BA178M!!T / BA178M!!FP series Regulator ICs Standard 78M series, 3-pin regulator BA178M!! !!T !!FP !! / BA178M!! !! series The BA178M!!T and BA178M!!FP series are 3-pin, 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 0.5A 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 TO-220FP 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, 24 V) "Product codes Output voltage (V) Product No. Output voltage (V) Product No. 5 BA178M05T / FP 12 BA178M12T / FP 6 BA178M06T / FP 15 BA178M15T / FP 7 BA178M07T / FP 18 BA178M18T / FP 8 BA178M08T / FP 20 BA178M20T / FP 9 BA178M09T / FP 24 BA178M24T / FP 10 BA178M10T / FP − − BA178M!!T / BA178M!!FP series Regulator ICs "Internal circuit configuration diagram (1) INPUT R4 R10 R8 R9 R13 Q8 Q9 Q12 D2 Q16 Q15 R5 Q13 R21 R12 R17 Q10 Q17 R11 (3) OUTPUT Q6 R6 Q5 R15 R2 R1 R16 C1 R20 Q11 D1 Q7 Q18 Q4 Q2 Q14 Q1 Q3 R19 R14 R7 R22 R10 R3 D3 (2) COMMON "Absolute maximum ratings (Ta=25°C) ^Common specifications for BA178M!!T / FP seriesp Parameter Symbol Limits Unit VIN 35 V Applied voltage TO220FP Power dissipation 2.0 ∗ Pd 1.0 ∗ TO252−3 W Operating temperature Topr −40~+85 °C Storage temperature Tstg −55~+150 °C ∗ Reduced by 16 mW (TO220FP) and 8 mW (TO252-3) for each increase in Ta of 1°C over 25°C (without heat sink). "Recommended operating conditions (Ta=25°C) BA178M06T / FP BA178M05T / FP Parameter Symbol Min. Typ. Max. Unit Symbol Min. Typ. Max. Input voltage VIN 7.5 − 20 V Input voltage VIN 8.5 − 21 V IO − − A Output current IO − − 0.5 A Unit Output current 0.5 Parameter Unit BA178M08T / FP BA178M07T / FP Symbol Min. Typ. Max. Unit Symbol Min. Typ. Max. Input voltage VIN 9.5 − 22 V Input voltage VIN 10.5 − 23 V Output current IO − − 0.5 A Output current IO − − 0.5 A Symbol Min. Typ. Max. Unit Parameter BA178M10T / FP BA178M09T / FP Parameter Parameter Symbol Min. Input voltage VIN 11.5 Output current IO − Typ. Parameter Max. Unit − 24 V Input voltage VIN 12.5 − 25 V − 0.5 A Output current IO − − 0.5 A BA178M!!T / BA178M!!FP series Regulator ICs BA178M15T / FP BA178M12T / FP Parameter Symbol Min. Typ. Max. Unit Symbol Min. Typ. Max. Unit Input voltage VIN 15 − 27 V Input voltage VIN 17.5 − 30 V Output current IO − − 0.5 A Output current IO − − 0.5 A Parameter BA178M18T / FP Parameter BA178M20T / FP Symbol Min. Typ. Max. Unit Symbol Min. Typ. Max. Unit Input voltage VIN 21 − 33 V Input voltage VIN 23 − 33 V Output current IO − − 0.5 A Output current IO − − 0.5 A Parameter BA178M24T / FP Symbol Min. Typ. Max. Unit Input voltage Parameter VIN 27 − 33 V Output current IO − − 0.5 A "Electrical characteristics <BA178M05T / FP individual specifications> (unless otherwise noted, Ta=25°C, VIN=10V, IO=350mA) Parameter Symbol Min. Typ. Max. Unit Conditions Measurement circuit Output voltage 1 VO1 4.8 5.0 5.2 V IO=350mA Fig.1 Output voltage 2 VO2 4.75 − 5.25 V VIN=7.5~20V, IO=5~350mA