Datasheet texas instruments lm2576s-adj/nopb

Application Notes

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  • AN-1197 Selecting Inductors for Buck Converters (Rev. B)

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  • Switching Regulator Fundamentals (Rev. A)

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  • Input and Output Capacitor Selection

    PDF, 219 Кб, Файл опубликован: 19 сен 2005

  • AN-643 EMI/RFI Board Design (Rev. B)

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  • AN-1149 Layout Guidelines for Switching Power Supplies (Rev. C)

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  • Low EMI Layout Made SIMPLE With LM43600/1/2/3 and LM46000/1/2 (Rev. A)

    PDF, 512 Кб, Версия: A, Файл опубликован: 12 сен 2014Printed 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

Datasheet Download — ETC

Номер произв LM2576T-ADJ
Описание 3A Step-Down Voltage Regulator
Производители ETC
логотип 　

1Page

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LM2576
3A Step-Down Voltage Regulator
GENERAL DESCRIPTION
The LM2576 Series are step-down switching
regulators with all required active functions. It is
capable of driving 3A load with excellent line and
load regulations. These devices are available in
fixed output voltages of 3.3V, 5V, 12V and an
adjustable output version.
The LM2576 series offers a high-efficiency
replacement for popular three-terminal linear
regulators. Also it requires a minimum number of
external components. It substantially not only
reduces the area of board size but also the size of
heat sink, and in some cases no heat sink is
required. The ±4% tolerance on output voltage
within specified input voltages and output load
conditions is guaranteed. Also, the oscillator
frequency accuracy is within ±10%. External
shutdown is included. Featuring 80µA (typical)
standby current. The output switch includes
cycle-by-cycle current limiting, as well as thermal
shutdown for full protection under fault conditions.
This series are offered in 5-pin TO-263,
TO-220 package.
Block Diagram
FEATURES

Guaranteed 3A output current.

3.3V, 5V, 12Vand adjustable versions,

Wide input voltage range, up to 45V

Internal oscillator of 52KHz fixed frequency.

Wide adjust version output voltage range,

from 1.23V to 37V ±4% max. at over line and
load conditions.

Low standby current, typ. 80µA, at shutdown

mode

Requires only 4 external components

Thermal shutdown and current limit

protection

P+ product enhancement tested

APPLICATIONS

LCD Monitors.

ADD-ON Cards Switching Regulators

High Efficiency Step-Down Regulators

Efficient Pre-regulator for Linear Regulators

Positive to Negative converter (Buck-Boost)

DC Input
+
Vin
1
Internal
Regulator
Enable
Enable
5
4
Feed
Back
R2

+-

R1
1K
1.23V
Band-Gap
Reference
Fixed Gain
3Amp.

Error amp. Comparator Driver Switch

+-

Thermal
Shutdown
52KHz
Oscillator
Reset
Current
Limited
Output
2
3
L1
+
Cout
D1
Ver1.0
1

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Ordering Information
LM2576
Part No.
LM2576T-XX
LM2576T-ADJ
LM2576S-ADJ
LM2576S-XX
Operating Temp.
(Ambient)

-20 ~ +85℃

Package
TO-220-5L
TO-263-5L

Note: Where XX denotes voltage option, Available are 12V, 5V and 3.3V. Leave blank for

adjustable version. Contact factory for additional voltage options.
Pin assignment
TO-220
TO-263
1. Input
2. Output
3. Ground
4. Feedback
5. Enable
Absolute Maximum Ratings
Input voltage
Vin
ENABLE Pin Input Voltage
Vin (operate)
Power Dissipation

PD

Operating Junction Temperature Range

TJ

Storage Temperature Range

TSTG

+45

-0.3V ≤ V ≤ Vin

Internal Limited
-40 ~ +150
-65 ~ +150

Lead Soldering Temperature (260℃)

TO-220-5L / TO-263-5L
Package
10
V
V
W
℃
℃
S
Ver1.0
2

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Electrical Characteristics

Vin = 12V, IL= 500mA, Ta = 25oC unless otherwise specified.

