LM25575 - SIMPLE SWITCHER® 42V, 1.5A Step-Down Switching Regulator

	LM25575 - SIMPLE SWITCHER® 42V, 1.5A Step-Down Switching Regulator from the PowerWise® Family

Datasheet	Packaging	Samples & Pricing	Eval. Boards	Design Tools	Reference Designs	Application Notes	Knowledge Base

Features

•	Integrated 42V, 330mΩ N-channel MOSFET
•	Ultra-wide input voltage range from 6V to 42V
•	Adjustable output voltage as low as 1.225V
•	1.5% feedback reference accuracy
•	Operating frequency adjustable between 50kHz and 1MHz with single resistor
•	Master or slave frequency synchronization
•	Adjustable soft-start
•	Emulated current mode control architecture
•	Wide bandwidth error amplifier
•	Built-in protection

General Description

The LM25575 is an easy to use SIMPLE SWITCHER® buck regulator which allows design engineers to design and optimize a robust power supply using a minimum set of components. More...

Typical Application

*click for larger image

Parametric Table expand

Parametric Table collapse

Output Current 1500 mA

Input Min Voltage 6 Volt

Input Max Voltage 42 Volt

Output Min 1.23 Volt

Output Max 40 Volt

Frequency Min 50000 Hz

Frequency Max 1000000 Hz

Efficiency (peak) 88 %

Output Current 1500 mA

Input Min Voltage 6 Volt

Input Max Voltage 42 Volt

Output Min 1.23 Volt

Output Max 40 Volt

Frequency Min 50000 Hz

Frequency Max 1000000 Hz

Efficiency (peak) 88 %

On/Off Pin Yes

Error Flag No

SoftStart Yes

Sync Pin Yes

Inverting Yes

Flyback No

RegType Switching Regulator

Temperature Min -40 deg C

Temperature Max 125 deg C

Adjustable Output Yes

Adj Switch Frequency Yes

PWM Mode Current

Topology Buck

Special Features 1.5% feedback voltage accuracy, emulated current mode

Step-Down Yes

Multiple Output Capability No

Output Power Undefined Watt

Output Voltage Undefined Volt

Output Range 1.23V to 37V

Switching Frequency 1000000 Hz

Regulator Family SIMPLE SWITCHER

AEC Q-100 Automotive Grade Undefined

Automotive Selection Guide Yes

PowerWise Yes

Synchronous Rectification No

View Using Catalog

Typical Performance

*click for larger image

WEBENCH Live Simulation!

LM25575 WEBENCH® Custom Design/Analyze/Build It/Test It
6.00 <=	V in Lower V	<=	V in Upper V	<= 42.00
V out	1.23 <=		V	<= 42.00
I out			A	<= 1.50
Ambient Temperature			°C	<= 100
What are WEBENCH® tools?

Also Recommended

LM25574	42V Input Voltage Max, 0.5A Output Current
LM25576	42V Input Voltage Max, 3A Output Current
LM34910C	50V, 1.25A Step Down COT Switching Regulator
LM34914	40V, 1.25A Step Down COT Switching Regulator
LM5574	75V Input Voltage Max, 0.5A Output Current
LM5575	75V Input Voltage Max, 1.5A Output Current
LM5576	75V Input Voltage Max, 3A Output Current

Additional Resources

Online Seminars

Introduction to Emulated Current Mode (ECM) Control and the new SIMPLE SWITCHER® Buck Regulators

Design Tools (see below)

Application Notes (see below)

Block Diagram

*click for larger image

Datasheet

RoHS Compliance Information	Size in Kbytes	Date
LM25575 SIMPLE SWITCHER® 42V, 1.5A Step-Down Switching Regulator	428 Kbytes	20-Mar-07	View Online Download
LM25575 SIMPLE SWITCHER® 42V, 1.5A Step-Down Switching Regulator (Japanese)	628 Kbytes

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Package Availability, Models, Samples & Pricing

Part Number

Package

Factory Lead Time

Models

Samples &
Electronic
Orders

Budgetary Pricing

Std
Pack
Size

Package
Marking
Format

Type

Pins

Spec.

