MB3882 データシートの表示（PDF） - Fujitsu

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MB3882

2-channel DC/DC Converter IC with Synchronous Rectifier

Fujitsu 

MB3882

s ELECTRICAL CHARACTERISTICS

(VCC = 12 V, VB = 0 mA, VREF = 0 mA, Ta = +25 °C)

Parameter

Symbol Pin No.

Conditions

Min.

Value

Typ.

Unit

Max.

1.

Reference

Voltage Block

[Ref]

Output voltage

Input stability

Load stability

VREF

∆VREF/

VREF

Line

Load

24 Ta = +25 °C

2.475 2.500 2.525 V

24 Ta = 0 °C to +85 °C



0.5*



%

24 VCC = 5.5 V to 18 V



1

10 mV

24 VREF = 0 mA to −1 mA 

3

10 mV

Short output

current

Ios

24 VREF = 2 V

−28

−14

−7 mA

2.

Bias Voltage

Block

Output voltage

VB

13

[VB]



4.95 5.05 5.15 V

3.

Undervoltage

Lockout

Circuit Block

[UVLO]

4.

Soft Start

Block

[CS]

5.

Short

Detection

Comparator

Block

[SCP]

6.

Triangular

Wave

Oscillator

Block

[OSC]

Threshold

voltage

Hysteresis

width

Reset voltage

Charge

current

Threshold

voltage

Input source

current

Short

detection time

Oscillator

frequency

Frequency

temperature

variation rate

VTH

VH

VRST

ICS

VTH

ICSCP

tSCP

fOSC

∆fOSC/

fOSC

VTH1

Threshold

7.

voltage

Error Amp

VTH2

Block

[Error Amp.] Input bias

current

IB

Voltage gain

AV

23 VCC =

23



23



4, 21



2.6

2.9

3.2 V



0.2*



V

1.7

2.1

2.5 V

−14

−10

−6 µA

22



0.63 0.68 0.73 V

22



−1.4 −1.0 −0.6 µA

22 CSCP = 0.01 µF

4.5

6.8 12.2 ms

1 RT = 10 kΩ, CT = 470 pF 170

190

210 kHz

1 Ta = 0 °C to +85 °C

5, 20

5, 20

FB = 1.6 V,

Ta = +25 °C

FB = 1.6 V,

Ta = 0 °C to +85 °C

5, 20 −INE = 0 V

6, 19 DC



1*



%

1.241 1.2500 1.259 V

1.2375 1.2500 1.2625 V

−200 −20

60

100

 nA

 dB

* : Typical setting value

(Continued)

7

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