BA17812T

BA178!!T / FP series Regulator ICs Standard 78 series, 3-pin regulator BA178!!T / FP series The BA178!!T and BA178!!FP series are 3pin fixed positive output voltage regulators. These regulators are used to provide a stabilized output voltage from a fluctuating DC input voltage. There are 11 fixed output voltages, as follows : 5V, 6V, 7V, 8V, 9V, 10V, 12V, 15V, 18V, 20V, and 24V. The maximum current capacity is 1A for each of the above voltages. "Application Constant voltage power supply "Features 1) Built-in overcurrent protection circuit and thermal shutdown circuit. 2) Excellent ripple regulation. 3) Available in TO220FP and TO252-3 packages, to meet wide range of applications. 4) Compatible with other manufacturers' regulators. 5) Richly diverse lineup (5V, 6V, 7V, 8V, 9V, 10V, 12V, 15V, 18V, 20V, 24V). "Product codes Output voltage (V) 5 6 7 8 9 10 Product name BA17805T / FP BA17806T / FP BA17807T / FP BA17808T / FP BA17809T / FP BA17810T / FP Output voltage (V) 12 15 18 20 24 − Product name BA17812T / FP BA17815T / FP BA17818T / FP BA17820T / FP BA17824T / FP − BA178!!T / FP series Regulator ICs "Internal circuit configuration diagram (1) INPUT R4 Q12 R10 R8 Q8 Q9 D2 Q16 Q15 R5 Q13 Q10 Q6 R6 Q5 R15 R2 Q7 Q2 Q14 R7 R22 Q1 R14 R18 R3 D3 Q4 Q3 R19 R16 Q11 Q18 R20 R12 Q17 R9 R13 R21 R17 R11 (3) OUTPUT R1 D1 C1 (2) COMMON "Absolute maximum ratings (Ta=25°C) ^Common specifications for BA178!!T / FP seriesp Parameter Applied voltage Power dissipation TO220FP TO252-3 Symbol VIN Pd Topr Tstg Limits 35 2.0 ∗ 1.0 ∗ −40∼+85 −55∼+150 Unit V W ˚C ˚C Operating temperature Storage temperature ∗ Reduced by 16 mW / ˚C (TO220FP) and 8 mW / ˚C (TO252-3) for each increase in Ta of 1˚C over 25˚C (without heat sink). "Recommended operating conditions (Ta=25°C) BA17805T / FP Parameter Input voltage Output current BA17806T / FP Symbol VIN IO Min. 7.5 − Typ. − − Max. 25 1 Unit V A Parameter Input voltage Output current Symbol VIN IO Min. 8.5 − Typ. − − Max. 21 1 Unit V A BA17807T / FP Parameter Input voltage Output current BA17808T / FP Symbol VIN IO Min. 9.5 − Typ. − − Max. 22 1 Unit V A Parameter Input voltage Output current Symbol VIN IO Min. 10.5 − Typ. − − Max. 23 1 Unit V A BA178!!T / FP series Regulator ICs BA17809T / FP Parameter Input voltage Output current BA17810T / FP Symbol VIN IO Min. 11.5 − Typ. − − Max. 26 1 Unit V A Parameter Input voltage Output current Symbol VIN IO Min. 12.5 − Typ. − − Max. 25 1 Unit V A BA17812T / FP Parameter Input voltage Output current BA17815T / FP Symbol VIN IO Min. 15 − Typ. − − Max. 27 1 Unit V A Parameter Input voltage Output current Symbol VIN IO Min. 17.5 − Typ. − − Max. 30 1 Unit V A BA17818T / FP Parameter Input voltage Output current BA17820T / FP Symbol VIN IO Min. 21 − Typ. − − Max. 33 1 Unit V A Parameter Input voltage