MB3887 Datasheet, PDF (8/33 Pages) Fujitsu Component Limited. – DC/DC Converter IC for Charging Li-ion battery

MB3887
■ ELECTRICAL CHARACTERISTICS
(Ta = +25 °C, VCC = 19 V, VCC (O) = 19 V, VREF = 0 mA)
Parameter
Sym- Pin
bol No.
Conditions
Value
Unit
Min
Typ
Max
1.
Reference
voltage block
[REF]
Output voltage
Input stability
Load stability
Short-circuit output
current
VREF1
VREF2
Line
Load
Ios
6 Ta = +25 °C
4.967
6 Ta = −10 °C to +85 °C 4.95
6 VCC = 8 V to 25 V
⎯
6 VREF = 0 mA to −1 mA ⎯
6 VREF = 1 V
−50
5.000
5.00
3
1
−25
5.041 V
5.05 V
10 mV
10 mV
−12 mA
2.
Threshold voltage
Under voltage
lockout protec-
tion circuit
Hysteresis width
block
[UVLO]
Threshold voltage
VTLH
18
VCC = VCC (O) ,
VCC =
VTHL
18
VCC = VCC (O) ,
VCC =
VH 18 VCC = VCC (O)
VTLH 6 VREF =
VTHL 6 VREF =
6.2
6.4
6.6
V
5.2
5.4
5.6
V
⎯
1.0*
⎯
V
2.6
2.8
3.0
V
2.4
2.6
2.8
V
Hysteresis width
VH
6
⎯
⎯
0.2
⎯
V
3.
Soft-start block Charge current
ICS 22
⎯
[SOFT]
−14
−10
−6 µA
4.
Triangular
waveform os-
cillator 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
5-1.
Error amplifier
block
[Error Amp1,
Error Amp2]
In-phase input
voltage range
Voltage gain
Frequency
bandwidth
Output voltage
VCM
3, 4,
8, 9
⎯
AV 5, 7 DC
BW 5, 7 AV = 0 dB
VFBH 5, 7
⎯
VFBL 5, 7
⎯
0
⎯ VCC − 1.8 V
⎯
100*
⎯ dB
⎯
2*
⎯ MHz
4.7
4.9
⎯
V
⎯
20
200 mV
Output source
current
ISOURCE 5, 7 FB1 = FB2 = 2 V
⎯
−2
−1 mA
Output sink current ISINK 5, 7 FB1 = FB2 = 2 V
150
300
⎯ µA
* : Standard design value.
(Continued)
8