LM2574DW-ADJR2 datasheet, PDF - EEWORLD Datasheet

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LM2574DW-ADJR2: Description1.8A SWITCHING REGULATOR, 63kHz SWITCHING FREQ-MAX, PDSO16, PLASTIC, SO-16; CategoryPower/power management The power supply circuit; File Size396KB，24 Pages; ManufacturerMotorola ( NXP ); Websitehttps://www.nxp.com

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LM2574DW-ADJR2 Overview

1.8A SWITCHING REGULATOR, 63kHz SWITCHING FREQ-MAX, PDSO16, PLASTIC, SO-16

LM2574DW-ADJR2 Parametric

Parameter Name	Attribute value
Maker	Motorola ( NXP )
Parts packaging code	SOIC
package instruction	SOP,
Contacts	16
Reach Compliance Code	unknown
ECCN code	EAR99
Analog Integrated Circuits - Other Types	SWITCHING REGULATOR
control mode	VOLTAGE-MODE
Control Technology	PULSE WIDTH MODULATION
Maximum input voltage	40 V
Minimum input voltage	4.75 V
Nominal input voltage	12 V
JESD-30 code	R-PDSO-G16
length	10.3 mm
Number of functions	1
Number of terminals	16
Maximum output current	1.8 A
Package body material	PLASTIC/EPOXY
encapsulated code	SOP
Package shape	RECTANGULAR
Package form	SMALL OUTLINE
Certification status	Not Qualified
Maximum seat height	2.65 mm
surface mount	YES
Switch configuration	BUCK
Maximum switching frequency	63 kHz
Terminal form	GULL WING
Terminal pitch	1.27 mm
Terminal location	DUAL
width	7.5 mm

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LM2574

Easy Switcher

™

0.5 A

Step-Down Voltage Regulator

The LM2574 series of regulators are monolithic integrated circuits ideally

suited for easy and convenient design of a step–down switching regulator

(buck converter). All circuits of this series are capable of driving a 0.5 A load

with excellent line and load regulation. These devices are available in fixed

output voltages of 3.3 V, 5.0 V, 12 V, 15 V, and an adjustable output version.

These regulators were designed to minimize the number of external

components to simplify the power supply design. Standard series of

inductors optimized for use with the LM2574 are offered by several different

inductor manufacturers.

Since the LM2574 converter is a switch–mode power supply, its efficiency

is significantly higher in comparison with popular three–terminal linear

regulators, especially with higher input voltages. In most cases, the power

dissipated by the LM2574 regulator is so low, that the copper traces on the

printed circuit board are normally the only heatsink needed and no additional

heatsinking is required.

The LM2574 features include a guaranteed

±4%

tolerance on output

voltage within specified input voltages and output load conditions, and

±10%

on the oscillator frequency (±2% over 0°C to +125°C). External shutdown is

included, featuring 60

µA

(typical) standby current. The output switch

includes cycle–by–cycle current limiting, as well as thermal shutdown for full

protection under fault conditions.

Features

EASY SWITCHER™

0.5 A STEP–DOWN

VOLTAGE REGULATOR

SEMICONDUCTOR

TECHNICAL DATA

DW SUFFIX

PLASTIC PACKAGE

CASE 751G

(SO–16L)

N SUFFIX

PLASTIC PACKAGE

CASE 626

(DIP–8)

PIN CONNECTIONS

Sig Gnd

ON/OFF

Pwr Gnd

•

3.3 V, 5.0 V, 12 V, 15 V, and Adjustable Output Versions

Adjustable Version Output Voltage Range, 1.23 to 37 V

±4%

max over

Line and Load Conditions

Guaranteed 0.5 A Output Current

Wide Input Voltage Range: 4.75 to 40 V

Requires Only 4 External Components

52 kHz Fixed Frequency Internal Oscillator

TTL Shutdown Capability, Low Power Standby Mode

High Efficiency

Uses Readily Available Standard Inductors

Thermal Shutdown and Current Limit Protection

Output

Vin

(Top View)

Sig Gnd

ON/OFF

Pwr Gnd

Output

Vin

(Top View)

* No internal connection, but should be soldered to

PC board for best heat transfer.

Applications

Simple and High–Efficiency Step–Down (Buck) Regulators

Efficient Pre–regulator for Linear Regulators

On–Card Switching Regulators

Positive to Negative Converters (Buck–Boost)

Negative Step–Up Converters

Power Supply for Battery Chargers

DEVICE TYPE/NOMINAL OUTPUT VOLTAGE

LM2574–3.3

LM2574–5

LM2574–12

LM2574–15

LM2574–ADJ

3.3 V

5.0 V

12 V

15 V

1.23 V to 37 V

ORDERING INFORMATION

Device

LM2574DW–ADJ

LM2574N–XX

TA = –40° to +125°C

Operating

Temperature Range

Package

SO–16L

DIP–8

XX = Voltage Option, i.e, 3.3, 5, 12, 15 V; and ADJ for

Adjustable Output.

