Electronic Components Datasheet Search
  English  ▼

X  

Preview PDF HTML

LM2574 Datasheet(PDF) 5 Page - Micrel Semiconductor

Part # LM2574
Description  52KHZ SIMPLE 0.5A BUCK REGULATOR
PDF  8 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Manufacturer  MICREL [Micrel Semiconductor]
Direct Link  http://www.micrel.com
Logo MICREL - Micrel Semiconductor

LM2574 Datasheet(HTML) 5 Page - Micrel Semiconductor

  LM2574 Datasheet HTML 1Page - Micrel Semiconductor LM2574 Datasheet HTML 2Page - Micrel Semiconductor LM2574 Datasheet HTML 3Page - Micrel Semiconductor LM2574 Datasheet HTML 4Page - Micrel Semiconductor LM2574 Datasheet HTML 5Page - Micrel Semiconductor LM2574 Datasheet HTML 6Page - Micrel Semiconductor LM2574 Datasheet HTML 7Page - Micrel Semiconductor LM2574 Datasheet HTML 8Page - Micrel Semiconductor  
Zoom Inzoom in Zoom Outzoom out
 5 / 8 page
background image
December 2003
5
M9999-122303
LM2574
Micrel
Typical Characteristics (Circuit of Figure 1)
Supply Current
INPUT VOLTAGE (V)
20
Measured at
Ground Pin
TJ = 25˚C
VOUT = 5V
18
16
14
12
10
8
6
4
0
10
203040
5060
ILOAD to 0.5A
Supply Current
vs. Duty Cycle
DUTY CYCLE (%)
20.0
17.5
15.0
12.5
10.0
7.5
5.0
2.5
0
0
2040
6080
100
VIN from 7V to 40V
ILOAD = 100 mA
JUNCTION TEMPERATURE (˚C)
200
150
100
50
0
-75
VIN = 12V
Standby
Quiescent Current
VIN = 40V
-50 -25
0 25 50 75 100 125 150
Current Limit
JUNCTION TEMPERATURE (˚C)
1.5
1
0.5
0
-75
VIN = 25V
INPUT VOLTAGE (V)
100
Efficiency
VOUT = 12V
-50 -25
0 25 50 75 100 125 150
95
90
85
80
75
70
65
60
100 mA
100 mA
VOUT = 3V
0.5A
0.5A
0
5
10 15 20 25 30
35 40
Minimum Operating
Voltage
JUNCTION TEMPERATURE (˚C)
5.0
ILOAD = 100 mA
Line Regulation
INPUT VOLTAGE (V)
14
0
JUNCTION TEMPERATURE (˚C)
100
-100
-75
Feedback Pin Current
-50 -25 0
25 50 75 100 125 150
VOUT = 1.23V
4.5
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0
-75 -50 -25 0
25 50 75 100 125 150
12
10
8
6
4
2
0
-2
-4
-6
5
10
15202530
75
50
25
0
-25
-50
-75
JUNCTION TEMPERATURE (˚C)
+8
-8
-75
Oscillator Frequency
-50 -25
0 25 50 75 100 125 150
+6
+4
+2
0
-2
-4
--6
VIN = 12V
VIN = 40V
Normalized at 25˚C
Normalized to VIN = 10V
VOUT = 5V
ILOAD = 100mA
TJ = 25
VON/OFF = 5V
Switch
Saturation Voltage
SWITCH CURRENT (A)
1.1
-55˚C
0.9
0.7
0.5
0.3
0
0.1
0.2
0.3
0.4
0.5
25˚C
125˚C
150˚C
-40˚C
Dropout Voltage
JUNCTION TEMPERATURE (˚C)
2.0
-75 -50 -25
0 25 50 75 100 125 150
∆VOUT = 5%
RIND = 0.2Ω
ILOAD = 0.5A
ILOAD = 100 mA
1.5
1.0
0.5
0
Normalized
Output Voltage
JUNCTION TEMPERATURE (˚C)
100
75
50
25
0
-25
-50
-75
-100
-75 -50 -25
0
25 50 75 100 125 150
VIN = 12V
ILOAD = 100mA
Normalized to TJ = 25˚C
VOUT = 5V



Html Pages

1 2 3 4 5 6 7 8


Datasheet Download

Go To PDF Page


Link URL



Does ALLDATASHEET help your business so far?  [ DONATE ] 

About Alldatasheet   |   Advertisement   |   Contact us   |   Privacy Policy   |   Link to Datasheet    |   Link Exchange   |   Manufacturer List
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