MB3821 Datasheet, PDF (7/24 Pages) Fujitsu Component Limited. – 2-ch DC/DC Converter IC With Synchronous Rectifier

MB3821
(Continued)
Parameter
Threshold voltage
VT temperature stability
Input bias current
Voltage gain
Frequency bandwidth
Output voltage
Output source current
Output sink current
Threshold voltage
Symbol
Pin
No.
Conditions
VTH 6,19 FB = 1.6 V
∆VT
/VT
6,19 Ta = –30°C to +85°C
IB 5,20 −IN = 0 V
AV 6,19 DC
BW 6,19 AV = 0 dB
VOH 6,19
—
VOL
ISOURCE
ISINK
6,19
—
6,19 FB = 1.6 V
6,19 FB = 1.6 V
VTL _8,11 Duty cycle = 0 %
VTH ^14,17 Duty cycle = Dtr
(VCC = 16 V, SEL =0 V, Ta = +25°C)
Min.
Value
Typ.
Unit
Max.
1.235 1.260 1.285 V
—
0.5*
—%
–200
60
—
VREF –
0.3
—
—
1.5
1.2
–50
100
800*
—
0.8
–90
6.0
1.3
— nA
— dB
— kHz
—
V
1.0 V
–45 µA
— mA
—
V
—
1.9
2.0 V
Maximum duty cycle
SEL = 0 V 85
90
95 %
Dtr
8,11, CT = 500 pF
14,17 RT = 10 kΩ
SEL = 5 V 89
94
99 %
Output voltage
(Main side)
VOH
8,17
VS = 16 V
IO = –30 mA
CB –
1.4
CB = 22 V
VOL 8,17
IO = 30 mA —
Output voltage
(Synchronous rectifier side)
Diode voltage
CTL input voltage
VOH
VOL
VDIODE
VIH
VIL
11,14 IO = –30 mA
11,14 IO = 30 mA
13 IO = 10 mA
18 IC active mode
18 IC standby mode
Input current
ICTL
18 CTL = 5 V
Standby current
Power supply current
ICCS
23 CTL = 0 V
23
SEL = 0 V
(Normal mode)
ICC
23
SEL = 5 V
(Low power mode)
*: Standard design value.
VB –
1.4
—
—
2.0
—
—
—
—
—
CB –
1.1
VS +
1.1
VB –
1.1
0.1
1.0
—
—
50
—
5.2
1.0
—
V
VS +
1.4
V
—
V
0.5 V
1.1 V
—
V
1.0 V
80 µA
10 µA
7.8 mA
1.5 mA
7