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LM2574N-12

Description
1.8 A SWITCHING REGULATOR, 63 kHz SWITCHING FREQ-MAX, PDIP8
CategoryPower/power management    The power supply circuit   
File Size294KB,26 Pages
ManufacturerON Semiconductor
Websitehttp://www.onsemi.cn
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LM2574N-12 Overview

1.8 A SWITCHING REGULATOR, 63 kHz SWITCHING FREQ-MAX, PDIP8

LM2574N-12 Parametric

Parameter NameAttribute value
Is it lead-free?Contains lead
Is it Rohs certified?incompatible
Parts packaging codeDIP
package instructionDIP, DIP8,.3
Contacts8
Reach Compliance Code_compli
ECCN codeEAR99
Analog Integrated Circuits - Other TypesSWITCHING REGULATOR
control modeVOLTAGE-MODE
Maximum input voltage40 V
Minimum input voltage15 V
Nominal input voltage25 V
JESD-30 codeR-PDIP-T8
JESD-609 codee0
length9.78 mm
Number of functions1
Number of terminals8
Maximum operating temperature125 °C
Minimum operating temperature-40 °C
Maximum output current1.8 A
Package body materialPLASTIC/EPOXY
encapsulated codeDIP
Encapsulate equivalent codeDIP8,.3
Package shapeRECTANGULAR
Package formIN-LINE
Peak Reflow Temperature (Celsius)NOT SPECIFIED
Certification statusNot Qualified
Maximum seat height4.45 mm
surface mountNO
Switch configurationBUCK
Maximum switching frequency63 kHz
technologyBIPOLAR
Temperature levelAUTOMOTIVE
Terminal surfaceTin/Lead (Sn/Pb)
Terminal formTHROUGH-HOLE
Terminal pitch2.54 mm
Terminal locationDUAL
Maximum time at peak reflow temperatureNOT SPECIFIED
width7.62 mm
Base Number Matches1
LM2574, NCV2574
0.5 A, Adjustable Output
Voltage, Step−Down
Switching 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
mA
(typical) standby current. The
output switch includes cycle−by−cycle current limiting, as well as
thermal shutdown for full protection under fault conditions.
Features
http://onsemi.com
16
1
SO−16 WB
DW SUFFIX
CASE 751G
8
1
PDIP−8
N SUFFIX
CASE 626
PIN CONNECTIONS
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
NCV Prefix for Automotive and Other Applications Requiring Site
and Control Changes
Pb−Free Packages are Available*
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
*
*
FB
Sig Gnd
ON/OFF
Pwr Gnd
*
*
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
*
*
Output
*
V
in
*
*
*
(Top View)
FB
Sig Gnd
ON/OFF
Pwr Gnd
1
2
3
4
8
7
6
5
*
Output
*
V
in
(Top View)
* No internal connection, but should be soldered to
*
PC board for best heat transfer.
Applications
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 24 of this data sheet.
DEVICE MARKING INFORMATION
See general marking information in the device marking
section on page 24 of this data sheet.
*For additional information on our Pb−Free strategy and soldering details, please download the ON Semiconductor Soldering and Mounting
Techniques Reference Manual, SOLDERRM/D.
©
Semiconductor Components Industries, LLC, 2006
1
August, 2006 − Rev. 8
Publication Order Number:
LM2574/D

