Power Management
A A
MICROELECTRONICS
GM7230
3A STEP-DOWN VOLTAGE REGULATOR
Typical Performance Characteristics
Figure 3. Switch Current Limit
= 12V
IN
Figure 2. Switch Saturation Voltage
1.4
5.5
5.0
4.5
4.0
3.5
V
V
= 12V
IN
V
= 5V
1.3
1.2
1.1
1.0
0.9
0.8
0.7
0.6
OUT
T
= - 40°C
J
25°C
125 °C
0
1
2
3
4
-50 -25
0
25 50
75 100 125
SWITCH CURRENT (A)
JUNCTION TEMPERATURE (°C)
Figure 4. Dropout Voltage
Figure 5. Operating Quiescent Current
24
1.6
1.4
1.2
1.0
0.8
0.6
L = 33 µH
= 0.04W
4.5V < V < 40V
IN
R
IND
SWITCH = 0
V
= V
-50mV
REG
20
16
12
8
OUT
Switch ON
I
= 3A
LOAD
I
= 1A
LOAD
Switch OFF
4
0
-50 -25
0
25 50
75 100 125
-50 -25
0
25 50
75 100 125
JUNCTION TEMPERATURE (°C)
JUNCTION TEMPERATURE (°C)
Figure 6. Shutdown Quiescent Current
Figure 7. Minimum Operating Supply Voltage
120
100
80
60
40
20
0
5
V
= 5V
ON / OFF
4
3
2
1
T
J
= 25°C
T
J
= -40°C AND 125°C
V
= 1.23V
OUT
I
= 120 mA
LOAD
0
-50 -25
0
25 50
75 100 125
0
10
20
30
40
SUPPLY VOLTAGE (V)
JUNCTION TEMPERATURE (°C)
8
GAMMA [ GAMMA MICROELECTRONICS INC. ]
