SGS Thomson Microelectronics LD1585CD2T90, LD1585CD2T80, LD1585CD2T50, LD1585CD2T33, LD1585CD2T28 Datasheet

LD1585C

SERIES

5A LOW DROPOUT FAST RESPONSE POSITIVE VOLTAGE REGULATOR ADJUSTABLE AND FIXED

■TYPICAL DROPOUT 1.2V

■FAST TRANSIENT RESPONSE

■THREE TERMINAL ADJUSTABLE OR FIXED OUTPUT VOLTAGE 1.5V 1.8V, 2.5V, 2.85V, 3.3V, 5V, 8V, 9V, 12V.

■GUARANTEED OUTPUT CURRENT UP TO 5A

■OUPUT TOLERANCE ±1% AT 25°C AND

±2% IN FULL TEMPERATURE RANGE

■INTERNAL POWER AND THERMAL LIMIT

■WIDE OPERATING TEMPERATURE RANGE 0°C TO 125°C

■PACKAGE AVAILABLE : TO-220, D2PAK, D2PAK/A

■PINOUT COMPATIBILITY WITH STANDARD ADJUSTABLE VREG

DESCRIPTION

The LD1585C is a LOW DROP Voltage Regulator able to provide up to 5A of Output Current. Dropout is guaranteed at a maximum of 1.4V at the maximum output current, decreasing at lower loads. The device has been improved to be utilized in low voltage applications where transient response and minimum input voltage are critical.

The most important feature of the device consist in lower dropout voltage and very fast transient

TO-220

D2PAK

D2PAK/A

response. A 2.85V output version is suitable for SCSI-2 active termination. Unlike PNP regulators, where a part of the output current is wasted as quiescent current, the LD1585C quiescent current flows into the load, so increase efficiency. Only a 10µF minimum capacitor is need for stability.

The device is supplied in TO-220, D2PAK and D2PAK/A. On chip trimming allows the regulator to reach a very tight output voltage tolerance, within ±1% at 25°C.

SCHEMATIC DIAGRAM

September 2003

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LD1585C SERIES

ABSOLUTE MAXIMUM RATINGS

Symbol	Parameter²	Value	Unit
VI	DC Input Voltage	30	V
IO	Output Current	Internally Limited	mA
PD	Power Dissipation	Internally Limited	mW
Tstg	Storage Temperature Range	-55 to +150	°C
Top	Operating Junction Temperature Range	0 to +125	°C

Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these condition is not implied.

THERMAL DATA

Symbol	Parameter	TO-220	D2PAK	Unit
Rthj-case	Thermal Resistance Junction-case	3	3	°C/W
Rthj-amb	Thermal Resistance Junction-ambient	50	62.5	°C/W

APPLICATION CIRCUITS

R2

VO = VREF (1 + ¾¾)

R1

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LD1585C SERIES

CONNECTION DIAGRAM (top view)

	TO-220
D2PAK	D2PAK/A

ORDERING CODES

TO-220	D2PAK (*)	D2PAK/A (*)	OUTPUT VOLTAGE
LD1585CV15	LD1585CD2T15	LD1585CD2M15	1.5 V
LD1585CV18	LD1585CD2T18	LD1585CD2M18	1.8 V
LD1585CV25	LD1585CD2T25	LD1585CD2M25	2.5 V
LD1585CV28	LD1585CD2T28	LD1585CD2M28	2.85 V
LD1585CV33	LD1585CD2T33	LD1585CD2M33	3.3 V
LD1585CV50	LD1585CD2T50	LD1585CD2M50	5.0 V
LD1585CV80	LD1585CD2T80	LD1585CD2M80	8.0 V
LD1585CV90	LD1585CD2T90	LD1585CD2M90	9.0 V
LD1585CV12	LD1585CD2T120	LD1585CD2M120	12.0 V
LD1585CV	LD1585CD2T	LD1585CD2M	ADJ

(*) Available in Tape & Reel with the suffix "R" for fixed version and "-R" for adjustable version.

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LD1585C SERIES

ELECTRICAL CHARACTERISTICS OF LD1585#15 (VI=4.5V, CI = CO =10μF, TJ = 0 to 125°C, unless otherwise specified.)