Output current Symbol VIN IO Min. 23 − Typ. − − Max. 33 1 Unit V A BA17824T / FP Parameter Input voltage Output current Symbol VIN IO Min. 27 − Typ. − − Max. 33 1 Unit V A "Electrical characteristics (unless otherwise noted, Ta=25°C, VIN=10V, IO=500mA) Parameter Output voltage 1 Output voltage 2 Input stability 1 Input stability 2 Ripple rejection ratio Load regulation 1 Load regulation 2 Temperature coefficient of output voltage Output noise voltage Minimum I/O voltage differential Bias current Bias current change 1 Bias current change 2 Peak output current Output short-circuit current Symbol VO1 VO2 Reg.I1 Reg.I2 R.R. Reg.L1 Reg.L2 TCVO Vn Vd Ib Ib1 Ib2 IO-P IOS Min. 4.8 4.75 − − 62 − − − − − − − − − − Typ. 5.0 − 3 1 78 15 5 −1.0 40 2.0 4.5 − − 1.7 0.6 Max. 5.2 5.25 100 50 − 100 50 − − − 8.0 0.5 0.8 − − Unit V V mV mV dB mV mV µV V mA mA mA A A IO=500mA Conditions Measurement circuit Fig.1 Fig.1 Fig.1 Fig.1 Fig.2 Fig.1 Fig.1 Fig.1 Fig.3 Fig.4 Fig.5 Fig.5 Fig.5 Fig.1 Fig.6 VIN=7.5∼20V, IO=5mA∼1A VIN =7∼25V, IO=500mA VIN =8∼12V, IO=500mA eIN =1Vrms, f=120Hz, IO =100mA IO=5mA∼1A IO=250∼750mA f=10Hz∼100kHz IO=1A IO=0mA IO=5mA∼1A VIN=8∼25V Tj=25˚C VIN =25V mV/˚C IO=5mA, Tj =0∼125˚C BA178!!T / FP series Regulator ICs (unless otherwise noted, Ta=25°C, VIN=11V, IO=500mA) Parameter Output voltage 1 Output voltage 2 Input stability 1 Input stability 2 Ripple rejection ratio Load regulation 1 Load regulation 2 Temperature coefficient of output voltage Output noise voltage Minimum I/O voltage differential Bias current Bias current change 1 Bias current change 2 Peak output current Output short-circuit current Symbol VO1 VO2 Reg.I1 Reg.I2 R.R. Reg.L1 Reg.L2 TCVO Vn Vd Ib Ib1 Ib2 IO-P IOS Min. 5.75 5.7 − − 59 − − − − − − − − − − Typ. 6.0 − 4 2 73 16 6 −0.5 60 2.0 4.5 − − 1.7 0.6 Max. 6.25 6.3 120 60 − 120 60 − − − 8.0 0.5 0.8 − − Unit V V mV mV dB mV mV µV V mA mA mA A A IO=500mA Conditions Measurement circuit Fig.1 Fig.1 Fig.1 Fig.1 Fig.2 Fig.1 Fig.1 Fig.1 Fig.3 Fig.4 Fig.5 Fig.5 Fig.5 Fig.1 Fig.6 VIN=8.5∼21V, IO=5mA∼1A VIN=8∼25V, IO=500mA VIN=9∼13V, IO=500mA eIN=1Vrms, f=120Hz, IO=100mA IO=5mA∼1A IO=250∼750mA f=10Hz∼100kHz IO=1A IO=0mA IO=5mA∼1A VIN=8.5∼25V Tj=25˚C VIN=25V mV/˚C IO=5mA, Tj=0∼125˚C (unless otherwise noted, Ta=25°C, VIN=13V, IO=500mA) Parameter Output voltage 1 Output voltage 2 Input stability 1 Input stability 2 Ripple rejection ratio Load regulation 1 Load regulation 2 Temperature coefficient of output voltage Output noise voltage Minimum I/O voltage differential Bias current Bias current change 1 Bias current change 2 Peak output current Output short-circuit current Symbol VO1 VO2 Reg.I1 Reg.I2 R.R. Reg.L1 Reg.L2 TCVO Vn Vd Ib Ib1 Ib2 IO-P IOS Min. 6.7 6.65 − − 57 − − − − − − − − − − Typ. 7.0 − 5 2 69 17 6 −0.5 70 2.0 4.5 − − 1.7 0.6 Max. 7.3 7.35 140 70 − 140 