SAMHOP Microelectronics Corp.
SM8303
150KHz, 3A PWM Buck Switching Regulator
ꢀTypical Performance Characteristics
Typical Performance Characteristics
Normalized Output Voltage
Efficiency
5.10
VIN =20V, I LOAD=3A
Normalized at TJ=25oC
100
3A Load
5.05
5.00
4.95
4.90
95
90
85
80
75
70
5V
3.3V
-50 -25
0
25
50 75 100 125
30
40
8
10 15
20
25
35
JUNCTION TEMPERATURE(oC)
JUNCTION TEMPERATURE(oC)
Switch Saturation Voltage
Switch Current Limit
8.0
6.0
4.0
2.0
0.0
1.7
1.6
1.5
1.4
1.3
1.2
1 : -40 oC
2 : 25 oC
3 : 125 oC
VIN
=10V 20V 40V
1
2
3
2.0
4
5
3
0
1
2
3
4
5
6
7
SWITCH CURRENT(A)
Output current Io (A)
Shutdown Quiescent Current
Operating Quiescent Current
200.0
130.0
100.0
80.0
40.0
0.0
25.0
20.0
15.0
10.0
5.0
Switch ON
1
2
VON/OFF=5V
1 : -40 oC
2 : 25 oC
3 : 125 oC
3
Switch OFF
0.0
-50 -25
0
25
50 75 100 125
10
20
30
40
JUNCTION TEMPERATURE(oC)
SUPPLY VOLOTAGE (V)
5
V1.0 May 17 ,2007
SAMHOP [ SAMHOP MICROELECTRONICS CORP. ]
