Fairchild Semiconductor MC79M12, MC79M08, MC79M05, MC79M15 Datasheet

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MC79MXX

3-Terminal 0.5A Negative Voltage Regulator

	Features	Description
	• No external components required	The MC79MXX series of 3-Terminal medium current
	• Output current in excess of 0.5A	negative voltage regulators are monolithic integrated circuits
	• Internal thermal overload	designed as fixed voltage regulators. These regulators
	• Internal short circuit current limiting	employ internal current limiting, thermal shutdown and safe
	• Output transistor safe area compensation	area compensation making them essentially indestructible.
	• Output voltages of -5V,-6V,-8V,-12V,-15V,-18Vand -24V
		TO-220

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1. GND 2. Input 3. Output

Schematic Diagram

Rev. 1.0.0

©2001 Fairchild Semiconductor Corporation

MC79MXX

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-Cases	Rθ JC	5	° C /W
Thermal Resistance Junction-Air	Rθ JA	65	° C /W
Operating Temperature Range	TOPR	0 ~ +125	° C
Storage Temperature Range	TSTG	-65 ~ +125	° C

Electrical Characteristics (MC79M05)

(Refer to test circuit, 0 ° C ≤ TJ ≤	+125 ° C, lO =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 -25V
Line Regulation (Note1)		∆ VO	TJ =+25° C		VI = -7V to -25V	-	7.0	50	mV
					VI = -8V to -25V	-	2.0	30
Load Regulation (Note1)		∆ VO	IO = 5mA to 500mA			-	30	100	mV
			TJ = +25 ° C
Quiescent Current		IQ	TJ= +25 ° C			-	3.0	6.0	mA
Quiescent Current Change		∆ IQ	IO = 5mA to 350mA			-	-	0.4	mA
			IO = 200mA			-	-	0.4
			VI = -8V to -25V
Output Voltage Drift		∆ Vo/∆ T	IO = 5mA			-	-0.2	-	mV/ ° C
Output Noise Voltage		VN	f = 10Hz, 100KHz			-	40	-	V
			TA = +25 ° C
Ripple Rejection		RR	f = 120Hz			54	60	-	dB
			VJ= -8 to -18V
Dropout Voltage		VD	TJ =+25 ° C, IO = 500mA			-	1.1	-	V
Short Circuit Current		ISC	TJ= +25 ° C, VI = -35V			-	140	-	mA
Peak Current		IPK	TJ= +25 ° C			-	650	-	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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MC79MXX

Electrical Characteristics (MC79M06)

(Refer to test circuit, 0 ° C ≤ TJ ≤ +125 ° C, lO =350mA, VI = -11V,unless otherwise specified)

	Parameter	Symbol		Conditions		Min.	Typ.	Max.	Unit
	Output Voltage	VO	TJ= +25 ° C			- 5.75	- 6.0	- 6.25	V
			IO = 5mA to 350mA
			VI = -8.0V to -25V			- 5.7	- 6.0	- 6.3
	Line Regulation (Note1)	∆ VO	TJ =+25° C		VI = -8V to -25V	-	7.0	60	mV
					VI = -9V to -19V	-	2.0	40
	Load Regulation (Note1)	∆ VO	TJ= +25 ° C		IO = 5.0mA to 500mA	-	30	120	mV
	Quiescent Current	IQ	TJ= +25 ° C			-	3	6	mA
	Quiescent Current Change	∆ IQ	IO = 5mA to 350mA			-	-	0.4	mA
			VI = -8V to -25V			-	-	0.4
	Output Voltage Drift	∆ VO/∆ T	IO = 5mA			-	0.4	-	mV/ ° C
	Output Noise Voltage	VN	f = 10Hz to 100KHz,TA = +25 ° C			-	50	-	V
	Ripple Rejection	RR	f = 120Hz,VI = -9V to -19V			54	60	-	dB
	Dropout Voltage	VD	IO = 500mA, TJ = +25 ° C			-	1.1	-	V
	Short Circuit Current	ISC	VI = -35V, TJ = +25 ° C			-	140	-	mA
	Peak Current	IPK	TJ= +25 ° C			-	650	-	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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MC79MXX

Electrical Characteristics (MC79M08)

(Refer to test circuit, 0 ° C ≤ TJ ≤ +125 ° C, lO =350mA, VI = -14V,unless otherwise specified)

	Parameter	Symbol	Conditions		Min.	Typ.	Max.	Unit
	Output Voltage	VO	TJ= +25 ° C		- 7.7	- 8.0	- 8.3	V
			IO = 5mA to 350mA
			VI = -10.5V to -25V		- 7.6	- 8.0	- 8.4
	Line Regulation (Note1)	∆ VO	TJ =+25° C	VI = -10.5V to -25V	-	7.0	80	mV
				VI = -11V to -21V	-	2.0	50
	Load Regulation (Note1)	∆ VO	TJ= +25 ° C	IO = 5.0mA to 500mA	-	30	160	mV
	Quiescent Current	IQ	TJ= +25 ° C		-	3	6	mA
	Quiescent Current Change	∆ IQ	IO = 5mA to 350mA		-	-	0.4	mA
			VI = -8V to -25V		-	-	0.4
	Output Voltage Drift	∆ VO/∆ T	IO = 5mA		-	-0.6	-	mV/ ° C
	Output Noise Voltage	VN	f = 10Hz to 100KHz,TA = +25 ° C		-	60	-	V
	Ripple Rejection	RR	f = 120Hz,VI = -9V to -19V		54	59	-	dB
	Dropout Voltage	VD	IO = 500mA, TJ = +25 ° C		-	1.1	-	V
	Short Circuit Current	ISC	VI = -35V, TJ = +25 ° C		-	140	-	mA
	Peak Current	IPK	TJ = +25 ° C		-	650	-	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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MC79MXX

Electrical Characteristics (MC79M12)

(Refer to test circuit, 0 ° C ≤ TJ ≤ +125 ° C, lO =350mA, VI = -19V,unless otherwise specified)

	Parameter	Symbol		Conditions		Min.	Typ.	Max.	Unit
	Output Voltage	VO	TJ= +25 ° C			-11.5	-12	-12.5	V
			IO = 5mA to 350mA
			VI = -14.5V to -30V			-11.4	-12	-12.6
	Line Regulation (Note1)	∆ VO	TJ =+25° C		VI = -14.5V to -30V	-	8.0	80	mV
					VI = -15V to -25V	-	3.0	50
	Load Regulation (Note1)	∆ VO	TJ= +25 ° C		IO = 5.0mA to 500mA	-	30	240	mV
	Quiescent Current	IQ	TJ= +25 ° C			-	3	6	mA
	Quiescent Current Change	∆ IQ	IO = 5mA to 350mA			-	-	0.4	mA
			VI = -14.5V to -30V			-	-	0.4
	Output Voltage Drift	∆ VO/∆ T	IO = 5mA			-	-0.8	-	mV/ ° C
	Output Noise Voltage	VN	f = 10Hz to 100KHz,TA =+25 ° C			-	75	-	V
	Ripple Rejection	RR	f = 120Hz,VI = -15V to -25V			54	60	-	dB
	Dropout Voltage	VD	IO = 500mA, TJ = +25 ° C			-	1.1	-	V
	Short Circuit Current	ISC	VI = -35V, TJ = +25 ° C			-	140	-	mA
	Peak Current	IPK	TJ= +25 ° C			-	650	-	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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