Motorola, Inc. 1999

Rev 2, 07/1999

LM2574DW-ADJR2 Related Products

	LM2574DW-ADJR2	LM2574N-ADJ	LM2574N-12	LM2574N-15	LM2574N-3.3	LM2574N-5	LM2574DW-ADJ
Description	1.8A SWITCHING REGULATOR, 63kHz SWITCHING FREQ-MAX, PDSO16, PLASTIC, SO-16	1.8A SWITCHING REGULATOR, 63kHz SWITCHING FREQ-MAX, PDIP8, PLASTIC, DIP-8	Switching Regulator, 1.8A, 63kHz Switching Freq-Max, PDIP8, PLASTIC, DIP-8	Switching Regulator, 1.8A, 63kHz Switching Freq-Max, PDIP8, PLASTIC, DIP-8	Switching Regulator, 1.8A, 63kHz Switching Freq-Max, PDIP8, PLASTIC, DIP-8	Switching Regulator, 1.8A, 63kHz Switching Freq-Max, PDIP8, PLASTIC, DIP-8	1.8A SWITCHING REGULATOR, 63kHz SWITCHING FREQ-MAX, PDSO16, PLASTIC, SO-16
package instruction	SOP,	DIP,	DIP,	DIP,	DIP,	DIP,	SOP, SOP16,.4
Reach Compliance Code	unknown	unknown	unknown	unknown	unknown	unknown	unknown
ECCN code	EAR99	EAR99	EAR99	EAR99	EAR99	EAR99	EAR99
Analog Integrated Circuits - Other Types	SWITCHING REGULATOR	SWITCHING REGULATOR	SWITCHING REGULATOR	SWITCHING REGULATOR	SWITCHING REGULATOR	SWITCHING REGULATOR	SWITCHING REGULATOR
Maximum input voltage	40 V	40 V	40 V	40 V	40 V	40 V	40 V
Minimum input voltage	4.75 V	7 V	15 V	18 V	4.75 V	7 V	4.75 V
Nominal input voltage	12 V	12 V	25 V	30 V	12 V	12 V	12 V
JESD-30 code	R-PDSO-G16	R-PDIP-T8	R-PDIP-T8	R-PDIP-T8	R-PDIP-T8	R-PDIP-T8	R-PDSO-G16
length	10.3 mm	9.78 mm	9.78 mm	9.78 mm	9.78 mm	9.78 mm	10.3 mm
Number of functions	1	1	1	1	1	1	1
Number of terminals	16	8	8	8	8	8	16
Maximum output current	1.8 A	1.8 A	1.8 A	1.8 A	1.8 A	1.8 A	1.8 A
Package body material	PLASTIC/EPOXY	PLASTIC/EPOXY	PLASTIC/EPOXY	PLASTIC/EPOXY	PLASTIC/EPOXY	PLASTIC/EPOXY	PLASTIC/EPOXY
encapsulated code	SOP	DIP	DIP	DIP	DIP	DIP	SOP
Package shape	RECTANGULAR	RECTANGULAR	RECTANGULAR	RECTANGULAR	RECTANGULAR	RECTANGULAR	RECTANGULAR
Package form	SMALL OUTLINE	IN-LINE	IN-LINE	IN-LINE	IN-LINE	IN-LINE	SMALL OUTLINE
Certification status	Not Qualified	Not Qualified	Not Qualified	Not Qualified	Not Qualified	Not Qualified	Not Qualified
Maximum seat height	2.65 mm	4.45 mm	4.45 mm	4.45 mm	4.45 mm	4.45 mm	2.65 mm
surface mount	YES	NO	NO	NO	NO	NO	YES
Switch configuration	BUCK	BUCK	BUCK	BUCK	BUCK	BUCK	BUCK
Maximum switching frequency	63 kHz	63 kHz	63 kHz	63 kHz	63 kHz	63 kHz	63 kHz
Terminal form	GULL WING	THROUGH-HOLE	THROUGH-HOLE	THROUGH-HOLE	THROUGH-HOLE	THROUGH-HOLE	GULL WING
Terminal pitch	1.27 mm	2.54 mm	2.54 mm	2.54 mm	2.54 mm	2.54 mm	1.27 mm
Terminal location	DUAL	DUAL	DUAL	DUAL	DUAL	DUAL	DUAL
width	7.5 mm	7.62 mm	7.62 mm	7.62 mm	7.62 mm	7.62 mm	7.5 mm
Nominal output voltage	-	1.23 V	12 V	15 V	3.3 V	5 V	-
Base Number Matches	-	1	1	1	1	1	-
Is it Rohs certified?	-	-	incompatible	incompatible	incompatible	incompatible	-
Peak Reflow Temperature (Celsius)	-	-	NOT SPECIFIED	NOT SPECIFIED	NOT SPECIFIED	NOT SPECIFIED	-
Maximum time at peak reflow temperature	-	-	NOT SPECIFIED	NOT SPECIFIED	NOT SPECIFIED	NOT SPECIFIED	-

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