70 − − − 8.5 0.5 0.8 − − Unit V V mV mV dB mV mV µV V mA mA mA A A IO=500mA Conditions Measurement circuit Fig.1 Fig.1 Fig.1 Fig.1 Fig.2 Fig.1 Fig.1 Fig.1 Fig.3 Fig.4 Fig.5 Fig.5 Fig.5 Fig.1 Fig.6 VIN=9.5∼22V, IO=5mA∼1A VIN=9∼25V, IO=500mA VIN=10∼15V, IO=500mA eIN=1Vrms, f=120Hz, IO=100mA IO=5mA∼1A IO=250∼750mA f=10Hz∼100kHz IO=1A IO=0mA IO=5mA∼1A VIN=9.5∼25V Tj=25˚C VIN=25V mV/˚C IO=5mA, Tj=0∼125˚C BA178!!T / FP series Regulator ICs (unless otherwise noted, Ta=25°C, VIN=14V, IO=500mA) Parameter Output voltage 1 Output voltage 2 Input stability 1 Input stability 2 Ripple rejection ratio Load regulation 1 Load regulation 2 Temperature coefficient of output voltage Output noise voltage Minimum I/O voltage differential Bias current Bias current change 1 Bias current change 2 Peak output current Output short-circuit current Symbol Min. VO1 VO2 Reg.I1 Reg.I2 R.R. Reg.L1 Reg.L2 TCVO Vn Vd Ib Ib1 Ib2 IO-P IOS 7.7 7.6 − − 56 − − − − − − − − − − Typ. 8.0 − 5 3 65 19 7 −0.5 80 2.0 4.5 − − 1.7 0.6 Max. 8.3 8.4 160 80 − 160 80 − − − 8.0 0.5 0.8 − − Unit V V mV mV dB mV mV µV V mA mA mA A A IO=500mA Conditions Measurement circuit Fig.1 Fig.1 Fig.1 Fig.1 Fig.2 Fig.1 Fig.1 Fig.1 Fig.3 Fig.4 Fig.5 Fig.5 Fig.5 Fig.1 Fig.6 VIN=10.5∼23V, IO=5mA∼1A VIN=10.5∼25V, IO=500mA VIN=11∼17V, IO=500mA eIN=1Vrms, f=120Hz, IO=100mA IO=5mA∼1A IO=250∼750mA f=10Hz∼100kHz IO=1A IO=0mA IO=5mA∼1A VIN=10.5∼25V Tj=25˚C VIN=25V mV/˚C IO=5mA, Tj=0∼125˚C (unless otherwise noted, Ta=25°C, VIN=15V, IO=500mA) Parameter Output voltage 1 Output voltage 2 Input stability 1 Input stability 2 Ripple rejection ratio Load regulation 1 Load regulation 2 Temperature coefficient of output voltage Output noise voltage Minimum I/O voltage diffrential Bias current Bias current change 1 Bias current change 2 Peak output current Output short-circuit current Symbol VO1 VO2 Reg.I1 Reg.I2 R.R. Reg.L1 Reg.L2 TCVO Vn Vd Ib Ib1 Ib2 IO-P IOS Min. 8.6 8.55 − − 56 − − − − − − − − − − Typ. 9.0 − 6 4 64 20 8 −0.5 90 2.0 4.5 − − 1.7 0.3 Max. 9.4 9.45 180 90 − 180 90 − − − 8.0 0.5 0.8 − − Unit V V mV mV dB mV mV µV V mA mA mA A A IO=500mA Conditions Measurement circuit Fig.1 Fig.1 Fig.1 Fig.1 Fig.2 Fig.1 Fig.1 Fig.1 Fig.3 Fig.4 Fig.5 Fig.5 Fig.5 Fig.1 Fig.6 VIN=11.5∼26V, IO=5mA∼1A VIN=11.5∼26V, IO=500mA VIN=13∼19V, IO =500mA eIN=1Vrms, f=120Hz, IO =100mA IO=5mA∼1A IO=250∼750mA f=10Hz∼100kHz IO=1A IO=0mA IO=5mA∼1A VIN =11.5∼26V Tj=25˚C VIN=30V mV/˚C IO=5mA, T j =0∼125˚C BA178!!T / FP series Regulator ICs (unless otherwise noted, Ta=25°C, VIN=16V, IO=500mA) Parameter Output voltage 1 Output voltage 2 Input stability 1 Input stability 2 Ripple rejection ratio Load regulation 1 Load regulation 2 Temperature coefficient of output voltage Output noise voltage Minimum I/O voltage differential Bias current Bias current change 1 Bias current change 