Fairchild Semiconductor MC78M24, MC78M05, MC78M15, MC78M08, LM78M05 Datasheet

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MC78MXX/LM78MXX

3-Terminal 0.5A Positive Voltage Regulator

	Features		Description
	• Output Current up to 0.5A		The MC78MXX/LM78MXX series of three-terminal
	• Output Voltages of 5, 6, 8, 12, 15, 18, 24V		positive regulators are available in the TO-220/D-PAK
	•	Thermal Overload Protection	package with several fixed output voltages making it useful
	•	Short Circuit Protection	in a wide range of applications.
	• Output Transistor Safe Operating Area (SOA)Protection
			TO-220	GND

1

D-PAK GND

1

1. Input 2. GND 3. Output

Internal Block Digram
INPUT		SERIES	OUTPUT
1		PASS	3
		ELEMENT
	CURRENT	SOA	R1
	GENERATOR	PROTECTION
STARTING	REFERENCE	ERROR
CIRCUIT	VOLTAGE	AMPLIFIER
			R2
		THERMAL
		PROTECTION
			GND
			2

Rev. 1.0.5

©2002 Fairchild Semiconductor Corporation

MC78MXX/LM78MXX

Absolute Maximum Ratings

	Parameter	Symbol	Value	Unit
	Input Voltage (for VO = 5V to 18V)	VI	35	V
	(for VO = 24V)	VI	40	V
	Thermal Resistance Junction-Case (Note1)	Rθ JC	2.5	° C/W
	TO-220 (Tc = +25° C)
	Thermal Resistance Junction-Air (Note1, 2)
	TO-220 (Ta = +25° C)	Rθ JA	66	° C/W
	D-PAK (Ta = +25° C)		92
	Operating Junction Temperature Range	TOPR	0 ~ +150	° C
	Storage Temperature Range	TSTG	-65 ~ +150	° C

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 < +125° C, IO=350mA, VI=10V, unless otherwise specified, CI = 0.33 F, CO=0.1 F)

	Parameter	Symbol	Conditions			Min.	Typ.	Max.	Unit
	Output Voltage	VO	TJ = +25° C			4.8	5	5.2	V
			IO = 5mA to 350mA			4.75	5	5.25
			VI = 7V to 20V
	Line Regulation (Note3)	∆ VO	IO = 200mA		VI = 7V to 25V	-	-	100	mV
			TJ =+25° C		VI = 8V to 25V	-	-	50
	Load Regulation (Note3)	∆ VO	IO = 5mA to 0.5A, TJ =+25° C			-	-	100	mV
			IO = 5mA to 200mA, TJ =+25 ° C			-	-	50
	Quiescent Current	IQ	TJ =+25° C			-	4.0	6.0	mA
	Quiescent Current Change	∆ IQ	IO = 5mA to 350mA			-	-	0.5	mA
			IO = 200mA			-	-	0.8
			VI = 8V to 25V
	Output Voltage Drift	∆ V/∆ T	IO = 5mA			-	-0.5	-	mV/° C
			TJ = 0 to +125° C
	Output Noise Voltage	VN	f = 10Hz to 100kHz			-	40	-	V/Vo
	Ripple Rejection	RR	f = 120Hz, IO = 300mA			-	80	-	dB
			VI = 8V to 18V, TJ =+25 ° C
	Dropout Voltage	VD	TJ =+25° C, IO = 500mA			-	2	-	V
	Short Circuit Current	ISC	TJ =+25° C, VI = 35V			-	300	-	mA
	Peak Current	IPK	TJ =+25° C			-	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.

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MC78MXX/LM78MXX

Electrical Characteristics (MC78M06) (Continued)

(Refer to the test circuits, 0 < TJ < +125° C, IO=350mA, VI =11V, unless otherwise specified, CI=0.33 F, CO=0.1 F)

