs Cool (Rev. A) 23 Apr 2013
Application note AN-2155 Layout Tips for EMI Reduction in DC/ DC Converters (Rev. A) 23 Apr 2013
Application note Input and Output Capacitor Selection 19 Sep 2005
More literature SEM1600 Topic 4: Constructing Your Power Supply – Layout Considerations 12 Jul 2005
Application note AN-643 EMI/RFI Board Design (Rev. B) 03 Mai 2004

Design und Entwicklung

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Benutzerhandbuch: PDF
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Referenzdesigns

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Test report: PDF
Schaltplan: PDF
Gehäuse Pins CAD-Symbole, Footprints und 3D-Modelle
SOT-23-THN (DDC) 6 Ultra Librarian

Bestellen & Qualität

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