2 Peak output current Output short-circuit current Symbol VO1 VO2 Reg.I1 Reg.I2 R.R. Reg.L1 Reg.L2 TCVO Vn Vd Ib Ib1 Ib2 IO-P IOS Min. 9.6 9.5 − − 55 − − − − − − − − − − Typ. 10.0 − 7 4 64 21 8 −0.5 100 2.0 4.5 − − 1.7 0.3 Max. 10.4 10.5 200 100 − 200 90 − − − 8.0 0.5 0.8 − − Unit V V mV mV dB mV mV µV V mA mA mA A A IO=500mA Conditions Measurement circuit Fig.1 Fig.1 Fig.1 Fig.1 Fig.2 Fig.1 Fig.1 Fig.1 Fig.3 Fig.4 Fig.5 Fig.5 Fig.5 Fig.1 Fig.6 VIN=12.5∼25V, IO=5mA∼1A VIN=12.5∼27V, IO=500mA VIN=14∼20V, IO =500mA eIN=1Vrms, f=120Hz, IO =100mA IO=5mA∼1A IO=250∼750mA f=10Hz∼100kHz IO=1A IO=0mA IO=5mA∼1A VIN=12.5∼27V Tj =25˚C VIN=30V mV/˚C IO=5mA, Tj =0∼125˚C (unless otherwise noted, Ta=25°C, VIN=19V, IO=500mA) Parameter Output voltage 1 Output voltage 2 Input stability 1 Input stability 2 Ripple rejection ratio Load regulation 1 Load regulation 2 Temperature coefficient of output voltage Output noise voltage Minimum I/O voltage differential Bias current Bias current change 1 Bias current change 2 Peak output current Output short-circuit current Symbol VO1 VO2 Reg.I1 Reg.I2 R.R. Reg.L1 Reg.L2 TCVO Vn Vd Ib Ib1 Ib2 IO-P IOS Min. 11.5 11.4 − − 55 − − − − − − − − − − Typ. 12.0 − 8 5 63 23 10 −0.5 110 2.0 4.5 − − 1.7 0.3 Max. 12.5 12.6 240 120 − 240 120 − − − 8.0 0.5 0.8 − − Unit V V mV mV dB mV mV µV V mA mA mA A A IO=500mA Conditions Measurement circuit Fig.1 Fig.1 Fig.1 Fig.1 Fig.2 Fig.1 Fig.1 Fig.1 Fig.3 Fig.4 Fig.5 Fig.5 Fig.5 Fig.1 Fig.6 VIN=15∼27V, IO=5mA∼1A VIN=14.5∼30V, IO=500mA VIN=16∼22V, IO =500mA eIN=1Vrms, f=120Hz, IO =100mA IO=5mA∼1A IO=250∼750mA f=10Hz∼100kHz IO=1A IO=0mA IO=5mA∼1A VIN=14.5∼30V Tj=25˚C VIN=30V mV/˚C IO=5mA, T j =0∼125˚C BA178!!T / FP series Regulator ICs (unless otherwise noted, Ta=25°C, VIN=23V, IO=500mA) Parameter Output voltage 1 Output voltage 2 Input stability 1 Input stability 2 Ripple rejection ratio Load regulation 1 Load regulation 2 Temperature coefficient of output voltage Output noise voltage Minimum I/O voltage differential Bias current Bias current change 1 Bias current change 2 Peak output current Output short-circuit current Symbol VO1 VO2 Reg.I1 Reg.I2 R.R. Reg.L1 Reg.L2 TCVO Vn Vd Ib Ib1 Ib2 IO-P IOS Min. 14.4 14.25 − − 54 − − − − − − − − − − Typ. 15.0 − 9 5 62 27 10 −0.6 125 2.0 4.5 − − 1.7 0.3 Max. 15.6 15.75 300 150 − 300 150 − − − 8.0 0.5 0.8 − − Unit V V mV mV dB mV mV µV V mA mA mA A A IO=500mA Conditions Measurement circuit Fig.1 Fig.1 Fig.1 Fig.1 Fig.2 Fig.1 Fig.1 Fig.1 Fig.3 Fig.4 Fig.5 Fig.5 Fig.5 Fig.1 Fig.6 VIN =17.5∼30V, IO=5mA∼1A VIN=17.5∼30V, IO=500mA VIN=20∼26V, IO =500mA eIN=1Vrms , f=120Hz, IO =100mA IO=5mA∼1A IO=250∼750mA f=10Hz∼100kHz IO=1A IO=0mA IO=5mA∼1A VIN=17.5∼30V Tj =25˚C VIN =30V mV/˚C IO=5mA, Tj =0∼125˚C (unless otherwise noted, Ta=25°C, VIN=27V, IO=500mA) Parameter Output voltage 1 Output