SGS Thomson Microelectronics L7952CV, L7952CT, L7952CD2T, L7924CV, L7924CT Datasheet

	L7900
	SERIES
	NEGATIVE VOLTAGE REGULATORS

■OUTPUT CURRENT UP TO 1.5 A

■OUTPUT VOLTAGES OF -5; -5.2; -6; -8; -9; -12; -15; -18; -20; -22; -24V

■THERMAL OVERLOAD PROTECTION

■SHORT CIRCUIT PROTECTION

■OUTPUT TRANSITION SOA PROTECTION

DESCRIPTION

The L7900 series of three-terminal negative regulators is available in TO-220, ISOWATT220 TO-3 and D2PAK packages and several fixed output voltages, making it useful in a wide range of applications.These regulators can provide local on-card regulation, eliminating the distribution problems associated with single point regulation; furthermore, having the same voltage option as the L7800 positive standard series, they are particularly suited for split power supplies. In addition, the -5.2V is also available for ECL system. If adequate heat sinking is provided, they can deliver over 1.5A output current. Although designed primarily as fixed voltage regulators, these devices can be used with external components to obtain adjustable voltages and currents.

SCHEMATIC DIAGRAM

1	3
2	1
TO-3	D2PAK

3

2

1

TO-220 ISOWATT220

November 1999

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L7900

ABSOLUTE MAXIMUM RATINGS

Symbol	Parameter	Value		Unit
Vi	DC Input Voltage (for VO = 5 to 18V)	-35		V
	(for VO = 20, 24V)	-40		V
Io	Output Current	Internally	limited
Ptot	Power Dissipation	Internally	limited
Top	Operating Junction Temperature Range	0 to 150		o C
Tst g	Storage Temperature Range	- 65 to	150	o C

THERMAL DATA

Symbol	Parameter		D2PAK	TO-220	ISOWATT220	TO-3	Unit
Rthjca se	Thermal Resistance Junction-case	Max	3	3	4	4	oC/W
Rthjamb	Thermal Resistance Junction-ambient	Max	62.5	50	60	35	oC/W

CONNECTION DIAGRAM AND ORDERING NUMBERS (top view)

TO-220 & ISOWATT 220			D2PAK		TO-3
Type	TO-220	D2PAK (*)	ISOWATT220	TO-3	Output Voltage
L7905C	L7905CV	L7905CD2T	L7905CP	L7905CT	-5V
L7952C	L7952CV	L7952CD2T		L7952CT	-5.2V
L7906C	L7906CV	L7906CD2T	L7906CP	L7906CT	-6V
L7908C	L7908CV	L7908CD2T	L7908CP	L7908CT	-8V
L7912C	L7912CV	L7912CD2T	L7912CP	L7912CT	-12V
L7915C	L7915CV	L7915CD2T	L7915CP	L7915CT	-15V
L7918C	L7918CV	L7918CD2T	L7918CP	L7918CT	-18V
L7920C	L7920CV	L7920CD2T	L7920CP	L7920CT	-20V
L7922C	L7922CV	L7922CD2T		L7922CT	-22V
L7924C	L7924CV	L7924CD2T	L7924CP	L7924CT	-24V

(*) AVAILABLE IN TAPE AND REEL WITH º-TRº SUFFIX

APPLICATION CIRCUIT

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								L7900
ELECTRICAL CHARACTERISTICS FOR L7905C (refer to the test circuits, Tj = 0 to 150 oC,
Vi = -10V, Io = 500 mA, Ci = 2.2 μF, Co = 1 μF unless otherwise specified)
Symbol	Parameter		Test Conditions		Min.	Typ.	Max.	Unit
Vo	Output Voltage	Tj = 25 oC			-4.8	-5	-5.2	V
Vo	Output Voltage	Io = -5 mA to -1 A		Po ≤ 15 W	-4.75	-5	-5.25	V
		Vi = 8 to 20 V
Vo*	Line Regulation	Vi = -7 to -25 V Tj = 25 oC					100	mV
		Vi = -8 to -12 V Tj = 25 oC					50	mV
Vo*	Load Regulation	Io = 5 to 1500 mA		Tj = 25 oC			100	mV
		Io = 250 to 750 mA		Tj = 25 oC			50	mV
Id	Quiescent Current	Tj = 25 oC					3	mA
Id	Quiescent Current Change	Io = 5 to 1000 mA					0.5	mA
Id	Quiescent Current Change	Vi = -8 to -25 V					1.3	mA
Vo	Output Voltage Drift	Io = 5 mA				-0.4		mV/oC
T
eN	Output Noise Voltage	B = 10Hz to 100KHz Tj = 25 oC				100		μV
SVR	Supply Voltage Rejection	Vi = 10 V	f = 120 Hz		54	60		dB
Vd	Dropout Voltage	Io = 1 A	Tj = 25 oC			1.4		V
		VO = 100 mV
Is c	Short Circuit Current					2.1		A
Iscp	Short Circuit Peak Current	Tj = 25 oC				2.5		A
ELECTRICAL CHARACTERISTICS FOR L7952C (refer to the test circuits, Tj = 0 to 150 oC,
Vi = -10V, Io = 500 mA, Ci = 2.2 μF, Co = 1 μF unless otherwise specified)
Symbol	Parameter		Test Conditions		Min.	Typ.	Max.	Unit
Vo	Output Voltage	Tj = 25 oC			-5.0	-5.2	-5.4	V
Vo	Output Voltage	Io = -5 mA to -1 A		Po ≤ 15 W	-4.95	-5.2	-5.45	V
		Vi = -9 to -21 V
Vo*	Line Regulation	Vi = -8 to -25 V Tj = 25 oC					105	mV
		Vi = -9 to -12 V Tj = 25 oC					52	mV
Vo*	Load Regulation	Io = 5 to 1500 mA		Tj = 25 oC			105	mV
		Io = 250 to 750 mA		Tj = 25 oC			52	mV
Id	Quiescent Current	Tj = 25 oC					3	mA
Id	Quiescent Current Change	Io = 5 to 1000 mA					0.5	mA
Id	Quiescent Current Change	Vi = -9 to -25 V					1.3	mA
Vo	Output Voltage Drift	Io = 5 mA				-0.5		mV/oC
T
eN	Output Noise Voltage	B = 10Hz to 100KHz Tj = 25 oC				125		μV
SVR	Supply Voltage Rejection	Vi = 10 V	f = 120 Hz		54	60		dB
Vd	Dropout Voltage	Io = 1 A	Tj = 25 oC			1.4		V
		VO = 100 mV
Is c	Short Circuit Current					2		A
Iscp	Short Circuit Peak Current	Tj = 25 oC				2.5		A

