bd9842fv ROHM Co. Ltd., bd9842fv Datasheet - Page 2

• Manufacturer Part Number: bd9842fv
• Description: Dual-output High Voltage High-frequency Step-down Switching Regulator Controller Type
• Manufacturer: ROHM Co. Ltd.

●Electric characteristics (Ta25°C, VCC=6V unless otherwise specified)
[VREF output unit]
Output voltage
Input stability
Load stability
Current capacity
[Triangular wave oscillator]
Oscillation frequency
Frequency fluctuation
CT source current
CT sink current
[Soft start unit]
SS source current
SS sink current
[Pause period adjusting circuit]
DT input bias current
DT sink current
[Low input malfunction preventing circuit]
Threshold voltage
Hysteresis
[Error amplifier]
Non-inverting input
reference voltage
Reference voltage supply
fluctuation
INV input bias current
Open gain
Max output voltage
Min output voltage
Output sink current
Output source current
[PWM comparator]
Input threshold voltage
（fosc=100kHz）
（fosc=100kHz）
[Output unit]
Output ON resistance H
Output ON resistance L
C5V clamp voltage
[Overcurrent protection circuit]
Overcurrent detection
threshold voltage
OCP-input bias current
Overcurrent detection
delay time
Overcurrent detection
minimum retention time
Item
Load reg.
Line reg.
V
Symbol
tdocpth
tdocpre
V
V
I
I
I
dVinv
I
R
F
V
R
I
V
V
Vt
OMAX
I
I
I
V
OCPTH
V
I
CTSO
SSSO
FBSO
F
OCP
CTSI
SSSI
DTSI
UHYS
FBSI
CLMP
I
Vt
AV
OSC
UTH
I
ONH
REF
FBH
ONL
DT
FBL
INV
DV
IB
100
0
-
Minimum
2.450
0.99
2.30
0.04
190
190
1.4
3.0
0.5
1.4
1.9
4.5
0.8
95
70
50
－
－
－
－
－
－
－
－
－
－
－
－
2
5
1
Standard value
Standard
2.500
2/15
0.15
0.05
106
200
200
105
200
3.2
0.6
1.5
1.5
4.0
3.3
0.1
1.6
0.1
3.3
85
13
12
－
1
2
0
2
1
1
0
2
5
Maximum
VREF
2.550
0.25
1.01
0.06
210
210
400
117
2.6
3.4
1.3
1.6
2.1
5.5
10
10
10
10
10
－
－
－
－
－
－
－
1
1
6
1
Unit
kHz
mV
mV
mA
mA
mA
mV
mA
mS
μA
μA
μA
μA
μA
μA
μA
dB
nS
%
Ω
Ω
V
V
V
V
V
V
V
V
V
V
I
CT=1.75 V
CT=1.75 V
On duty 0%
Vcc=3.6 V→35 V
I
V
C
Vcc=3.6 V→35 V
SS=0.5 V
SS=0.5 V
DT=1.75 V
DT=1.75 V, (OCP+)-(OCP-)=0.5 V
Vcc start detection
INV=FB
Vcc=3.6 V→35 V
INV=1 V
FB=1.25 V, INV=1.5 V
FB=1.25 V, INV=0.5 V
On duty 100%
R
R
V
Voltage between (OCP+) and
(OCP-)
OCP+= V
OCP-= V
OCP-= V
O
O
REF
CLMP
CP
ONH
ONL
=0.1 mA
=0.1 mA→2 mA
=1800 pF
=(typ.)＊0.95
=(OUT-C5 V)/ Iout, Iout=0.1 A
=( V
= V
CC
CC
CC
CC,
CC
→V
-0.2 V→V
-C5V , V
-OUT)/ Iout, Iout=0.1 A
Condition
OCP-= V
CC
-0.2 V
CC
CC
CC
＞7 V
-0.5 V