Parameter
Conditions
LM2576-3.3V

Output Voltage (Note 1) Vin=12V, IL=0.5A (Figure 1)

0.5A ≤IL ≤3A, 6V ≤Vin ≤45V

Output Voltage (Note 1)
(Figure 1)
Efficiency

Vin=12V, IL=3A

LM2576-5V

Output Voltage (Note 1) Vin=12V, IL=0.5A(Figure 1)

0.5A ≤IL ≤3A, 8V ≤Vin ≤45V

Output Voltage (Note 1)
(Figure 1)
Efficiency

Vin=12V, IL=3A

LM2576-12V

Output Voltage (Note 1) Vin=25V, IL=0.5A (Figure 1)

0.5A ≤IL ≤3A, 15V ≤Vin ≤45V

Output Voltage(Note 1)
(Figure 1)
Efficiency

Vin=15V, IL=3A

LM2576
Feedback Voltage
(Note 1)
Feedback Voltage
(Note 1)
Efficiency

Vin=12V, Vout=5V,IL=0.5A

(Figure 2)

0.5A ≤IL ≤3A, 8V ≤Vin ≤45V,

Vout=5V (Figure 2)

Vin=12V, Vout=5V, IL=3A

Min
0.98|Vo|
0.96|Vo|
—
0.98|Vo|
0.96|Vo|
—
0.98|Vo|
0.96|Vo|
—
0.98|Vo|
0.96|Vo|
—
Typ
3.3
75
5.0
77
12
88
1.23
77
LM2576
Max Unit
1.02|Vo|
1.04|Vo|
V
— %
1.02|Vo|
1.04|Vo|
V
— %
1.02|Vo|
1.04|Vo|
V
— %
1.02|Vo|
1.04|Vo|
V
— %
Ver1.0
3
Всего страниц 8 Pages
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Экологический статус

LM2576S-12 LM2576S-12/NOPB LM2576S-3.3/NOPB LM2576S-5.0 LM2576S-5.0/NOPB LM2576S-ADJ/NOPB LM2576SX-3.3/NOPB LM2576SX-5.0/NOPB LM2576SX-ADJ/NOPB LM2576T-12 LM2576T-12/LB03 LM2576T-12/LF03 LM2576T-12/NOPB LM2576T-15/LF03 LM2576T-15/NOPB LM2576T-3.3/LB03 LM2576T-3.3/LF03 LM2576T-3.3/NOPB LM2576T-5.0 LM2576T-5.0/LB03 LM2576T-5.0/LF02 LM2576T-5.0/LF03 LM2576T-5.0/NOPB LM2576T-ADJ LM2576T-ADJ/LB03 LM2576T-ADJ/LF02 LM2576T-ADJ/LF03 LM2576T-ADJ/NOPB
RoHS See ti.com Совместим Совместим See ti.com Совместим Совместим Совместим Совместим Совместим See ti.com See ti.com Совместим Совместим Совместим Совместим Не совместим Совместим Совместим See ti.com See ti.com Совместим Совместим Совместим See ti.com See ti.com Совместим Совместим Совместим
Бессвинцовая технология (Pb Free) Да Да Да Да Да Да Нет Да

