NSC LP2992IM5-3.3, LP2992IM5-3.0, LP2992IM5-2.5, LP2992IM5-1.8, LP2992ILDX-5.0 Datasheet
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June 2002
LP2992
Micropower 250 mA Low-Noise Ultra Low-Dropout Regulator in SOT-23 and LLP Packages
Designed for Use with Very Low ESR Output Capacitors
General Description
The LP2992 is a 250 mA, fixed-output voltage regulator designed to provide ultra low-dropout and low noise in battery powered applications.
Using an optimized VIP™ (Vertically Integrated PNP) process, the LP2992 delivers unequalled performance in all specifications critical to battery-powered designs:
Dropout Voltage: Typically 450 mV @ 250 mA load, and 5 mV @ 1 mA load.
Ground Pin Current: Typically 1500 µA @ 250 mA load, and 75 µA @ 1 mA load.
Enhanced Stability: The LP2992 is stable with output capacitor ESR as low as 5 mΩ, which allows the use of ceramic capacitors on the output.
Sleep Mode: Less than 1 µA quiescent current when ON/OFF pin is pulled low.
Smallest Possible Size: SOT-23 and LLP packages use absolute minimum board space.
Precision Output: 1% tolerance output voltages available (A grade).
Low Noise: By adding a 10 nF bypass capacitor, output noise can be reduced to 30 µV (typical).
Multiple voltage options, from 1.5V to 5.0V, are available as standard products. Consult factory for custom voltages.
Features
nUltra low dropout voltage
nGuaranteed 250 mA output current
nSmallest possible size (SOT-23, LLP package)
nRequires minimum external components
nStable with low-ESR output capacitor
n<1 µA quiescent current when shut down
nLow ground pin current at all loads
nOutput voltage accuracy 1% (A Grade)
nHigh peak current capability
nWide supply voltage range (16V max)
nLow ZOUT: 0.3Ω typical (10 Hz to 1 MHz)
nOvertemperature/overcurrent protection
n−40˚C to +125˚C junction temperature range
nCustom voltages available
Applications
nCellular Phone
nPalmtop/Laptop Computer
nPersonal Digital Assistant (PDA)
nCamcorder, Personal Stereo, Camera
Block Diagram
20029401
VIP™ is a trademark of National Semiconductor Corporation.
LLP and 23-SOT in Regulator Dropout-Low Ultra Noise-Low mA 250 Micropower LP2992
Packages
© 2002 National Semiconductor Corporation |
DS200294 |
www.national.com |
LP2992
Basic Application Circuit
20029402
*ON/OFF input must be actively terminated. Tie to VIN if this function is not to be used.
**Minimum capacitance is shown to ensure stability (may be increased without limit). Ceramic capacitor required for output (see Application Hints).
***Reduces output noise (may be omitted if application is not noise critical). Use ceramic or film type with very low leakage current (see Application Hints).
Connection Diagrams
5-Lead Small Outline Package (M5) |
6-Lead LLP Package (LD) |
20029403 |
20029446 |
Top View |
Top View |
See NS Package Number MF05A |
See NS Package Number NLDBA006 |
For ordering information see Table 1 |
Outline Drawing LDE06A |
www.national.com |
2 |
Ordering Information
TABLE 1. Package Marking and Ordering Information
Output Voltage |
Grade |
Order Information |
Package |
Supplied as: |
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(V) |
Marking |
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5-Lead Small Outline Package (M5) |
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1.5 |
A |
LP2992AIM5X-1.5 |
LFBA |
3000 Units on Tape and Reel |
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1.5 |
A |
LP2992AIM5-1.5 |
LFBA |
1000 Units on Tape and Reel |
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1.5 |
STD |
LP2992IM5X-1.5 |
LFBB |
3000 Units on Tape and Reel |
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1.5 |
STD |
LP2992IM5-1.5 |
LFBB |
1000 Units on Tape and Reel |
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1.8 |
A |
LP2992AIM5X-1.8 |
LFCA |
3000 Units on Tape and Reel |
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1.8 |
A |
LP2992AIM5-1.8 |
LFCA |
1000 Units on Tape and Reel |
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1.8 |
STD |
LP2992IM5X-1.8 |
LFCB |
3000 Units on Tape and Reel |
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1.8 |
STD |
LP2992IM5-1.8 |
LFCB |
1000 Units on Tape and Reel |
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2.5 |
A |
LP2992AIM5X-2.5 |
LFDA |
3000 Units on Tape and Reel |
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2.5 |
A |
LP2992AIM5-2.5 |
LFDA |
1000 Units on Tape and Reel |
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2.5 |
STD |
LP2992IM5X-2.5 |
LFDB |
3000 Units on Tape and Reel |
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2.5 |
STD |
LP2992IM5-2.5 |
LFDB |
1000 Units on Tape and Reel |
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3.0 |
A |
LP2992AIM5X-3.0 |