Symbol	Parameter		Test Conditions		Min.	Typ.	Max.	Unit
VO	Output Voltage	IO = 0 mA	TJ = 25°C		1.485	1.5	1.515	V
		IO = 0 to 5A	VI = 3 to 25V (note 1)		1.47	1.5	1.53	V
VO	Line Regulation	IO = 0 mA	VI = 3 to 15V	TJ = 25°C		0.005	0.2	%
		IO = 0 mA	VI = 3 to 15V			0.005	0.2	%
VO	Load Regulation	IO = 0 to 5A	TJ = 25°C			0.05	0.3	%
		IO = 0 to 5A				0.05	0.5	%
Vd	Dropout Voltage	IO =5 A				1.2	1.4	V
Iq	Quiescent Current	VI ≤ 25V				5	10	mA
Isc	Short Circuit Current	VI - VO = 5V			5.5	7		A
	Termal Regulation	TJ = 25°C, 30ms pulse				0.004	0.02	%/W
SVR	Supply Voltage Rejection	f = 120 Hz,	CO = 25 μF,	IO = 5A	60	75		dB
		VI - VO = 3 ± 1V
eN	RMS Output Noise Voltage	TJ = 25°C f =10Hz to 10KHz				0.003		%
	(% of VO)
S	Temperature Stability					0.5		%
S	Long Term Stability	TJ = 125°C	1000Hrs			0.03	1	%

NOTE 1: See short-circuit current curve for available output current at fixed dropout.

ELECTRICAL CHARACTERISTICS OF LD1585#18 (VI=4.8V, CI = CO =10μF, TJ = 0 to 125°C, unless otherwise specified.)

Symbol	Parameter		Test Conditions	Min.	Typ.	Max.	Unit
VO	Output Voltage	IO = 0 mA	TJ = 25°C	1.782	1.8	1.818	V
		IO = 0 to 5A	VI = 3.3 to 25V (note 1)	1.764	1.8	1.836	V
VO	Line Regulation	IO = 0 mA	VI = 3.3 to 15V TJ = 25°C		0.005	0.2	mV
		IO = 0 mA	VI = 3.3 to 15V		0.005	0.2
VO	Load Regulation	IO = 0 to 5A	TJ = 25°C		0.05	0.3	mV
		IO = 0 to 5A			0.05	0.5
Vd	Dropout Voltage	IO =5 A			1.2	1.4	V
Iq	Quiescent Current	VI ≤ 25V			5	10	mA
Isc	Short Circuit Current	VI - VO = 5.5V		5.5	7		A
	Termal Regulation	TJ = 25°C, 30ms pulse			0.004	0.02	%/W
SVR	Supply Voltage Rejection	f = 120 Hz,	CO = 25 μF, IO = 5A	60	75		dB
		VI - VO = 3 ± 1V
eN	RMS Output Noise Voltage	TJ = 25°C f =10Hz to 10KHz			0.003		%
	(% of VO)
S	Temperature Stability				0.5		%
S	Long Term Stability	TJ = 125°C	1000Hrs		0.03	1	%

NOTE 1: See short-circuit current curve for available output current at fixed dropout.

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LD1585C SERIES

ELECTRICAL CHARACTERISTICS OF LD1585#25 (VI=5.5V, CI = CO =10μF, TJ = 0 to 125°C, unless otherwise specified.)

Symbol	Parameter		Test Conditions		Min.	Typ.	Max.	Unit
VO	Output Voltage	IO = 0 mA	TJ = 25°C		2.475	2.5	2.525	V
		IO = 0 to 5A	VI = 4 to 25V (note 1)		2.45	2.5	2.55	V
VO	Line Regulation	IO = 0 mA	VI = 4 to 16V	TJ = 25°C		0.005	0.2	mV
		IO = 0 mA	VI = 4 to 16V			0.005	0.2
VO	Load Regulation	IO = 0 to 5A	TJ = 25°C			0.05	0.3	mV
		IO = 0 to 5A				0.05	0.5
Vd	Dropout Voltage	IO =5 A				1.2	1.4	V
Iq	Quiescent Current	VI ≤ 25V				5	10	mA
Isc	Short Circuit Current	VI - VO = 5.5V			5.5	7		A
	Termal Regulation	TJ = 25°C, 30ms pulse				0.004	0.02	%/W
SVR	Supply Voltage Rejection	f = 120 Hz,	CO = 25 μF,	IO = 5A	60	75		dB
		VI - VO = 3 ± 1V
eN	RMS Output Noise Voltage	TJ = 25°C f =10Hz to 10KHz				0.003		%
	(% of VO)
S	Temperature Stability					0.5		%
S	Long Term Stability	TJ = 125°C	1000Hrs			0.03	1	%

NOTE 1: See short-circuit current curve for available output current at fixed dropout.

ELECTRICAL CHARACTERISTICS OF LD1585#285 (VI=5.85V, CI = CO =10μF, TJ = 0 to 125°C, unless otherwise specified.)