Fig.1 Input stability 1 Reg.I1 − 3 100 mV VIN=7~25V, IO=200mA Fig.1 Input stability 2 Reg.I2 − 1 50 mV VIN=8~12V, IO=200mA Fig.1 R.R. 62 78 − dB eIN=1Vrms, f=120Hz, IO=100mA Fig.2 Load regulation 1 Reg.L1 − 20 100 mV IO=5~500mA Fig.1 Load regulation 2 Reg.L2 − 10 50 mV IO=5~200mA Fig.1 Ripple rejection ratio TCVO − −1.0 − Output noise voltage Vn − 40 − Minimum I/O voltage differential Vd − 2.0 Bias current Ib − 4.5 Bias current change 1 Ib1 − − 0.5 Bias current change 2 Ib2 − − 0.8 Peak output current IO−P − 875 Output short-circuit current IOS − 0.4 Temperature coefficient of output voltage mV/°C IO=5mA, Tj=0~125°C Fig.1 µV f=10Hz~100kHz − V IO=500mA Fig.4 6.0 mA IO=0mA Fig.5 mA IO=5~350mA Fig.5 mA VIN=8~25V, IO=200mA Fig.5 − mA Tj=25°C Fig.1 − A VIN=25V Fig.6 Fig.3 BA178M!!T / BA178M!!FP series Regulator ICs <BA178M06T / FP individual specifications> (unless otherwise noted, Ta=25°C, VIN=11V, IO=350mA) Parameter Unit Conditions Measurement circuit Symbol Min. Typ. Max. Output voltage 1 VO1 5.75 6.0 6.25 V IO=350mA Fig.1 Output voltage 2 VO2 5.7 − 6.3 V VIN=8.5~21V, IO=5~350mA Fig.1 Input stability 1 Reg.I1 − 3 100 mV VIN=8~25V, IO=200mA Fig.1 Input stability 2 Reg.I2 − 1 50 mV VIN=9~25V, IO=200mA Fig.1 R.R. 60 74 − dB eIN=1Vrms, f=120Hz, IO=100mA Fig.2 Load regulation 1 Reg.L1 − 20 120 mV IO=5~500mA Fig.1 Load regulation 2 Reg.L2 − 10 60 mV IO=5~200mA Fig.1 TCVO − −0.5 − mV/°C IO=5mA, Tj=0~125°C Fig.1 Output noise voltage Vn − 60 − Minimum I/O voltage differential Vd − 2.0 Bias current Ib − 4.5 Bias current change 1 Ib1 − − Bias current change 2 Ib2 − − Peak output current IO−P − Output short-circuit current IOS − Ripple rejection ratio Temperature coefficient of output voltage µV f=10Hz~100kHz Fig.3 − V IO=500mA Fig.4 6.0 mA IO=0mA Fig.5 0.5 mA IO=5~350mA Fig.5 0.8 mA VIN=9~25V, IO=200mA Fig.5 875 − mA Tj=25°C Fig.1 0.4 − A VIN=25V Fig.6 <BA178M07T / FP individual specifications> (unless otherwise noted, Ta=25°C, VIN=13V, IO=350mA) Parameter Output voltage 1 Symbol Min. Typ. Max. Unit VO1 6.7 7.0 7.3 V Conditions Measurement circuit IO=350mA Fig.1 VO2 6.65 − 7.35 V VIN=9.5~22V, IO=5~350mA Fig.1 Input stability 1 Reg.I1 − 4 100 mV VIN=9~25V, IO=200mA Fig.1 Input stability 2 Reg.I2 − 1 50 mV VIN=10~25V, IO=200mA Fig.1 R.R. 57 71 − dB eIN=1Vrms, f=120Hz, IO=100mA Fig.2 Load regulation 1 Reg.L1 − 20 140 mV IO=5~500mA Fig.1 Load regulation 2 Reg.L2 − 10 70 mV IO=5~200mA Fig.1 Output voltage 2 Ripple rejection ratio TCVO − −0.5 − mV/°C IO=5mA, Tj=0~125°C Fig.1 Output noise voltage Vn − 70 − µV f=10Hz~100kHz Fig.3 Minimum I/O voltage differential Vd − 2.0 − V IO=500mA Fig.4 Bias current Ib − 4.5 6.0 mA IO=0mA Fig.5 Bias current change 1 Ib1 − − 0.5 mA IO=5~350mA Fig.5 Temperature coefficient of output voltage Ib2 − − 0.8 mA VIN=10~25V, IO=200mA Fig.5 Peak output current IO−P − 875 − mA Tj=25°C