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BD3985FV Dataheets PDF



Part Number BD3985FV
Manufacturers Rohm
Logo Rohm
Description Positive and Negative Variable Linear Regulator
Datasheet BD3985FV DatasheetBD3985FV Datasheet (PDF)

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 Voltag.

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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 ○BLOCK DIAGRAM VCC 2 STB 6 BandGap TSD OCP Discharge Block VEE 4 ○PIN No.・PIN NAME VCC + 1 REG1 8 CTL1 7 GND.


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