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Technical content

Features

  • Output Current up to 1A
  • Output V oltages of 5, 12V
  • Thermal Overload Protection
  • Short Circuit Protection
  • Output Transistor Safe Operating Area Protection

Description

The MC78XXE 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, mak- ing it essentially indestructible. If adequate heat sinking is provided, they can deliver over 1A 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 1. Input 2. GND 3. Output GND Internal Block Digram SERIES PASS ELEMENT SOA PROTECTION ERROR AMPLIFIER THERMAL PROTECTION CURRENT GENERATOR REFERENCE VOLTAGESTARTING CIRCUIT OUTPUT GND INPUT MC78XXE 3-Terminal 1A Positive Voltage Regulator

(Refer to test circuit ,0C < TJ < 125C, IO = 500mA, VI = 10V, CI= 0.33F, CO= 0.1F, unless otherwise specified) Note: 1. Load and line regulation are specified at c onstant junction temperature. Changes in Vo due to heating effects must be taken into account separately. Pulse testing with low duty is used. 2. These parameters, although guaranteed, are not 100% tested in production. Parameter Symbol Value Unit Input Voltage (for VO = 5V to 18V) V I 35 V Operating Temperature Range T OPR 0 ~ +125 C Storage Temperature Range T STG -65 ~ +150 C Parameter Symbol Conditions MC7805E/LM7805E Unit Min. Typ. Max. Output Voltage V O 5.0mA ≤ Io ≤ 1.0A, PO ≤ 15W VI = 7V to 20V 4.75 5.0 5.25 V Line Regulation (Note1) Regline T J = +25C VO = 7V to 25V - 4.0 100 mVVI = 8V to 12V - 1.6 50 Load Regulation (Note1) Regload T J = +25C IO = 5.0mA to1.5A - 9 100 mVIO =250mA to 750mA -4 5 0 Quiescent Current I Q TJ = +25C- 5 . 0 8 . 0 m A Quiescent Current Change IQ IO = 5mA to 1.0A - 0.03 0.5 mA VI = 7V to 25V - 0.3 1.3 Output Voltage Drift (Note2) VO/TI O = 5mA - -0.8 - mV/ C Output Noise Voltage V N f = 10Hz to 100kHz, TA = +25C- 4 2 - V/Vo Ripple Rejection (Note2) RR f = 120Hz VO = 8V to 18V 62 73 - dB Dropout Voltage V Drop IO = 1A, TJ =+25C- 2 - V Output Resistance (Note2) r O f = 1kHz - 15 - m  Short Circuit Current I SC VI = 35V, TA =+25C - 230 - mA Peak Current (Note2) I PK TJ = +25C- 2 . 2 - A

(Refer to test circuit ,0C < TJ < 125C, IO = 500mA, VI =19V, CI= 0.33F, CO=0.1F, unless otherwise specified) Note: 1. Load and line regulation are specified at co nstant junction temperature. Changes in VO due to heating effects must be taken into account separately. Pulse testing with low duty is used. 2. These parameters, although guaranteed, are not 100% tested in production. Parameter Symbol Conditions MC7812E Unit Min. Typ. Max. Output Voltage V O TJ = +25C 11.5 12 12.5 V5.0mA IO  1.0A, PO  15W VI = 14.5V to 27V 11.4 12 12.6 Line Regulation (Note1) Regline T J = +25C VI = 14.5V to 30V - 10 240 mVVI = 16V to 22V - 3.0 120 Load Regulation (Note1) Regload T J = +25C IO = 5mA to 1.5A - 11 240 mV IO = 250mA to 750mA - 5.0 120 Quiescent Current I Q TJ = +25C- 5 . 1 8 . 0 m A Quiescent Current Change IQ IO = 5mA to 1.0A - 0.1 0.5 mA VI = 14.5V to 30V - 0.5 1.0 Output Voltage Drift (Note2) VO/TI O = 5mA - -1 - mV/ C Output Noise Voltage V N f = 10Hz to 100kHz, TA = +25C- 7 6 - V/Vo Ripple Rejection (Note2) RR f = 120Hz VI = 15V to 25V 55 71 - dB Dropout Voltage V Drop IO = 1A, TJ = +25C- 2 - V Output Resistance (Note2) r O f = 1kHz - 18 - m  Short Circuit Current I SC VI = 35V, TA= +25C - 230 - mA Peak Current (Note2) I PK TJ = +25C- 2 . 2 - A

8/17/12 0.0m 001 Stock#DS400564  2012 Fairchild Semiconductor Corporation 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: 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, 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. 2. 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. www.fairchildsemi.com 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.

Ordering Information

Product Number Output Voltage Tole rance Package Operating Temperature MC7805ECDTX ±4% D-PAK 0 ~ +125 C MC7812ECDTX