Sipex Corporation SPX2954AM3-3.3, SPX2954AM3-5.0, SPX2954AN-3.3, SPX2954AN-5.0, SPX2954M3-3.3 Datasheet

SPX2954

	250 mA Low Drop Out Voltage Regulator
FEATURES	APPLICATIONS
• Output Accuracy 5V, 3.3V,@ 250mA Output	• Battery Powered Systems
• Very Low Quiescent Current	• Cordless Telephones
• Low Dropout Voltage	• Radio Control Systems
• Extremely Tight Load And Line Regulation	• Portable/Palm Top/Notebook Computers
• Very Low Temperature Coefficient	• Portable Consumer Equipment
• Current & Thermal Limiting	• Portable Instrumentation
• Improved Replacement With Hight IOUT For LP2954 Sockets	• Automotive Electronics
	• SMPS Post-Regulator
SPX2954 Version Over LP2954	• Voltage Reference
• Error Flag Warns Of Output Dropout	• Avionics

•Logic-Controlled Electronic Shutdown

•Output Programmable From 1.24V to 29V

•Input Can Withstand -20V Reverse Battery & +60 Positive Transient

PRODUCT DESCRIPTION

The SPX2954 is a low power voltage regulator. This device is an excellent choice for use in battery-powered applications such as cordless telephones, radio control systems, and portable computers. The SPX2954 features very low quiescent current (75 A Typ.) and very low dropout voltage. This includes a tight initial tolerance of ± 0.5% max and ± 1% max., and very low output temperature coefficient, making the SPX2954 useful as a low-power voltage reference. The key SPX2954 features include protection against reversed battery, fold-back current limiting, and automotive load dump protection (60V positive transient).

The error flag output feature is used as power-on reset for warning of a low output voltage, due to falling voltage input of batteries. Another feature is the logic compatible shutdown input which enables the regulator to be switched on and off. The SPX2954 is offered in a 3-pin TO-92and TO-263 package compatible with other 5 volt regulators, in 8-Pin plastic, SO-8, (same pin out as SPX2951), TO220 and TO-263.

The regulator output voltage (of the 8-pin) may be pin-strapped for a 5Vand 3.3V or programmed from 1.24V to 29V with an external pair of resistors. Look for SPX2951 for 150mA and LP2951 for 100mA applications.

PIN CONNECTIONS

TO-263-3 Package

TO-263-5 Package

8-Pin Surface Mount (S)

SOT-223 Package

TO-220-3 Package TO-220-5 Package

									OUTPUT	1		8	INPUT
	SPX2954			SPX2954					SENSE	2		7	FEEDBACK	SPX2954
										SPX2954
1	2	3	1	2	3	4	5	1) INPUT	SHUTDOWN	3		6	5V, 3.3V TAP	1	2	3	SPX2954			SPX2954
									GND	4		5	ERROR										1) INPUT
								2) OUTPUT
																							2) OUTPUT
								3) GND						VIN		VOUT
										Top View					GND								3) GND
								4) SHUTDOWN						Front View									4) SHUTDOWN
								5) ERROR		TO-92 (N)
V	V	V																					5) ERROR
ADJ	OUT	IN
Top View				Top View						1	2	3					1	2	3	1	2	3 4	5
																	VIN	GND VOUT

Front View

Front View

OUTPUT

INPUT

GND

Bottom View

Rev. 11/21/00

SPX2954

ABSOLUTE MAXIMUM RATINGS

Power Dissipation..........................................	Internally Limited
Lead Temp. (Soldering, 5 Seconds) ................................	260°C
Storage Temperature Range ............................	-65° to +150°C
Operating Junction Temperature Range (Note 9)
SPX2954................................................	-40C° to +125°C

Input Supply Voltage .......................................	-20V to +60V
Feedback Input Voltage .....................................	-1.5 to +30V
Shutdown Input Voltage.....................................	-0.3 to +30V
Error Comparator Output ...................................	-0.3 to +30V
ESD Rating ............................................................	2KV Min

ELECTRICAL CHARACTERISTICS at VS=±15V, TA=25°C, unless otherwise noted. Boldface applies over the full operating temperature range.

