ST L7800AB User Manual

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L7800AB/AC series

Precision 1A regulators

Feature summary

■Output current in excess of 1A

■Output voltages of 5; 6; 8; 9; 12; 15; 18; 20; 24V

■Thermal overload protection

■Output transition SOA protection

■2% Output voltage tolerance

■Guaranteed in extended temperature range

Description

The L7800A series of three terminal positive regulators is available in TO-220, TO-220FP, 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 problem associated with single point regulation. Each type employs internal current limiting, thermal shut-down and safe area protection, making it essentially indestructible. If adequate heat sinking is provided, they can

TO-220

TO-220FP

D2PAK

deliver over 1A output current, Although designed primarily as fixed voltage regulators, these devices can be used with external components to obtain adjustable voltage and currents.

Schematic diagram

January 2007	Rev. 11	1/28
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		L7800AB/AC series
	Contents
1	Pin configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	. . . . . . . . . . . . . 3
2	Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	. . . . . . . . . . . . 4
3	Test circuits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	. . . . . . . . . . . . 5
4	Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . .	. . . . . . . . . . . . 6
5	Application information . . . . . . . . . . . . . . . . . . . . . . . . . .	. . . . . . . . . . . 15
	5.1 Design consideration . . . . . . . . . . . . . . . . . . . . . . . . . . . .	. . . . . . . . . . . . 15
6	Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . .	. . . . . . . . . . . 18
7	Order code . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	. . . . . . . . . . . 26
8	Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	. . . . . . . . . . . 27

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L7800AB/AC series	Pin configuration

1 Pin configuration

Figure 1. Pin connections (top view)

TO-220	TO-220FP
	D2PAK

Figure 2. Schematic diagram

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Maximum ratings							L7800AB/AC series
2	Maximum ratings
Table 1.	Absolute maximum ratings
Symbol	Parameter						Value		Unit
VI	DC Input voltage	for VO= 5 to 18V				35			V
		for VO= 20, 24V				40
IO	Output current				Internally Limited				mA
PD	Power dissipation				Internally Limited				mW
TSTG	Storage temperature range					-65 to 150			°C
TOP	Operating junction temperature range	for L7800AC				0 to 150			°C
		for L7800AB				-40 to 125
Note:	Absolute Maximum Ratings are those values beyond which damage to the device may
	occur. Functional operation under these condition is not implied
Table 2.	Thermal Data
Symbol	Parameter		TO-220	TO-220FP			D2PAK		Unit
RthJC	Thermal resistance junction-case		3	5			3		°C/W
RthJA	Thermal resistance junction-ambient		50	60			62.5		°C/W

Figure 3. Application circuits

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L7800AB/AC series	Test circuits

3 Test circuits

Figure 4. DC Parameter

Figure 5. Load regulation

Figure 6. Ripple rejection

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Electrical characteristics	L7800AB/AC series

4	Electrical characteristics
Table 3.	Electrical characteristics of L7805A (VI = 10V, IO=1A, TJ = 0 to 150°C (L7805AC),
	TJ = -40 to 125°C (L7805AB), unless otherwise specified)
Symbol	Parameter	Test conditions	Min.	Typ.	Max.		Unit
VO	Output voltage	TJ = 25°C	4.9	5	5.1		V
VO	Output voltage	IO = 5mA to 1A, PO ≤15W	4.8	5	5.2		V
		VI = 7.5 to 20V
		VI = 7.5 to 25V, IO = 500 mA		7	50		mV
∆V (1)	Line regulation	VI = 8 to 12V		10	50		mV
O		VI = 8 to 12V, TJ = 25°C		2	25		mV
		VI = 7.3 to 20V, TJ = 25°C		7	50		mV
		IO = 5mA to 1A		25	100		mV
∆VO(*)	Load regulation	IO = 5mA to 1.5A, TJ = 25°C		30	100		V
		IO = 250 to 750mA		8	50		V
Iq	Quiescent current	TJ = 25°C		4.3	6		mA
					6		mA
		VI = 8 to 25V, IO = 500 mA			0.8		mA
∆Iq	Quiescent current change	VI = 7.5 to 20V, TJ = 25°C			0.8		mA
		IO = 5mA to 1A			0.5		mA
SVR	Supply voltage rejection	VI = 8 to 18V, f = 120Hz, IO = 500mA		68			dB
Vd	Dropout voltage	IO = 1A, TJ = 25°C		2			V
eN	Output noise voltage	TA = 25°C, B =10Hz to 100KHz		10			µV/VO
RO	Output resistance	f =1KHz		17			mΩ
Isc	Short circuit current	VI = 35V, TA = 25°C		0.2			A
Iscp	Short circuit peak current	TJ = 25°C		2.2			A
∆VO/∆T	Output voltage drift			-1.1			mV/°C

