Calogic LLC LP2951CS-3, LP2951CP-5, LP2951CP-3.3, LP2951CS-5, LP2951CS-3.3 Datasheet

100mA Low Dropout

Voltage Regulators

CORPORATION

LP2950 / LP2951

FEATURES

PRODUCT DESCRIPTION

∙ 5V, 3.3V, and 3.0V Versions at 100mA Output

The Calogic LP2950 and LP2951 are low power voltage

∙ Very Low Quiescent Current

regulators. These devices are an excellent choice for use in

∙ Low Dropout Voltage

battery-powered applications such as cordless telephones,

∙ Extremely Tight Load and Line Regulation

radio control systems, and portable computers. The LP2950

∙ Very Low Temperature Coefficient

and LP2951 features very low quiescent current and very low

∙ Current and Thermal Limiting

dropout voltage (Typ. 50mV at light load and 380mV at 100mA).

∙ Needs Only 1μF for Stability

This includes a tight initial tolerance of 0.5% typ., extremely

good load and line regulation 0.05% typ. and very low output

LP2951 Versions Only

temperature coefficient, making the LP2950/LP2951 useful

∙ Error Flag Warns of Output Dropout

as a low-power voltage reference.

∙ Logic-Controlled Electronic Shutdown

The error flag output feature is used as power-on reset for

∙ Output Programmable from 1.24 to 29V

warning of a low output voltage, due to falling voltage input of

APPLICATIONS

batteries. Another feature is the logic-compatible shutdown

input which enables the regulator to be switched on and off.

∙ Battery Powered Systems

The LP2950 is offered in a 3-pin TO-92 package compatible

∙ Cordless Telephones

with other 5V, 3.0V, 3.3V regulators. The LP2951 is also available

∙ Radio Control Systems

in 8-pin plastic and SO-8.

∙ Portable / Palm Top / Notebook Computers

The regulator output voltage may be pin-strapped for 5V, 3V

∙ Portable Consumer Equipment

or 3.3 volts or programmed from 1.24 volt to 29 volts with an

∙ Portable Instrumentation

external pair of resistors. Use of AS’s design, processing and

∙ Avionics

testing techniques make our LP2950 and LP2951 superior

∙ SMPS Post-Regulator

over similar products.

∙ Voltage Reference

∙ Automotive Electronics

ORDERING INFORMATION

PART

PACKAGE

TEMPERATURE RANGE

LP2950ACN-X

TO-92 (3-Pin)

IND.

LP2950CN-X

TO-92 (3-Pin)

IND.

LP2951ACP-X

Plastic DIP (8-Pin)

IND.

LP2951CP-X

Plastic DIP (8-Pin)

IND.

LP2951ACS-X

Plastic SOIC (8-Pin)

IND.

LP2951CS-X

Plastic SOIC (8-Pin)

IND.

X = 3.0V, 3.3V or 5.0V

PIN CONNECTIONS

8-PIN SURFACE MOUNT

TO-92

INPUT

OUTPUT

1

8

1

2

3

1. OUTPUT

FEEDBACK

2. GROUND

SENSE

2

7

3. INPUT

LP2951

5V OR 3.3V TAP

SHUTDOWN

3

6

GROUND

4

5

ERROR

BOTTOM VIEW

1D-20

TOP VIEW

1D-19

CALOGIC CORPORATION, 237 Whitney Place, Fremont, California 94539, Telephone: [phone], FAX: [phone]

LP2950 / LP2951

CORPORATION

ABSOLUTE MAXIMUM RATINGS

Power Dissipation . . . . . . . . . . . . . . . . . . . . . Internally Limited Lead Temp. (Soldering, 5 Seconds) . . . . . . . . . . . . . . . 260oC Storage Temperature Range . . . . . . . . . . . . . . . -65 to +150oC

Operating Junction Temperature Range

LP2951. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -55 to +150oC LP2950AC/LP2950C

LP2951AC/LP2951C . . . . . . . . . . . . . . . . . . . -40 to +125oC

Input Supply Voltage . . . . . . . . . . . . . . . . . . . . . . -0.3 to +30V 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: VS = 15V, TA = 25oC, unless otherwise specified.

