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36 standard 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. applications 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
37 standard ics ba178 t / fp series internal circuit configuration common specifications for ba178 t / fp series absolute maximum ratings (ta = 25 c) recommended operating conditions (ta = 25 c)
38 standard ics ba178 t / fp series electrical characteristics ? ba17805t / fp individual specifications ? (unless otherwise noted, ta = 25 c, v in =10v, io = 500ma)
39 standard ics ba178 t / fp series ? ba17806t / fp individual specifications ? (unless otherwise noted, ta = 25 c, v in =11v, io = 500ma) ? ba17807t / fp individual specifications ? (unless otherwise noted, ta = 25 c, v in = 13v, io = 500ma)
40 standard ics ba178 t / fp series ? ba17808t / fp individual specifications ? (unless otherwise noted, ta = 25 c, v in = 14v, io = 500ma) ? ba17809t / fp individual specifications ? (unless otherwise noted, ta = 25 c, v in = 15v, io = 500ma)
41 standard ics ba178 t / fp series ? ba17810t / fp individual specifications ? (unless otherwise noted, ta = 25 c, v in = 16v, io = 500ma) ? ba17812t / fp individual specifications ? (unless otherwise noted, ta = 25 c, v in = 19v, io = 500ma)
42 standard ics ba178 t / fp series ? ba17815t / fp individual specifications ? (unless otherwise noted, ta = 25 c, v in = 23v, io = 500ma) ? ba17818t / fp individual specifications ? (unless otherwise noted, ta = 25 c, v in = 27v, io = 500ma)
43 standard ics ba178 t / fp series ? ba17820t / fp individual specifications ? (unless otherwise noted, ta = 25 c, v in = 29v, io = 500ma) ? ba17824t / fp individual specifications ? (unless otherwise noted, ta = 25 c, v in = 33v, io = 500ma)
44 standard ics ba178 t / fp series measurement circuits
45 standard ics ba178 t / fp series electrical characteristic curves
46 standard ics ba178 t / fp series operation notes (1) although the circuit examples included in this hand- book 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 dis- sipation. if these ics are used in such 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 perfor- mance of the ic. make sure a sufficient margin is allowed so that the allowable power dissipation value is not ex- ceeded. (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 gn of the ap- plication's input (v in 0.1 m f should be used.) changes in the temperature and other factors can cause the valve of the capacitor to change, and this can cause oscillation. to prevent this, we recommend using a tanta- lum capacitor which has minimal changes in nominal ca- pacitance. also, we recommend adding a bypass capacitor of about 0.33 m f 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 tempera- ture 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 (v in ) and gnd are the opposite of the electric poten- tial 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 dam- aged if absolute maximum ratings for voltage or operat- ing temperature are exceeded. when damage has oc- curred, 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 consid- er using a fuse or some other mechanical safety mea- sure. (8) when used within a strong magnetic field, be aware that there is a slight possibility of malfunction.
external dimensions (units: mm) 47 standard ics ba178 t / fp series

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