GM7230_13 Datasheet, PDF (8/11 Pages) Gamma Microelectronics Inc. – 150KHz, 3A STEP DOWN VOLTAGE SWITCHING REGULATORS

GM7230
150KHz, 3A STEP DOWN VOLTAGE
SWITCHING REGULATORS
Typical Performance Characteristics
Figure 3. Switch Saturation Voltage
1.4
V_{lN =12V}
1.3
1.2
1.1
T_J = - 40°C
1.0
Figure 4. Switch Current Limit
5.5
V_lN = 12V
V_OUT =5V
5.0
4.5
0.9
0.8 _25°
C
125 °C
0.7
0.6
0
1
2
3
4
SWlTCH CURRENT (A)
Figure 5. Dropout Voltage
1.6
L = 33μH
RIND = 0.04
1.4
VOUT = VREG = 50mV
4.0
3.5
-50 -25 0 25 5 0 75 100 125
JUNCTlON TEMPERATURE (°C)
Figure 6. Operating Quiescent Current
24
4.5V < VIN < 40V
20
ISWITCH = 0
1.2
1.0
ILOAD = 1A
0.8
ILOAD = 3A
16 Switch ON
12
8
Switch OFF
4
0.6
-50 -25 0 25 50 75 100
JUNCTION TEMPERATURE (°C)
0
-50 -25 0 25 50 75 100 125
JUNCTION TEMPERATURE (°C)
Figure 7. Shutdown Quiescent Current
150
VON/OFF = 5V
100
TJ = 25°C
80
60
TJ = -40°C and 125°C
40
Figure 8. Minimum Operating Supply Voltage
5
4
3
2
20
0
0
10
20
30
40
SUPPLY VOLTAGE (V)
1 V_OUT = 1.23V
ILOAD = 120mA
0
-50 -25 0 25 50 75 100 125
JUNCTION TEMPERATURE (°C)
Figure 9. SD Pin Current (Sinking)
8
7
VIN = 40V
TJ = -40°C and 125°C
6
5
4
3
2
Figure 10. Switching Frequency
160
155
150
145
140
135
1
130
0
0
5 10 15
20 25
120
-50 -25 0 25 50 75 100 125
8
SD PlN VOLTAGE(V)
JUNCTION TEMPERATURE (°C)