NSC LP2982AIM5-2.5, LP2982AIBPX-2.8, LP2982AIBP-3.0, LP2982AIBP-2.8, LP2982IM5X-5.0 Datasheet

March 2000

LP2982

Micropower 50 mA Ultra Low-Dropout Regulator

General Description

The LP2982 is a 50 mA, fixed-output voltage regulator designed to provide ultra low dropout and lower noise in battery powered applications.

Using an optimized VIP™ (Vertically Integrated PNP) process, the LP2982 delivers unequaled performance in all specifications critical to battery-powered designs:

Dropout Voltage: Typically 120 mV @ 50 mA load, and 7 mV @ 1 mA load.

Ground Pin Current: Typically 375 µA @ 50 mA load, and 80 µA @ 1 mA load.

Sleep Mode: Less than 1 µA quiescent current when on/off pin is pulled low.

Smallest Possible Size: SOT-23 and micro SMD packages use absolute minimum board space.

Precision Output: 1.0% tolerance output voltages available (A grade).

Low Noise: By adding an external bypass capacitor, output noise can be reduced to 30 µV (typical).

Ten output voltage versions, from 2.5V to 5.0V, are available as standard products.

Features

nUltra low dropout voltage

nGuaranteed 50 mA output current

nTypical dropout voltage 180 mV @ 80 mA

nSmallest possible size (SOT-23, micro SMD package)

nRequires minimum external components

n< 1 µA quiescent current when shutdown

nLow ground pin current at all loads

nOutput voltage accuracy 1.0% (A Grade)

nHigh peak current capability (150 mA typical)

nWide supply voltage range (16V max)

nLow ZOUT 0.3Ω typical (10 Hz to 1 MHz)

nOvertemperature/overcurrent protection

n−40ÊC to +125ÊC junction temperature range

nCustom voltages available

Applications

nCellular Phone

nPalmtop/Laptop Computer

nPersonal Digital Assistant (PDA)

nCamcorder, Personal Stereo, Camera

Block Diagram

DS012679-1

VIP™ is a trademark of National Semiconductor Corporation.

Regulator Dropout-Low Ultra mA 50 Micropower LP2982

© 2000 National Semiconductor Corporation

DS012679

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LP2982

Connection Diagrams

5-Lead Small Outline Package (M5)

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Top View

See NS Package Number MF05A For ordering information see Table 1

Basic Application Circuit

micro SMD, 5 Bump Package (BPA05)

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Bottom View

See NS Package Number BPA05

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*ON/OFF input must be actively terminated. Tie to VIN if this function is not to be used.

**Minimum capacitance is shown to insure stability over full load current range. More capacitance provides superior dynamic performance (see Application Hints).

