www.fairchildsemi.com MC78M05/LM78M05 3-Terminal 0.5A Positive Voltage Regulator Features Description * * * * * The MC78M05/LM78M05 series of three-terminal positive regulators are available in the TO-220/D-PAK package with several fixed output voltages making it useful in a wide range of applications. Output Current up to 0.5A Output Voltages of 5V Thermal Overload Protection Short Circuit Protection Output Transistor Safe Operating Area (SOA)Protection TO-220 (Single Gauge) GND 1 D-PAK GND 1 1. Input 2. GND 3. Output Internal Block Digram INPUT SERIES PASS ELEMENT 1 SOA PROTECTION CURRENT GENERATOR STARTING CIRCUIT REFERENCE VOLTAGE OUTPUT 3 R1 ERROR AMPLIFIER R2 THERMAL PROTECTION GND 2 Rev. 1.0.8 (c)2011 Fairchild Semiconductor Corporation MC78M05/LM78M05 Absolute Maximum Ratings Parameter Symbol Value Unit VI 35 V Thermal Resistance Junction-Case (Note1) TO-220 (Tc = +25C) RJC 2.5 C/W Thermal Resistance Junction-Air (Note1, 2) TO-220 (Ta = +25C) D-PAK (Ta = +25C) RJA 66 92 C/W Operating Junction Temperature Range TOPR 0 ~ +150 C Storage Temperature Range TSTG -65 ~ +150 C Input Voltage (for VO = 5V) Note: 1. Thermal resistance test board Size: 76.2mm * 114.3mm * 1.6mm(1S0P) JEDEC standard: JESD51-3, JESD51-7 2. Assume no ambient airflow Electrical Characteristics (MC78M05/LM78M05) (Refer to the test circuits, 0 < TJ < +125C, IO=350mA, VI=10V, unless otherwise specified, CI = 0.33F, CO=0.1F) Parameter Output Voltage Symbol VO Line Regulation (Note3) VO Load Regulation (Note3) VO Quiescent Current Quiescent Current Change Output Voltage Drift IQ IQ V/T Conditions Min. Typ. Max. TJ = +25C 4.8 5 5.2 IO = 5mA to 350mA VI = 7V to 20V 4.75 5 5.25 VI = 7V to 25V - - 100 VI = 8V to 25V - - 50 IO = 5mA to 0.5A, TJ =+25C - - 100 IO = 5mA to 200mA, TJ =+25 C - - 50 TJ =+25C - 4.0 6.0 IO = 5mA to 350mA - - 0.5 IO = 200mA VI = 8V to 25V - - 0.8 IO = 5mA TJ = 0 to +125C - -0.5 - mV/C IO = 200mA TJ =+25C Unit V mV mV mA mA Output Noise Voltage VN f = 10Hz to 100kHz - 40 - V/Vo Ripple Rejection RR f = 120Hz, IO = 300mA VI = 8V to 18V, TJ =+25 C - 80 - dB Dropout Voltage VD TJ =+25C, IO = 500mA - 2 - V Short Circuit Current ISC TJ =+25C, VI = 35V - 300 - mA Peak Current IPK TJ =+25C - 700 - mA Note: 3. Load and line regulation are specified at constant junction temperature. Change in Vo due to heating effects must be taken into account separately. Pulse testing with low duty is used. 2 MC78M05/LM78M05 Typical Applications 1 VI CI 3 MC78M05 LM78M05 VO 2 CO 0.3F 0.1F Figure 1. Fixed Output Regulator 1 VI CI 3 MC78M05 LM78M05 2 0.33F CO VXX 0.1F IO IO R1 Vxx IO = R1 +IO Figure 2. Constant Current Regulator Notes: 1. To specify an output voltage, substitute voltage value for "XX" 2. Although no output capacitor is needed for stability, it does improve transient response. 3. CI is required if regulator is located an appreciable distance from power Supply filter 1 VI CI MC78M05 LM78M05 2 0.33F IO 3 CO VO VXX R1 0.1F IR1 5IO VO = VXX (1+R2/R1) +IOR2 R2 Figure 3. Circuit for Increasing Output Voltage 3 MC78M05/LM78M05 1 VI MC78M05 LM78M05 3 VO 2 CI CO 0.33F 2 7 6 0.1F LM741 3 10k 4 Figure 4. Adjustable Output Regulator (7 to 30V) 13V < VI < 25V 1 VI MC78M05 LM78M05 3 VO 2 C1 0.33F VXX R4 910 R5 9.1k 6 -7 < -VI < 17V 4 Figure 5. 0.5 to 10V Regulator 4 C2 7 _ 2 LM741 + 3 R3 R1 0.1F 10k VO = Vxx R4 R1 MC78M05/LM78M05 Mechanical Dimensions Package Dimensions in millimeters TO-220 [ SINGLE GAUGE ] 5 MC78M05/LM78M05 Mechanical Dimensions (Continued) Package Dimensions in millimeters D-PAK MIN0.55 0.91 0.10 9.50 0.30 0.50 0.10 0.76 0.10 0.50 0.10 1.02 0.20 2.30TYP [2.300.20] (3.05) (2XR0.25) (0.10) 2.70 0.20 6.10 0.20 9.50 0.30 0.76 0.10 6 (1.00) 6.60 0.20 (5.34) (5.04) (1.50) (0.90) 2.30 0.20 (0.70) 2.30TYP [2.300.20] (0.50) 2.30 0.10 0.89 0.10 MAX0.96 (4.34) 2.70 0.20 0.80 0.20 0.60 0.20 (0.50) 6.10 0.20 5.34 0.30 0.70 0.20 6.60 0.20 MC78M05/LM78M05 Ordering Information Product Number Package Operating Temperature LM78M05CT TO-220 (Single Gauge) 0 ~ +125C Product Number Package Operating Temperature MC78M05CDT D-PAK 0 ~ +125C 7 MC78M05/LM78M05 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: 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 9/8/11 0.0m 001 Stock#DS400020 (c) 2011 Fairchild Semiconductor Corporation