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ROHM Semiconductor |
STRUCTURE
Silicon Monolithic Integrated Circuit
TYPE
Positive and Negative Variable Linear Regulator
PRODUCT SERIES
BD3985FV
FEATURES
1. Built-in positive (REG1) and negative (REG2) Linear Regulator for CCDs/ Variable output/
Low saturation voltage type.
2. Built-in Discharge circuit. Negative output voltage (REG2) turns off immediately,
after STB turns off.
○ABSOLUTE MAXIMUM RATINGS (Ta=25℃)
Parameter
Symbol
Limit
Unit
Positive Supply Voltage
VCC
+18 ※1
V
Negative Supply Voltage
VEE
-18 ※1
V
Power Dissipation
Pd
380 ※2
mW
Operating Temperature Range
Topr
-40~+85
℃
Storage Temperature Range
Tstg
-55~+125
℃
Maximum Junction Temperature
Tjmax
125
℃
※1 Not to exceed Pd.
※2 Reduced by 3.8mW/℃ over Ta=25℃ ,during IC without heat sink operation.
○OPERATING CONDITIONS
Parameter
Symbol
Min
Max Unit
Positive Supply Voltage
VCC
+6.0
+18.0
V
Negative Supply Voltage
VEE
-14.0
-6.0
V
REG1 Output Voltage
Vo1
+5.0
+16.0
V
REG2 Output Voltage
Vo2
-8.5
-5.0
V
Output Current 1 Io1 - 25 mA
Output Current 2 Io2 - 50 mA
※ Vdropout(Reg1) × Io(Reg1) + Vdropout(Reg2) × Io(Reg2) not to exceed Pd=380mW.
1/4
REV. B
2/4
○ELECTRICAL CHARACTERISTICS(Unless otherwise specified, Ta=25℃, VCC=16.5V, VEE=-10V, Set REG1=15V, Set REG2=-7.5V)
Parameter
Limits
Symbol
Unit
MIN Typ MAX
Conditions
【Bias current】
Bias Current (VCC)
ICC - 500 850 μA Io1=0mA
Bias Current (VEE)
IEE - 150 250 μA Io2=0mA
【STB】
STB OFF Voltage
STBOFF
0
- 0.6 V Io1,2=0mA
STB ON Voltage
STBON 1.6 - 3.5 V Io1,2=0mA
STB OFF Bias Current (VEE)
IOFF
-
130
- μA Io1,2=0mA
STB ON Input Current
Iin 10 30 60 μA VSTB=2V, Io1,2=0mA
【Discharge block】
Discharge Current
Idis
150
300
550 μA
【REG1】
CTL1 Voltage
Vctl1 1.372 1.400 1.428 V Io1=10mA
Dropout Voltage 1
ΔVd1
-
0.25 0.35
V Vcc=14.2V, Io1=25mA
Peak Output Current 1
Io1 25 - - mA
Load Regulation 1
Vload1 - 100 - mV Io1=0~25mA
Short – Circuit Output Current 1
Ishort1 - 50 - mA Vo1=0V
Ripple Rejection 1
R.R.1
-
50
- dB f=120Hz, ein=1Vrms, Io1=2mA
Temperature Coefficient of Output Voltage 1 ※ Tcvo1
- ±0.02 - %/℃ Io1=1mA, Tj=0~125℃
【REG2】
CTL2 Voltage
Vctl1 -1.275 -1.250 -1.225 V Io2=10mA
Dropout Voltage2
ΔVd2
-
0.35 0.45
V VEE=-7.1V, Io2=50mA
Peak Output Current2
Io2 50 - - mA
Load Regulation2
Vload2 - 100 - mV Io2=0~50mA
Short – Circuit Output Current 2
Ishort2 - 120 - mA Vo2=0V
Ripple Rejection2
R.R.2
-
50
- dB f=120Hz, ein=1Vrms, Io2=2mA
Temperature Coefficient of Output Voltage 2 ※ Tcvo2
- ±0.02 - %/℃ Io2=1mA, Tj=0~125℃
◎ Discharge time
t=(Reg2×Co)/Idis [s]
(VEE=-10V)
Co:Reg2 Output capacitor(μF)
※ Design Guarantee (Shipment inspection is not done on all products.)
This product is not designed for protection against radio active rays.
○PHYSICAL DIMENSIONS・MARKING
Part No.
3985
Lot No.
SSOP-B8 (UNIT:mm)
REV. B
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