***See Application Hints.

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Ordering Information

TABLE 1. Package Marking and Ordering Information

Output Voltage			Package
(V)	Grade	Order Information	Marking	Supplied as:
5-Lead Small Outline Package (M5)
2.5	A	LP2982AIM5X-2.5	L58A	3000 Units on Tape and Reel
2.5	A	LP2982AIM5-2.5	L58A	1000 Units on Tape and Reel
2.5	STD	LP2982IM5X-2.5	L58B	3000 Units on Tape and Reel
2.5	STD	LP2982IM5-2.5	L58B	1000Units on Tape and Reel
2.6	A	LP2982AIM5X-2.6	LBYA	3000 Units on Tape and Reel
2.6	A	LP2982AIM5-2.6	LBYA	1000 Units on Tape and Reel
2.6	STD	LP2982IM5X-2.6	LBYB	3000 Units on Tape and Reel
2.6	STD	LP2982IM5-2.6	LBYB	1000Units on Tape and Reel
2.8	A	LP2982AIM5X-2.8	L60A	3000 Units on Tape and Reel
2.8	A	LP2982AIM5-2.8	L60A	1000 Units on Tape and Reel
2.8	STD	LP2982IM5X-2.8	L60B	3000 Units on Tape and Reel
2.8	STD	LP2982IM5-2.8	L60B	1000 Units on Tape and Reel
3.0	A	LP2982AIM5X-3.0	L20A	3000 Units on Tape and Reel
3.0	A	LP2982AIM5-3.0	L20A	1000 Units on Tape and Reel
3.0	STD	LP2982IM5X-3.0	L20B	3000 Units on Tape and Reel
3.0	STD	LP2982IM5-3.0	L20B	1000 Units on Tape and Reel
3.3	A	LP2982AIM5X-3.3	L19A	3000 Units on Tape and Reel
3.3	A	LP2982AIM5-3.3	L19A	1000 Units on Tape and Reel
3.3	STD	LP2982IM5X-3.3	L19B	3000 Units on Tape and Reel
3.3	STD	LP2982IM5-3.3	L19B	1000 Units on Tape and Reel
3.6	A	LP2982AIM5X-3.6	L0BA	3000 Units on Tape and Reel
3.6	A	LP2982AIM5-3.6	L0BA	1000 Units on Tape and Reel
3.6	STD	LP2982IM5X-3.6	L0BB	3000 Units on Tape and Reel
3.6	STD	LP2982IM5-3.6	L0BB	1000 Units on Tape and Reel
3.8	A	LP2982AIM5X-3.8	L76A	3000 Units on Tape and Reel
3.8	A	LP2982AIM5-3.8	L76A	1000 Units on Tape and Reel
3.8	STD	LP2982IM5X-3.8	L76B	3000 Units on Tape and Reel
3.8	STD	LP2982IM5-3.8	L76B	1000 Units on Tape and Reel
4.0	A	LP2982AIM5X-4.0	L29A	3000 Units on Tape and Reel
4.0	A	LP2982AIM5-4.0	L29A	1000 Units on Tape and Reel
4.0	STD	LP2982IM5X-4.0	L29B	3000 Units on Tape and Reel
4.0	STD	LP2982IM5-4.0	L29B	1000 Units on Tape and Reel
4.5	A	LP2982AIM5X-4.5	LA8A	3000 Units on Tape and Reel
4.5	A	LP2982AIM5-4.5	LA8A	1000 Units on Tape and Reel
4.5	STD	LP2982IM5X-4.5	LA8B	3000 Units on Tape and Reel
4.5	STD	LP2982IM5-4.5	LA8B	1000 Units on Tape and Reel
4.7	A	LP2982AIM5X-4.7	L0HA	3000 Units on Tape and Reel
4.7	A	LP2982AIM5-4.7	L0HA	1000 Units on Tape and Reel
4.7	STD	LP2982IM5X-4.7	L0HB	3000 Units on Tape and Reel
4.7	STD	LP2982IM5-4.7	L0HB	1000 Units on Tape and Reel
5.0	A	LP2982AIM5X-5.0	L18A	3000 Units on Tape and Reel
5.0	A	LP2982AIM5-5.0	L18A	1000 Units on Tape and Reel
5.0	STD	LP2982IM5X-5.0	L18B	3000 Units on Tape and Reel
5.0	STD	LP2982IM5-5.0	L18B	1000 Units on Tape and Reel
5.3	A	LP2982AIM5X-5.3	LBZA	3000 Units on Tape and Reel

LP2982

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LP2982

Ordering Information (Continued)

TABLE 1. Package Marking and Ordering Information (Continued)

Output Voltage			Package
(V)	Grade	Order Information	Marking	Supplied as:
5-Lead Small Outline Package (M5)
5.3	A	LP2982AIM5-5.3	LBZA	1000 Units on Tape and Reel
5.3	STD	LP2982IM5X-5.3	LBZB	3000 Units on Tape and Reel
5.3	STD	LP2982IM5-5.3	LBZB	1000 Units on Tape and Reel
micro SMD, 5 Bump Package (BPA05)
2.8	A	LP2982AIBP-2.8		250 Units on Tape and Reel
2.8	A	LP2982AIBPX-2.8		3000 Units on Tape and Reel
2.8	STD	LP2982IBP-2.8		250 Units on Tape and Reel
2.8	STD	LP2982IBPX-2.8		3000 Units on Tape and Reel
3.0	A	LP2982AIBP-3.0		250 Units on Tape and Reel
3.0	A	LP2982AIBPX-3.0		3000 Units on Tape and Reel
3.0	STD	LP2982IBP-3.0		250 Units on Tape and Reel
3.0	STD	LP2982IBPX-3.0		3000 Units on Tape and Reel

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Absolute Maximum Ratings (Note 1)

If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications.

Storage Temperature Range	−65ÊC to +150ÊC
Operating Junction Temperature Range	−40ÊC to +125ÊC
Lead Temperature (Soldering, 5 sec.)	260ÊC
ESD Rating (Note 2)	2 kV

Power Dissipation (Note 3)		Internally Limited
Input Supply Voltage (Survival)		−0.3V to +16V
Input Supply Voltage (Operating)		2.1V to +16V
Shutdown Input Voltage (Survival)		−0.3V to +16V
Output Voltage (Survival, (Note 4))		−0.3V to +9V
IOUT (Survival)	Short Circuit Protected
Input-Output Voltage (Survival, (Note 5))		−0.3V to +16V

Electrical Characteristics

Limits in standard typeface are for TJ = 25ÊC, and limits in boldface type apply over the full operating temperature range. Unless otherwise specified: VIN = VO(NOM) + 1V, IL = 1 mA, CIN = 1 µF, COUT = 4.7 µF, VON/OFF = 2V.

