数据搜索系统,热门电子元器件搜索
  Chinese  ▼
ALLDATASHEETCN.COM

X  

LM2576-5.0BU 数据表(PDF) 1 Page - Micrel Semiconductor

部件名 LM2576-5.0BU
功能描述  52kHz Simple 3A Buck Regulator
Download  9 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
制造商  MICREL [Micrel Semiconductor]
网页  http://www.micrel.com
标志 MICREL - Micrel Semiconductor

LM2576-5.0BU 数据表(HTML) 1 Page - Micrel Semiconductor

  LM2576-5.0BU Datasheet HTML 1Page - Micrel Semiconductor LM2576-5.0BU Datasheet HTML 2Page - Micrel Semiconductor LM2576-5.0BU Datasheet HTML 3Page - Micrel Semiconductor LM2576-5.0BU Datasheet HTML 4Page - Micrel Semiconductor LM2576-5.0BU Datasheet HTML 5Page - Micrel Semiconductor LM2576-5.0BU Datasheet HTML 6Page - Micrel Semiconductor LM2576-5.0BU Datasheet HTML 7Page - Micrel Semiconductor LM2576-5.0BU Datasheet HTML 8Page - Micrel Semiconductor LM2576-5.0BU Datasheet HTML 9Page - Micrel Semiconductor  
Zoom Inzoom in Zoom Outzoom out
 1 / 9 page
background image
August 2005
1
M9999-082605-B
LM2576
Micrel, Inc.
LM2576
52kHz Simple 3A Buck Regulator
General Description
The LM2576 series of monolithic integrated circuits provide
all the active functions for a step-down (buck) switching
regulator. Fixed versions are available with a 3.3V, 5V, or 12V
fixed output. Adjustable versions have an output voltage
range from 1.23V to 37V. Both versions are capable of driving
a 3A load with excellent line and load regulation.
These regulators are simple to use because they require a
minimum number of external components and include internal
frequency compensation and a fixed-frequency oscillator.
The LM2576 series offers a high efficiency replacement for
popular three-terminal adjustable linear regulators. It
substantially reduces the size of the heat sink, and in many
cases no heat sink is required.
A standard series of inductors available from several different
manufacturers are ideal for use with the LM2576 series. This
feature greatly simplifies the design of switch-mode power
supplies.
The feedback voltage is guaranteed to
±2% tolerance for
adjustable versions, and the output voltage is guaranteed to
±3% for fixed versions, within specified input voltages and
output load conditions. The oscillator frequency is guaranteed
to
±10%. External shutdown is included, featuring less than
200
µA standby current. The output switch includes cycle-by-
cycle current limiting and thermal shutdown for full protection
under fault conditions.
Typical Applications
Features
• 3.3V, 5V, 12V, and adjustable output versions
• Voltage over specified line and load conditions:
Fixed version:
±3% max. output voltage
Adjustable version:
±2% max. feedback voltage
• Guaranteed 3A output current
• Wide input voltage range:
4V to 40V
• Wide output voltage range
1.23V to 37V
• Requires only 4 external components
• 52kHz fixed frequency internal oscillator
• Low power standby mode I
Q typically < 200µA
• 80% efficiency (adjustable version typically > 80%)
• Uses readily available standard inductors
• Thermal shutdown and current limit protection
• 100% electrical thermal limit burn-in
Applications
• Simple high-efficiency step-down (buck) regulator
• Efficient pre-regulator for linear regulators
• On-card switching regulators
• Positive to negative converter (inverting Buck-Boost)
• Isolated Flyback Converter using minimum number of
external components
• Negative Boost Converter
R2
R1
7V–40V
Unregulated
DC Input
LM2575
+
CIN
100µF
+VIN
1
3
Gnd
5
On/Off
2
Output
4
Feedback
L1
330µH
+
D1
1N5822
COUT
330µF
R2 3.09k
R1 1k
VOUT = 1.23 1 +
(
)
+5V, 1A
Regulated
Output
Note: Pin numbers are for TO-220 Package
7V–40V
Unregulated
DC Input
LM2575-5.0
+
CIN
100µF
+VIN
1
3
Gnd
5
On/Off
2
Output
4
Feedback
L1
330µH
+
D1
1N5822
COUT
330µF
+5V, 1A
Regulated
Output
Note: Pin numbers are for TO-220 Package
Fixed Regulator in Typical Application
Adjustable Regulator in Fixed Output Application
Micrel, Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com