LF8A |
3000 Units on Tape and Reel |
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3.0 |
A |
LP2992AIM5-3.0 |
LF8A |
1000 Units on Tape and Reel |
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3.0 |
STD |
LP2992IM5X-3.0 |
LF8B |
3000 Units on Tape and Reel |
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3.0 |
STD |
LP2992IM5-3.0 |
LF8B |
1000 Units on Tape and Reel |
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3.3 |
A |
LP2992AIM5X-3.3 |
LFEA |
3000 Units on Tape and Reel |
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3.3 |
A |
LP2992AIM5-3.3 |
LFEA |
1000 Units on Tape and Reel |
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3.3 |
STD |
LP2992IM5X-3.3 |
LFEB |
3000 Units on Tape and Reel |
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3.3 |
STD |
LP2992IM5-3.3 |
LFEB |
1000 Units on Tape and Reel |
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5.0 |
A |
LP2992AIM5X-5.0 |
LFFA |
3000 Units on Tape and Reel |
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5.0 |
A |
LP2992AIM5-5.0 |
LFFA |
1000 Units on Tape and Reel |
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5.0 |
STD |
LP2992IM5X-5.0 |
LFFB |
3000 Units on Tape and Reel |
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5.0 |
STD |
LP2992IM5-5.0 |
LFFB |
1000 Units on Tape and Reel |
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6-Lead LLP Package (LDE06A) |
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1.5 |
A |
LP2992AILDX-1.5 |
L011A |
4500 Units on Tape and Reel |
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1.5 |
A |
LP2992AILD-1.5 |
L011A |
1000 Units on Tape and Reel |
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1.5 |
STD |
LP2992ILDX-1.5 |
L011AB |
4500 Units on Tape and Reel |
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1.5 |
STD |
LP2992ILD-1.5 |
L011AB |
1000 Units on Tape and Reel |
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1.8 |
A |
LP2992AILDX-1.8 |
L012A |
4500 Units on Tape and Reel |
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1.8 |
A |
LP2992AILD-1.8 |
L012A |
1000 Units on Tape and Reel |
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1.8 |
STD |
LP2992ILDX-1.8 |
L012AB |
4500 Units on Tape and Reel |
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1.8 |
STD |
LP2992ILD-1.8 |
L012AB |
1000 Units on Tape and Reel |
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2.5 |
A |
LP2992AILDX-2.5 |
L013A |
4500 Units on Tape and Reel |
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2.5 |
A |
LP2992AILD-2.5 |
L013A |
1000 Units on Tape and Reel |
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2.5 |
STD |
LP2992ILDX-2.5 |
L013AB |
4500 Units on Tape and Reel |
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2.5 |
STD |
LP2992ILD-2.5 |
L013AB |
1000 Units on Tape and Reel |
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3.3 |
A |
LP2992AILDX-3.3 |
L014A |
4500 Units on Tape and Reel |
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3.3 |
A |
LP2992AILD-3.3 |
L014A |
1000 Units on Tape and Reel |
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3.3 |
STD |
LP2992ILDX-3.3 |
L014AB |
4500 Units on Tape and Reel |
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3.3 |
STD |
LP2992ILD-3.3 |
L014AB |
1000 Units on Tape and Reel |
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5.0 |
A |
LP2992AILDX-5.0 |
L015A |
4500 Units on Tape and Reel |
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5.0 |
A |
LP2992AILD-5.0 |
L015A |
1000 Units on Tape and Reel |
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5.0 |
STD |
LP2992ILDX-5.0 |
L015AB |
4500 Units on Tape and Reel |
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5.0 |
STD |
LP2992ILD-5.0 |
L015AB |
1000 Units on Tape and Reel |
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LP2992
3 |
www.national.com |
LP2992
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 |
−65˚C to +150˚C |
Operating Junction Temperature |
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Range |
−40˚C to +125˚C |
Lead Temp. (Soldering, 5 sec.) |
260˚C |
ESD Rating (Note 2) |
2 kV |
Power Dissipation (Note 3) |
Internally Limited |
Input Supply Voltage (Survival) |
−0.3V to +16V |
Input Supply Voltage (Operating) |
2.2V to +16V |
Shutdown Input Voltage (Survival) |
−0.3V to +16V |
Output Voltage (Survival, (Note 4)) |
−0.3V to +9V |
IOUT (Survival) |
Short Circuit |
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Protected |
Input-Output Voltage (Survival, |
−0.3V to +16V |
(Note 5)) |
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Electrical Characteristics
Limits in standard typeface are for TJ = 25˚C. 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.