voltage 2 Input stability 1 Input stability 2 Ripple rejection ratio Load regulation 1 Load regulation 2 Temperature coefficient of output voltage Output noise voltage Minimum I/O voltage differential Bias current Bias current change 1 Bias current change 2 Peak output current Output short-circuit current Symbol VO1 VO2 Reg.I1 Reg.I2 R.R. Reg.L1 Reg.L2 TCVO Vn Vd Ib Ib1 Ib2 IO-P IOS Min. 17.3 17.1 − − 55 − − − − − − − − − − Typ. 18.0 − 10 5 61 30 12 −0.6 140 2.0 4.5 − − 1.7 0.3 Max. 18.7 18.9 360 180 − 360 180 − − − 8.0 0.5 0.8 − − Unit V V mV mV dB mV mV µV V mA mA mA A A IO=500mA Conditions Measurement circuit Fig.1 Fig.1 Fig.1 Fig.1 Fig.2 Fig.1 Fig.1 Fig.1 Fig.3 Fig.4 Fig.5 Fig.5 Fig.5 Fig.1 Fig.6 VIN =21∼33V, IO =5mA∼1A VIN =21∼33V, IO =500mA VIN=24∼33V, IO =500mA eIN =1Vrms, f=120Hz, IO =100mA IO=5mA∼1A IO=250∼750mA f=10Hz∼100kHz IO=1A IO=0mA IO=5mA∼1A VIN =21∼33V Tj =25˚C VIN =30V mV/˚C IO=5mA, Tj=0∼125˚C BA178!!T / FP series Regulator ICs (unless otherwise noted, Ta=25°C, VIN=29V, IO=500mA) Parameter Output voltage 1 Output voltage 2 Input stability 1 Input stability 2 Ripple rejection ratio Load regulation 1 Load regulation 2 Temperature coefficient of output voltage Output noise voltage Minimum I/O voltage differential Bias current Bias current change 1 Bias current change 2 Peak output current Output short-circuit current Symbol VO1 VO2 Reg.I1 Reg.I2 R.R. Reg.L1 Reg.L2 TCVO Vn Vd Ib Ib1 Ib2 IO-P IOS Min. 19.2 19.0 − − 53 − − − − − − − − − − Typ. 20.0 − 12 7 60 32 14 −0.7 150 2.0 4.5 − − 1.7 0.3 Max. 20.8 21.0 400 200 − 400 200 − − − 8.0 0.5 0.8 − − Unit V V mV mV dB mV mV µV V mA mA mA A A IO=500mA Conditions Measurement circuit Fig.1 Fig.1 Fig.1 Fig.1 Fig.2 Fig.1 Fig.1 Fig.1 Fig.3 Fig.4 Fig.5 Fig.5 Fig.5 Fig.1 Fig.6 VIN=23∼33V, IO =5mA∼1A VIN=23∼33V, IO =500mA VIN=26∼32V, IO =500mA eIN=1Vrms, f=120Hz, IO=100mA IO=5mA∼1A IO=250∼750mA f=10Hz∼100kHz IO=1A IO=0mA IO=5mA∼1A VIN=23∼33V Tj =25˚C VIN=30V mV/˚C IO=5mA, Tj =0∼125˚C (unless otherwise noted, Ta=25°C, VIN=33V, IO=500mA) Parameter Output voltage 1 Output voltage 2 Input stability 1 Input stability 2 Ripple rejection ratio Load regulation 1 Load regulation 2 Temperature coefficient of output voltage Output noise voltage Minimum I/O voltage differential Bias current Bias current change 1 Bias current change 2 Peak output current Output short-circuit current Symbol VO1 VO2 Reg.I1 Reg.I2 R.R. Reg.L1 Reg.L2 TCVO Vn Vd Ib Ib1 Ib2 IO-P IOS Min. 23.0 22.8 − − 50 − − − − − − − − − − Typ. 24.0 − 15 10 58 37 15 −0.7 180 2.0 4.7 − − 1.7 0.3 Max. 25.0 25.2 480 240 − 480 240 − − − 8.0 0.5 0.8 − − Unit V V mV mV dB mV mV µV V mA mA mA A A IO=500mA Conditions Measurement circuit Fig.1 Fig.1 Fig.1 Fig.1 Fig.2 Fig.1 Fig.1 Fig.1 Fig.3 Fig.4 Fig.5 Fig.5 Fig.5 Fig.1 Fig.6 VIN=27∼33V, IO =5mA∼1A VIN=27∼33V, IO =500mA