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

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L7800AB/AC series							Electrical characteristics
Table 4.		Electrical characteristics of L7806A (VI = 11V, IO=1A, TJ = 0 to 150°C (L7806AC),
		TJ = -40 to 125°C (L7806AB), unless otherwise specified)
Symbol		Parameter		Test conditions			Min.	Typ.	Max.		Unit
VO		Output voltage	TJ = 25°C				5.88	6	6.12		V
VO		Output voltage	IO = 5mA to 1A, PO ≤15W				5.76	6	6.24		V
			VI	= 8.6 to 21V
			VI	= 8.6 to 25V, IO = 500 mA				9	60		mV
∆V	(1)	Line regulation	VI	= 9 to 13V				11	60		mV
O			VI = 9 to 13V, TJ = 25°C					3	30		mV
			VI = 8.3 to 21V, TJ = 25°C					9	60		mV
			IO = 5mA to 1A					25	100		mV
∆V	(1)	Load regulation	I	= 5mA to 1.5A, T	J	= 25°C		30	100		V
O			O
			IO = 250 to 750mA					10	50		V
Iq		Quiescent current	TJ = 25°C					4.3	6		mA
									6		mA
			VI = 9 to 25V, IO = 500 mA						0.8		mA
∆Iq		Quiescent current change	VI = 8.6 to 21V, TJ = 25°C						0.8		mA
			IO = 5mA to 1A						0.5		mA
SVR		Supply voltage rejection	VI = 9 to 19V, f = 120Hz, IO = 500mA					65			dB
Vd		Dropout voltage	IO = 1A, TJ = 25°C					2			V
eN		Output noise voltage	TA = 25°C, B =10Hz to 100KHz					10			µV/VO
RO		Output resistance	f =1KHz					17			mΩ
Isc		Short circuit current	VI = 35V, TA = 25°C					0.2			A
Iscp		Short circuit peak current	TJ = 25°C					2.2			A
∆VO/∆T		Output voltage drift						-0.8			mV/°C

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

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Electrical characteristics								L7800AB/AC series
Table 5.		Electrical characteristics of L7808A (VI = 14V, IO=1A, TJ = 0 to 150°C (L7808AC),
		TJ = -40 to 125°C (L7808AB), unless otherwise specified)
Symbol		Parameter		Test conditions			Min.	Typ.	Max.		Unit
VO		Output voltage	TJ = 25°C				7.84	8	8.16		V
VO		Output voltage	IO = 5mA to 1A, PO ≤15W				7.7	8	8.3		V
			VI	= 10.6 to 23V
			VI	= 10.6 to 25V, IO = 500 mA				12	80		mV
∆V	(1)	Line regulation	VI	= 11 to 17V				15	80		mV
O			VI = 11 to 17V, TJ = 25°C					5	40		mV
			VI = 10.4 to 23V, TJ = 25°C					12	80		mV
			IO = 5mA to 1A					25	100		mV
∆V	(1)	Load regulation	I	= 5mA to 1.5A, T	J	= 25°C		30	100		V
O			O
			IO = 250 to 750mA					10	50		V
Iq		Quiescent current	TJ = 25°C					4.3	6		mA
									6		mA
			VI = 11 to 25V, IO = 500 mA						0.8		mA
∆Iq		Quiescent current change	VI = 10.6 to 23V, TJ = 25°C						0.8		mA
			IO = 5mA to 1A						0.5		mA
SVR		Supply voltage rejection	VI = 11.5 to 21.5V, f = 120Hz,					62			dB
			IO = 500mA
Vd		Dropout voltage	IO = 1A, TJ = 25°C					2			V
eN		Output noise voltage	TA = 25°C, B =10Hz to 100KHz					10			µV/VO
RO		Output resistance	f =1KHz					18			mΩ
Isc		Short circuit current	VI = 35V, TA = 25°C					0.2			A
Iscp		Short circuit peak current	TJ = 25°C					2.2			A
∆VO/∆T		Output voltage drift						-0.8			mV/°C

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

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L7800AB/AC series							Electrical characteristics
Table 6.		Electrical characteristics of L7809A (VI = 15V, IO=1A, TJ = 0 to 150°C (L7809AC),
		TJ = -40 to 125°C (L7809AB), unless otherwise specified)
Symbol		Parameter		Test conditions			Min.	Typ.	Max.		Unit
VO		Output voltage	TJ = 25°C				8.82	9	9.18		V
VO		Output voltage	IO = 5mA to 1A, PO ≤15W				8.65	9	9.35		V
			VI	= 10.6 to 23V
			VI	= 10.6 to 25V, IO = 500 mA				12	90		mV
∆V	(1)	Line regulation	VI	= 11 to 17V				15	90		mV
O			VI = 11 to 17V, TJ = 25°C					5	45		mV
			VI = 10.4 to 23V, TJ = 25°C					12	90		mV
			IO = 5mA to 1A					25	100		mV
∆V	(1)	Load regulation	I	= 5mA to 1.5A, T	J	= 25°C		30	100		V
O			O
			IO = 250 to 750mA					10	50		V
Iq		Quiescent current	TJ = 25°C					4.3	6		mA
									6		mA
			VI = 11 to 25V, IO = 500 mA						0.8		mA
∆Iq		Quiescent current change	VI = 10.6 to 23V, TJ = 25°C						0.8		mA
			IO = 5mA to 1A						0.5		mA
SVR		Supply voltage rejection	VI = 11.5 to 21.5V, f = 120Hz,					61			dB
			IO = 500mA
Vd		Dropout voltage	IO = 1A, TJ = 25°C					2			V
eN		Output noise voltage	TA = 25°C, B =10Hz to 100KHz					10			µV/VO
RO		Output resistance	f =1KHz					18			mΩ
Isc		Short circuit current	VI = 35V, TA = 25°C					0.2			A
Iscp		Short circuit peak current	TJ = 25°C					2.2			A
∆VO/∆T		Output voltage drift						-0.8			mV/°C

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

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