SGS Thomson Microelectronics LD2982BM28R, LD2982BM25R, LD2982BM18R, LD2982AM50R, LD2982AM47R Datasheet

LD2982

SERIES

VERY LOW DROP AND LOW NOISE VOLTAGE REGULATOR WITH INHIBIT FUNCTION, LOW ESR CAP. COMPATIBLE

■VERY LOW DROPOUT VOLTAGE (120mV AT 50mA AND 7mV AT 1mA LOAD)

■VERY LOW QUIESCENT CURRENT (375μA TYP. AT 50mA LOAD AND 75μA AT 1mA)

■OUTPUT CURRENT UP TO 50mA

■LOGIC CONTROLLED ELECTRONIC SHUTDOWN

■OUTPUT VOLTAGE OF 1.5,1.8, 2.5, 2.8, 2.85, 3, 3.1, 3.2, 3.3, 3.5, 3.6, 3.8, 4, 4.7, 5V

■INTERNAL CURRENT AND THERMAL LIMIT

■AVAILABLE IN ± 1% TOLLERANCE (AT 25°C, A VERSION)

■SUPPLY VOLTAGE REJECTION: 45dB (TYP)

■ONLY 1µF FOR STABILITY

■LOW OUTPUT NOISE VOLTAGE 30µVrms

■SMALLEST PACKAGE SOT23-5L

■TEMPERATURE RANGE: -40°C TO 125°C

DESCRIPTION

The LD2982 is a 50mA fixed output voltage regulator. The ultra low drop voltage and the low quiescent current make them particularly suitable for low noise, low power applications, and in battery powered systems. In sleep mode quiescent current is less than 1µA when INHIBIT

SOT23-5L

pin is pulled low. Shutdown Logic Control Function is available on pin 3 (TTL compatible). This means that when the device is used as local regulator, it is possible to put a part of the board in standby, decreasing the total power consumption.

An external capacitor CBYP=10nF connected between bypass pin and GND reduce the noise to 30µVrms.

Typical application are in cellular phone, palmtop/ laptop computer, personal digital assistant (PDA), personal stereo, camcorder and camera.

SCHEMATIC DIAGRAM

July 2003

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LD2982 SERIES

ABSOLUTE MAXIMUM RATINGS

Symbol	Parameter	Value	Unit
VI	DC Input Voltage	16	V
VINH	INHIBIT Input Voltage	16	V
IO	Output Current	Internally limited
Ptot	Power Dissipation	Internally limited
Tstg	Storage Temperature Range	-65 to +150	°C
Top	Operating Junction Temperature Range	-40 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	SOT23-5L	Unit
Rthj-case	Thermal Resistance Junction-case	81	°C/W

CONNECTION DIAGRAM (top view)	PIN DESCRIPTION
	Pin N°	Symbol	Name and Function
	1	IN	Input Port
	2	GND	Ground Pin
	3	INHIBIT	Control switch ON/OFF. Inhibit is not
			internally pulled-up; it cannot be left
			floating. Disable the device when
			connected to GND or to a positive
			voltage less than 0.18V
	4	Bypass	Bypass Pin: Capacitor to be
SOT23-5L			connected to GND in order to
			improve the thermal noise
			performances.
	5	OUT	Output Port
ORDERING CODES
A VERSION	B VERSION		OUTPUT VOLTAGES
LD2982AM15R	LD2982BM15R		1.5V
LD2982AM18R	LD2982BM18R		1.8V
LD2982AM25R	LD2982BM25R		2.5V
LD2982AM28R	LD2982BM28R		2.8V
LD2982AM285R	LD2982BM285R		2.85V
LD2982AM30R	LD2982BM30R		3.0V
LD2982AM31R	LD2982BM31R		3.1V
LD2982AM32R	LD2982BM32R		3.2V
LD2982AM33R	LD2982BM33R		3.3V
LD2982AM35R	LD2982BM35R		3.5V
LD2982AM36R	LD2982BM36R		3.6V
LD2982AM38R	LD2982BM38R		3.8V
LD2982AM40R	LD2982BM40R		4.0V
LD2982AM47R	LD2982BM47R		4.7V
LD2982AM50R	LD2982BM50R		5.0V
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LD2982 SERIES

ELECTRICAL CHARACTERISTICS FOR LD2982A (TJ = 25°C, V I=VO+1V, IO=1mA, VSHDN=2V, CI = 1μF, CO = 1μF, unless otherwise specified)