* Load and line regulation are specified at constant junction temperature. Changes in Vo due to heating effects must be taken into account separately. Pulce testing with low duty cycle is used.

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L7900

ELECTRICAL CHARACTERISTICS FOR L7906C (refer to the test circuits, Tj = 0 to 150 oC, Vi = -11V, Io = 500 mA, Ci = 2.2 μF, Co = 1 μF unless otherwise specified)

Symbol	Parameter		Test Conditions		Min.	Typ.	Max.	Unit
Vo	Output Voltage	Tj = 25 oC			-5.75	-6	-6.25	V
Vo	Output Voltage	Io = -5 mA to -1 A		Po ≤ 15 W	-5.7	-6	-6.3	V
		Vi = -9.5 to -21.5 V
Vo*	Line Regulation	Vi = -8.5 to -25 V		Tj = 25 oC			120	mV
		Vi = -9 to -15 V Tj = 25 oC					60	mV
Vo*	Load Regulation	Io = 5 to 1500 mA		Tj = 25 oC			120	mV
		Io = 250 to 750 mA		Tj = 25 oC			60	mV
Id	Quiescent Current	Tj = 25 oC					3	mA
Id	Quiescent Current Change	Io = 5 to 1000 mA					0.5	mA
Id	Quiescent Current Change	Vi = -9.5 to -25 V					1.3	mA
Vo	Output Voltage Drift	Io = 5 mA				-0.6		mV/oC
T
eN	Output Noise Voltage	B = 10Hz to 100KHz Tj = 25 oC				144		μV
SVR	Supply Voltage Rejection	Vi = 10 V	f = 120 Hz		54	60		dB
Vd	Dropout Voltage	Io = 1 A	Tj = 25 oC			1.4		V
		VO = 100 mV
Is c	Short Circuit Current					2		A
Iscp	Short Circuit Peak Current	Tj = 25 oC				2.5		A

ELECTRICAL CHARACTERISTICS FOR L7908C (refer to the test circuits, Tj = 0 to 150 oC, Vi = -14V, Io = 500 mA, Ci = 2.2 μF, Co = 1 μF unless otherwise specified)

Symbol	Parameter		Test Conditions		Min.	Typ.	Max.	Unit
Vo	Output Voltage	Tj = 25 oC			-7.7	-8	-8.3	V
Vo	Output Voltage	Io = -5 mA to -1 A		Po ≤ 15 W	-7.6	-8	-8.4	V
		Vi = -11.5 to -23 V
Vo*	Line Regulation	Vi = -10.5 to -25 V		Tj = 25 oC			160	mV
		Vi = -11 to -17 V Tj = 25 oC					80	mV
Vo*	Load Regulation	Io = 5 to 1500 mA		Tj = 25 oC			160	mV
		Io = 250 to 750 mA		Tj = 25 oC			80	mV
Id	Quiescent Current	Tj = 25 oC					3	mA
Id	Quiescent Current Change	Io = 5 to 1000 mA					0.5	mA
Id	Quiescent Current Change	Vi = -11.5 to -25 V					1.3	mA
Vo	Output Voltage Drift	Io = 5 mA				-0.6		mV/oC
T
eN	Output Noise Voltage	B = 10Hz to 100KHz Tj = 25 oC				175		μV
SVR	Supply Voltage Rejection	Vi = 10 V	f = 120 Hz		54	60		dB
Vd	Dropout Voltage	Io = 1 A	Tj = 25 oC			1.1		V
		VO = 100 mV
Is c	Short Circuit Current					1.5		A
Iscp	Short Circuit Peak Current	Tj = 25 oC				2.5		A

* Load and line regulation are specified at constant junction temperature. Changes in Vo due to heating effects must be taken into account separately. Pulce testing with low duty cycle is used.

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