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MB39A123

6 ch DC/DC Converter IC with Synchronous Rectification

Fujitsu 

MB39A123

(VCC = VCCO = 4 V, Ta = +25 °C)

Parameter

Symbol Pin No.

Conditions

Value

Unit

Min Typ Max

Error Amp Block

(ch.2 to ch.6)

[Error Amp2 to

Error Amp6]

Output source

current

Output sink

current

ISOURCE

ISINK

15, 22,

25, 42, FB2 to FB6 = 0.65 V

45

15, 22,

25, 42, FB2 to FB6 = 0.65 V

45

⎯ −2 −1 mA

150 200 ⎯ µA

Input offset

voltage

VIO

18 OUTA = 1.23V

−10 0 + 10 mV

Input bias

current

IB

19 − INA = 0V

−120 −30 ⎯ nA

Voltage gain

AV

18 DC*

⎯ 100 ⎯ dB

Inverting Amp

Block (ch.4)

[Inv Amp]

Frequency

bandwidth

Output

voltage

BW

18 AV = 0 dB*

VOH

18

⎯

VOL

18

⎯

⎯ 1.0 ⎯ MHz

1.7 1.9 ⎯ V

⎯ 40 200 mV

Output source

current

ISOURCE

18 OUTA = 1.23V

⎯ −2 −1 mA

Output sink

current

ISINK

18 OUTA = 1.23V

150 200 ⎯ µA

PWM

Comparator

Block

(ch.1)

[PWM Comp.1]

Threshold

voltage

VT0 34, 35 Duty cycle = 0%

VT100 34, 35 Duty cycle = 100%

0.35 0.4 0.45 V

0.85 0.9 0.95 V

PWM

Comparator

Block

Threshold

voltage

(ch.2 to ch.6) Maximum duty

[PWM Comp.2 to cycle

PWM Comp.6]

VT0

VT100

Dtr

29 to 33 Duty cycle = 0%

29 to 33 Duty cycle = 100%

29 to 33

CT = 100 pF,

RT = 6.8 kΩ

0.35 0.4 0.45 V

0.85 0.9 0.95 V

87 92 97 %

Output source

current

ISOURCE

29 to 35

Duty ≤ 5%

OUT = 0 V

⎯ −130 −75 mA

Output sink

Output Block current

(ch.1 to ch.6)

[Drive1 to Drive6]

Output on

resistor

ISINK

29 to 35

Duty ≤ 5%

OUT = 4 V

ROH 29 to 35 OUT = − 15 mA

ROL 29 to 35 OUT = 15 mA

75 130 ⎯ mA

⎯ 18 27 Ω

⎯ 18 27 Ω

Dead time

tD1

34, 35 OUT2 − OUT1 *

tD2

34, 35 OUT1 − OUT2 *

⎯ 50 ⎯ ns

⎯ 50 ⎯ ns

(Continued)

11

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