	Parameter	Symbol	Conditions			Min.	Typ.	Max.	Unit
	Output Voltage	VO	TJ = +25° C			5.75	6	6.25	V
			IO = 5mA to 350mA			5.7	6	6.3
			VI = 8V to 21V
	Line Regulation (Note1)	∆ VO	IO = 200mA		VI = 8V to 25V	-	-	100	mV
			TJ = +25° C		VI = 9V to 25V	-	-	50
	Load Regulation (Note1)	∆ VO	IO = 5mA to	0.5A, TJ = +25° C		-	-	120	mV
			IO = 5mA to 200mA, TJ = +25° C			-	-	60
	Quiescent Current	IQ	TJ = +25° C			-	4.0	6.0	mA
	Quiescent Current Change	∆ IQ	IO = 5mA to 350mA			-	-	0.5	mA
			IO = 200mA			-	-	0.8
			VI = 9V to 25V
	Output Voltage Drift	∆ V/∆ T	IO = 5mA			-	-0.5	-	mV/° C
			TJ = 0 to +125° C
	Output Noise Voltage	VN	f = 10Hz to 100kHz			-	45	-	V/Vo
	Ripple Rejection	RR	f = 120Hz, IO = 300mA			-	80	-	dB
			VI = 9V to 19V, TJ =+25 ° C
	Dropout Voltage	VD	TJ =+25° C, IO = 500mA			-	2	-	V
	Short Circuit Current	ISC	TJ = +25° C, VI= 35V			-	300	-	mA
	Peak Current	IPK	TJ =+25° C			-	700	-	mA

Note:

1.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.

3

MC78MXX/LM78MXX

Electrical Characteristics (MC78M08) (Continued)

(Refer to the test circuits, 0 < TJ < +125° C, IO=350mA, VI=14V, unless otherwise specified, CI = 0.33µ F, CO=0.1µ F)

	Parameter	Symbol		Conditions		Min.	Typ.	Max.	Unit
	Output Voltage	VO	TJ =+25° C			7.7	8	8.3	V
			IO = 5mA to 350mA			7.6	8	8.4
			VI = 10.5V to 23V
	Line Regulation (Note1)	∆ VO	IO = 200mA		VI = 10.5V to 25V	-	-	100	mV
			TJ =+25° C		VI = 11V to 25V	-	-	50
	Load Regulation (Note1)	∆ VO	IO = 5mA to 0.5A, TJ =+25° C			-	-	160	mV
			IO = 5mA to 200mA, TJ =+25° C			-	-	80
	Quiescent Current	IQ	TJ = +25° C			-	4.0	6.0	mA
	Quiescent Current Change	∆ IQ	IO = 5mA to 350mA			-	-	0.5	mA
			IO = 200mA			-	-	0.8
			VI = 10.5V to 25V
	Output Voltage Drift	RR	IO = 5mA			-	− 0.5	-	mV/° C
			TJ = 0 to +125° C
	Output Noise Voltage	VN	f = 10Hz to 100kHz			-	52	-	V/Vo
	Ripple Rejection	RR	f = 120Hz, IO = 300mA			-	80	-	dB
			VI = 11.5V to 21.5V, TJ =+25 ° C
	Dropout Voltage	VD	TJ = +25° C, IO = 500mA			-	2	-	V
	Short Circuit Current	ISC	TJ = +25° C, VI = 35V			-	300	-	mA
	Peak Current	IPK	TJ = +25° C			-	700	-	mA

Note:

1.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.

4

MC78MXX/LM78MXX

Electrical Characteristics (MC78M12) (Continued)

(Refer to the test circuits, 0 < TJ < +125° C, IO=350mA, VI=19V, unless otherwise specified, CI =0.33 F, CO=0.1 F)

	Parameter	Symbol		Conditions		Min.	Typ.	Max.	Unit
	Output Voltage	VO	TJ = +25° C			11.5	12	12.5	V
			IO = 5mA to 350mA			11.4	12	12.6
			VI = 14.5V to 27V
	Line Regulation (Note1)	∆ VO	IO = 200mA		VI = 14.5V to 30V	-	-	100	mV
			TJ = +25° C		VI = 16V to 30V	-	-	50
	Load Regulation (Note1)	∆ VO	IO = 5mA to 0.5A, TJ = +25° C			-	-	240	mV
			IO = 5mA to 200mA, TJ = +25° C			-	-	120
	Quiescent Current	IQ	TJ =+25° C			-	4.1	6.0	mA
	Quiescent Current Change	∆ IQ	IO = 5mA to 350mA			-	-	0.5	mA
			IO = 200mA			-	-	0.8
			VI = 14.5V to 30V
	Output Voltage Drift	∆ V/∆ T	IO = 5mA			-	-0.5	-	mV/° C
			TJ = 0 to +125° C
	Output Noise Voltage	VN	f = 10Hz to 100kHz			-	75	-	V/Vo
	Ripple Rejection	RR	f = 120Hz, IO = 300mA			-	80	-	dB
			VI = 15V to 25V, TJ =+25 ° C
	Dropout Voltage	VD	TJ =+25° C, IO = 500mA			-	2	-	V
	Short Circuit Current	ISC	TJ = +25° C, VI = 35V			-	300	-	mA
	Peak Current	IPK	TJ = +25° C			-	700	-	mA

Note:

1.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.

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