SAMHOP Microelectronics Corp.
52KHz, 3A PWM Buck Switching Regulator
Typical Performance Characteristics
Typical Performance Characteristics
Normalized Output Voltage
5.10
OUTPUT VOLTAGE CHANGE
V
IN
=20V, I
LOAD
=3A
Normalized at T
J
=25
o
C
SM8313F
Efficiency
100
EFFICIENCY (%)
5.05
95
90
85
80
75
3A Load
5.00
5V
4.95
3.3V
4.90
-50
-25
0
25
50
75
100
125
70
8
10
15
20
25
30
35
40
JUNCTION TEMPERATURE(
o
C)
JUNCTION TEMPERATURE(
o
C)
Switch Saturation Voltage
1.7
SATURATION VOLTAGE (V)
Switch Current Limit
8.0
Output voltage Vo(V)
1.6
1.5
1.4
1 : -40
2 : 25
o
C
3 : 125
o
C
o
C
6.0
V
IN
=10V 20V 40V
4.0
1
1.3
1.2
3
2.0
3
4
5
2
2.0
0.0
0
1
2
3
4
5
6
7
SWITCH CURRENT(A)
Output current Io (A)
Operating Quiescent Current
25.0
SUPPLY CURRENT (mA)
Shutdown Quiescent Current
200.0
130.0
CURRENT (uA)
20.0
15.0
10.0
5.0
0.0
-50
-25
0
25
50
75
100
125
Switch ON
Switch OFF
100.0
80.0
40.0
0.0
1
2
3
V
ON/OFF
=5V
1 : -40
o
C
2 : 25
o
C
3 : 125
o
C
20
30
40
10
JUNCTION
TEMPERATURE(
o
C)
SUPPLY VOLOTAGE (V)
5
V1.0 May 17 ,2007
SAMHOP [ SAMHOP MICROELECTRONICS CORP. ]