Fig.1 Output short-circuit current IOS − 0.4 − A VIN=25V Fig.6 Bias current change 2 BA178M!!T / BA178M!!FP series Regulator ICs <BA178M08T / FP individual specifications> (unless otherwise noted, Ta=25°C, VIN=14V, IO=350mA) Parameter Conditions Measurement circuit Symbol Min. Typ. Max. Unit Output voltage 1 VO1 7.7 8.0 8.3 V IO=350mA Fig.1 Output voltage 2 VO2 7.6 − 8.4 V VIN=10.5~23V, IO=5~350mA Fig.1 Input stability 1 Reg.I1 − 4 100 mV VIN=10.5~25V, IO=200mA Fig.1 Input stability 2 Reg.I2 − 1 50 mV VIN=11~12V, IO=200mA Fig.1 R.R. 56 69 − dB eIN=1Vrms, f=120Hz, IO=100mA Fig.2 Load regulation 1 Reg.L1 − 20 160 mV IO=5~500mA Fig.1 Load regulation 2 Reg.L2 − 10 80 mV IO=5~200mA Fig.1 TCVO − −0.5 − mV/°C IO=5mA, Tj=0~125°C Fig.1 Output noise voltage Vn − 80 − Minimum I/O voltage differential Vd − 2.0 Bias current Ib − 4.5 Bias current change 1 Ib1 − − 0.5 Bias current change 2 Ib2 − − 0.8 Peak output current IO−P − 875 − Output short-circuit current IOS − 0.4 − Ripple rejection ratio Temperature coefficient of output voltage µV f=10Hz~100kHz Fig.3 − V IO=500mA Fig.4 6.0 mA IO=0mA Fig.5 mA IO=5~350mA Fig.5 mA VIN=10.5~25V, IO=200mA Fig.5 mA Tj=25°C Fig.1 A VIN=25V Fig.6 <BA178M09T / FP individual specifications> (unless otherwise noted, Ta=25°C, VIN=15V, IO=350mA) Parameter Symbol Min. Typ. Max. Unit Conditions Measurement circuit Output voltage 1 VO1 8.6 9.0 9.4 V IO=350mA Fig.1 Output voltage 2 VO2 8.55 − 9.45 V VIN=11.5~24V, IO=5~350mA Fig.1 Input stability 1 Reg.I1 − 4 100 mV VIN=11.5~26V, IO=200mA Fig.1 Input stability 2 Reg.I2 − 2 50 mV VIN=12~25V, IO=200mA Fig.1 R.R. 56 67 − dB eIN=1Vrms, f=120Hz, IO=100mA Fig.2 Load regulation 1 Reg.L1 − 20 180 mV IO=5~500mA Fig.1 Load regulation 2 Reg.L2 − 10 90 mV IO=5~200mA Fig.1 mV/°C IO=5mA, Tj=0~125°C Fig.1 Ripple rejection ratio TCVO − −0.5 − Output noise voltage Vn − 90 − Minimum I/O voltage differential Vd − 2.0 Bias current Ib − 4.5 Bias current change 1 Ib1 − − 0.5 Bias current change 2 Ib2 − − 0.8 Peak output current IO−P − 875 Output short-circuit current IOS − 0.17 Temperature coefficient of output voltage µV f=10Hz~100kHz Fig.3 − V IO=500mA Fig.4 6.0 mA IO=0mA Fig.5 mA IO=5~350mA Fig.5 mA VIN=12~25V, IO=200mA Fig.5 − mA Tj=25°C Fig.1 − A VIN=30V Fig.6 BA178M!!T / BA178M!!FP series Regulator ICs <BA178M10T / FP individual specifications> (unless otherwise noted, Ta=25°C, VIN=16V, IO=350mA) Parameter Conditions Measurement circuit Symbol Min. Typ. Max. Unit Output voltage 1 VO1 9.6 10.0 10.4 V IO=350mA Fig.1 Output voltage 2 VO2 9.5 − 10.5 V VIN=12.5~25V, IO=5~350mA Fig.1 Input stability 1 Reg.I1 − 5 100 mV VIN=12.5~28V, IO=200mA Fig.1 Input stability 2 Reg.I2 − 2 50 mV VIN=14~26V, IO=200mA Fig.1 R.R. 56 66 − dB eIN=1Vrms, f=120Hz, IO=100mA Fig.2 Load regulation 1 Reg.L1 − 20 200 mV IO=5~500mA Fig.1 Load regulation 2 Reg.L2 − 10 100 mV IO=5~200mA Fig.1 