MIC3808 Datasheet, PDF (6/11 Pages) Micrel Semiconductor – Push-Pull PWM Controller

MIC3808/3809
Typical Characteristics
MIC3808 V_DD
vs. I_DD
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
00
5
10
15
V_DD (V)
MIC3809 Oscillator
Frequency Variation
3 ^{vs. Temperature}
V_DD = 5V
2
1
0
V_DD = 10V
-1
-2
--340 _{-20 0 20 40 60 80 100120140}
TEMPERATURE (°C)
RC Pin Resistance
vs. Deadtime
89
88
87
86
85
84
83
RESISTANCE (kΩ)
MIC3808 Current Limit
Threshold vs. V_DD
0.501
0.499
0.497
0.495
0.493
0.491
0.4898 _{9 10 11 12 13 14 15 16}
V_DD (V)
MIC3808/3809
MIC3809 V_DD
7
vs. I_DD
6
5
4
3
2
1
00 _{2 4 6 8 10 12 14 16}
V_DD (V)
1M
100k
Frequency
vs. RC Values
C = 100pF
V_DD = 10V
C = 220pF
C = 270pF
C = 330pF
C = 470pF
C = 680pF
C = 1000pF
10k
0
50k 100k 150k
RESISTANCE (kΩ)
200k
MIC3809 V_REFERENCE
vs. V_DD
2.05
2.03
2.01
1.99
1.97
1.95
1.93
1.91
1.89
1.87
1.854 _{6 8 10 12 14 16 18}
V_DD (V)
MIC3809 Current Limit
Threshold vs. V_DD
0.505
0.503
0.501
0.499
0.497
0.495
0.4934 _{6 8 10 12 14 16}
V_DD (V)
6
Micrel
MIC3809 Oscillator Variation
vs. V_DD
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
-0.1
-0.2
-0.3
-0.40 _{2 4 6 8 10 12 14}
V_DD (V)
RC Pin Capacitance
vs. Deadtime
200
175
150
125
100
75
50
CAPACITANCE (pF)
2.015
2.010
2.005
2.000
1.995
1.990
1.985
1.980
1.975
1.9708
MIC3808 V_REFERENCE
vs. V_DD
9 10 11 12 13 14 15 16
V_DD (V)
Error Amplifier Reference
Voltage vs. Temperature
2.02
2.02
2.01
2.01
2.00
2.00
1.99
1.99
1.98
1.98
1.9-740 _{-20 0 20 40 60 80 100120140}
TEMPERATURE (°C)
April 2005