Symbol	Parameter	Test Conditions		Min.	Typ.	Max.	Unit
VOp	Operating Input Voltage			2.5		16	V
VO	Output Voltage	VI = 2.5V		1.485	1.5	1.515	V
		IO = 1 to 50mA		1.477		1.523	V
		IO = 1 to 50mA	TJ= -40 to 125°C	1.470		1.530	V
VO	Output Voltage	VI = 2.8V		1.782	1.8	1.818	V
		IO = 1 to 50mA		1.773		1.827	V
		IO = 1 to 50mA	TJ= -40 to 125°C	1.764		1.836	V
VO	Output Voltage	VI = 3.5V		2.475	2.5	2.525	V
		IO = 1 to 50mA		2.462		2.537	V
		IO = 1 to 50mA	TJ= -40 to 125°C	2.45		2.55	V
VO	Output Voltage	VI = 3.8V		2.772	2.8	2.828	V
		IO = 1 to 50mA		2.758		2.842	V
		IO = 1 to 50mA	TJ= -40 to 125°C	2.744		2.856	V
VO	Output Voltage	VI = 3.85V		2.821	2.85	2.879	V
		IO = 1 to 50mA		2.807		2.893	V
		IO = 1 to 50mA	TJ= -40 to 125°C	2.793		2.907	V
VO	Output Voltage	VI = 4.0V		2.970	3.0	3.030	V
		IO = 1 to 50mA		2.955		3.045	V
		IO = 1 to 50mA	TJ= -40 to 125°C	2.94		3.06	V
VO	Output Voltage	VI = 4.1V		3.069	3.1	3.131	V
		IO = 1 to 50mA		3.053		3.146	V
		IO = 1 to 50mA	TJ= -40 to 125°C	3.038		3.162	V
VO	Output Voltage	VI = 4.2V		3.168	3.2	3.232	V
		IO = 1 to 50mA		3.152		3.248	V
		IO = 1 to 50mA	TJ= -40 to 125°C	3.136		3.264	V
VO	Output Voltage	VI = 4.3V		3.267	3.3	3.333	V
		IO = 1 to 50mA		3.250		3.349	V
		IO = 1 to 50mA	TJ= -40 to 125°C	3.234		3.366	V
VO	Output Voltage	VI = 4.5V		3.465	3.5	3.535	V
		IO = 1 to 50mA		3.447		3.552	V
		IO = 1 to 50mA	TJ= -40 to 125°C	3.43		3.57	V
VO	Output Voltage	VI = 4.6V		3.564	3.6	3.636	V
		IO = 1 to 50mA		3.546		3.654	V
		IO = 1 to 50mA	TJ= -40 to 125°C	3.528		3.672	V
VO	Output Voltage	VI = 4.8V		3.762	3.8	3.838	V
		IO = 1 to 50mA		3.743		3.857	V
		IO = 1 to 50mA	TJ= -40 to 125°C	3.724		3.876	V
VO	Output Voltage	VI = 5.0V		3.96	4	4.04	V
		IO = 1 to 50mA		3.94		4.06	V
		IO = 1 to 50mA	TJ= -40 to 125°C	3.92		4.08	V

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LD2982 SERIES

Symbol	Parameter		Test Conditions			Min.	Typ.	Max.	Unit
VO	Output Voltage	VI = 5.7V				4.653	4.7	4.747	V
		IO = 1 to 50mA				4.629		4.77	V
		IO = 1 to 50mA		TJ= -40 to 125°C		4.606		4.794	V
VO	Output Voltage	VI = 6.0V				4.95	5	5.05	V
		IO = 1 to 50mA				4.925		5.075	V
		IO = 1 to 50mA		TJ= -40 to 125°C		4.9		5.1	V
ISC	Short Circuit Current	RL = 0					150		mA
VO/ VI	Line Regulation	VI = VO+1V to 16V, IO = 1mA					0.003	0.014	%/VI
		VI = VO+1V to 16V, IO = 1mA						0.032	%/VI
		TJ= -40 to 125°C
Vd	Dropout Voltage	IO = 0					1	3	mV
		IO = 0	TJ= -40 to 125°C					5	mV
		IO = 1mA					7	10	mV
		IO = 1mA	TJ= -40 to 125°C					15	mV
		IO = 10mA					40	60	mV
		IO = 10mA TJ= -40 to 125°C						90	mV
		IO = 50mA					120	150	mV
		IO = 50mA TJ= -40 to 125°C						225	mV
Id	Quiescent Current	IO = 0					80	100	μA
		IO = 0	TJ= -40 to 125°C					150	μA
		IO = 1mA					100	150	μA
		IO = 1mA	TJ= -40 to 125°C					200	μA
		IO = 10mA					200	300	μA
		IO = 10mA TJ= -40 to 125°C						400	μA
		IO = 50mA					600	900	μA
		IO = 50mA TJ= -40 to 125°C						1200	μA
		OFF MODE	VINH<0.18V				0		μA
		OFF MODE	VINH<0.18V					1	μA
		TJ= -40 to 125°C
SVR	Supply Voltage Rejection	CBYP = 0.01μF		CO = 10μF	f = 1KHz		45		dB
VIL	Control Input Logic Low	TJ= -40 to 125°C						0.15	V
VIH	Control Input Logic High	TJ= -40 to 125°C				2			V
IiNH	Control Input Current	TJ= -40 to 125°C		VSHDN = 5V			5	15	μA
		TJ= -40 to 125°C		VSHDN = 0V			0	-1	μA
eN	Output Noise Voltage	B= 300Hz to 50KHz					30		μV
		CBYP = 0.01μF		CO = 10μF

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