TCVO − −0.5 − mV/°C IO=5mA, Tj=0~125°C Fig.1 Output noise voltage Vn − 100 − µV f=10Hz~100kHz Fig.3 Minimum I/O voltage differential Vd − 2.0 − V IO=500mA Fig.4 Bias current Ib − 4.5 6.0 mA IO=0mA Fig.5 Bias current change 1 Ib1 − − 0.5 mA IO=5~350mA Fig.5 Bias current change 2 Ib2 − − 0.8 mA VIN=13~25V, IO=200mA Fig.5 Peak output current IO−P − 875 − mA Tj=25°C Fig.1 Output short-circuit current IOS − 0.17 − A VIN=30V Fig.6 Ripple rejection ratio Temperature coefficient of output voltage <BA178M12T / FP individual specifications> (unless otherwise noted, Ta=25°C, VIN=19V, IO=350mA) Parameter Conditions Measurement circuit Symbol Min. Typ. Max. Unit Output voltage 1 VO1 11.5 12.0 12.5 V IO=350mA Fig.1 Output voltage 2 VO2 11.4 − 12.6 V VIN=15~27V, IO=5~350mA Fig.1 Input stability 1 Reg.I1 − 5 100 mV VIN=14.5~30V, IO=200mA Fig.1 Input stability 2 Reg.I2 − 3 50 mV VIN=16~30V, IO=200mA Fig.1 R.R. 55 63 − dB eIN=1Vrms, f=120Hz, IO=100mA Fig.2 Load regulation 1 Reg.L1 − 20 240 mV IO=5~500mA Fig.1 Load regulation 2 Reg.L2 − 10 120 mV IO=5~200mA Fig.1 mV/°C IO=5mA, Tj=0~125°C Fig.1 Ripple rejection ratio TCVO − −0.5 − Output noise voltage Vn − 110 − Minimum I/O voltage differential Vd − 2.0 − V Bias current Ib − 4.5 6.0 mA Bias current change 1 Ib1 − − 0.5 mA IO=5~350mA Fig.5 Bias current change 2 Ib2 − − 0.8 mA VIN=14.5~30V, IO=200mA Fig.5 Peak output current IO−P − 875 − mA Tj=25°C Fig.1 Output short-circuit current IOS − 0.17 − A VIN=30V Fig.6 Temperature coefficient of output voltage µV f=10Hz~100kHz Fig.3 IO=500mA Fig.4 IO=0mA Fig.5 BA178M!!T / BA178M!!FP series Regulator ICs <BA178M15T / FP individual specifications> (unless otherwise noted, Ta=25°C, VIN=23V, IO=350mA) Parameter Output voltage 1 Conditions Measurement circuit Symbol Min. Typ. Max. Unit VO1 14.4 15.0 15.6 V IO=350mA Fig.1 VIN=17.5~30V, IO=5~350mA Fig.1 VO2 14.25 − 15.75 V Input stability 1 Reg.I1 − 6 100 mV VIN=17.5~30V, IO=200mA Fig.1 Input stability 2 Reg.I2 − 3 50 mV VIN=20~30V, IO=200mA Fig.1 Output voltage 2 R.R. 54 60 − dB eIN=1Vrms, f=120Hz, IO=100mA Fig.2 Load regulation 1 Reg.L1 − 20 300 mV IO=5~500mA Fig.1 Load regulation 2 Reg.L2 − 10 150 mV IO=5~200mA Fig.1 TCVO − −0.6 − mV/°C IO=5mA, Tj=0~125°C Fig.1 Output noise voltage Vn − 130 − Minimum I/O voltage differential Vd − 2.0 − Ripple rejection ratio Temperature coefficient of output voltage µV f=10Hz~100kHz Fig.3 V IO=500mA Fig.4 Fig.5 Ib − 4.5 6.0 mA IO=0mA Bias current change 1 Ib1 − − 0.5 mA IO=5~350mA Fig.5 Bias current change 2 Ib2 − − 0.8 mA VIN=17.5~30V, IO=200mA Fig.5 Peak output current IO−P − 875 − mA Tj=25°C Fig.1 Output short-circuit current IOS − 0.17 − A VIN=30V Fig.6 Bias current <BA178M18T / FP individual specifications> (unless otherwise noted, Ta=25°C, VIN=27V, IO=350mA) Parameter Conditions Measurement circuit Symbol Min. Typ. Max. Unit Output voltage 1 VO1 