MB3878 Datasheet, PDF (6/24 Pages) Fujitsu Component Limited. – DC/DC Converter IC for Charging

MB3878
s ELECTRICAL CHARACTERISTICS
Parameter
(Ta = +25 °C, VCC = 19 V, VCC (O) = 19 V, VREF = 0 mA)
Symbol
Pin
No.
Conditions
Min.
Value
Typ.
Unit
Max.
Reference
voltage block
(Ref)
Output voltage
Input stability
Load stability
VREF
Line
Load
Ta = +25 °C
4.995
6
Ta = −30 °C to +85 °C 4.945
6 VCC = 7 V to 25 V

6 VREF = 0 mA to −1 mA 
5.000
5.000
3
1
5.045 V
5.055 V
10 mV
10 mV
Short-circuit
output current
Ios
6 VREF = 1 V
−25 −15
−5 mA
VTLH
Threshold voltage
Under voltage
VTHL
lockout protection
circuit block
Hysteresis width
VH
(UVLO)
Threshold voltage
VTLH
VTHL
18
VCC = VCC (O) ,
VCC =
18
VCC = VCC (O) ,
VCC =
18 VCC = VCC (O)
6 VREF =
6 VREF =
6.1
6.4
6.7 V
5.1
5.4
5.7 V
0.7
1.0
1.3 V
2.6
2.8
3.0 V
2.4
2.6
2.8 V
Hysteresis width
VH
6 VH = VTLH − VTHL
0.05 0.20 0.35 V
Soft-start block
(SOFT)
Charge current
ICS
22

−1.3 −0.8 −0.5 µA
Triangular
waveform
oscillator circuit
block (OSC)
Oscillation
frequency
Frequency
temperature
stability
fOSC 20 RT = 47 kΩ
260 290 320 kHz
∆f/fdt 20 Ta = −30 °C to +85 °C 
1*

%
Input offset
voltage
VIO
3, 4,
8, 9
FB1 = FB2 = 2 V

1
5 mV
Input bias current
IB
3, 4,
8, 9

−100 −30
 nA
Error amplifier
block
(Error Amp.1,
Error Amp.2)
Common mode
input voltage
range
Voltage gain
Frequency
bandwidth
VCM
3, 4,
8, 9

AV 5, 7 DC
BW 5, 7 AV = 0 dB
0

VCC −
1.8
V

100*  dB

2.0*
 MHz
VFBH 5, 7

Output voltage
VFBL 5, 7

4.7
4.9

V

20
200 mV
Output source
current
ISOURCE 5, 7 FB1 = FB2 = 2 V

−2.0 −0.6 mA
Output sink
current
ISINK 5, 7 FB1 = FB2 = 2 V
150 300
 µA
* : Standard design value.
6
(Continued)