SGS Thomson Microelectronics L79L15CD, L79L15ACZ, L79L15ACU, L79L12CD, L79L12ACZ Datasheet

	L79L00
	SERIES
	NEGATIVE VOLTAGE REGULATORS

■OUTPUT CURRENT UP TO 100 mA

■OUTPUT VOLTAGES OF-5; -6; -8; -9; -12; -15V

■THERMAL OVERLOAD PROTECTION

■SHORT CIRCUIT PROTECTION

■NO EXTERNAL COMPONENTS ARE REQUIRED

■AVAILABLEIN EITHER ± 5% (AC) OR ± 10%

(C) SELECTION

DESCRIPTION

The L79L00 series of three-terminal positive regulators employ internal current limiting and thermal shutdown, making them essentially indestructible. If adequate heatsink is provided, they can deliver up to 100 mA output current. They are intended as fixed voltage regulators in a wide range of applications including local or on-card regulation for elimination of noise and distribution problems associated with single-point regulation. In addition, they can be used with power pass elements to make high-current voltage regulators.

The L79L00 series used as Zener diode/resistor combination replacement, offers an effective

SO-8

SOT-89

TO-92

output impedance improvement of typically two orders of magnetude, along with lower quiescent current and lower noise.

BLOCK DIAGRAM

December 1999

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L79L00

ABSOLUTE MAXIMUM RATING

Symbol	Parameter		Value	Unit
Vi	DC Input Voltage	Vo = -5 V to -9 V	-30	V
		Vo = -12 V to -15 V	-35	V
Io	Output Current		100	mA
Ptot	Power Dissipation		Internally limited (*)
Tst g	Storage Temperature Range		- 40 to 150	o C
Top	Operating Junction Temperature Range	For L79L00C, L79L00AC	0 to 125	o C
		For L79L00AB	- 40 to 125	o C

(*) Our SO-8 package used for Voltage Regulators is modified internally to have pins 2, 3, 6 and 7 electrically commoned to the die attach flag. This particular frame decreases the total thermal resistance of the package and increases its ability to dissipate power when an appropriate area of copper on the printed circuit board is available for heatsinking. The external dimensions are the same as for the standard SO-8

THERMAL DATA

Symbol	Parameter		SO-8	TO-92	SOT-89	Unit
Rthjca se	Thermal Resistance Junction-case	Max	20		15	oC/W
Rthjamb	Thermal Resistance Junction-ambient	Max	55 (*)	200		oC/W

(*) Considering 6cm2 of copper Board heat-sink

TEST CIRCUITS

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L79L00

CONNECTION DIAGRAM AND ORDERING NUMBERS (top view)

pin 1	= GND
pin 2	= VIN
pin 3	= VOUT

	SO-8	SOT-89		TO-92
				BOTTOM VIEW
ORDERING NUMBERS
Type	SO-8	TO-92	SOT-89	Output Voltage
L79L05C	L79L05CD	L79L05CZ		-5 V
L79L05AC	L79L05ACD	L79L05ACZ	L79L05ACU	-5 V
L79L05AB	L79L05ABD	L79L05ABZ	L79L05ABU	-5 V
L79L06C	L79L06CD	L79L06CZ		-6 V
L79L06AC	L79L06ACD	L79L06ACZ	L79L06ACU	-6 V
L79L06AB	L79L06ABD	L79L06ABZ	L79L06ABU	-6 V
L79L08C	L79L08CD	L79L08CZ		-8 V
L79L08AC	L79L08ACD	L79L08ACZ	L79L08ACU	-8 V
L79L08AB	L79L08ABD	L79L08ABZ	L79L08ABU	-8 V
L79L09C	L79L09CD	L79L09CZ		-9 V
L79L09AC	L79L09ACD	L79L09ACZ	L79L09ACU	-9 V
L79L09AB	L79L09ABD	L79L09ABZ	L79L09ABU	-9 V
L79L12C	L79L12CD	L79L12CZ		-12 V
L79L12AC	L79L12ACD	L79L12ACZ	L79L12ACU	-12 V
L79L12AB	L79L12ABD	L79L12ABZ	L79L12ABU	-12 V
L79L15C	L79L15CD	L79L15CZ		-15 V
L79L15AC	L79L15ACD	L79L15ACZ		-15 V
L79L15AB	L79L15ABD	L79L15ABZ		-15 V

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L79L00

ELECTRICAL CHARACTERISTICS FOR L79L05 (refer to the test circuits, Tj = 0 to 125 oC, Vi = -10V, Io = 40 mA, Ci = 0.33 μF, Co = 0.1 μF unless otherwise specified)

Symbol	Parameter	Test Conditions		Min.	Typ.	Max.	Unit
Vo	Output Voltage	Tj = 25 oC		-4.6	-5	-5.4	V
Vo	Output Voltage	Io = 1 to 40 mA	Vi = -7 to -20 V	-4.5		-5.5	V
		Io = 1 to 70 mA	Vi = -10 V	-4.5		-5.5	V
Vo	Line Regulation	Vi = -7 to -20 V	Tj = 25 oC			200	mV
		Vi = -8 to -20 V	Tj = 25 oC			150	mV
Vo	Load Regulation	Io = 1 to 100 mA	Tj = 25 oC			60	mV
		Io = 1 to 40 mA	Tj = 25 oC			30	mV
Id	Quiescent Current	Tj = 25 oC				6	mA
		Tj = 125 oC				5.5	mA
Id	Quiescent Current Change	Io = 1 to 40 mA				0.2	mA
Id	Quiescent Current Change	Vi = -8 to -20 V				1.5	mA
eN	Output Noise Voltage	B = 10Hz to 100KHz Tj = 25 oC			40		μV
SVR	Supply Voltage Rejection	Io = 40 mA f = 120 Hz Tj = 25 oC		40	49		dB
		Vi = -8 to -18 V
Vd	Dropout Voltage				1.7		V

ELECTRICAL CHARACTERISTICS FOR L79L06 (refer to the test circuits, Tj = 0 to 125 oC, Vi = -12V, Io = 40 mA, Ci = 0.33 μF, Co = 0.1 μF unless otherwise specified)

Symbol	Parameter	Test Conditions		Min.	Typ.	Max.	Unit
Vo	Output Voltage	Tj = 25 oC		-5.52	-6	-6.48	V
Vo	Output Voltage	Io = 1 to 40 mA	Vi = -8.5 to -20 V	-5.4		-6.6	V
		Io = 1 to 70 mA	Vi = -12 V	-5.4		-6.6	V
Vo	Line Regulation	Vi = -8.5 to -20 V	Tj = 25 oC			200	mV
		Vi = -9 to -20 V	Tj = 25 oC			150	mV
Vo	Load Regulation	Io = 1 to 100 mA	Tj = 25 oC			60	mV
		Io = 1 to 40 mA	Tj = 25 oC			30	mV
Id	Quiescent Current	Tj = 25 oC				6	mA
		Tj = 125 oC				5.5	mA
Id	Quiescent Current Change	Io = 1 to 40 mA				0.2	mA
Id	Quiescent Current Change	Vi = -8 to -20 V				1.5	mA
eN	Output Noise Voltage	B = 10Hz to 100KHz Tj = 25 oC			50		μV
SVR	Supply Voltage Rejection	Io = 40 mA f = 120 Hz Tj = 25 oC		38	46		dB
		Vi = -9 to -20 V
Vd	Dropout Voltage				1.7		V

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