17.3 18.0 18.7 V IO=350mA Fig.1 Output voltage 2 VO2 17.1 − 18.9 V VIN=21~33V, IO=5~350mA Fig.1 Input stability 1 Reg.I1 − 7 100 mV VIN=21~33V, IO=200mA Fig.1 Input stability 2 Reg.I2 − 3 50 mV VIN=24~33V, IO=200mA Fig.1 R.R. 53 58 − dB eIN=1Vrms, f=120Hz, IO=100mA Fig.2 Load regulation 1 Reg.L1 − 20 360 mV IO=5~500mA Fig.1 Load regulation 2 Reg.L2 − 10 180 mV IO=5~200mA Fig.1 mV/°C IO=5mA, Tj=0~125°C Fig.1 Ripple rejection ratio TCVO − −0.6 − Output noise voltage Vn − 140 − Minimum I/O voltage differential Vd − 2.0 − V Bias current Ib − 4.5 6.0 mA Bias current change 1 Ib1 − − 0.5 mA IO=5~350mA Fig.5 Bias current change 2 Ib2 − − 0.8 mA VIN=21~33V, IO=200mA Fig.5 Peak output current IO − P − 875 − mA Tj=25°C Fig.1 Output short-circuit current IOS − 0.17 − A VIN=30V Fig.6 Temperature coefficient of output voltage µV f=10Hz~100kHz Fig.3 IO=500mA Fig.4 IO=0mA Fig.5 BA178M!!T / BA178M!!FP series Regulator ICs <BA178M20T / FP individual specifications> (unless otherwise noted, Ta=25°C, VIN=29V, IO=350mA) Parameter Max. Unit Conditions Measurement circuit Symbol Min. Typ. Output voltage 1 VO1 19.2 20.0 20.8 V IO=350mA Fig.1 Output voltage 2 VO2 19.0 − 21.0 V VIN=23~33V, IO=5~350mA Fig.1 Input stability 1 Reg.I1 − 8 100 mV VIN=23~33V, IO=200mA Fig.1 Input stability 2 Reg.I2 − 4 50 mV VIN=24~33V, IO=200mA Fig.1 R.R. 53 58 − dB eIN=1Vrms, f=120Hz, IO=100mA Fig.2 Load regulation 1 Reg.L1 − 20 400 mV IO=5~500mA Fig.1 Load regulation 2 Reg.L2 − 10 200 mV IO=5~200mA Fig.1 TCVO − −0.7 − mV/°C IO=5mA, Tj=0~125°C Fig.1 Output noise voltage Vn − 150 − Mninimum I/O voltage differential Vd − 2.0 Bias current Ib − 4.5 Bias current change 1 Ib1 − − Bias current change 2 Ib2 − − Peak output current IO−P − Output short-circuit current IOS − Ripple rejection ratio Temperature coefficient of output voltage µV f=10Hz~100kHz Fig.3 − V IO=500mA Fig.4 6.0 mA IO=0mA Fig.5 0.5 mA IO=5~350mA Fig.5 0.8 mA VIN=23~33V, IO=200mA Fig.5 875 − mA Tj=25°C Fig.1 0.17 − A VIN=30V Fig.6 <BA178M24T / FP individual specifications> (unless otherwise noted, Ta=25°C, VIN=33V, IO=350mA) Parameter Output voltage 1 Conditions Measurement circuit Symbol Min. Typ. Max. Unit VO1 23.0 24.0 25.0 V IO=350mA Fig.1 VO2 22.8 − 25.2 V VIN=27~33V, IO=5~350mA Fig.1 Input stability 1 Reg.I1 − 10 100 mV VIN=27~33V, IO=200mA Fig.1 Input stability 2 Reg.I2 − 5 50 mV VIN=28~33V, IO=200mA Fig.1 R.R. 50 55 − dB eIN=1Vrms, f=120Hz, IO=100mA Fig.2 Load regulation 1 Reg.L1 − 20 480 mV IO=5~500mA Fig.1 Load regulation 2 Reg.L2 − 10 240 mV IO=5~200mA Fig.1 TCVO − −0.7 − mV/°C IO=5mA, Tj=0~125°C Fig.1 Output noise voltage Vn − 170 − µV f=10Hz~100kHz Fig.3 Minimum I/O voltage differential Vd − 2.0 − V IO=500mA Fig.4 Bias current Ib − 4.8 6.0 mA IO=0mA Fig.5 Bias current change 1 Ib1 − − 0.5 mA IO=5~350mA Fig.5 Output voltage 2 Ripple rejection ratio Temperature coefficient of output voltage Ib2 − − 0.8 mA VIN=27~33V, IO=200mA Fig.5 Peak output current IO−P − 875 − mA Tj=25°C Fig.1 Output short-circuit current IOS − 0.17 − A VIN=30V Fig.6 Bias current change 2 BA178M!!T / BA178M!!FP series Regulator ICs "Measurement circuits INPUT 0.1µF 0.33µF VIN V VIN OUTPUT 10Ω5W INPUT V IO COMMON OUTPUT 0.1µF 100µF 0.33µF eOUT V COMMON IO eIN=1Vrms f=120Hz Ripple rejection ratioR.R.