LM2574N-12 Related Products

LM2574N-12 LM2574N-5 LM2574N-3.3 LM2574N LM2574 LM2574N-15 LM2574DW
Description 1.8 A SWITCHING REGULATOR, 63 kHz SWITCHING FREQ-MAX, PDIP8 1.8 A SWITCHING REGULATOR, 63 kHz SWITCHING FREQ-MAX, PDIP8 1.8 A SWITCHING REGULATOR, 63 kHz SWITCHING FREQ-MAX, PDIP8 1.8 A SWITCHING REGULATOR, 63 kHz SWITCHING FREQ-MAX, PDIP8 1.8 A SWITCHING REGULATOR, 63 kHz SWITCHING FREQ-MAX, PDIP8 1.8 A SWITCHING REGULATOR, 63 kHz SWITCHING FREQ-MAX, PDIP8 1.8 A SWITCHING REGULATOR, 63 kHz SWITCHING FREQ-MAX, PDIP8
control mode VOLTAGE-MODE VOLTAGE-MODE VOLTAGE-MODE Voltage Voltage VOLTAGE-MODE Voltage
Number of functions 1 1 1 1 1 1 1
Number of terminals 8 8 8 8 8 8 8
Maximum operating temperature 125 °C 125 °C 125 °C 125 Cel 125 Cel 125 °C 125 Cel
Minimum operating temperature -40 °C -40 °C -40 °C -40 Cel -40 Cel -40 °C -40 Cel
Maximum output current 1.8 A 1.8 A 1.8 A 1.8 A 1.8 A 1.8 A 1.8 A
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
Temperature level AUTOMOTIVE AUTOMOTIVE AUTOMOTIVE AUTOMOTIVE AUTOMOTIVE AUTOMOTIVE AUTOMOTIVE
Terminal form THROUGH-HOLE THROUGH-HOLE THROUGH-HOLE THROUGH-hole THROUGH-hole THROUGH-HOLE THROUGH-hole
Terminal location DUAL DUAL DUAL pair pair DUAL pair
Is it Rohs certified? incompatible incompatible incompatible - - incompatible -
Parts packaging code DIP DIP DIP - - DIP -
package instruction DIP, DIP8,.3 DIP, DIP8,.3 DIP, DIP8,.3 - - DIP, DIP8,.3 -
Contacts 8 8 8 - - 8 -
Reach Compliance Code _compli _compli _compli - - _compli -
ECCN code EAR99 EAR99 EAR99 - - EAR99 -
Analog Integrated Circuits - Other Types SWITCHING REGULATOR SWITCHING REGULATOR SWITCHING REGULATOR - - SWITCHING REGULATOR -
Maximum input voltage 40 V 40 V 40 V - - 40 V -
Minimum input voltage 15 V 7 V 4.75 V - - 18 V -
Nominal input voltage 25 V 12 V 12 V - - 30 V -
JESD-30 code R-PDIP-T8 R-PDIP-T8 R-PDIP-T8 - - R-PDIP-T8 -
JESD-609 code e0 e0 e0 - - e0 -
length 9.78 mm 9.78 mm 9.78 mm - - 9.78 mm -
Package body material PLASTIC/EPOXY PLASTIC/EPOXY PLASTIC/EPOXY - - PLASTIC/EPOXY -
encapsulated code DIP DIP DIP - - DIP -
Encapsulate equivalent code DIP8,.3 DIP8,.3 DIP8,.3 - - DIP8,.3 -
Package shape RECTANGULAR RECTANGULAR RECTANGULAR - - RECTANGULAR -
Package form IN-LINE IN-LINE IN-LINE - - IN-LINE -
Peak Reflow Temperature (Celsius) NOT SPECIFIED NOT SPECIFIED NOT SPECIFIED - - NOT SPECIFIED -
Certification status Not Qualified Not Qualified Not Qualified - - Not Qualified -
Maximum seat height 4.45 mm 4.45 mm 4.45 mm - - 4.45 mm -
surface mount NO NO NO - - NO -
technology BIPOLAR BIPOLAR BIPOLAR - - BIPOLAR -
Terminal surface Tin/Lead (Sn/Pb) Tin/Lead (Sn/Pb) Tin/Lead (Sn/Pb) - - Tin/Lead (Sn/Pb) -
Terminal pitch 2.54 mm 2.54 mm 2.54 mm - - 2.54 mm -
Maximum time at peak reflow temperature NOT SPECIFIED NOT SPECIFIED NOT SPECIFIED - - NOT SPECIFIED -
width 7.62 mm 7.62 mm 7.62 mm - - 7.62 mm -
Base Number Matches 1 1 1 - - 1 -

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