MB39A103 查看數據表（PDF） - Fujitsu

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MB39A103

4-ch DC/DC Converter IC for low voltage

Fujitsu 

MB39A103

Triangular Wave Oscillation Frequency

vs. Timing Resistor

10000

TA = +25 °C

VCC = 4 V

CTL = 3 V

1000

CT = 39 pF

100

CT = 100 pF

CT = 560 pF CT = 220 pF

Triangular Wave Oscillation Frequency

vs. Timing Capacitor

10000

TA = +25 °C

VCC = 4 V

CTL = 3 V

1000

RT = 11 kΩ

100

RT = 24 kΩ

RT = 130 kΩ RT = 56 kΩ

10

1

10

100

1000

Timing resistor RT (kΩ)

10

10

100

1000

Timing capacitor CT (pF)

10000

Triangular Wave Upper and Lower Limit Voltage

vs. Triangular Wave Oscillation Frequency

1.2 TA = +25 °C

1.1 VCC = 4 V

CTL = 3 V

1.0 RT = 24 kΩ

0.9

0.8

0.7

Upper

0.6

0.5

0.4

Lower

0.3

0.2

0 200 400 600 800 1000 1200 1400 1600

Triangular wave oscillation frequency fOSC (kHz)

Triangular Wave Upper and Lower Limit Voltage

vs. Operating Ambient Temperature

1.2

VCC = 4 V

1.1 CTL = 3 V

1

RT = 24 kΩ

CT = 100 pF

0.9

Upper

0.8

0.7

0.6

0.5

Lower

0.4

0.3

0.2

−40 −20 0

20 40 60 80 100

Operating ambient temperature TA (°C)

Triangular Wave Oscillation Frequency

vs. Operating Ambient Temperature

560

VCC = 4 V

CTL = 3 V

540

RT = 24 kΩ

CT = 100 pF

520

500

480

460

440

−40 −20 0 20 40 60 80 100

Operating ambient temperature TA (°C)

10

(Continued)

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