SGS Thomson Microelectronics LD1117AV50, LD1117AV33, LD1117AV28, LD1117AV25, LD1117AV18 Datasheet

LD1117A

SERIES

LOW DROP FIXED AND ADJUSTABLE POSITIVE VOLTAGE REGULATORS

■LOW DROPOUT VOLTAGE (1.15V TYP. @ IOUT = 1A, 25°C)

■VERY LOW QUIESCENT CURRENT (5 mA TYP. @ 25°C)

■OUTPUT CURRENT UP TO 1A

■FIXED OUTPUT VOLTAGE OF: 1.8V, 2.5V, 2.85V, 3.3V, 5.0V

■ADJUSTABLE VERSION AVAILABILITY (Vrel = 1.25V)

■INTERNAL CURRENT AND THERMAL LIMIT

■ONLY 10 µF FOR STABILITY

■AVAILABLE IN ± 2% (AT 25°C) AND 4% IN FULL TEMPERATURE RANGE

■HIGH SUPPLY VOLTAGE REJECTION: (80dB TYP. AT 25°C)

■TEMPERATURE RANGE: 0°C TO 125°C

DESCRIPTION

The LD1117A is a LOW DROP Voltage Regulator able to provide up to 1A of Output Current, available even in adjustable version (Vref=1.25V). Concerning fixed versions, are offered the following Output Voltages: 1.8V, 2.5V, 2.85V, 3.3V and 5.0V. The 2.85V type is ideal for SCSI-2 lines active termination. The device is supplied in:

SOT-223

TO-220

DPAK

SOT-223, DPAK and TO-220. The surface mount packages optimize the thermal characteristics even offering a relevant space saving effect. High efficiency is assured by NPN pass transistor. Only a very common 10µF minimum capacitor is needed for stability. Only chip trimming allows the regulator to reach a very tight output voltage tolerance, within ± 2% at 25 °C.

BLOCK DIAGRAM

October 2003

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LD1117A SERIES

ABSOLUTE MAXIMUM RATINGS

Symbol	Parameter²	Value	Unit
VIN	DC Input Voltage	10	V
Ptot	Power Dissipation	12	W
Tstg	Storage Temperature Range	-40 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. Over the above suggested Max Power Dissipation a Short Circuit could definitively damage the device.

THERMAL DATA

Symbol	Parameter	TO-220	SOT-223	DPAK	Unit
Rthj-case	Thermal Resistance Junction-case	3	15	8	°C/W
Rthj-amb	Thermal Resistance Junction-ambient	50			°C/W

APPLICATION CIRCUIT (FOR OTHER FIXED OUTPUT VOLTAGES)

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LD1117A SERIES

CONNECTION DIAGRAM (top view)

DPAK

SOT-223

TO-220

NOTE: The TAB is connected to the VOUT.

ORDERING CODES

SOT-223	DPAK	TO-220	OUTPUT VOLTAGE
LD1117AS18TR	LD1117ADT18TR	LD1117AV18	1.8 V
LD1117AS25TR	LD1117ADT25TR	LD1117AV25	2.5 V
LD1117AS28TR	LD1117ADT28TR	LD1117AV28	2.85 V
LD1117AS33TR	LD1117ADT33TR	LD1117AV33	3.3 V
LD1117AS50TR	LD1117ADT50TR	LD1117AV50	5 V
LD1117AST-R	LD1117ADT-R	LD1117AV	ADJUSTABLE FROM 1.25
			TO 15 V

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LD1117A SERIES

ELECTRICAL CHARACTERISTICS OF LD1117A#18 (refer to the test circuits, TJ = 0 to 125°C, CO = 10 µF, CI = 10 µF unless otherwise specified)

Symbol	Parameter		Test Conditions		Min.	Typ.	Max.	Unit
VO	Output Voltage	VI = 3.8 V	IO = 10 mA TJ = 25°C		1.764	1.8	1.836	V
VO	Output Voltage	IO = 0 to 1 A		VI = 3.3 to 8 V	1.728		1.872	V
VO	Line Regulation	VI = 3.3 to 8 V		IO = 0 mA		1	6	mV
VO	Load Regulation	VI = 3.3 V		IO = 0 to 1 A		1	10	mV
VO	Temperature Stability					0.5		%
VO	Long Term Stability	1000 hrs, TJ = 125°C				0.3		%
VI	Operating Input Voltage	IO = 100 mA					10	V
Id	Quiescent Current	VI ≤ 8 V	IO = 0 mA			5	10	mA
IO	Output Current	VI - VO = 5 V TJ = 25°C			1000			mA
eN	Output Noise Voltage	B =10Hz to 10KHz		TJ = 25°C		100		μV
SVR	Supply Voltage Rejection	IO = 40 mA	f = 120Hz		60	80		dB
		VI - VO = 3 V Vripple = 1 VPP
VD	Dropout Voltage	IO = 100 mA				1	1.10	V
		IO = 500 mA				1.05	1.15
		IO = 1 A				1.15	1.30
VO(pwr)	Thermal Regulation	Ta = 25°C	30ms Pulse			0.08	0.2	%/W

