MB3800 datasheet(9/20 Pages) FUJITSU

Part #	MB3800

Description	Switching Regulator Controller (Low Voltage)

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Manufacturer	FUJITSU [Fujitsu Component Limited.]

Direct Link	http://edevice.fujitsu.com/fmd/en/index.html

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9 / 20 page

MB3800

9

(Continued)

-10

-0.4

BR/CTL pin input current I BR (mA)

Output source current vs. BR/CTL pin input current

0

-0.8

-1.2

-1.6

-2.0

-20

-30

-40

-50

V CC = 2 V

V OUT = 0.9 V

T a = +25

°C

100

-0.4

BR/CTL pin input current I BR (mA)

BR/CTL pin input voltage vs. BR/CTL pin input current

0

-0.8

-1.2

-1.6

-2.0

200

300

400

500

V CC = 2 V

T a = +25

°C

1.0

-20

BR/CTL pin input current I BR (

µA)

Average supply current vs. BR/CTL pin input current

0

-40

-60

-80

-100

2.0

3.0

4.0

5.0

V CC = 2 V

T a = +25

°C

1 k

Timing resistor R T (

Ω)

Oscillation frequency vs.Timing resistor

10 k

2 k

50 k

500 k

2

Supply voltage V CC (V)

Frequency variation ratio vs. Supply voltage

-15

0

5

10

-5

0

-10

4

6

8

10

12

14

16

C T = 270 pF

R T = 3.0 k

Ω

Ta = +25

°C

-20

Operating ambient temperature T a (

°C)

Frequency variation ratio vs. Operating ambient temperature

-15

-40

5

10

-5

0

-10

0

+20

+40

+60

+80 +100

V CC = 2 V

C T = 270 pF

R T = 3.0 k

Ω

5 k

20 k

200 k

5 k

2 k

10 k

100 k

1 M

20 k

C T = 100 pF

C T = 1000 pF

C T = 10000 pF

V CC = 2 V

T a = +25

°C

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