MIC4685
Micrel
Typical Safe Operating Area (SOA)
(SOA measured on the MIC4685 Evaluation Board*)
5V Output SOA
Standard Configuration
5.0
OUTPUT CURRENT (A)
OUTPUT CURRENT (A)
T = 25°C
4.5
A
T
J
= 125°C
4.0
D = Max
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0.0
0
5.0
OUTPUT CURRENT (A)
4.5 T
A
= 25°C
4.0 T
J
= 125°C
3.5 D = Max
3.0
2.5
2.0
1.5
1.0
0.5
0.0
0
T
A
= 60°C
T
J
= 125°C
D = Max
5
10 15 20 25 30
INPUT VOLTAGE (V)
35
3.3V Output SOA
Standard Configuration
5.0
2.5V Output SOA
Standard Configuration
4.5 T
A
= 25°C
4.0 T
J
= 125°C
3.5 D = Max
3.0
2.5
2.0
1.5
1.0
0.5
0.0
T
A
= 60°C
T
J
= 125°C
D = Max
0
5
10 15 20 25 30
INPUT VOLTAGE (V)
35
T
A
= 60°C
T
J
= 125°C
D = Max
5
10 15 20 25 30
INPUT VOLTAGE (V)
35
1.8V Output SOA
Standard Configuration
5.0
OUTPUT CURRENT (A)
OUTPUT CURRENT (A)
T = 25°C
4.5
A
T = 125°C
4.0
J
D = Max
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0.0
0
T
A
= 60°C
T
J
= 125°C
D = Max
5
10 15 20 25 30
INPUT VOLTAGE (V)
35
4.5
5.0V Output SOA
Bootstrap Configuration
4.5
OUTPUT CURRENT (A)
4.0
T = 25°C
4.0
A
T
J
= 125°C
3.5 D = Max
3.0
2.5
2.0
1.5
1.0
0.5
0.0
6
8
T
A
= 60°C
T
J
= 125°C
D = Max
10 12 14 16
INPUT VOLTAGE (V)
18
3.3V Output SOA
Bootstrap Configuration
T
A
= 25°C
T
J
= 125°C
3.5 D = Max
3.0
2.5
2.0
1.5
1.0
0.5
0.0
3
5
T
A
= 60°C
T
J
= 125°C
D = Max
7 9 11 13 15 17
INPUT VOLTAGE (V)
2.5V Output SOA
Bootstrap Configuration
5.0
OUTPUT CURRENT (A)
OUTPUT CURRENT (A)
T = 25°C
4.5
A
T = 125°C
4.0
J
D = Max
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0.0
5.0
1.8V Output SOA
Bootstrap Configuration
T = 25°C
4.5
A
T = 125°C
4.0
J
D = Max
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0.0
T
A
= 60°C
T
J
= 125°C
D = Max
3
5
7 9 11 13 15 17
INPUT VOLTAGE (V)
T
A
= 60°C
T
J
= 125°C
D = Max
3
5
7 9 11 13 15 17
INPUT VOLTAGE (V)
* I
OUT
< 3A, D1: Diode Inc. B340 (3A/40V)
I
OUT
> 3A, D1: SBM1040 (10A/40V)
September 2002
7
MIC4685
MICREL [ MICREL SEMICONDUCTOR ]