Symbol	Parameter		Test Conditions	Min.	Typ.	Max.	Unit
VO	Output Voltage	IO = 0 mA	TJ = 25°C	2.821	2.85	2.879	V
		IO = 0 to 5A	VI = 4.5 to 30V (note 1)	2.793	2.85	2.907	V
VO	Line Regulation	IO = 0 mA	VI = 4.5 to 18V TJ = 25°C		0.005	0.2	mV
		IO = 0 mA	VI = 4.5 to 18V		0.005	0.2
VO	Load Regulation	IO = 0 to 5A	TJ = 25°C		0.05	0.3	mV
		IO = 0 to 5A			0.05	0.5
Vd	Dropout Voltage	IO =5 A			1.2	1.4	V
Iq	Quiescent Current	VI ≤ 25V			5	10	mA
Isc	Short Circuit Current	VI - VO = 5.5V		5.5	7		A
	Termal Regulation	TJ = 25°C, 30ms pulse			0.004	0.02	%/W
SVR	Supply Voltage Rejection	f = 120 Hz,	CO = 25 μF, IO = 5A	60	75		dB
		VI - VO = 3 ± 1V
eN	RMS Output Noise Voltage	TJ = 25°C f =10Hz to 10KHz			0.003		%
	(% of VO)
S	Temperature Stability				0.5		%
S	Long Term Stability	TJ = 125°C	1000Hrs		0.03	1	%

NOTE 1: See short-circuit current curve for available output current at fixed dropout.

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LD1585C SERIES

ELECTRICAL CHARACTERISTICS OF LD1585#33 (VI=6.3V, CI = CO =10μF, TJ = 0 to 125°C, unless otherwise specified.)

Symbol	Parameter		Test Conditions	Min.	Typ.	Max.	Unit
VO	Output Voltage	IO = 0 mA	TJ = 25°C	3.267	3.3	3.333	V
		IO = 0 to 5A	VI = 4.8 to 25V (note 1)	3.234	3.35	3.366	V
VO	Line Regulation	IO = 0 mA	VI = 4.8 to 18V TJ = 25°C		0.005	0.2	mV
		IO = 0 mA	VI = 4.9 to 18V		0.005	0.2
VO	Load Regulation	IO = 0 to 5A	TJ = 25°C		0.05	0.3	mV
		IO = 0 to 5A			0.05	0.5
Vd	Dropout Voltage	IO =5 A			1.2	1.4	V
Iq	Quiescent Current	VI ≤ 25V			5	10	mA
Isc	Short Circuit Current	VI - VO = 5.5V		5.5	7		A
	Termal Regulation	TJ = 25°C, 30ms pulse			0.004	0.02	%/W
SVR	Supply Voltage Rejection	f = 120 Hz,	CO = 25 μF, IO = 5A	60	75		dB
		VI - VO = 3 ± 1V
eN	RMS Output Noise Voltage	TJ = 25°C f =10Hz to 10KHz			0.003		%
	(% of VO)
S	Temperature Stability				0.5		%
S	Long Term Stability	TJ = 125°C	1000Hrs		0.03	1	%

NOTE 1: See short-circuit current curve for available output current at fixed dropout.

ELECTRICAL CHARACTERISTICS OF LD1585#50 (VI=8V, CI = CO =10μF, TJ = 0 to 125°C, unless otherwise specified.)

Symbol	Parameter		Test Conditions	Min.	Typ.	Max.	Unit
VO	Output Voltage	IO = 0 mA	TJ = 25°C	4.95	5	5.05	V
		IO = 0 to 5A	VI = 6.5 to 30V (note 1)	4.9	5	5.1	V
VO	Line Regulation	IO = 0 mA	VI = 6.5 to 20V TJ = 25°C		0.005	0.2	mV
		IO = 0 mA	VI = 6.5 to 20V		0.005	0.2
VO	Load Regulation	IO = 0 to 5A	TJ = 25°C		0.05	0.3	mV
		IO = 0 to 5A			0.05	0.5
Vd	Dropout Voltage	IO =5 A			1.2	1.4	V
Iq	Quiescent Current	VI ≤ 25V			5	10	mA
Isc	Short Circuit Current	VI - VO = 5.5V		5.5	7		A
	Termal Regulation	TJ = 25°C, 30ms pulse			0.004	0.02	%/W
SVR	Supply Voltage Rejection	f = 120 Hz,	CO = 25 μF, IO = 5A	60	75		dB
		VI - VO = 3 ± 1V
eN	RMS Output Noise Voltage	TJ = 25°C f =10Hz to 10KHz			0.003		%
	(% of VO)
S	Temperature Stability				0.5		%
S	Long Term Stability	TJ = 125°C	1000Hrs		0.03	1	%

NOTE 1: See short-circuit current curve for available output current at fixed dropout.

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