=20 log Fig. 1 Measurement circuit for output voltage, input stability, load regulation, temperature coefficient of output voltage INPUT OUTPUT VIN BPF IO 10Hz~ 100kHz COMMON eIN eOUT ) Fig. 2 Measurement circuit for ripple rejection ratio 10µF + 0.1 µF 0.33µF ( V INPUT Noise meter OUTPUT 0.33µF 0.1µF VIN V IO COMMON ∆V= 100mV 500mA Fig. 3 Measurement circuit for output noise voltage INPUT INPUT OUTPUT 0.33 µF VIN Fig. 4 Measurement circuit for Minimum I/O voltage differential 0.1 µF OUTPUT 0.33µF V COMMON 0.1µF VIN IO IO A COMMON A Fig. 5 Measurement circuit for bias current and bias current change Fig. 6 Measurement circuit for Fig. 10output short-circuit current "Electrical characteristic curves 25 6 VIN=10V, IOUT=0 BA178M05T 8 6 4 2 (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) (1) 22.0 POWER DISSIPATION : Pd (W) VIN=10V BA178M05T OUTPUT VOLTAGE : VOUT (V) OUTPUT VOLTAGE : VOUT (V) 10 5 4 3 2 1 20 15 (2) 11.0 10 (3) 6.5 5 (4) 2.0 0 0.2 0.4 0.6 0.8 1.0 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 characteristics Fig.9 Thermal derating characteristic (TO220FP) BA178M!!T / BA178M!!FP series Regulator ICs POWER DISSIPATION : Pd (W) 12.5 (1) Infinite heat sink, θj−c=12.5 (°C / W) (2) No heat sink θj−c=125.0 (°C /W) (1) 10.0 10 7.5 5 2.5 (2) 1.0 0 0 25 50 75 100 125 150 AMBIENT TEMPERATURE : Ta (°C) Fig.10 Thermal derating characteristic (TO252−3) "Operation notes (1) Although the circuit examples included in this handbook are highly recommendable for general use, you should thoroughly familiar yourself with the circuit characteristics as they relate to your own 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 cannot 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 µF 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, the product may be damaged if absolute maximum ratings for voltage or operating temperature are exceeded. If 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. BA178M!!T / BA178M!!FP series Regulator ICs "External dimensions (Units : mm) BA178MOOFP series 7.0 +0.3 −0.1 2.8 +0.2 −0.1 φ3.1±0.1 6.5±0.2 5.0 +0.2 −0.1 (2) 0.55 +0.1 −0.05 (1) 1.5 2.5 0.8 0.65 2.3±0.2 0.8 2.54±0.5 0.5±0.1 9.5±0.5 7.0±0.3 1.3 2.54±0.5 2.3±0.2 5.5±0.2 8.0±0.2 12.0±0.2 4.5 +0.3 −0.1 10.0 +0.3 −0.1 5.0±0.2 13.5Min. 17.0 +0.4 −0.2 1.8±0.2 BA178MOOT series 0.65 2.3±0.2 (3) (1) (2) (3) (1) (2) (3) TO220FP 0.5±0.1 (1) INPUT (2) COMMON (3) OUTPUT 2.6±0.5 (1) INPUT (2) COMMON (3) OUTPUT TO252−3