LP2992IM5X-1.5 National Semiconductor, LP2992IM5X-1.5 Datasheet

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LP2992IM5X-1.5

Manufacturer Part Number
LP2992IM5X-1.5
Description
Micropower 250 mA Low-Noise Ultra Low-Dropout Regulator in SOT-23 and LLP Packages Designed for Use with Very Low ESR Output Capacitors
Manufacturer
National Semiconductor
Datasheet

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© 2002 National Semiconductor Corporation
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 bat-
tery powered applications.
Using an optimized VIP
cess, the LP2992 delivers unequalled performance in all
specifications critical to battery-powered designs:
Dropout Voltage: Typically 450 mV
5 mV
Ground Pin Current: Typically 1500 µA
75 µA
Enhanced Stability: The LP2992 is stable with output ca-
pacitor 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.
Block Diagram
VIP
is a trademark of National Semiconductor Corporation.
@
@
1 mA load.
1 mA load.
(Vertically Integrated PNP) pro-
@
DS200294
@
250 mA load, and
250 mA load, and
Features
n Ultra low dropout voltage
n Guaranteed 250 mA output current
n Smallest possible size (SOT-23, LLP package)
n Requires minimum external components
n Stable with low-ESR output capacitor
n
n Low ground pin current at all loads
n Output voltage accuracy 1% (A Grade)
n High peak current capability
n Wide supply voltage range (16V max)
n Low Z
n Overtemperature/overcurrent protection
n −40˚C to +125˚C junction temperature range
n Custom voltages available
Applications
n Cellular Phone
n Palmtop/Laptop Computer
n Personal Digital Assistant (PDA)
n Camcorder, Personal Stereo, Camera
<
1 µA quiescent current when shut down
OUT
: 0.3Ω typical (10 Hz to 1 MHz)
20029401
www.national.com
June 2002

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LP2992IM5X-1.5 Summary of contents

Page 1

... Multiple voltage options, from 1.5V to 5.0V, are available as standard products. Consult factory for custom voltages. Block Diagram VIP ™ trademark of National Semiconductor Corporation. © 2002 National Semiconductor Corporation Features n Ultra low dropout voltage n Guaranteed 250 mA output current n Smallest possible size (SOT-23, LLP package) ...

Page 2

Basic Application Circuit *ON/OFF input must be actively terminated. Tie to V **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 ...

Page 3

... A 3.3 STD 3.3 STD 5.0 A 5.0 A 5.0 STD 5.0 STD Package Order Information Marking LP2992AIM5X-1.5 LFBA LP2992AIM5-1.5 LFBA LP2992IM5X-1.5 LFBB LP2992IM5-1.5 LFBB LP2992AIM5X-1.8 LFCA LP2992AIM5-1.8 LFCA LP2992IM5X-1.8 LFCB LP2992IM5-1.8 LFCB LP2992AIM5X-2.5 LFDA LP2992AIM5-2.5 LFDA LP2992IM5X-2.5 LFDB LP2992IM5-2.5 LFDB LP2992AIM5X-3.0 LF8A LP2992AIM5-3 ...

Page 4

... Absolute Maximum Ratings If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. Storage Temperature Range Operating Junction Temperature Range Lead Temp. (Soldering, 5 sec.) ESD Rating (Note 2) Power Dissipation (Note 3) Electrical Characteristics Limits in standard typeface are for T ...

Page 5

Electrical Characteristics Limits in standard typeface are for T J less otherwise specified (NOM Symbol Parameter I ON/OFF Input Current ON/OFF e Output Noise n Voltage (RMS) Ripple Rejection I (SC) Short ...

Page 6

Typical Performance Characteristics V (NOM) + 25˚C, ON/OFF pin is tied to V OUT Temperature OUT Short-Circuit Current Ripple Rejection www.national.com Unless otherwise specified 20029408 Short Circuit Current vs Output Voltage 20029410 ...

Page 7

Typical Performance Characteristics V OUT (NOM) + 25˚C, ON/OFF pin is tied (Continued) Ripple Rejection Ripple Rejection Ripple Rejection Unless otherwise specified: C 20029415 20029417 20029419 7 = 1µ 4.7µF, V ...

Page 8

Typical Performance Characteristics V OUT (NOM) + 25˚C, ON/OFF pin is tied (Continued) Ripple Rejection Output Impedance vs Frequency Output Noise Density www.national.com Unless otherwise specified: C Output Impedance vs Frequency 20029422 Output ...

Page 9

Typical Performance Characteristics V OUT (NOM) + 25˚C, ON/OFF pin is tied (Continued) Dropout Voltage vs Temperature Ignd vs Load and Temperature Load Transient Response Unless otherwise specified: C 20029427 Instantaneous Short Circuit ...

Page 10

Typical Performance Characteristics V OUT (NOM) + 25˚C, ON/OFF pin is tied (Continued) Load Transient Response Line Transient Response Line Transient Response www.national.com Unless otherwise specified: C Line Transient Response 20029447 Line Transient ...

Page 11

Typical Performance Characteristics V OUT (NOM) + 25˚C, ON/OFF pin is tied (Continued) Turn-On Time Turn-On Time Unless otherwise specified: C 20029440 20029442 11 = 1µ 4.7µ OUT ...

Page 12

Application Hints EXTERNAL CAPACITORS Like any low-dropout regulator, the LP2992 requires external capacitors for regulator stability. These capacitors must be correctly selected for good performance. Input Capacitor An input capacitor whose capacitance is ≥ 1 µF is required between the ...

Page 13

... LP2992 to 0.3V (see Absolute to keep the regulator Maximum Ratings). LLP Mounting The LLP package requires specific mounting techniques which are detailed in National Semiconductor Application . To prevent Note # 1187. Referring to the section PCB Design Recom- ON/OFF mendations, it should be noted that the pad style which should be used with the LLP package is the NSMD (non-solder mask defined) type ...

Page 14

Physical Dimensions unless otherwise noted For Order Numbers, refer to Table 1 in the “Ordering Information” section of this document. www.national.com inches (millimeters) 5-Lead Small Outline Package (M5) NS Package Number MF05A 14 ...

Page 15

... NATIONAL’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT AND GENERAL COUNSEL OF NATIONAL SEMICONDUCTOR CORPORATION. As used herein: 1. Life support devices or systems are devices or systems which, (a) are intended for surgical implant ...

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