LM25576MH/NOPB National Semiconductor, LM25576MH/NOPB Datasheet

LM25576MH/NOPB

Manufacturer Part Number

LM25576MH/NOPB

Description

IC BUCK SYNC ADJ 3A 20TSSOP

Manufacturer

National Semiconductor

Series

PowerWise®, SIMPLE SWITCHER®r

Type

Step-Down (Buck)r

Datasheets

1.LM25576MHNOPB.pdf (24 pages)

2.LM25576MHNOPB.pdf (5 pages)

Specifications of LM25576MH/NOPB

Internal Switch(s)

Yes

Synchronous Rectifier

Number Of Outputs

Voltage - Output

1.23 ~ 40 V

Current - Output

Frequency - Switching

200kHz, 485kHz

Voltage - Input

6 ~ 42 V

Operating Temperature

-40°C ~ 125°C

Mounting Type

Surface Mount

Package / Case

20-TSSOP Exposed Pad, 20-eTSSOP, 20-HTSSOP

Power - Output

4.2W

Current, Input Bias

3.4 mA

Current, Output

3 A

Frequency, Oscillator

50 kHz to 1 MHz

Package Type

TSSOP-20EP

Power Dissipation

1.9 W

Regulator Type

Buck, Switching

Resistance, Thermal, Junction To Case

6 °C/W

Temperature, Operating, Range

-40 to +125 °C

Voltage, Gain

70 dB

Voltage, Input

6 to 42 V

Voltage, Offset

0.7 V

Voltage, Output

7.15 V

Primary Input Voltage

42V

No. Of Outputs

Output Voltage

7.45V

Output Current

No. Of Pins

Operating Temperature Range

-40Â°C To +125Â°C

Msl

MSL 1 - Unlimited

Filter Terminals

SMD

Rohs Compliant

Yes

For Use With

LM25576BLDT - WEBENCH BUILD IT BOARD LM25576LM25576EVAL - BOARD EVALUATION FOR LM25576

Lead Free Status / RoHS Status

Lead free / RoHS Compliant

Other names

*LM25576MH
*LM25576MH/NOPB
LM25576MH

Available stocks

Company

Part Number

Manufacturer

Quantity

Price

Company:

Meier Automation Equipment Co., Limited

Part Number:

LM25576MH/NOPB

Manufacturer:

NS/国半

Quantity:

20 000

Current page: 1 of 5
Download datasheet (260Kb)

SIMPLE SWITCHER® 42V, 3A Step-Down Switching

Regulator

General Description

The LM25576 is an easy to use SIMPLE SWITCHER® buck

regulator which allows design engineers to design and opti-

mize a robust power supply using a minimum set of compo-

nents. Operating with an input voltage range of 6 - 42V, the

LM25576 delivers 3A of continuous output current with an in-

tegrated 170mΩ N-Channel MOSFET. The regulator utilizes

an Emulated Current Mode architecture which provides in-

herent 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 operat-

ing frequency is adjustable from 50kHz to 1MHz to allow

optimization of size and efficiency. To reduce EMI, a frequen-

cy synchronization pin allows multiple IC’s from the

LM(2)557x family to self-synchronize or to synchronize to an

external clock. The LM25576 guarantees robustness with cy-

cle-by-cycle current limit, short-circuit protection, thermal

shut-down, and remote shut-down. The device is available in

a power enhanced TSSOP-20 package featuring an exposed

die attach pad for thermal dissipation. The LM25576 is sup-

ported by the full suite of WEBENCH

Simplified Application Schematic

WEBENCH

is a registered trademark of National Semiconductor Corporation.

On-Line design tools.

LM25576/LM25576Q

Features

■

Package

■

Applications

■

LM25576Q is an Automotive Grade product that is AEC-

Q100 grade 1 qualified (−40°C to + 125°C operating

junction temperature)

Integrated 42V, 170mΩ 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

Automotive Grade product datasheet that is AEC-Q100

grade 0 qualified is available upon request.

(−40°C to + 150°C operating junction temperature)

TSSOP-20EP (Exposed Pad)

Automotive

Industrial

20208701

Related parts for LM25576MH/NOPB

LM25576MH/NOPB Summary of contents

Page 1

... The LM25576 is sup- ported by the full suite of WEBENCH Simplified Application Schematic WEBENCH ® registered trademark of National Semiconductor Corporation. LM25576/LM25576Q Features ■ LM25576Q is an Automotive Grade product that is AEC- Q100 grade 1 qualified (−40° 125°C operating junction temperature) ■ ...

Page 2

Connection Diagram Ordering Information Order Number Package Type LM25576MH Exposed Pad TSSOP-20 MXA20A LM25576MHX Exposed Pad TSSOP-20 MXA20A LM25576QMH Exposed Pad TSSOP-20 MXA20A LM25576QMHX Exposed Pad TSSOP-20 MXA20A * Automotive Grade (Q) product incorporates enhanced manufacturing and support processes for ...

Page 3

... Absolute Maximum Ratings If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications GND IN BST to GND PRE to GND SW to GND (Steady State) BST SD GND CC Electrical Characteristics apply over full Operating Junction Temperature range. V Symbol ...

Page 4

Symbol Parameter RAMP GENERATOR Ramp Current 1 Ramp Current 2 PWM COMPARATOR Forced Off-time Min On-time COMP to PWM Comparator Offset ERROR AMPLIFIER Feedback Voltage FB Bias Current DC Gain COMP Sink / Source Current Unity Gain Bandwidth DIODE SENSE ...

Page 5

Physical Dimensions inches (millimeters) unless otherwise noted 20-Lead TSSOP Package NS Package Number MXA20A 22 ...

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