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參數(shù)資料
| 型號： | MB3885 |
| 廠商： | Fujitsu Limited |
| 英文描述： | 1-channel DC/DC Converter IC with Synchronous Rectifier |
| 中文描述： | 1通道DC / DC變換器的同步整流集成電路 |
| 文件頁數(shù)： | 7/29頁 |
| 文件大小： | 239K |
| 代理商： | MB3885 |
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MB3885
7
I
ELECTRICAL CHARACTERISTICS
(VCC
=
12 V, VB
=
0 mA, VREF
=
0 mA, Ta
=
+
25
°
C)
* : Standard design value
(Continued)
Parameter
Symbol Pin No.
Conditions
Value
Unit
Min.
Typ.
Max.
1.
Reference
Voltage Block
[Ref]
Output voltage
V
REF
V
REF
/
V
REF
18
Ta
=
+
25
°
C
2.475
2.500
2.525
V
18
Ta
=
0
°
C to
+
85
°
C
0.5*
%
Input stability
Line
18
VCC
=
5.5 V to 18 V
VREF
=
0 mA to
1 mA
1
10
mV
Load stability
Load
18
3
10
mV
Short output
current
Ios
18
VREF
=
2 V
28
14
7
mA
2.
Bias Voltage
Block
[VB]
Output voltage
VB
11
4.95
5.05
5.15
V
3.
Undervoltage
Lockout
Circuit Block
[UVLO]
Threshold
voltage
V
TH
10
VCC
=
2.6
2.9
3.2
V
Hysteresis
width
V
H
10
0.2*
V
Reset voltage
V
RST
10
1.7
2.1
2.5
V
4.
Soft Start
Block
[CS]
Charge
current
I
CS
6
14
10
6
μ
A
5.
Short
Detection
Comparator
Block
[SCP]
Threshold
voltage
V
TH
3
0.63
0.68
0.73
V
Input source
current
I
CSCP
3
1.4
1.0
0.6
μ
A
Short
detection time
t
SCP
3
CSCP
=
0.01
μ
F
4.5
6.8
12.2
ms
6.
Triangular
Wave
Oscillator
Block
[OSC]
Oscillator
frequency
f
OSC
4
RT
=
10 k
, CT
=
470 pF
170
190
210
kHz
Frequency
temperature
variation rate
f
OSC
/
f
OSC
4
Ta
=
0
°
C to
+
85
°
C
1*
%
7.
Error Amp
Block
[Error Amp.]
Threshold
voltage
V
TH1
8
FB
=
1.6 V,
Ta
=
+
25
°
C
FB
=
1.6 V,
Ta
=
0
°
C to
+
85
°
C
1.241
1.2500
1.259
V
V
TH2
8
1.2375
1.2500
1.2625
V
Input bias
current
I
B
8
INE
=
0 V
200
20
nA
Voltage gain
A
V
7
DC
60
100
dB
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