LOW DROPOUT VOLTAGE REGULATOR FEATURES ORDERING INFORMATION BLOCK DIAGRAM TO-220F-4L

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Spencer Flynn
6 years ago
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1 KA78R The KA78R is a lowdropout voltage regulator suitable for various electronic equipments. It provide constant voltage power source with TO lead full mold package. Dropout voltage of KA78R is below.v in full rated current(1a). This regulator has various function such as peak current protection, thermal shut down, overvoltage protection and output disable function. TOFL FEATURES 1A / Output low dropout voltage regulator TO FulllMold package (PIN) Overcurrent protection, Thermal shutdown Overvoltage protection, Shortcircuit protection With output disable function 1.in ORDERING INFORMATION.o.GND.dis Device Package Operating Temperature KA78R TOFL & ~ 8& BLOCK DIAGRAM in 1 Q1 o THERMAL SHUTDOWN OEROLTAGE PROTECTION BANDGAP REFERENCE R1 SOA PROTECTION dis HIGH / LOW OUTPUT ON / OFF 1. SHORTCIRCUIT PROTECTION R GND Rev. B 1999 Fairchild Semiconductor Corporation

2 KA78R ABSOLUTE MAXIMUM RATINGS Characteristic Symbol alue Unit Remark Input oltage in Disable oltage dis Output Current Io 1. A Power Dissipation 1 Pd1 1. W No Heatsink Power Dissipation Pd 1 W With Heatsink Junction Temperature Tj 1 º C Operating Temperature Topr ~ 8 º C ELECTRICAL CHARACTERISTICS (in=7, Io=.A, Ta=&, unless otherwise specified) Characteristic Symbol Test Condition Min Typ Max Unit Output oltage Load Regulation Line Regulation o Rload Rline < Io < 1A 6 < in < % % Ripple Rejection Ratio RR note1 db Dropout oltage drop Io = 1A. Disable oltage High dish Output Active. Disable oltage Low Disable Bias Current High Disable Bias Current Low Quiescent Current disl IdisH IdisL Iq Output Disabled dis =.7 dis =. Io = A.8. 1 *note1 : These parameters, although guaranteed, are not 1% tested in production.

3 KA78R FIG.1 Output oltage vs. Input oltage 7 FIG. Quiscent Current vs. Input oltage FIG. Output oltage vs. Disable oltage 7 Outout voltage o() 6 1 RL=! RL=ohm Quescent current Iq(mA) 1 RL=! Output voltage o() Input voltage in () 1 Input voltage in () Disable voltage dis () Outout voltage o() FIG. Output oltage vs. Temperature(Tj) TEMPERATURE Tj(&) FIG. Quiscent Current vs. Temperature(Tj) Quescent current Iq(mA) A Junction temperature Tj(&) FIG.6 Dropout oltage vs. Junction Temperature Dropout voltage drop() Io=1A.7A.A Junction temperature Tj( C) FIG.7 Power Dissipation vs. Temperature(Ta) Power dissipation PD(W) TEMPERATURE TJ(&)

4 KA78R TYPICAL APPLICATION FIG.1 APPLICATION CIRCUIT in 1 o GND dis Disable Signal * Ci is required if regulator is located an appreciable distance from power supply filter. * Co improves stability and transient response.(co > 7uF)

5 KA78R < TOFL > MAX 1.MIN. 1 ë.. 1.MIN 1.MAX.6.1 * DIMENSIONS IN MILIMETER.. 1..

6 TRADEMARKS The following are registered and unregistered trademarks Fairchild Semiconductor owns or is authorized to use and is not intended to be an exhaustive list of all such trademarks. DISCLAIMER ACEx CoolFET CROSSOLT E CMOS TM FACT FACT Quiet Series FAST FASTr GTO HiSeC ISOPLANAR MICROWIRE POP PowerTrench QS Quiet Series SuperSOT SuperSOT 6 SuperSOT 8 TinyLogic UHC CX FAIRCHILD SEMICONDUCTOR RESERES THE RIGHT TO MAKE CHANGES WITHOUT FURTHER NOTICE TO ANY PRODUCTS HEREIN TO IMPROE RELIABILITY, FUNCTION OR DESIGN. FAIRCHILD DOES NOT ASSUME ANY LIABILITY ARISING OUT OF THE APPLICATION OR USE OF ANY PRODUCT OR CIRCUIT DESCRIBED HEREIN; NEITHER DOES IT CONEY ANY LICENSE UNDER ITS PATENT RIGHTS, NOR THE RIGHTS OF OTHERS. LIFE SUPPORT POLICY FAIRCHILD S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROAL OF FAIRCHILD SEMICONDUCTOR CORPORATION. As used herein: 1. Life support devices or systems are devices or systems which, (a) are intended for surgical implant into the body, or (b) support or sustain life, or (c) whose failure to perform when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in significant injury to the user. PRODUCT STATUS DEFINITIONS Definition of Terms. A critical component is any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness. Datasheet Identification Product Status Definition Advance Information Preliminary No Identification Needed Formative or In Design First Production Full Production This datasheet contains the design specifications for product development. Specifications may change in any manner without notice. This datasheet contains preliminary data, and supplementary data will be published at a later date. Fairchild Semiconductor reserves the right to make changes at any time without notice in order to improve design. This datasheet contains final specifications. Fairchild Semiconductor reserves the right to make changes at any time without notice in order to improve design. Obsolete Not In Production This datasheet contains specifications on a product that has been discontinued by Fairchild semiconductor. The datasheet is printed for reference information only.

VOLTAGE DETECTOR FEATURES + - TO-92

VOLTAGE DETECTOR FEATURES + - TO-92 X TO-9 The KA7550/70/90/0//6/9/4/45 prevents error of system from supply voltage below normal voltage level at the time the power on and instantaneous power off in systems. FEATURES Detecting against error