Symbol	Parameter	Conditions	Typ	LP2982AI-X.X		LP2982I-X.X		Units
				(Note 6)		(Note 6)
				Min	Max	Min	Max
DVO	Output Voltage	IL = 1 mA		−1.0	+1.0	−1.5	+1.5
	Tolerance
								%VNOM
		1 mA < IL < 50 mA		−1.5	+1.5	−2.0	+2.0
				−2.0	+2.0	−3.5	+3.5
	Output Voltage Line	VO(NOM) + 1V £ VIN £ 16V	0.007		0.014		0.014	%/V
	Regulation				0.032		0.032
VIN±VO	Dropout Voltage	IL = 0	1		3		3
	(Note 7)				5		5
		IL = 1 mA	7		10		10
					15		15	mV
		IL = 10 mA	40		60		60
					90		90
		IL = 50 mA	120		150		150
					225		225
IGND	Ground Pin Current	IL = 0	65		95		95
					125		125
		IL = 1 mA	80		110		110
					170		170
		IL = 10 mA	140		220		220	µA
					460		460
		IL = 50 mA	375		600		600
					1200		1200
		VON/OFF < 0.3V	0.01		0.8		0.8
		VON/OFF < 0.15V	0.10		2.0		2.0
VON/OFF	ON/OFF Input Voltage	High = O/P ON	1.4	1.6		1.6		V
	(Note 8)	Low = O/P OFF	0.55		0.15		0.15
ION/OFF	ON/OFF Input Current	VON/OFF = 0	0.01		−2		−2	µA
		VON/OFF = 5V	5		15		15
IO(PK)	Peak Output Current	VOUT ³ VO(NOM) − 5%	150	100		100		mA
VIN±VO	Dropout Voltage	IL = 80 mA	180		225		225	mV
					325		325
IGND	Ground Pin Current	IL = 80 mA	525		750		750	µA
					1400		1400
en	Output Noise Voltage	BW = 300 Hz±50 kHz,						µV
	(RMS)	COUT = 10 µF	30
		CBYPASS = 0.01 µF

LP2982

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LP2982

Electrical Characteristics (Continued)

Limits in standard typeface are for TJ = 25ÊC, and limits in boldface type apply over the full operating temperature range. Unless otherwise specified: VIN = VO(NOM) + 1V, IL = 1 mA, CIN = 1 µF, COUT = 4.7 µF, VON/OFF = 2V.

Symbol	Parameter	Conditions	Typ	LP2982AI-X.X		LP2982I-X.X		Units
				(Note 6)		(Note 6)
				Min	Max	Min	Max
	Ripple Rejection	f = 1 kHz	45					dB
		COUT = 10 µF
IO(MAX)	Short Circuit Current	RL = 0 (Steady State)	150					mA
		(Note 9)

Note 1: Absolute maximum ratings indicate limits beyond which damage to the component may occur. Electrical specifications do not apply when operating the device outside of its rated operating conditions.

Note 2: The ESD rating of pins 3 and 4 is 1 kV.

Note 3: The maximum allowable power dissipation is a function of the maximum junction temperature, TJ(MAX), the junction-to-ambient thermal resistance, θJA, and the ambient temperature, TA. The maximum allowable power dissipation at any ambient temperature is calculated using:

The value of θJA for the SOT-23 package is 220ÊC/W and the micro SMD package is 320ÊC/W. Exceeding the maximum allowable power dissipation will cause excessive die temperature, and the regulator will go into thermal shutdown.

Note 4: If used in a dual-supply system where the regulator load is returned to a negative supply, the LP2982 output must be diode-clamped to ground.

Note 5: The output PNP structure contains a diode between the VIN and VOUT terminals that is normally reverse-biased. Reversing the polarity from VIN to VOUT will turn on this diode.

Note 6: temperature range are guaranteed through correlation using Statistical Quality Control (SQC) methods. The limits are used to calculate National's Average Outgoing Quality Level (AOQL).

Note 7: Dropout voltage is defined as the input to output differential at which the output voltage drops 100 mV below the value measured with a 1V differential.

Note 8: The ON/OFF inputs must be properly driven to prevent possible misoperation. For details, refer to Application Hints.

Note 9: See Typical Performance Characteristics curves.

Typical Performance Characteristics Unless otherwise specified: TA = 25ÊC, VIN = VO(NOM) + 1V, COUT = 4.7 µF, CIN = 1 µF, all voltage options, ON/OFF pin tied to VIN.

Output Voltage vs	Output Voltage vs
Temperature	Temperature

DS012679-4

DS012679-5

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