VIN=30∼33V, IO =500mA eIN=1Vrms, f=120Hz, IO =100mA IO=5mA∼1A IO=250∼750mA f=10Hz∼100kHz IO=1A IO=0mA IO=5mA∼1A VIN =27∼33V Tj =25˚C VIN=30V mV/˚C IO=5mA, Tj =0∼125˚C BA178!!T / FP series Regulator ICs "Measurement circuits V ~ INPUT OUTPUT 0.1µF COMMON IO eIN 10Ω5W 0.33µF INPUT 100µF 0.33µF OUTPUT 0.1µF eOUT V ~ IO VIN V VIN COMMON eIN=1Vrms f=120Hz Ripple rejection ratio R.R. = 20 log ( eIN eOUT ) Fig. 1 Measurement circuit for output voltage, input stability,load regulation, temperature coefficient of output voltage Fig. 2 Measurement circuit for ripple rejection rario V 10µF 0.33µF VIN INPUT OUTPUT 0.1 µF COMMON IO + BPF 10Hz∼ 100kHz 0.33µF Noise meter INPUT VIN OUTPUT 0.1µF COMMON IO IA V 100mA ∆V= Fig. 3 Measurement circuit for output noise voltage Fig. 4 Measurement circuit for Minimum I / O voltage differential INPUT 0.33 µF VIN OUTPUT 0.1 µF 0.33 µF IO VIN INPUT OUTPUT 0.1 µF IO A COMMON COMMON A Fig. 5 Measurement circuit for bias current and bias current change Fig. 6 Measurement circuit for Fig. 1 output short-circuit current "Electrical characteristic curves 10 VIN=10V BA17805T OUTPUT VOLTAGE : VOUT (V) 6 25 POWER DISSIPATION : Pd (W) VIN=10V, IOUT=0 BA17805T (1) 22.0 8 OUTPUT VOLTAGE : VOUT (V) 5 4 3 20 6 15 (2) 11.0 (1) Infinite heat sink, θj-c = 5.7 (˚C/W) (2) 100×100×2 (mm3), with Al heat sink (3) 50×50×2 (mm3), with Al heat sink (4) No heat sink θj-a = 62.5 (˚C/W) Note: With Al heat sink, tightening torque = 6 kg/cm and silicon grease as lubricant 4 10 (3) 6.5 2 2 1 0 5 (4) 2.0 0 1.0 1.2 1.4 1.6 1.8 2.0 25 50 75 100 125 150 175 200 0 25 50 75 100 125 150 OUTPUT CURRENT : IOUT (A) JUNCTION TEMPERATURE : Tj (˚C) AMBIENT TEMPERATURE : Ta (˚C) Fig. 7 Current limit characteristics Fig. 8 Thermal cutoff circuit Fig. 2 characteristics Fig.9 Ta - power dissipation characteristics (TO220) BA178!!T / FP series Regulator ICs 12.5 POWER DISSIPATION : Pd (W) (1) 10.0 10 (1) Infinite heat sink, θj-c = 12.5 (˚C/W) (2) No heat sink θj-c = 125.0 (˚C/W) 7.5 5 2.5 (2) 1.0 0 0 25 50 75 100 125 150 AMBIENT TEMPERATURE : Ta (˚C) Fig.10 Ta - power dissipation Fig.3 characteristics (TO252-3) "Operation notes (1) Although the circuit examples included in this handbook are highly recommendable for general use, you should be thoroughly familiar with circuit characteristics as they relate to your own use conditions. If you intend to change the number of external circuits, leave an ample margin, taking into account discrepancies in both static and dynamic characteristics of external parts and Rohm ICs. In addition, please be advised that Rohm cannot provide complete assurance regarding patent rights. (2) Operating power supply voltage When operating within the normal voltage range and within the ambient operating temperature range, most circuit functions are guaranteed. The rated