Parameter	Conditions	Typical		SPX2954A			SPX2954		Units
			Min		Max	Min		Max
Output Voltage	TJ =25°C	3.3	3.284		3.317	3.267		3.333	V
	-25°C ≤ TJ ≤ +85°C		3.267		3.333	3.251		3.350
	-40°C ≤ TJ ≤ +125°C		3.260		3.340	3.234		3.366
Output Voltage	1mA ≤IL ≤ 250mA	3.3	3.251		3.350	3.201		3.399	V
	TJ ≤TJMAX
Output Voltage	TJ =25°C	5.0	4.975		5.025	4.95		5.05	V
	-25°C ≤ TJ ≤ +85°C	5.0	4.95		5.050	4.925		5.075
	-40°C ≤ TJ ≤ +125°C	5.0	4.94		5.06	4.90		5.10
Output Voltage	1mA ≤IL ≤ 250mA	5.0	4.925		5.075	4.85		5.15	V
	TJ ≤TJMAX
Output Voltage		20			100			150	ppm/°C
Temperature Coefficient	(Note 1)
Line Regulation (Note 3)	6V ≤VIN ≤30V (Note 4)	0.03			0.10			0.20	%max
					0.20			0.40
Load Regulation (Note 3)	IL = 1 to 250 mA	0.04			0.16			0.20	%max
	IL = 0.1 to 1 mA				0.20			0.30
Dropout Voltage	IL = 1mA	60			100			100	mV
(Note 5)	IL = 50mA	220			150			150
					250			250
	IL= 100mA	250			420			420
					300			300
	IL= 250 mA	375			450			450
					450			450
					600			600
Ground Current	IL = 1mA	90			150			150	A
	IL = 50mA	1			180			180
					2			2	mA
	IL = 100mA	4.5			2.5			2.5
					6			6
	IL = 250 mA	21			8			8
					14			20
					16			22
Current Limit	VOUT = 0				550			550	mA
					600			600
Thermal Regulation		0.05			0.2			0.2	%/w
Output Noise,	CL = 2.2 F	400							V rms
10Hz to 100khz	CL = 33 F
IL = 100mA		260
8-Pin Versions only		Typical		SPX2954A			SPX2954
Reference Voltage		1.235	1.220		1.250	1.210		1.260	V
			1.200		1.260	1.200		1.270
Reference Voltage	Over Temperature (Note 6)		1.190		1.27	1.185		1.285	V
Feedback Pin Bias Current		20			40			40	nA
					60			60
Reference Voltage Temperature									ppm/°C
Coefficient	(Note 7)	50
Feedback Pin Bias Current									nA/°C
Temperature Coefficient		0.1

Rev. 11/21/00

										SPX2954
(Continued)
	Parameter	Conditions	Typical		SPX2954A		SPX2954				Units
		(Note 2)		Min		Max	Min		Max
	Applies for SPX2954YT5-X, SPX2954YU5-X and SPX2954YS-X
	Error Comparator
	Output Leakage Current	VOH = 30V	0.01			100			100		A
						2.00			2.00
	Output Low Voltage	VIN = 4.5V	150			250			250		mV
		IOL = 400 A				400			400
	Upper Threshold Voltage	(Note 8)	240	-320		-150	-320		-150		mV
				-380		-100	-380		-100
	Lower Threshold Voltage	(Note 8)	350	-450		230	-450		230		mV
				-640		160	-640		160
	Hysteresis	(Note 8)	60								mV
	Shutdown Input
	VSD	Output Turn-On		1.155		1.305	1.155		1.305
		Threshold Voltage		1.140		1.320	1.140		1.320		V
	Hysteresis(HYST)		6								mV
	Input Bias Current(IB)	VIN(SD) = 0V to 5V	10	-30		-30	-30		-30		nA
				-50		-50	-50		-50

Note 1: Output or reference voltage temperature coefficients defined as the worst case voltage change divided by the total temperature range.

Note 2: Unless otherwise specified all limits are guaranteed for TJ = 25°C, VIN = 6V, IL = 100 A and CL = 1 F. Additional conditions for the 8-pin versions are

feedback tied to 5V tap and output tied to output sense (VOUT = 5V) and VSHUTDOWN ≤ 0.8V.

Note 3: Regulation is measured at constant junction temperature, using pulse testing with a low duty cycle. Changes in output voltage due to heating effects are covered under the specification for thermal regulation.

Note 4: Line regulation for the SPX2954 is tested at 150°C for IL = 1 mA. For IL = 100 A and TJ = 125°C, line regulation is guaranteed by design to 0.2%. See typical performance characteristics for line regulation versus temperature and load current.

Note 5: Dropout voltage is defined as the input to output differential at which the output voltage drops 100 mV below its nominal value measured at 1V differential at very low values of programmed output voltage, the minimum input supply voltage of 2V (2.3V over temperature) must be taken into account.

Note 6: VREF ≤VOUT ≤ (VIN - 1V), 2.3 ≤VIN≤30V, 100 A≤IL≤ 250 mA, TJ ≤ TJMAX.

Note 7: Comparator thresholds are expressed in terms of a voltage differential at the feedback terminal below the nominal reference voltage measured at 6V input. To express these thresholds in terms of output voltage change, multiply by the error amplifier gain = VOUT/VREF = (R1 + R2)/R2. For example, at a programmed output voltage of 5V, the ERROR output is guaranteed to go low when the output drops by 95 mV x 5V/1.235 = 384 mV. Thresholds remain constant as a percent of VOUT as VOUT is varied, with the dropout warning occurring at typically 5% below nominal, 7.5% guaranteed.

Note 8: VSHUTDOWN ≥ 2V, VIN ≤ 30V, VOUT =0, feedback pin tied to 5V Tap.

Note 9: The junction -to-ambient thermal resistance of the TO-92 package is 180°C/ W with 0.4” leads and 160°C/ W with 0.25” leads to a PC board.

The thermal resistance of the 8-Pin DIP package is 105°C/W junction-to-ambient when soldered directly to a PC board. Junction-to-ambient thermal resistance for the SOIC (S) package is 160°C/W.

UNREGULATED DC

VO

7

8

1

5V @ 250mA

MAX

+

FEEDBACK

INPUT

OUTPUT

					2
					SENSE
		+	180kΩ ..
					6
		_
	3		ERROR
FROM
			AMPLIFIER		5V TAP	330kΩ
CMOS OR	SHUTDOWN
TTL						+
			60k	Ω ..	5
	+					1µF..
		+			______
	60 mV
		_	ERROR		ERROR
						TO CMOS OR
	+ 1.23V		COMPARATOR
						TTL
					4
	REFERENCE				GROUND

SPX2954 Block Diagram

Rev. 11/21/00