ELECTRICAL CHARACTERISTICS OF LD1117A#25 (refer to the test circuits, TJ = 0 to 125°C, CO = 10 µF, CI = 10 µF unless otherwise specified)

Symbol	Parameter		Test Conditions		Min.	Typ.	Max.	Unit
VO	Output Voltage	VI = 4.5 V	IO = 10 mA TJ = 25°C		2.45	2.5	2.55	V
VO	Output Voltage	IO = 0 to 1 A		VI = 3.9 to 8 V	2.4		2.6	V
VO	Line Regulation	VI = 3.9 to 8 V		IO = 0 mA		1	6	mV
VO	Load Regulation	VI = 3.9 V		IO = 0 to 1 A		1	10	mV
VO	Temperature Stability					0.5		%
VO	Long Term Stability	1000 hrs, TJ = 125°C				0.3		%
VI	Operating Input Voltage	IO = 100 mA					10	V
Id	Quiescent Current	VI ≤ 10 V	IO = 0 mA			5	10	mA
IO	Output Current	VI - VO = 5 V TJ = 25°C			1000	1200		mA
eN	Output Noise Voltage	B =10Hz to 10KHz		TJ = 25°C		100		μV
SVR	Supply Voltage Rejection	IO = 40 mA	f = 120Hz		60	80		dB
		VI - VO = 3 V Vripple = 1 VPP
VD	Dropout Voltage	IO = 100 mA				1	1.10	V
		IO = 500 mA				1.05	1.15
		IO = 1 A				1.15	1.30
VO(pwr)	Thermal Regulation	Ta = 25°C	30ms Pulse			0.08	0.2	%/W

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LD1117A SERIES

ELECTRICAL CHARACTERISTICS OF LD1117A#28 (refer to the test circuits, TJ = 0 to 125°C, CO = 10 µF, CI = 10 µF unless otherwise specified)

Symbol	Parameter		Test Conditions		Min.	Typ.	Max.	Unit
VO	Output Voltage	VI = 4.85 V	IO = 10 mA TJ = 25°C		2.793	2.85	2.907	V
VO	Output Voltage	IO = 0 to 1 A		VI = 4.25 to 10 V	2.736		2.964	V
VO	Line Regulation	VI = 4.25 to 8 V		IO = 0 mA		1	6	mV
VO	Load Regulation	VI = 4.25 V		IO = 0 to 1 A		1	10	mV
VO	Temperature Stability					0.5		%
VO	Long Term Stability	1000 hrs, TJ = 125°C				0.3		%
VI	Operating Input Voltage	IO = 100 mA					10	V
Id	Quiescent Current	VI ≤ 10 V	IO = 0 mA			4.5	10	mA
IO	Output Current	VI - VO = 5 V TJ = 25°C			1000	1200		mA
eN	Output Noise Voltage	B =10Hz to 10KHz		TJ = 25°C		100		μV
SVR	Supply Voltage Rejection	IO = 40 mA	f = 120Hz		60	75		dB
		VI - VO = 3 V Vripple = 1 VPP
VD	Dropout Voltage	IO = 100 mA				1	1.10	V
		IO = 500 mA				1.05	1.15
		IO = 1 A				1.15	1.30
VO(pwr)	Thermal Regulation	Ta = 25°C	30ms Pulse			0.08	0.2	%/W

ELECTRICAL CHARACTERISTICS OF LD1117A#33 (refer to the test circuits, TJ = 0 to 125°C, CO = 10 µF, CI = 10 µF unless otherwise specified)

Symbol	Parameter		Test Conditions		Min.	Typ.	Max.	Unit
VO	Output Voltage	VI = 5.3 V	IO = 10 mA TJ = 25°C		3.234	3.3	3.366	V
VO	Output Voltage	IO = 0 to 1 A		VI = 4.75 to 10 V	3.168		3.432	V
VO	Line Regulation	VI = 4.75 to 8 V		IO = 0 mA		1	6	mV
VO	Load Regulation	VI = 4.75 V		IO = 0 to 1 A		1	10	mV
VO	Temperature Stability					0.5		%
VO	Long Term Stability	1000 hrs, TJ = 125°C				0.3		%
VI	Operating Input Voltage	IO = 100 mA					10	V
Id	Quiescent Current	VI ≤ 10 V	IO = 0 mA			5	10	mA
IO	Output Current	VI - VO = 5 V TJ = 25°C			1000	1200		mA
eN	Output Noise Voltage	B =10Hz to 10KHz		TJ = 25°C		100		μV
SVR	Supply Voltage Rejection	IO = 40 mA	f = 120Hz		60	75		dB
		VI - VO = 3 V Vripple = 1 VPP
VD	Dropout Voltage	IO = 100 mA				1	1.10	V
		IO = 500 mA				1.05	1.15
		IO = 1 A				1.15	1.30
VO(pwr)	Thermal Regulation	Ta = 25°C	30ms Pulse			0.08	0.2	%/W

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