MSL
Rating

Peak
Reflow

RoHS
Report

CAD
Symbols

Weeks

Qty

$US each

LM25575EVAL

42V, 1.5A Step-Down Switching Regulator

Full production

N/A

$37.50

8 weeks

N/A

LM25575MH

TSSOP EXP PAD

STD

NOPB

260

RoHS

Download

Full production

N/A

1K+

$1.70

rail
of
92

NSUZXYTT
L25575
MH

12 weeks

500

LM25575MHX

TSSOP EXP PAD

STD

NOPB

260

RoHS

Download

Full production

N/A

1K+

$1.70

reel
of
2500

NSUZXYTT
L25575
MH

10 weeks

3000

General Description

The LM25575 is an easy to use SIMPLE SWITCHER® buck regulator which allows design engineers to design and optimize a robust power supply using a minimum set of components. Operating with an input voltage range of 6 - 42V, the LM25575 delivers 1.5A of continuous output current with an integrated 330mΩ N-Channel MOSFET. The regulator utilizes an Emulated Current Mode architecture which provides inherent line regulation, tight load transient response, and ease of loop compensation without the usual limitation of low-duty cycles associated with current mode regulators. The operating frequency is adjustable from 50kHz to 1MHz to allow optimization of size and efficiency. To reduce EMI, a frequency synchronization pin allows multiple IC’s from the LM(2)557x family to self-synchronize or to synchronize to an external clock. The LM25575 guarantees robustness with cycle-by-cycle current limit, short-circuit protection, thermal shut-down, and remote shut-down. The device is available in a power enhanced TSSOP-16 package featuring an exposed die attach pad for thermal dissipation. The LM25575 is supported by the full suite of WEBENCH On-Line design tools.

Design Tools

Title	Size in Kbytes	Date
Current Mode Modeling - Reference Guide	1372 Kbytes	1-Aug-2007	View Online	Download
Understanding and Applying Current-Mode Control Theory	427 Kbytes	8-Jan-2008	View Online	Download
Downloadable LM(2)557x Quick Start SIMPLE SWITCHER Component Calculator	230 Kbytes	28-Jun-2007	View

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Reference Designs

•	RD-128 - LM25576 Reference Design 6-42V input, 5V 3A output

Application Notes

Title	Size in Kbytes	Date
AN-1578: Application Note 1578 LM25575 Evaluation Board	157 Kbytes	18-Mar-07	Download
AN-1578 (Japanese): Application Note 1578 LM25575 Evaluation Board	188 Kbytes
AN-1578 (Chinese): Application Note 1578 LM25575 Evaluation Board	242 Kbytes
AN-1571: Application Note 1571 Quick Start Guide for a 1.5 Amp Buck Regulator Using the LM5575 and LM25575	91 Kbytes	18-Mar-07	Download
AN-1571 (Japanese): Application Note 1571 Quick Start Guide for a 1.5 Amp Buck Regulator Using the LM5575 and LM25575	143 Kbytes
AN-1571 (Chinese): Application Note 1571 Quick Start Guide for a 1.5 Amp Buck Regulator Using the LM5575 and LM25575	222 Kbytes

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More Application Notes

Title	Size in Kbytes	Date
AN-1566: Application Note 1566 Techniques for Thermal Analysis of Switching Power Supply Designs	370 Kbytes	7-Feb-07	Download
AN-1566 (Japanese): Application Note 1566 Techniques for Thermal Analysis of Switching Power Supply Designs	442 Kbytes
AN-1566 (Chinese): Application Note 1566 Techniques for Thermal Analysis of Switching Power Supply Designs	282 Kbytes
AN-1563: Application Note 1563 Quick Start Guide for a 0.5 Amp Buck Regulator Using The LM5574 and LM25574	89 Kbytes	17-Mar-07	Download
AN-1563 (Japanese): Application Note 1563 Quick Start Guide for a 0.5 Amp Buck Regulator Using The LM5574 and LM25574	135 Kbytes
AN-1563 (Chinese): Application Note 1563 Quick Start Guide for a 0.5 Amp Buck Regulator Using The LM5574 and LM25574	263 Kbytes
AN-1572: Application Note 1572 Quick Start Guide for a 3 Amp Buck Regulator Using the LM5576 and LM25576	91 Kbytes	18-Mar-07	Download
AN-1572 (Japanese): Application Note 1572 Quick Start Guide for a 3 Amp Buck Regulator Using the LM5576 and LM25576	144 Kbytes
AN-1572 (Chinese): Application Note 1572 Quick Start Guide for a 3 Amp Buck Regulator Using the LM5576 and LM25576	224 Kbytes
AN-1579: Application Note 1579 LM25576 Evaluation Board	157 Kbytes	18-Mar-07	Download
AN-1579 (Japanese): Application Note 1579 LM25576 Evaluation Board	190 Kbytes
AN-1579 (Chinese): Application Note 1579 LM25576 Evaluation Board	245 Kbytes
AN-1577: Application Note 1577 LM25574 Evaluation Board	153 Kbytes	18-Mar-07	Download
AN-1577 (Japanese): Application Note 1577 LM25574 Evaluation Board	174 Kbytes
AN-1577 (Chinese): Application Note 1577 LM25574 Evaluation Board	241 Kbytes

If you have trouble printing or viewing PDF file(s), see Printing Problems.

[Information as of 6-Oct-2008]