MIC3808BMM Micrel Inc, MIC3808BMM Datasheet - Page 6

• Manufacturer Part Number: MIC3808BMM
• Description: IC CTRLR DC/DC PUSH-PULL 8-MSOP
• Manufacturer: Micrel Inc

Specifications of MIC3808BMM

• Pwm Type: Current Mode
• Number Of Outputs: 1
• Frequency - Max: 1MHz
• Duty Cycle: 50%
• Voltage - Supply: 2 V ~ 14 V
• Buck: Yes
• Boost: No
• Flyback: No
• Inverting: No
• Doubler: No
• Divider: No
• Cuk: No
• Isolated: Yes
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 8-MSOP, Micro8™, 8-uMAX, 8-uSOP,
• Frequency-max: 1MHz
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

MIC3808/3809
Typical Characteristics
MIC3808/3809
0.501
0.499
0.497
0.495
0.493
0.491
0.489
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
89
88
87
86
85
84
83
-1
-2
-3
-40 -20 0 20 40 60 80 100120140
3
2
1
0
0
0
8
MIC3808 Current Limit
Frequency Variation
9 10 11 12 13 14 15 16
MIC3809 Oscillator
RC Pin Resistance
Threshold vs. V
vs. Temperature
TEMPERATURE (°C)
RESISTANCE (kΩ)
vs. Deadtime
MIC3808 V
5
vs. I
V
V
DD
DD
DD
(V)
(V)
V
DD
V
10
DD
DD
= 5V
DD
= 10V
15
0.505
0.503
0.501
0.499
0.497
0.495
0.493
100k
2.05
2.03
2.01
1.99
1.97
1.95
1.93
1.91
1.89
1.87
1.85
10k
1M
4
4
0
7
6
5
4
3
2
1
0
0
C = 1000pF
C = 100pF
MIC3809 Current Limit
MIC3809 V
6
Threshold vs. V
2
6
C = 220pF
50k
vs. RC Values
RESISTANCE (kΩ)
4
C = 270pF
8
MIC3809 V
Frequency
8
vs. V
C = 330pF
6
10 12 14 16 18
V
V
6
vs. I
V
100k
DD
DD
10
REFERENCE
DD
C = 470pF
8 10 12 14 16
DD
(V)
(V)
DD
(V)
12
V
C = 680pF
DD
DD
150k
DD
= 10V
14
200k
16
2.015
2.010
2.005
2.000
1.995
1.990
1.985
1.980
1.975
1.970
2.02
2.02
2.01
2.01
2.00
2.00
1.99
1.99
1.98
1.98
1.97
-0.1
-0.2
-0.3
-0.4
200
175
150
125
100
0.7
0.6
0.5
0.4
0.3
0.2
0.1
75
50
-40 -20 0 20 40 60 80 100120140
MIC3809 Oscillator Variation
0
0
8
Error Amplifier Reference
Voltage vs. Temperature
MIC3808 V
9
RC Pin Capacitance
2
TEMPERATURE (°C)
CAPACITANCE (pF)
10 11 12 13 14 15 16
vs. Deadtime
4
vs. V
vs. V
V
V
6
DD
DD
REFERENCE
DD
(V)
(V)
DD
8
10 12 14
April 2005
Micrel