Datasheet Texas Instruments LM2840-Q1

Manufacturer	Texas Instruments
Series	LM2840-Q1

Datasheets

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Packaging

Parametrics

Parameters / Models	LM2840XQMK/NOPB	LM2840YQMK/NOPB	LM2840YQMKX/NOPB
Control Mode	Current Mode	Current Mode	Current Mode
Duty Cycle(Max), %	94	94	94
Iout(Max), A	0.1	0.1	0.1
Iq(Typ), mA	1.3	1.3	1.3
Operating Temperature Range, C	-40 to 125	-40 to 125	-40 to 125
Package Group	SOT-23-THIN	SOT-23-THIN	SOT-23-THIN
Rating	Automotive	Automotive	Automotive
Regulated Outputs	1	1	1
Special Features	Enable	Enable	Enable
Switching Frequency(Max), kHz	1500	1500	1500
Switching Frequency(Min), kHz	950	950	950
Type	Converter	Converter	Converter
Vin(Max), V	42	42	42
Vin(Min), V	4.5	4.5	4.5
Vout(Max), V	34	34	34
Vout(Min), V	0.765	0.765	0.765

Eco Plan

Application Notes

• Download
  AN-643 EMI/RFI Board Design (Rev. B)
  PDF, 742 Kb, Revision: B, File published: May 3, 2004
  Application Note 643 EMI/RFI Board Design
• Download
  Input and Output Capacitor Selection
  PDF, 219 Kb, File published: Sep 19, 2005
• Download
  AN-1197 Selecting Inductors for Buck Converters (Rev. B)
  PDF, 558 Kb, Revision: B, File published: Apr 23, 2013
  This application report provides design information to help select an off-the-shelf inductor for anycontinuous-mode buck converter application.
• Download
  AN-2155 Layout Tips for EMI Reduction in DC/ DC Converters (Rev. A)
  PDF, 3.6 Mb, Revision: A, File published: Apr 23, 2013
  This application note will explore how the layout of your DC/DC power supply can significantly affect theamount of EMI that it produces. It will discuss several variations of a layout analyze the results andprovide answers to some common EMI questions such whether or not to use a shielded inductor.
• Download
  AN-1566 Techniques for Thermal Analysis of Switching Power Supply Designs (Rev. A)
  PDF, 1.4 Mb, Revision: A, File published: Apr 23, 2013
  This application note provides thermal power analysis techniques for analyzing the power IC.
• Download
  AN-1889 How to Measure the Loop Transfer Function of Power Supplies (Rev. A)
  PDF, 2.7 Mb, Revision: A, File published: Apr 23, 2013
  This application report shows how to measure the critical points of a bode plot with only an audiogenerator (or simple signal generator) and an oscilloscope. The method is explained in an easy to followstep-by-step manner so that a power supply designer can start performing these measurements in a shortamount of time.
• Download
  Semiconductor and IC Package Thermal Metrics (Rev. C)
  PDF, 201 Kb, Revision: C, File published: Apr 19, 2016
• Download
  Low EMI Layout Made SIMPLE With LM43600/1/2/3 and LM46000/1/2 (Rev. A)
  PDF, 512 Kb, Revision: A, File published: Sep 12, 2014
  Printed Circuit Board (PCB) layout for Switched Mode Power Supplies (SMPS) is critical to achieve proper converter operation good thermal performance and excellent radiated EMI performance. Optimized board layout for low radiated EMI is made very simple by the package and pin arrangement of the SIMPLE SWITCHER Synchronous Buck Converter family LM4360x and LM4600x
• Download
  AN-1149 Layout Guidelines for Switching Power Supplies (Rev. C)
  PDF, 82 Kb, Revision: C, File published: Apr 23, 2013
  When designing a high frequency switching regulated power supply layout is very important. Using agood layout can solve many problems associated with these types of supplies. The problems due to a badlayout are often seen at high current levels and are usually more obvious at large input to output voltagedifferentials. Some of the main problems are loss of regulation at high output current
• Download
  AN-1229 SIMPLE SWITCHER PCB Layout Guidelines (Rev. C)
  PDF, 374 Kb, Revision: C, File published: Apr 23, 2013
  This application report provides SIMPLE SWITCHER™ PCB layout guidelines.
• Download
  AN-2162 Simple Success With Conducted EMI From DC-DC Converters (Rev. C)
  PDF, 2.5 Mb, Revision: C, File published: Apr 24, 2013
  Electromagnetic Interference (EMI) is an unwanted effect between two electrical systems as a result ofeither electromagnetic radiation or electromagnetic conduction. EMI is the major adverse effect caused bythe application of switch-mode power supplies (SMPS). In switching power supplies EMI noise isunavoidable due to the switching actions of the semiconductor devices and resulting disconti
• Download
  AN-1246 Stresses in Wide Input DC-DC Converters (Rev. C)
  PDF, 427 Kb, Revision: C, File published: Apr 23, 2013
  This application note discusses stresses in wide input DC-DC converters.
• Download
  AN-1520 A Guide to Board Layout for Best Thermal Resistance for Exposed Packages (Rev. B)
  PDF, 9.2 Mb, Revision: B, File published: Apr 23, 2013
  This thermal application report provides guidelines for the optimal board layout to achieve the best thermalresistance for exposed packages. The thermal resistance between junction-to-ambient (ОёJA) is highlydependent on the PCB (Printed Circuit Board) design factors. This becomes more critical for packageshaving very low thermal resistance between junction-to-case such as exposed pad TSSOP

Model Line

Manufacturer's Classification

• Semiconductors> Power Management> Non-isolated DC/DC Switching Regulator> Step-Down (Buck)> Buck Converter (Integrated Switch)