PARAMETER		LP2951		LP2950AC / LP2951AC				LP2950C / LP2951C					UNITS	CONDITIONS
	MIN	TYP	MAX	MIN	TYP		MAX	MIN		TYP		MAX		(Note 2)
3V VERSIONS
	2.985	3.0	3.015	2.985	3.0		3.015	2.970		3.0		3.030	V	TJ = 25oC
Output Voltage				2.970	3.0		3.030	2.955		3.0		3.045	V	-25oC ≤ TJ ≤ 85oC
	2.964		3.036	2.964	3.0		3.036	2.940		3.0		3.060	V	Full Operating Temperature
Output Voltage	2.955	3.0	3.045	2.958	3.0		3.042	2.928		3.0		3.072	V	100μA ≤ IL ≤ 100mA
														TJ ≤TJMAX
3.3V VERSIONS
	3.284	3.3	3.317	3.284	3.3		3.317	3.267		3.3		3.333	V	TJ = 25oC
Output Voltage				3.267	3.3		3.333	3.251		3.3		3.350	V	-25oC ≤ TJ ≤ 85oC
	3.260		3.340	3.260	3.3		3.340	3.234		3.3		3.366	V	Full Operating Temperature
Output Voltage	3.251	3.3	3.350	3.254	3.3		3.346	3.221		3.3		3.379	V	100μA ≤ IL ≤ 100mA
														TJ ≤TJMAX
5V VERSIONS
	4.975	5.0	5.025	4.975	5.0		5.025	4.95		5.0		5.05	V	TJ = 25oC
Output Voltage				4.95	5.0		5.050	4.925		5.0		5.075	V	-25oC ≤ TJ ≤ 85oC
	4.94		5.06	4.94	5.0		5.06	4.90		5.0		5.10	V	Full Operating Temperature
Output Voltage	4.925	5.0	5.075	4.93	5.0		5.07	4.88		5.0		5.12	V	100μA ≤ IL ≤ 100mA
														TJ ≤ TJMAX
ALL VOLTAGE OPTIONS
Output Voltage		20	120		20					50			ppm/oC	(Note 1)
Temperature Coefficient
Line Regulation (Note 3)		0.03	0.1		0.03		0.1			0.04		0.2	%	6V ≤ VIN ≤ 30V (Note 4)
Load Regulation (Note 3)		0.04	0.1		0.04		0.1			0.1		0.2	%	100μA ≤ IL ≤ 100mA
Dropout Voltage		50	80		50		80			50		80	mV	IL = 100μA
(Note 5)		380	450		380		450			380		450	mV	IL = 100mA
Ground Current		150	170		150		170			150		170	μA	IL = 100μA
		8	12		8		12			8		12	mA	IL = 100mA
Current Limit		130	200		130		200			130		200	mA	VOUT = 0
Thermal Regulation		0.05	0.2		0.05		0.2			0.05		0.2	%/W
		430			430					430			μVrms	CL = 1μF
Output Noise,		160			160					160				CL = 200μF
													μVrms
10Hz to 100KHz		100			100					100				CL = 13.3μF
													μVrms
														(Bypass = 0.01μF pins 7 to 1 (LP2951))
8-PIN VERSIONS ONLY		LP2951		LP2951AC					LP2951C
Reference Voltage	1.22	1.235	1.25	1.22	1.235		1.25	1.21		1.235		1.26	V
Reference Voltage	1.19		1.27	1.19			1.27	1.185				1.285	V	Over Temperature (Note 6)
Feedback Pin Bias Current		40	60		40		60			40		60	nA
Reference Voltage		20			20					50			ppm/oC	(Note 7)
Temperature Coefficient
Feedback Pin Bias Current		0.1			0.1					0.1			nA/oC
Temperature Coefficient

CALOGIC CORPORATION, 237 Whitney Place, Fremont, California 94539, Telephone: [phone], FAX: [phone]

LP2950 / LP2951

CORPORATION

ELECTRICAL CHARACTERISTICS (continued)

	PARAMETER		LP2951		LP2950AC / LP2951AC			LP2950C / LP2951C			UNITS	CONDITIONS
		MIN	TYP	MAX	MIN	TYP	MAX	MIN	TYP	MAX		(Note 2)
	ERROR COMPARATOR
	Output Leakage Current		0.01	1		0.01	1		0.01	1	mA	VOH = 30V
	Output Low Voltage		150	250		150	250		150	250	mV	VIN = 4.5V, IOL = 400mA
	Upper Threshold Voltage	40	60		40	60		40	60		mV	(Note 7)
	Lower Threshold Voltage		75	95		75	95		75	95	mV	(Note 7)
	Hysteresis		15			15			15		mV	(Note 7)
	SHUTDOWN INPUT
	Input Logic Voltage		1.3	0.6		1.3	0.7		1.3	0.7	V	Low (Regulator ON)
		2			2			2			V	High (Regulator OFF)
	Shutdown Pin		30	50		30	50		30	50	mA	VS = 2.4V
	Input Current		675	800		675	800		675	800	mA	VS = 30V
	Regulator Output Current		3	10		3	10		3	10	mA	(Note 9)
	in Shutdown

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 guaranteed for TJ = 25oC, VIN = 6V, IL=100mA and CL = 1mF. 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 LP2951 is tested at 150oC for IL = 1mA. For IL = 100mA and TJ = 125oC, 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 100mV 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 input account.

Note 6: VREF £ VOUT £ (VIN - 1V), 2.3 £ VIN £ 30V, 100mA £ IL £ 100mA, 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 95mV x 5V/1.235 = 384mV. 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 ³ 2V, VIN £ 30V, VOUT = 0, Feedback pin tied to 5V Tap. Note 9: All typical values are not guaranteed.

BLOCK DIAGRAM
	UNREGULATED DC
	7	8	1		5V @ 100mA
					MAX
	+
	FEEDBACK	INPUT	OUTPUT
				2
				SENSE
		+	180k Ω
		–		6
			ERROR
	3
FROM			AMPLIFIER	5V TAP	330k Ω
CMOS	SHUTDOWN				+
OR TTL			60kΩ	5
	+				1μF
		+
	60mV			ERROR
		–	ERROR DETECTION
					TO CMOS OR
	+	1.23V	COMPARATOR
				4	TTL
		REFERENCE		GROUND
	LP2950 AND LP2951 BLOCK DIAGRAM				1D-21
CALOGIC CORPORATION, 237 Whitney Place, Fremont, California 94539, Telephone: [phone], FAX: [phone]