MIC3808_11 datasheet(6/11 Pages) MIC

Part #	MIC3808

Description	Push-Pull PWM Controller

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Manufacturer	MIC [MIC GROUP RECTIFIERS]

Direct Link	http://www.cnmic.com

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MIC3808/3809

Micrel

MIC3808/3809

6

April 2005

Typical Characteristics

0

0.5

1.0

1.5

2.0

2.5

3.0

3.5

4.0

0

5

10

15

V

DD (V)

MIC3808 V

DD

vs. I

DD

0

1

2

3

4

5

6

7

0

2

4

6

8

10121416

V

DD (V)

MIC3809 V

DD

vs. I

DD

-0.4

-0.3

-0.2

-0.1

0

0.1

0.2

0.3

0.4

0.5

0.6

0.7

02468

10

12

14

V

DD (V)

MIC3809 Oscillator Variation

vs. V

DD

RESISTANCE (kΩ)

Frequency

vs. RC Values

C = 330pF

C = 100pF

C = 220pF

C = 1000pF

C = 680pF

C = 470pF

V

DD = 10V

C = 270pF

10k

100k

1M

50k

100k

150k

200k

0

50

75

100

125

150

175

200

CAPACITANCE (pF)

RC Pin Capacitance

vs. Deadtime

83

84

85

86

87

88

89

RESISTANCE (kΩ)

RC Pin Resistance

vs. Deadtime

1.970

1.975

1.980

1.985

1.990

1.995

2.000

2.005

2.010

2.015

8

9

10 11 12 13 14 15 16

V

DD (V)

MIC3808 V

REFERENCE

vs. V

DD

0.489

0.491

0.493

0.495

0.497

0.499

0.501

8

9

10 11 12 13 14 15 16

V

DD (V)

MIC3808 Current Limit

Threshold vs. V

DD

0.493

0.495

0.497

0.499

0.501

0.503

0.505

4

6

8

10

12

14

16

V

DD (V)

MIC3809 Current Limit

Threshold vs. V

DD

-3

-2

-1

0

1

2

3

-40 -20 0 20 40 60 80 100120140

TEMPERATURE (°C)

MIC3809 Oscillator

Frequency Variation

vs. Temperature

V

DD = 5V

V

DD = 10V

1.85

1.87

1.89

1.91

1.93

1.95

1.97

1.99

2.01

2.03

2.05

4

6

8

1012141618

V

DD (V)

MIC3809 V

REFERENCE

vs. V

DD

1.97

1.98

1.99

2.00

2.01

2.02

-40 -20 0 20 40 60 80 100120140

TEMPERATURE (°C)

Error Amplifier Reference

Voltage vs. Temperature

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