MB3885 Datasheet, PDF (7/29 Pages) Fujitsu Component Limited. – 1-channel DC/DC Converter IC with Synchronous Rectifier

MB3885
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
18 Ta = +25 °C
2.475 2.500 2.525 V
18 Ta = 0 °C to +85 °C

0.5*

%
18 VCC = 5.5 V to 18 V

1
10 mV
18 VREF = 0 mA to −1 mA 
3
10 mV
Short output
current
Ios
18 VREF = 2 V
−28
−14
−7 mA
2.
Bias Voltage
Block
Output voltage
VB
11
[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
10 VCC =
10

10

6

2.6
2.9
3.2 V

0.2*

V
1.7
2.1
2.5 V
−14
−10
−6 µA
3

0.63 0.68 0.73 V
3

−1.4 −1.0 −0.6 µA
3 CSCP = 0.01 µF
4.5
6.8 12.2 ms
4 RT = 10 kΩ, CT = 470 pF 170
190
210 kHz
4 Ta = 0 °C to +85 °C
8
FB = 1.6 V,
Ta = +25 °C
8
FB = 1.6 V,
Ta = 0 °C to +85 °C
8 −INE = 0 V
7 DC

1*

%
1.241 1.2500 1.259 V
1.2375 1.2500 1.2625 V
−200 −20
60
100
 nA
 dB
* : Standard design value
(Continued)
7