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

X  

LM2575 数据表(PDF) 9 Page - Motorola, Inc

部件名 LM2575
功能描述  EASY SWITCHERE??1.0 A STEP-DOWN VOLTAGE REGULATOR
Download  28 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
制造商  MOTOROLA [Motorola, Inc]
网页  http://www.freescale.com
标志 MOTOROLA - Motorola, Inc

LM2575 数据表(HTML) 9 Page - Motorola, Inc

Back Button LM2575 Datasheet HTML 5Page - Motorola, Inc LM2575 Datasheet HTML 6Page - Motorola, Inc LM2575 Datasheet HTML 7Page - Motorola, Inc LM2575 Datasheet HTML 8Page - Motorola, Inc LM2575 Datasheet HTML 9Page - Motorola, Inc LM2575 Datasheet HTML 10Page - Motorola, Inc LM2575 Datasheet HTML 11Page - Motorola, Inc LM2575 Datasheet HTML 12Page - Motorola, Inc LM2575 Datasheet HTML 13Page - Motorola, Inc Next Button
Zoom Inzoom in Zoom Outzoom out
 9 / 28 page
background image
LM2575
9
MOTOROLA ANALOG IC DEVICE DATA
Procedure (Fixed Output Voltage Version) In order to simplify the switching regulator design, a step–by–step
design procedure and example is provided.
Procedure
Example
Given Parameters:
Vout = Regulated Output Voltage (3.3 V, 5.0 V, 12 V or 15 V)
Vin(max) = Maximum DC Input Voltage
ILoad(max) = Maximum Load Current
Given Parameters:
Vout = 5.0 V
Vin(max) = 20 V
ILoad(max) = 0.8 A
1. Controller IC Selection
According to the required input voltage, output voltage and
current, select the appropriate type of the controller IC output
voltage version.
1. Controller IC Selection
According to the required input voltage, output voltage, current
polarity and current value, use the LM2575–5 controller IC
2. Input Capacitor Selection (Cin)
To prevent large voltage transients from appearing at the input
and for stable operation of the converter, an aluminium or
tantalum electrolytic bypass capacitor is needed between the
input pin +Vin and ground pin Gnd. This capacitor should be
located close to the IC using short leads. This capacitor should
have a low ESR (Equivalent Series Resistance) value.
2. Input Capacitor Selection (Cin)
A 47
µF, 25 V aluminium electrolytic capacitor located near to
the input and ground pins provides sufficient bypassing.
3. Catch Diode Selection (D1)
A. Since the diode maximum peak current exceeds the
regulator maximum load current the catch diode current
rating must be at least 1.2 times greater than the maximum
load current. For a robust design the diode should have a
current rating equal to the maximum current limit of the
LM2575 to be able to withstand a continuous output short
B. The reverse voltage rating of the diode should be at least
1.25 times the maximum input voltage.
3. Catch Diode Selection (D1)
A. For this example the current rating of the diode is 1.0 A.
B. Use a 30 V 1N5818 Schottky diode, or any of the suggested
fast recovery diodes shown in the Table 4.
4. Inductor Selection (L1)
A. According to the required working conditions, select the
correct inductor value using the selection guide from
Figures 17 to 21
.
B. From the appropriate inductor selection guide, identify the
inductance region intersected by the Maximum Input
Voltage line and the Maximum Load Current line. Each
region is identified by an inductance value and an inductor
code.
C. Select an appropriate inductor from the several different
manufacturers part numbers listed in Table 1 or Table 2.
When using Table 2 for selecting the right inductor the
designer must realize that the inductor current rating must
be higher than the maximum peak current flowing through
the inductor. This maximum peak current can be calculated
as follows
:
where ton is the “on” time of the power switch and
For additional information about the inductor, see the
inductor section in the “External Components” section of
this data sheet.
I
p(max)
+ I
Load(max) )
V
in
–Vout ton
2L
ton +
V
out
V
in
x
1
fosc
4. Inductor Selection (L1)
A. Use the inductor selection guide shown in Figures 17 to 21.
B. From the selection guide, the inductance area intersected
by the 20 V line and 0.8 A line is L330.
C. Inductor value required is 330
µH. From the Table 1 or
Table 2
, choose an inductor from any of the listed
manufacturers.


类似零件编号 - LM2575

制造商部件名数据表功能描述
logo
ON Semiconductor
LM2575 ONSEMI-LM2575 Datasheet
382Kb / 26P
   1.0 A, Adjustable Output Voltage, Step-Down Switching Regulator
May, 2004 ??Rev. 6
LM2575 ONSEMI-LM2575 Datasheet
461Kb / 28P
   1.0 A, Adjustable Output Voltage, Step-Down
June, 2009 ??Rev. 11
logo
Semtech Corporation
LM2575 SEMTECH-LM2575 Datasheet
441Kb / 19P
   1A & 3A Miniconverter Switching Regulators
logo
ON Semiconductor
LM2575 ONSEMI-LM2575 Datasheet
461Kb / 28P
   1.0 A, Adjustable Output Voltage, Step-Down Switching Regulator
June, 2009 ??Rev. 11
logo
Micrel Semiconductor
LM2575 MICREL-LM2575 Datasheet
104Kb / 9P
   52kHz Simple 1A Buck Regulator
More results

类似说明 - LM2575

制造商部件名数据表功能描述
logo
ON Semiconductor
LM2595 ONSEMI-LM2595 Datasheet
572Kb / 25P
   1.0 A, Step-Down Switching Regulator
February, 2009 ??Rev. 2
LM2575T-15G ONSEMI-LM2575T-15G Datasheet
497Kb / 28P
   1.0 A, Adjustable Output Voltage, Step-Down Switching Regulator
June, 2009 ??Rev. 11
LM2575T-005G ONSEMI-LM2575T-005G Datasheet
461Kb / 28P
   1.0 A, Adjustable Output Voltage, Step-Down Switching Regulator
June, 2009 ??Rev. 11
LM2575 ONSEMI-LM2575 Datasheet
382Kb / 26P
   1.0 A, Adjustable Output Voltage, Step-Down Switching Regulator
May, 2004 ??Rev. 6
LM2575 ONSEMI-LM2575_09 Datasheet
497Kb / 28P
   1.0 A, Adjustable Output Voltage, Step-Down Switching Regulator
June, 2009 ??Rev. 11
LM2575T-ADJ ONSEMI-LM2575T-ADJ Datasheet
497Kb / 28P
   1.0 A, Adjustable Output Voltage, Step-Down Switching Regulator
June, 2009 ??Rev. 11
logo
Motorola, Inc
LM2576 MOTOROLA-LM2576 Datasheet
287Kb / 28P
   Easy Switcher 3.0A Step-Down Voltage Regulator
logo
IK Semicon Co., Ltd
IL2575-XX IKSEMICON-IL2575-XX Datasheet
761Kb / 17P
   1.0 A, 15 V, Step-Down Switching Regulator
logo
ON Semiconductor
LM2575D2T-005 ONSEMI-LM2575D2T-005 Datasheet
461Kb / 28P
   1.0 A, Adjustable Output Voltage, Step-Down
June, 2009 ??Rev. 11
logo
Motorola, Inc
LM2576 MOTOROLA-LM2576_12 Datasheet
298Kb / 28P
   EASY SWITCHERER 3.0 A STEP?밆OWN VOLTAGE REGULATOR
More results


Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28


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