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LP2992AI-X.X |
LP2992I-X.X |
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Symbol |
Parameter |
Conditions |
Typ |
(Note 6) |
(Note 6) |
Units |
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Min |
Max |
Min |
Max |
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∆VO |
Output Voltage |
IL = 1 mA |
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−1.0 |
1.0 |
−1.5 |
1.5 |
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Tolerance |
1 mA ≤ IL ≤ 50 mA |
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−1.5 |
1.5 |
−2.5 |
2.5 |
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−2.5 |
2.5 |
−3.5 |
3.5 |
%VNOM |
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1 mA ≤ IL ≤ 250 mA |
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−3.5 |
3.5 |
−4.0 |
4.0 |
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−4.5 |
4.5 |
−5.0 |
5.0 |
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Output Voltage |
VO(NOM)+1V ≤ VIN ≤ 16V |
0.007 |
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0.014 |
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0.014 |
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%/V |
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Line Regulation |
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0.032 |
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0.032 |
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VIN(min) |
Minimum input voltage |
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2.05 |
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2.20 |
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2.20 |
V |
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required to maintain |
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outpout regulation |
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VIN–VO |
Dropout Voltage |
IL = 0 |
0.5 |
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2.5 |
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2.5 |
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(Note 7) |
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4 |
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4 |
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IL = 1 mA |
5 |
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9 |
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9 |
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12 |
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12 |
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IL = 50 mA |
100 |
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125 |
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125 |
mV |
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180 |
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180 |
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IL = 150 mA |
260 |
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325 |
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325 |
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470 |
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470 |
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IL = 250 mA |
450 |
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575 |
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575 |
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850 |
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850 |
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IGND |
Ground Pin Current |
IL = 0 |
65 |
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95 |
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95 |
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125 |
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125 |
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IL = 1 mA |
75 |
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110 |
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110 |
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170 |
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170 |
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IL = 50 mA |
350 |
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600 |
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600 |
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1000 |
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1000 |
µA |
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IL = 150 mA |
850 |
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1500 |
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1500 |
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2500 |
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2500 |
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IL = 250 mA |
1500 |
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2300 |
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2300 |
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4000 |
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4000 |
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VON/OFF < 0.3V |
0.01 |
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0.8 |
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0.8 |
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VON/OFF < 0.15V |
0.05 |
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2 |
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2 |
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VON/OFF |
ON/OFF Input Voltage |
High = O/P ON |
1.4 |
1.6 |
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1.6 |
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V |
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(Note 8) |
Low = O/P OFF |
0.55 |
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0.15 |
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0.15 |
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www.national.com |
4 |
Electrical Characteristics (Continued)
Limits in standard typeface are for TJ = 25˚C. 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.
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LP2992AI-X.X |
LP2992I-X.X |
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Symbol |
Parameter |
Conditions |
Typ |
(Note 6) |
(Note 6) |
Units |
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Min |
Max |
Min |
Max |
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ION/OFF |
ON/OFF Input Current |
VON/OFF = 0 |
0.01 |
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−2 |
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−2 |
µA |
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VON/OFF = 5V |
5 |
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15 |
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15 |
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en |
Output Noise |
BW = 300 Hz to 50 kHz, |
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Voltage (RMS) |
COUT = 10 µF |
30 |
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µV |
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CBYPASS = 10 nF |
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Ripple Rejection |
f = 1 kHz, CBYPASS = 10 nF |
45 |
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dB |
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COUT = 10 µF |
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IO(SC) |
Short Circuit Current |
RL = 0 (Steady State) |
400 |
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mA |
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(Note 9) |
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IO(PK) |
Peak Output Current |
VOUT ≥ Vo(NOM) −5% |
350 |
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mA |
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 for the SOT-23 package, or pins 1 and 3 for the LLP package, 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, θJ-A, and the ambient temperature, TA. The maximum allowable power dissipation at any ambient temperture is calculated using:
Where the value of θJ-A for the SOT-23 package is 220˚C/W in a typical PC board mounting and the LLP package is 65˚C/W. Exceeding the maximum allowable 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 LP2992 output must be diode-clamped to ground.
Note 5: The output PNP structure contains a diode between the VIN to VOUT terminals that is normally reverse-biased. Reversing the polarity from VIN to VOUT will turn on this diode.
Note 6: Limits are 100% production tested at 25˚C. Limits over the operating 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: VIN must be the greater of 2.2V or VOUT(nom) + Dropout Voltage to maintain output regulation. Dropout voltage is defined as the input to output differential at which the output voltage drops 2% below the value measured with a 1V differential.
Note 8: The ON/OFF input must be properly driven to prevent possible misoperation. For details, refer to Application Hints.
Note 9: The LP2992 has foldback current limiting which allows a high peak current when VOUT > 0.5V, and then reduces the maximum output current as VOUT is forced to ground (see Typical Performance Characteristics curves).
LP2992
5 |
www.national.com |
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