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GM7109-3.3S8T Datasheet(PDF) 7 Page - Gamma Microelectronics Inc.

Part # GM7109-3.3S8T
Description  150KHz, 2A STEP DOWN VOLTAGE SWITCHING REGULATORS
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Manufacturer  GAMMA [Gamma Microelectronics Inc.]
Direct Link  http://www.gammamicro.com.tw/
Logo GAMMA - Gamma Microelectronics Inc.

GM7109-3.3S8T Datasheet(HTML) 7 Page - Gamma Microelectronics Inc.

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7
GM7109
150KHz, 2A STEP DOWN VOLTAGE
SWITCHING REGULATORS
Figure 3. Switch Saturation Voltage
1.4
V
lN
=12V
1.3
1.2
1.1
T
J = - 40°C
1.0
0.9
0.8
125 °C
0.7
0.6
1
2
0
3
4
SWlTCH CURRENT (A)
25°
C
Figure 4. Switch Current Limit
5.5
V
OUT =5V
5.0
4.5
4.0
3.5
-50
-25
0
25
50
75
100 125
JUNCTlON TEMPERATURE (°C)
V
lN = 12V
Figure 5. Dropout Voltage
1.6
1.4
1.2
1.0
0.8
0.6
L = 33µH
RIND = 0.04
VOUT = VREG = 50mV
ILOAD = 2A
ILOAD = 1A
-50 -25
0
25
50
75
100
JUNCTION TEMPERATURE (°C)
Figure 6. Operating Quiescent Current
Switch ON
Switch OFF
24
20
16
12
8
4
0
-50 -25
0
25
50
75
100
JUNCTION TEMPERATURE (°C)
125
4.5V < VIN < 40V
ISWITCH = 0
Figure 8. Minimum Operating Supply Voltage
JUNCTION TEMPERATURE (°C)
-50 -25
0
25
50
75 100 125
VOUT = 1.23V
ILOAD = 120mA
5
4
3
2
1
0
Figure 9. SD Pin Current (Sinking)
0
5
10
15
20
25
SD PlN VOLTAGE(V)
VIN = 40V
TJ = -40°C and 125°C
8
6
5
4
3
2
7
1
0
Figure 10. Switching Frequency
JUNCTION TEMPERATURE (°C)
-50 -25
0
25
50
75 100 125
160
150
145
140
135
130
155
120
TJ = -40°C and 125°C
TJ = 25°C
VON/OFF = 5V
SUPPLY VOLTAGE (V)
150
80
60
40
20
0
0
10
20
30
40
100
Figure 7. Shutdown Quiescent Current
Typical Performance Characteristics


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