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MB39A108

5 ch DC/DC Converter IC with Synchronous Rectification

Fujitsu 

MB39A108

(Continued)

( VCC = VCCO = 4 V, Ta = + 25 °C)

Parameter

Symbol Pin No.

Conditions

Value

Unit

Min Typ Max

PWM compara-

tor block (CH1)

[PWM Comp.1]

Threshold

voltage

VT0

VT100

33, 34 Duty cycle = 0%

33, 34 Duty cycle = 100%

0.35 0.4 0.45 V

0.85 0.9 0.95 V

PWM compara- Threshold

tor block

voltage

(CH2 to CH5)

[PWM Comp.2 to Maximum

PWM Comp.5] duty cycle

VT0

VT100

Dtr

29 to 32 Duty cycle = 0%

29 to 32 Duty cycle = 100%

29 to 32

CT = 100 pF,

RT = 6.8 kΩ

0.35 0.4 0.45 V

0.85 0.9 0.95 V

85

90

95 %

Output source

current

ISOURCE

Duty ≤ 5%

29 to 34 (t = 1/fosc × Duty)

OUT = 0 V

⎯ − 130 − 75 mA

Output block

(CH1 to CH5)

Output sink

current

[Drive1 to Drive5] Output on

resistor

Duty ≤ 5%

ISINK 29 to 34 (t = 1/fosc × Duty)

OUT = 4 V

ROH 29 to 34 OUT = − 15 mA

ROL 29 to 34 OUT = 15 mA

75

130 ⎯ mA

⎯

18

27 Ω

⎯

18

27 Ω

Dead time

tD1 33, 34 OUT2 − OUT1

tD2 33, 34 OUT1 − OUT2

⎯

50*

⎯ ns

⎯

50*

⎯ ns

Short-circuit

detection block

[SCP Comp.]

Threshold

voltage

Input bias

current

VTH

34

⎯

IB

10 − INS = 0 V

0.97 1.00 1.03 V

− 25 − 20 − 17 µA

Control block

(CTL, CTL3 to

CTL5)

Output on

condition

Output off

condition

VIH 6, 7 to 9 CTL, CTL3 to CTL5

VIL 6, 7 to 9 CTL, CTL3 to CTL5

1.5

⎯

11 V

0

⎯

0.5 V

[CTL, CHCTL]

ICTLH 6, 7 to 9 CTL, CTL3 to CTL5 = 3 V 5

30

60 µA

Input current

ICTLL 6, 7 to 9 CTL, CTL3 to CTL5 = 0 V ⎯

⎯

1 µA

General

Standby

current

ICCS

5 CTL, CTL3 to CTL5 = 0 V ⎯

0

ICCSO

35 CTL = 0 V

⎯

0

Power supply

current

ICC

5 CTL = 3 V

⎯

4

2 µA

1 µA

6 mA

* : Standard design value

11

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