Параметры

Parameters / Models LM2576S-12 LM2576S-12/NOPB LM2576S-3.3/NOPB LM2576S-5.0 LM2576S-5.0/NOPB LM2576S-ADJ/NOPB LM2576SX-3.3/NOPB LM2576SX-5.0/NOPB LM2576SX-ADJ/NOPB LM2576T-12 LM2576T-12/LB03 LM2576T-12/LF03 LM2576T-12/NOPB LM2576T-15/LF03 LM2576T-15/NOPB LM2576T-3.3/LB03 LM2576T-3.3/LF03 LM2576T-3.3/NOPB LM2576T-5.0 LM2576T-5.0/LB03 LM2576T-5.0/LF02 LM2576T-5.0/LF03 LM2576T-5.0/NOPB LM2576T-ADJ LM2576T-ADJ/LB03 LM2576T-ADJ/LF02 LM2576T-ADJ/LF03 LM2576T-ADJ/NOPB
Approx. Price (US$) 1.19 | 1ku
Control Mode Voltage Mode Voltage Mode Voltage Mode Voltage Mode Voltage Mode Voltage Mode Voltage Mode Voltage Mode Voltage Mode Voltage Mode Voltage Mode Voltage Mode Voltage Mode Voltage Mode Voltage Mode Voltage Mode Voltage Mode Voltage Mode Voltage Mode Voltage Mode Voltage Mode Voltage Mode Voltage Mode Voltage Mode Voltage Mode Voltage Mode Voltage Mode Voltage Mode
Duty Cycle(Max), % 98 98 98 98 98 98 98 98 98 98 98 98 98 98 98 98 98 98 98 98 98 98 98 98 98 98 98
Duty Cycle(Max)(%) 98
Основные особенности Enable Enable Enable Enable Enable Enable Enable Enable Enable Enable Enable Enable Enable Enable Enable Enable Enable Enable Enable Enable Enable Enable Enable Enable Enable Enable Enable
Iout(Max), A 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
Iout(Max)(A) 3
Iq(Typ), мА 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5
Iq(Typ)(mA) 5
Рабочий диапазон температур, C от -40 до 125 от -40 до 125 от -40 до 125 от -40 до 125 от -40 до 125 от -40 до 125 от -40 до 125 от -40 до 125 от -40 до 125 от -40 до 125 от -40 до 125 от -40 до 125 от -40 до 125 от -40 до 125 от -40 до 125 от -40 до 125 от -40 до 125 от -40 до 125 от -40 до 125 от -40 до 125 от -40 до 125 от -40 до 125 от -40 до 125 от -40 до 125 от -40 до 125 от -40 до 125 от -40 до 125
Operating Temperature Range(C) -40 to 125
Package Group DDPAK/TO-263 DDPAK/TO-263 DDPAK/TO-263 DDPAK/TO-263 DDPAK/TO-263 DDPAK/TO-263 DDPAK/TO-263 DDPAK/TO-263 DDPAK/TO-263 TO-220 TO-220 TO-220 TO-220 TO-220 TO-220 TO-220 TO-220 TO-220 TO-220 TO-220 TO-220 TO-220 TO-220 TO-220 TO-220 TO-220 TO-220 TO-220
Rating Catalog Catalog Catalog Catalog Catalog Catalog Catalog Catalog Catalog Catalog Catalog Catalog Catalog Catalog Catalog Catalog Catalog Catalog Catalog Catalog Catalog Catalog Catalog Catalog Catalog Catalog Catalog Catalog
Regulated Outputs 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
Regulated Outputs(#) 1
Special Features Enable
Switching Frequency(Max), kHz 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63
Switching Frequency(Max)(kHz) 63
Switching Frequency(Min), kHz 42 42 42 42 42 42 42 42 42 42 42 42 42 42 42 42 42 42 42 42 42 42 42 42 42 42 42
Switching Frequency(Min)(kHz) 42
Тип Converter Converter Converter Converter Converter Converter Converter Converter Converter Converter Converter Converter Converter Converter Converter Converter Converter Converter Converter Converter Converter Converter Converter Converter Converter Converter Converter Converter
Vin(Max), В 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40
Vin(Max)(V) 40
Vin(Min), В 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4
Vin(Min)(V) 4
Vout(Max), В 37 37 37 37 37 37 37 37 37 37 37 37 37 37 37 37 37 37 37 37 37 37 37 37 37 37 37
Vout(Max)(V) 37
Vout(Min), В 3.3 3.3 3.3 3.3 3.3 3.3 3.3 3.3 3.3 3.3 3.3 3.3 3.3 3.3 3.3 3.3 3.3 3.3 3.3 3.3 3.3 3.3 3.3 3.3 3.3 3.3 3.3
Vout(Min)(V) 3.3

Корпус / Упаковка / Маркировка

LM2576S-12 LM2576S-12/NOPB LM2576S-3.3/NOPB LM2576S-5.0 LM2576S-5.0/NOPB LM2576S-ADJ/NOPB LM2576SX-3.3/NOPB LM2576SX-5.0/NOPB LM2576SX-ADJ/NOPB LM2576T-12 LM2576T-12/LB03 LM2576T-12/LF03 LM2576T-12/NOPB LM2576T-15/LF03 LM2576T-15/NOPB LM2576T-3.3/LB03 LM2576T-3.3/LF03 LM2576T-3.3/NOPB LM2576T-5.0 LM2576T-5.0/LB03 LM2576T-5.0/LF02 LM2576T-5.0/LF03 LM2576T-5.0/NOPB LM2576T-ADJ LM2576T-ADJ/LB03 LM2576T-ADJ/LF02 LM2576T-ADJ/LF03 LM2576T-ADJ/NOPB
Pin 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5
Package Type KTT KTT KTT KTT KTT KTT KTT KTT KTT KC NDH NDH KC NDH KC NDH NDH KC KC NDH NEB NDH KC KC NDH NEB NDH KC
Industry STD Term TO-263 TO-263 TO-263 TO-263 TO-263 TO-263 TO-263 TO-263 TO-263 TO-220 TO-220 TO-220 TO-220 TO-220 TO-220 TO-220 TO-220 TO-220 TO-220 TO-220 TO-220 TO-220 TO-220 TO-220 TO-220 TO-220
JEDEC Code R-PSFM-G R-PSFM-G R-PSFM-G R-PSFM-G R-PSFM-G R-PSFM-G R-PSFM-G R-PSFM-G R-PSFM-G R-PSFM-T R-MSFM-L R-MSFM-L R-PSFM-T R-MSFM-L R-PSFM-T R-MSFM-L R-MSFM-L R-PSFM-T R-PSFM-T R-MSFM-L R-MSFM-L R-PSFM-T R-PSFM-T R-MSFM-L R-MSFM-L R-PSFM-T
Package QTY 45 45 45 45 45 45 500 500 500 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45 45
Carrier TUBE TUBE TUBE TUBE TUBE TUBE LARGE T&R LARGE T&R LARGE T&R TUBE TUBE TUBE TUBE TUBE TUBE TUBE TUBE TUBE TUBE TUBE TUBE TUBE TUBE TUBE TUBE TUBE TUBE
Width (мм) 8.42 8.42 8.42 8.42 8.42 8.42 8.42 8.42 8.42 8.51 10.16 10.16 8.51 10.16 8.51 10.16 10.16 8.51 8.51 10.16 10.16 8.51 8.51 10.16 10.16 8.51
Length (мм) 10.16 10.16 10.16 10.16 10.16 10.16 10.16 10.16 10.16 10.16 14.986 14.986 10.16 14.986 10.16 14.986 14.986 10.16 10.16 14.986 14.986 10.16 10.16 14.986 14.986 10.16
Thickness (мм) 4.58 4.58 4.58 4.58 4.58 4.58 4.58 4.58 4.58 4.58 4.572 4.572 4.58 4.572 4.58 4.572 4.572 4.58 4.58 4.572 4.572 4.58 4.58 4.572 4.572 4.58
Pitch (мм) 1.7 1.7 1.7 1.7 1.7 1.7 1.7 1.7 1.7 1.7 1.702 1.702 1.7 1.702 1.7 1.702 1.702 1.7 1.7 1.702 1.702 1.7 1.7 1.702 1.702 1.7
Max Height (мм) 4.83 4.83 4.83 4.83 4.83 4.83 4.83 4.83 4.83 4.7 4.7 4.7 4.7 4.7 4.7 4.7 4.7 4.7 4.7 4.7 4.7 4.7 4.7 4.7 4.7 4.7
Mechanical Data
Маркировка -3.3 P+

