SM8303 Datasheet, PDF (5/11 Pages) SamHop Microelectronics Corp. – 150KHz, 3A PWM Buck Switching Regulator

SAMHOP Microelectronics Corp.
150KHz, 3A PWM Buck Switching Regulator
SM8303
Typical Performance Characteristics
Typical Performance Characteristics
Normalized Output Voltage
Efficiency
5.10
5.05
V_IN =20V, I _LOAD=3A
Normalized at T_J=25^oC
100
95
3A Load
90
5.00
85
5V
4.95
4.90
-50 -25
0 25 50 75 100 125
JUNCTION TEMPERATURE(^oC)
80
3.3V
75
70
8
10 15 20 25 30 35 40
JUNCTION TEMPERATURE(^oC)
Switch Saturation Voltage
1.7
1 : -40 ^oC
2 : 25 ^oC
1.6
3 : 125 ^oC
1.5
1.4
1
1.3
2
3
1.2
2.0
3
4
5
SWITCH CURRENT(A)
Operating Quiescent Current
25.0
20.0
15.0
Switch ON
10.0
Switch OFF
5.0
0.0
-50 -25 0 25 50 75 100 125
JUNCTION TEMPERATURE(^oC)
Switch Current Limit
8.0
6.0
VIN =10V 20V 40V
4.0
2.0
0.0
0
1 23 4 5
Output current Io (A)
67
200.0
Shutdown Quiescent Current
130.0
100.0
1
2
80.0
3
40.0
V_ON/OFF=5V
1 : -40 ^oC
2 : 25 ^oC
3 : 125 ^oC
0.0
10
20
30
40
SUPPLY VOLOTAGE (V)
5
V1.0 May 17 ,2007