LM2574-5.0BWM MICREL [Micrel Semiconductor], LM2574-5.0BWM Datasheet - Page 5

• Manufacturer Part Number: LM2574-5.0BWM
• Description: 52kHz Simple 0.5A Buck Regulator
• Manufacturer: MICREL [Micrel Semiconductor]

Typical Characteristics
December 2003
LM2574
-100
100
-25
-50
-75
1.5
0.5
5.0
4.5
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
20
18
16
14
12
10
75
50
25
8
6
4
1
0
-75
0
0
-75 -50 -25 0
-75 -50 -25 0 25 50 75 100 125 150
0
Supply Current
Current Limit
Minimum Operating
Voltage
Normalized
Output Voltage
-50 -25 0 25 50 75 100 125 150
JUNCTION TEMPERATURE (˚C)
JUNCTION TEMPERATURE (˚C)
10
JUNCTION TEMPERATURE (˚C)
I LOAD to 0.5A
INPUT VOLTAGE (V)
Normalized to T J = 25˚C
20
I LOAD = 100mA
25 50 75 100 125 150
I LOAD = 100 mA
30
V OUT = 5V
V IN = 12V
V OUT = 1.23V
Measured at
Ground Pin
V OUT = 5V
T J = 25˚C
40
VI N = 25V
50
(Circuit of Figure 1)
60
20.0
17.5
15.0
12.5
10.0
0.3
1.1
0.9
0.7
0.5
7.5
5.0
2.5
14
12
10
--6
-2
-4
-6
+8
+6
+4
+2
-2
-4
-8
0
8
6
4
2
0
0
-75
0
0
0
Supply Current
vs. Duty Cycle
Switch
Saturation Voltage
Line Regulation
Oscillator Frequency
125˚C
150˚C
-55˚C
-40˚C
Normalized to V IN = 10V
V OUT = 5V
I LOAD = 100mA
T J = 25
25˚C
-50 -25 0 25 50 75 100 125 150
JUNCTION TEMPERATURE (˚C)
0.1
5
20
DUTY CYCLE (%)
SWITCH CURRENT (A)
I LOAD = 100 mA
INPUT VOLTAGE (V)
10
V IN from 7V to 40V
40
0.2
Normalized at 25˚C
15
5
0.3
60
20
V IN = 40V
V IN = 12V
0.4
80
25
100
0.5
30
-100
100
200
150
100
100
-25
-50
-75
2.0
1.5
1.0
0.5
95
90
85
80
75
70
65
60
50
75
50
25
0
0
-75
0
-75
-75 -50 -25 0 25 50 75 100 125 150
0
Feedback Pin Current
Dropout Voltage
Standby
Quiescent Current
Efficiency
-50 -25 0 25 50 75 100 125 150
-50 -25 0 25 50 75 100 125 150
100 mA
I LOAD = 0.5A
5
I LOAD = 100 mA
JUNCTION TEMPERATURE (˚C)
JUNCTION TEMPERATURE (˚C)
JUNCTION TEMPERATURE (˚C)
0.5A
10 15 20 25 30
INPUT VOLTAGE (V)
V IN = 40V
V IN = 12V
V ON/OFF = 5V
V OUT = 12V
V OUT = 3V
100 mA
R IND = 0.2
V OUT = 5%
0.5A
35 40
M9999-122303
Micrel