Datasheets

ProductFolder Sample &Buy TechnicalDocuments Support &Community Tools &Software LM2576, LM2576HVSNVS107D – JUNE 1999 – REVISED MAY 2016 LM2576xx Series SIMPLE SWITCHERВ 3-A Step-Down Voltage Regulator1 Features 3 Description The LM2576 series of regulators are monolithicintegrated circuits that provide all the active functionsfor a step-down (buck) switching regulator, capable ofdriving 3-A load with excellent line and loadregulation. These devices are available in fixed outputvoltages of 3.3 V, 5 V, 12 V, 15 V, and an adjustableoutput version. 1 3.3-V, 5-V, 12-V, 15-V, and Adjustable OutputVersionsAdjustable Version Output Voltage Range,1.23 Vto 37 V (57 V for HV Version) В±4% Maximum OverLine and Load ConditionsSpecified 3-A Output CurrentWide Input Voltage Range: 40 V Up to 60 V forHV VersionRequires Only 4 External Components52-kHz Fixed-Frequency Internal Oscillator …

Статус

LM2576S-12 LM2576S-12/NOPB LM2576S-3.3/NOPB LM2576S-5.0 LM2576S-5.0/NOPB LM2576S-ADJ/NOPB LM2576SX-3.3/NOPB LM2576SX-5.0/NOPB LM2576SX-ADJ/NOPB LM2576T-12 LM2576T-12/LB03 LM2576T-12/LF03 LM2576T-12/NOPB LM2576T-15/LF03 LM2576T-15/NOPB LM2576T-3.3/LB03 LM2576T-3.3/LF03 LM2576T-3.3/NOPB LM2576T-5.0 LM2576T-5.0/LB03 LM2576T-5.0/LF02 LM2576T-5.0/LF03 LM2576T-5.0/NOPB LM2576T-ADJ LM2576T-ADJ/LB03 LM2576T-ADJ/LF02 LM2576T-ADJ/LF03 LM2576T-ADJ/NOPB
Статус продукта Не рекомендуется для новых разработок В производстве В производстве Не рекомендуется для новых разработок В производстве В производстве В производстве В производстве В производстве Не рекомендуется для новых разработок Не рекомендуется для новых разработок В производстве В производстве В производстве В производстве Не рекомендуется для новых разработок В производстве В производстве Не рекомендуется для новых разработок Не рекомендуется для новых разработок В производстве В производстве В производстве Не рекомендуется для новых разработок Не рекомендуется для новых разработок В производстве В производстве В производстве
Доступность образцов у производителя Да Нет Да Нет Да Нет Нет Нет Нет Нет Да Нет Нет Да Да Да Да Да Нет Нет Да Нет Нет Нет Нет Нет Да Да

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