类似零件编号 - LM2576-5.0BU

制造商部件名数据表功能描述
logo
Micrel Semiconductor
LM2576-5.0BU MICREL-LM2576-5.0BU Datasheet
89Kb / 8P
   52kHz Simple 3A Buck Voltage Regulator
LM2576-5.0BU MICREL-LM2576-5.0BU Datasheet
58Kb / 9P
   52kHz Simple 3A Buck Regulator
LM2576-5.0BU MICREL-LM2576-5.0BU Datasheet
64Kb / 9P
   52kHz Simple 3A Buck Regulator
More results

类似说明 - LM2576-5.0BU

制造商部件名数据表功能描述
logo
Micrel Semiconductor
LM2576-5.0WU MICREL-LM2576-5.0WU Datasheet
64Kb / 9P
   52kHz Simple 3A Buck Regulator
LM2576-5.0WT MICREL-LM2576-5.0WT Datasheet
58Kb / 9P
   52kHz Simple 3A Buck Regulator
LM2576 MICREL-LM2576 Datasheet
89Kb / 8P
   52kHz Simple 3A Buck Voltage Regulator
LM2574 MICREL-LM2574 Datasheet
67Kb / 5P
   52kHz Simple 0.5A Buck Regulator
LM2574 MICREL-LM2574_05 Datasheet
192Kb / 8P
   52kHz Simple 0.5A Buck Regulator
logo
Taiwan Semiconductor Co...
TS2576 TSC-TS2576_08 Datasheet
398Kb / 8P
   3A / 52KHz Buck Switching Regulator
logo
Micrel Semiconductor
LM2574 MICREL-LM2574 Datasheet
41Kb / 8P
   52KHZ SIMPLE 0.5A BUCK REGULATOR
logo
Taiwan Semiconductor Co...
TS2576 TSC-TS2576_07 Datasheet
395Kb / 8P
   3A / 52KHz Buck Switching Regulator
logo
Micrel Semiconductor
LM2575-3.3BU MICREL-LM2575-3.3BU Datasheet
158Kb / 12P
   52kHz Simple 1A Buck Regulator
LM2575 MICREL-LM2575_09 Datasheet
158Kb / 12P
   52kHz Simple 1A Buck Regulator
More results


Html Pages

1 2 3 4 5 6 7 8 9


数据表 下载

Go To PDF Page


链接网址




隐私政策
ALLDATASHEETCN.COM
ALLDATASHEET是否为您带来帮助?  [ DONATE ] 

关于 Alldatasheet   |   广告服务   |   联系我们   |   隐私政策   |   链接交换   |   制造商名单
All Rights Reserved©Alldatasheet.com


Mirror Sites
English : Alldatasheet.com  |   English : Alldatasheet.net  |   Chinese : Alldatasheetcn.com  |   German : Alldatasheetde.com  |   Japanese : Alldatasheet.jp
Russian : Alldatasheetru.com  |   Korean : Alldatasheet.co.kr  |   Spanish : Alldatasheet.es  |   French : Alldatasheet.fr  |   Italian : Alldatasheetit.com
Portuguese : Alldatasheetpt.com  |   Polish : Alldatasheet.pl  |   Vietnamese : Alldatasheet.vn
Indian : Alldatasheet.in  |   Mexican : Alldatasheet.com.mx  |   British : Alldatasheet.co.uk  |   New Zealand : Alldatasheet.co.nz
Family Site : ic2ic.com  |   icmetro.com