MB3886 데이터 시트보기 (PDF) - Fujitsu

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MB3886

2-Channel DC/DC Converter IC with Overcurrent Protection Symmetrical-Phase Type

Fujitsu 

MB3886

s ELECTRICAL CHARACTERISTICS

Parameter

Sym- Pin

bol No.

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

Conditions

Values

Unit

Min

Typ

Max

1. Reference

Voltage

Block [Ref]

Output voltage

VREF

∆VREF/

VREF

Input stability Line

Load stability Load

27 Ta = +25 °C

27 Ta = 0 °C to +85 °C

27 VCC = 5.5 V to 18 V

27 VREF = 0 mA to −1 mA

3.465







3.500

0.5*

1

3

3.535 V



%

10 mV

10 mV

Short-circuit

output current

Ios

27 VREF = 2 V

−28

−14

−7 mA

2. Bias Voltage

Block [VB]

Output voltage

VB

16



5.0

5.1

5.2

V

Oscillator

3. Triangular frequency

fOSC

4 RT = 9.1 kΩ, CT = 330 pF 260

290

320 kHz

Waveform

Oscillator

Block [OSC]

Frequency/

temperature

variation

∆fOSC/

fOSC

4 Ta = 0 °C to 85 °C



1*



%

Threshold

4. Undervolt- voltage

VTH 26 VCC =

age (VCC)

Lockout Circuit

Block [UVLO]

Hysteresis

width

VH

26



Reset voltage VRST 26



4.7

4.9

5.1

V



0.35*



V

1.7

2.1

2.5

V

5. Short-circuit Threshold

Protection

voltage

VTH

25



Circuit Block Input source

[SCP]

current

ICSCP

25



0.63

0.68

0.73 V

−14

−10

−6 µA

6. Overcurrent

Protection

Circuit Block

[OCP]

ILIM terminal

input current

Offset voltage

ILIM 3, 28 RT = 9.1 kΩ

VIO 3, 28



106

118

130 µA



1*

 mV

7. Overvoltage

Protection

Circuit Block

[OVP]

Threshold

voltage

Input bias

current

VTH 10, 21 +INC =

IB 10, 21 +INC = 0 V

1.44

1.47

1.50 V

−200

−30

 nA

8. Latches

Block [Latch1

to Latch3]

Reset voltage

VRST 2, 29 CTL =

0.8

1.4

2

V

9. Protection Output leakage

Status Output current

ILEAK

1, 30 PSIG = 5 V

Circuit Block Output low-

[PSIG]

level voltage

VOL 1, 30 PSIG = 1 mA





40 µA



0.1

0.4

V

* : Typical design value

(Continued)

7

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