MC78XXE. 3-Terminal 1A Positive Voltage Regulator. Features. Description. Internal Block Digram.

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1 -Terminal A Positive Voltage Regulator Features Current up to A Voltages of 5, V Thermal Overload Protection Short Circuit Protection Transistor Safe Operating Area Protection Description The series of three terminal positive regulators are available in the D-PAK package and with several fixed output voltages, making them useful in a wide range of applications. Each type employs internal current limiting, thermal shut down and safe operating area protection, making it essentially indestructible. If adequate heat sinking is provided, they can deliver over A output current. Although designed primarily as fixed voltage regulators, these devices can be used with external components to obtain adjustable voltages and currents. D-PAK GND.. GND. Internal Block Digram INPUT SERIES PASS ELEMENT OUTPUT CURRENT GENERATOR SOA PROTECTION STARTING CIRCUIT REFERENCE VOLTAGE ERROR AMPLIFIER THERMAL PROTECTION GND Rev Fairchild Semiconductor Corporation

2 Absolute Maximum Ratings Parameter Symbol Value Unit Voltage (for VO = 5V to 8V) VI 5 V Operating Temperature Range TOPR 0 ~ 5 C Storage Temperature Range TSTG -65 ~ 50 C Electrical Characteristics (MC7805E) (Refer to test circuit,0 C < TJ < 5 C, IO = 500mA, VI = 0V, CI= 0. F, CO= 0. F, unless otherwise specified) Parameter Symbol Conditions Voltage VO Line Regulation (Note) Regline TJ = 5 C MC7805E/LM7805E Min. Typ. Max. Unit TJ = 5 C mA Io.0A, PO 5W VI = 7V to 0V V VO = 7V to 5V VI = 8V to V IO = 5.0mA to.5a Load Regulation (Note) Regload TJ = 5 C IO =50mA to mv mA Quiescent Current IQ TJ = 5 C ma Quiescent Current Change IQ IO = 5mA to.0a VI = 7V to 5V ma Voltage Drift (Note) VO/ T IO = 5mA mv/ C Noise Voltage VN f = 0Hz to 00kHz, TA = 5 C V/Vo Ripple Rejection (Note) RR f = 0Hz VO = 8V to 8V db Dropout Voltage VDrop IO = A, TJ =5 C - - V Resistance (Note) ro f = khz m Short Circuit Current ISC VI = 5V, TA =5 C ma Peak Current (Note) IPK TJ = 5 C -. - A mv Note:. Load and line regulation are specified at constant junction temperature. Changes in Vo due to heating effects must be taken into account separately. Pulse testing with low duty is used.. These parameters, although guaranteed, are not 00% tested in production.

3 Electrical Characteristics (MC78E) (Refer to test circuit,0 C < TJ < 5 C, IO = 500mA, VI =9V, CI= 0. F, CO=0. F, unless otherwise specified) Parameter Symbol Conditions Voltage VO Line Regulation (Note) Regline TJ = 5 C MC78E Min. Typ. Max. TJ = 5 C mA IO.0A, PO 5W VI = 4.5V to 7V.4.6 VI = 4.5V to 0V VI = 6V to V IO = 5mA to.5a - 40 Load Regulation (Note) Regload TJ = 5 C mv IO = 50mA to 750mA Quiescent Current IQ TJ = 5 C ma Quiescent Current Change IQ IO = 5mA to.0a VI = 4.5V to 0V ma Voltage Drift (Note) VO/ T IO = 5mA mv/ C Noise Voltage VN f = 0Hz to 00kHz, TA = 5 C V/Vo Ripple Rejection (Note) RR f = 0Hz VI = 5V to 5V db Dropout Voltage VDrop IO = A, TJ = 5 C - - V Resistance (Note) ro f = khz m Short Circuit Current ISC VI = 5V, TA= 5 C ma Peak Current (Note) IPK TJ = 5 C -. - A Unit V mv Note:. Load and line regulation are specified at constant junction temperature. Changes in VO due to heating effects must be taken into account separately. Pulse testing with low duty is used.. These parameters, although guaranteed, are not 00% tested in production.

4 Typical Perfomance Characteristics I Figure. Quiescent Current Figure. Peak Current Figure. Voltage Figure 4. Quiescent Current 4

5 Typical Applications CI 0.uF CO 0.uF Figure 5. DC Parameters RL 70pF VO 0.uF N6 OR EQ. 00 VO 0uS OV Figure 6. Load Regulation 5. 0.uF RL 470uF 0Hz Figure 7. Ripple Rejection CI 0.uF CO 0.uF Figure 8. Fixed Regulator 5

6 0.uF R VXX 0.uF IQ CO IO IO = VXX R IQ RL Figure 9. Constant Current Regulator Notes: () To specify an output voltage. substitute voltage value for "XX." A common ground is required between the input and the voltage. The input voltage must remain typically.0v above the output voltage even during the low point on the input ripple voltage. () CI is required if regulator is located an appreciable distance from power Supply filter. () CO improves stability and transient response. Cl 0.uF IQ 0.uF Co VXX R IRI 5IQ VO = VXX(R/R)IQR R Figure 0. Circuit for Increasing Voltage MC7805E Cl 0.uF 6 _ LM74 4 0k 0.uF Co IRI 5IQ VO = VXX(R/R)IQR Figure. Adjustable Regulator (7 to 0V) 6

7 Q BD56 IQ R = R VBEQ IREG - IQ/BQ IREG 0.uF IO 0.uF IO = IREGBQ(IREG - VBEO/R) Figure. High Current Voltage Regulator RSC Q Q R Q = TIP4 Q = TIP4 VBEQ RSC= ISC 0.uF 0.uF Figure. High Current with Short Circuit Protection VI VO 0.uF 0.uF 4.7K COMMON 6 7 _ LM K COMMON -VIN TIP4 -VO Figure 4. Tracking Voltage Regulator 7

8 0V MC785E 5V 0.uF 0.uF N400.uF uf N400-0V MC795E -5V Figure 5. Split Power Supply ( ±5V-A) 0.uF Figure 6. Negative Voltage Circuit mh Z 0uF 0.uF 000uF 0.5 Figure 7. Switching Regulator 8

9 Mechancal Dimensions Package Dimensions in millimeters D-PAK 9

10 Ordering Information Product Number Voltage Tolerance Package Operating Temperature MC7805ECDTX MC78ECDTX ±4% D-PAK 0 ~ 5 C DISCLAIMER FAIRCHILD SEMICONDUCTOR RESERVES THE RIGHT TO MAKE CHANGES WITHOUT FURTHER NOTICE TO ANY PRODUCTS HEREIN TO IMPROVE 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 CONVEY 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 DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF FAIRCHILD SEMICONDUCTOR CORPORATION. As used herein:. 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, and (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 a significant injury of the user. A critical component in 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. 8/7/ 0.0m 00 Stock#DS Fairchild Semiconductor Corporation

MC78XX/LM78XX. 3-terminal 1A positive voltage regulator. Features. Description. Internal Block Digram.

MC78XX/LM78XX. 3-terminal 1A positive voltage regulator. Features. Description. Internal Block Digram. www.fairchildsemi.com 3-terminal 1A positive voltage regulator Features Current up to 1A Voltages of 5, 6, 8, 9, 10, 11, 12, 15, 18, 24V Thermal Overload Protection Short Circuit Protection Transistor