Datasheet Texas Instruments LM25574MTX/NOPB
| Manufacturer | Texas Instruments |
| Series | LM25574 |
| Part Number | LM25574MTX/NOPB |
42V, 0.5A Step-Down Switching Regulator 16-TSSOP -40 to 125
Datasheets
LM25574 42-V, 0.5-A Step-Down Switching Regulator datasheet
PDF, 996 Kb, Revision: H, File published: Aug 23, 2017
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Status
| Lifecycle Status | Active (Recommended for new designs) |
| Manufacture's Sample Availability | Yes |
Packaging
| Pin | 16 | 16 |
| Package Type | PW | PW |
| Industry STD Term | TSSOP | TSSOP |
| JEDEC Code | R-PDSO-G | R-PDSO-G |
| Package QTY | 2500 | 2500 |
| Carrier | LARGE T&R | LARGE T&R |
| Device Marking | MT | L25574 |
| Width (mm) | 4.4 | 4.4 |
| Length (mm) | 5 | 5 |
| Thickness (mm) | 1 | 1 |
| Pitch (mm) | .65 | .65 |
| Max Height (mm) | 1.2 | 1.2 |
| Mechanical Data | Download | Download |
Parametrics
| Control Mode | Current Mode |
| Duty Cycle(Max) | 95 % |
| Iout(Max) | 0.5 A |
| Iq(Typ) | 1 mA |
| Operating Temperature Range | -40 to 125 C |
| Package Group | TSSOP |
| Rating | Catalog |
| Regulated Outputs | 1 |
| Special Features | Frequency Synchronization |
| Switching Frequency(Max) | 1000 kHz |
| Switching Frequency(Min) | 50 kHz |
| Type | Converter |
| Vin(Max) | 42 V |
| Vin(Min) | 6 V |
| Vout(Max) | 40 V |
| Vout(Min) | 1.23 V |
Eco Plan
| RoHS | Compliant |
Design Kits & Evaluation Modules
- Evaluation Modules & Boards: LM25574EVAL
Evaluation Board for LM25574, 42V, 0.5A Step-Down Switching Regulator
Lifecycle Status: Active (Recommended for new designs)
Application Notes
- Understanding and Applying Current-Mode Control TheoryPDF, 409 Kb, File published: Aug 19, 2007
- 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 - Input and Output Capacitor SelectionPDF, 219 Kb, File published: Sep 19, 2005
- 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. - 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. - 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. - 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. - Semiconductor and IC Package Thermal Metrics (Rev. C)PDF, 201 Kb, Revision: C, File published: Apr 19, 2016
- AN-1997 Error Amplifier Limitations in High-Performance Regulator Applications (Rev. A)PDF, 153 Kb, Revision: A, File published: May 6, 2013
The development of realistic predictions to assist the power supply engineer during the control loop design process is facilitated in this application report by appropriate small-signal and bode plot analysis, the validity of which is verified through simulation results. - 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 - 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 - Quick Start Guide for a 0.5 Amp Buck Regulator Using The LM5574 and LM25574 (Rev. B)PDF, 61 Kb, Revision: B, File published: Apr 23, 2013
The LM5574 and LM25574 switching regulators feature all of the functions necessary to implement anefficient high voltage buck regulator using a minimum of external components. These easy to useregulators include either a 42V (LM25574) or a 75V (LM5574) N-Channel buck switch with an outputcurrent capability of 0.5 Amps. The operating frequency is programmable from 50kHz up to 1MHz.Protectio - 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. - 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 - Overcoming Challenges in Designing Step-Dwn Reg Apps w/40V Input VoltagePDF, 538 Kb, File published: Mar 30, 2007
- 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. - 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
Series: LM25574 (3)
- LM25574MT LM25574MT/NOPB LM25574MTX/NOPB
Manufacturer's Classification
- Semiconductors > Power Management > Non-isolated DC/DC Switching Regulator > Step-Down (Buck) > Buck Converter (Integrated Switch)
