Micrel, Inc.
MIC2601/2
Typical Characteristics
7
6
5
4
3
2
1
0
0
No Switching FB Pin @ 2V
Quiescent Current
vs. Input Voltage
4.5
4.4
4.3
4.2
4.1
4.0
3.9
3.8
3.7
3.6
Quiescent Current
vs. Temperature
91
90
89
88
87
86
Max Duty Cycle
vs. Input Voltage
246
81 01 21 41 61 8
INPUT VOLTAGE (V)
3.5
-40 -20 0 20 40 60 80 100 120
TEMPERATURE (°C)
No Switching FB Pin @ 2V
85
46
EN = V
IN
81 01 21 41 61 82 0
INPUT VOLTAGE (V)
100
98
96
94
92
90
88
86
84
82
Max Duty Cycle
vs. Temperature
2700
2430
2160
1890
1620
1350
1080
810
540
270
Switch Saturation Voltage
vs. Input Voltage
–0.1A
–0.5A
–0.9A
–1.3A
–1.7A
–0.2A
–0.6A
–1.0A
–1.4A
–0.3A
–0.7A
–1.1A
–1.5A
–0.4A
–0.8A
–1.2A
–1.6A
2700
2430
2160
1890
1620
1350
1080
810
540
270
0
Switch Saturation Voltage
vs. Switch Current
–4V
–5V
–6V
–7V
–8V
–9V
–10V
–12V
–15V
–20V
80
-40 -20 0 20 40 60 80 100 120
TEMPERATURE (°C)
EN = 20V
V
IN
= 20V
0
46
81 01 21 41 61 82 0
INPUT VOLTAGE (V)
SWITCH CURRENT (A)
2.0
1.8
1.6
1.4
1.2
1.0
0.8
0.6
46
Switch Current Limit
vs. Input Voltage
2.0
1.9
1.8
1.7
1.6
1.5
1.4
1.3
1.2
1.1
Switch Current Limit
vs. Temperature
2.0
V
SAT
vs. Temperature
1.5
I
SW
= Current Limit
1.0
I
SW
= 850mA
0.5
I
SW
= 1200mA
I
SW
= 500mA
EN = V
IN
81 01 21 41 61 82 0
INPUT VOLTAGE (V)
V
IN
= 12V
1.0
-40 -20 0 20 40 60 80 100 120
TEMPERATURE (°C)
0
-40 -20 0 20 40 60 80 100 120
TEMPERATURE (°C)
1.270
1.265
1.260
1.255
1.250
1.245
Feedback Voltage
vs. Temperature
1.290
1.285
1.280
1.275
1.270
1.265
1.260
Enable Threshold ON
vs. Temperature
25
24
23
22
21
20
19
18
17
Enable Current
vs. Temperature
V
IN
= 12V
Load = 100mA
1.240
-40 -20 0 20 40 60 80 100 120
TEMPERATURE (°C)
1.255
V
IN
= 12V
1.250
-40 -20 0 20 40 60 80 100 120
TEMPERATURE (°C)
EN = 0V
16
V
IN
= 12V
15
-40 -20 0 20 40 60 80 100 120
TEMPERATURE (°C)
September 2009
4
M9999-090909-A
MICREL [ MICREL SEMICONDUCTOR ]