values can not be guaranteed for the electrical characteristics, but there are no sudden changes of the characteristics within these ranges. (3) Power dissipation Heat attenuation characteristics are noted on a separate page and can be used as a guide in judging power dissipation. If these ICs are used in such in a way that the allowable power dissipation level is exceeded, an increase in the chip temperature could cause a reduction in the current capability or could otherwise adversely affect the performance of the IC. Make sure a sufficient margin is allowed so that the allowable power dissipation value is not exceeded. (4) Preventing oscillation in output and using bypass capacitors Always use a capacitor between the output pins and the GND to prevent fluctuation in the output and to prevent oscillation between the output pins and the GND of the application’s input (VIN 0.1µF should be used.) Changes in the temperature and other factors can cause the value of the capacitor to change, and this can cause oscillation. To prevent this, we recommend using a tantalum capacitor which has minimal changes in nominal capacitance. Also, we recommend adding a bypass capacitor of about 0.33µF between the input pin and the GND, as close to the pin as possible. (5) Thermal overload circuit A built-in thermal overload circuit prevents damage from overheating. When the thermal circuit is activated, the various outputs are in the OFF state. When the temperature drops back to a constant level, the circuit is restored. (6) Internal circuits could be damaged if there are modes in which the electric potential of the application’s input (VIN) and GND are the opposite of the electric potential of the various outputs. Use of a diode or other such bypass path is recommended. (7) Although the manufacture of this product includes rigorous quality assurance procedures, it may be be damaged if absolute maximum ratings for voltage or operating temperature are exceeded. When damage has occurred, special modes (such as short circuit mode or open circuit mode) cannot be specified. If it is possible that such special modes may be needed, please consider using a fuse or some other mechanical safety measure. (8) When used within a strong magnetic field, be aware that there is a slight possibility of malfunction. BA178!!T / FP series Regulator ICs "External dimensions (Units : mm) BA178OOT series 10.0 +0.3 −0.1 BA178OOFP series 4.5 φ3.1±0.1 +0.3 −0.1 1.8±0.2 7.0 +0.3 −0.1 2.8 +0.2 −0.1 6.5±0.2 +0.2 5.0 −0.1 (2) 2.3±0.2 0.5±0.1 17.0 +0.4 −0.2 12.0±0.2 5.0±0.2 8.0±0.2 7.0±0.3 5.5±0.2 13.5Min. 0.8 2.54±0.5 (1) (2) (3) 2.54±0.5 0.55 +0.1 −0.05 2.6±0.5 0.65 2.3±0.2 (1) 0.65 2.3±0.2 (3) 0.5±0.1 (1) (2) (3) (1) INPUT (2) COMMON (3) OUTPUT (1) INPUT (2) COMMON (3) OUTPUT TO220FP TO252-3 1.5 2.5 1.3 0.8 9.5±0.5