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LP2989IM-2.5 の電気的特性と機能
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LP2989IM-2.5のメーカーはNational Semiconductorです、この部品の機能は「Micropower/Low Noise/ 500 mA Ultra Low-Dropout Regulator For Use with Ceramic Output Capacitors」です。 |
製品の詳細 ( Datasheet PDF )
| 部品番号 | LP2989IM-2.5 |
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| 部品説明 | Micropower/Low Noise/ 500 mA Ultra Low-Dropout Regulator For Use with Ceramic Output Capacitors | ||
| メーカ | National Semiconductor | ||
| ロゴ |  |
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このページの下部にプレビューとLP2989IM-2.5ダウンロード（pdfファイル）リンクがあります。 Total 12 pages
March 2000
LP2989
Micropower/Low Noise, 500 mA Ultra Low-Dropout
Regulator
For Use with Ceramic Output Capacitors
General Description
The LP2989 is a fixed-output 500 mA precision LDO regula-
tor designed for use with ceramic output capacitors.
Output noise can be reduced to 18µV (typical) by connecting
an external 10 nF capacitor to the bypass pin.
Using an optimized VIP™ (Vertically Integrated PNP) pro-
cess, the LP2989 delivers superior performance:
Dropout Voltage: Typically 310 mV @ 500 mA load, and 1
mV @ 100 µA load.
Ground Pin Current: Typically 3 mA @ 500 mA load, and
110 µA @ 100 µA load.
Sleep Mode: The LP2989 draws less than 0.8 µA quiescent
current when shutdown pin is pulled low.
Error Flag: The built-in error flag goes low when the output
drops approximately 5% below nominal.
Precision Output: Guaranteed output voltage accuracy is
0.75% (“A” grade) and 1.25% (standard grade) at room tem-
perature.
Features
n Ultra low dropout voltage
n Guaranteed 500 mA continuous output current
n Very low output noise with external capacitor
n SO-8 surface mount package
n <0.8 µA quiescent current when shutdown
n Low ground pin current at all loads
n 0.75% output voltage accuracy (“A” grade)
n High peak current capability (800 mA typical)
n Wide supply voltage range (16V max)
n Overtemperature/overcurrent protection
n −40˚C to +125˚C junction temperature range
Applications
n Notebook/Desktop PC
n PDA/Palmtop Computer
n Wireless Communication Terminals
n SMPS Post-Regulator
Block Diagram
VIP™ is a trademark of National Semiconductor Corporation.
© 2000 National Semiconductor Corporation DS101339
DS101339-1
www.national.com
1 Page  
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
Operating
Junction Temperature Range
Lead Temperature (Soldering,
5 seconds)
ESD Rating (Note 2)
Power Dissipation (Note 3)
−65˚C to +150˚C
−40˚C to +125˚C
260˚C
2 kV
Internally Limited
Input Supply Voltage (Survival)
Input Supply Voltage
(Operating)
Sense Pin
Output Voltage (Survival)
(Note 4)
IOUT (Survival)
Input-Output Voltage (Survival)
(Note 5)
−0.3V to +16V
2.1V to +16V
−0.3V to +6V
−0.3V to +16V
Short Circuit
Protected
−0.3V to +16V
Electrical Characteristics
Limits in standard typeface are for TJ = 25˚C, and limits in boldface type apply over the full operating temperature range. Un-
less otherwise specified: VIN = VO(NOM) + 1V, IL = 1 mA, COUT = 4.7 µF, CIN = 1 µF, VS/D = 2V.
Symbol
Parameter
Conditions
Typical
LP2989AI-X.X
(Note 6)
Min Max
LP2989I-X.X
(Note 6)
Min Max
Units
VO Output Voltage
Tolerance
1 mA < IL < 500 mA
VO(NOM) + 1V ≤ VIN ≤
16V
1 mA < IL < 500 mA
VO(NOM) + 1V ≤ VIN ≤
16V
−0.75 0.75 −1.25 1.25
−1.5 1.5 −2.5 2.5
−4.0 2.5 −5.0 3.5
%VNOM
−3.5 2.5 −4.5 3.5
−25˚C ≤ TJ ≤ 125˚C
Output Voltage Line
Regulation
VO(NOM) + 1V ≤ VIN ≤
16V
0.005
0.014
0.032
0.014
0.032
%/V
Load Regulation
1 mA < IL < 500 mA
0.4
%VNOM
VIN– VO
Dropout Voltage
(Note 7)
IL = 100 µA
1
3
4
3
4
IL = 200 mA
150
200
200
mV
300 300
IL = 500 mA 310 425 425
650 650
IGND
Ground Pin Current
IL = 100 µA
175 175
110 µA
200 200
IL = 200 mA
1
2
2
3.5 3.5
IL = 500 mA
3
6
6
99
VS/D < 0.18V
VS/D < 0.4V
0.5
0.05
2
0.8
2
0.8
IO(PK)
Peak Output Current
VOUT ≥ VO(NOM) − 5%
800
600
600
IO(MAX)
Short Circuit Current
RL = 0 (Steady State)
(Note 9)
1000
mA
µA
mA
en
Output Noise Voltage
BW = 100 Hz to
(RMS)
100 kHz, COUT = 10 µF
CBYPASS = .01 µF VOUT
18
= 2.5V
µV(RMS)
Ripple Rejection
f = 1 kHz, COUT = 10 µF
60
dB
3 www.national.com
3Pages 
Typical Performance Characteristics Unless otherwise specified: TA = 25˚C, COUT = 4.7 µF,
CIN = 1 µF, S/D is tied to VIN, VIN = VO(NOM) + 1V, IL = 1 mA, VOUT = 2.5V. (Continued)
Line Transient Response
Line Transient Response
Line Transient Response
DS101339-11
Line Transient Response
DS101339-26
Load Transient Response
DS101339-15
Load Transient Response
DS101339-16
DS101339-17
www.national.com
6
DS101339-18
6 Page | |||
| ページ | 合計 : 12 ページ | ||
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PDF ダウンロード | [ LP2989IM-2.5 データシート.PDF ] | |
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データシートを活用すると、その部品の主な機能と仕様を詳しく理解できます。 ピン構成、電気的特性、動作パラメータ、性能を確認してください。 |
共有リンク
Link :| 部品番号 | 部品説明 | メーカ |
| LP2989IM-2.5 | Micropower/Low Noise/ 500 mA Ultra Low-Dropout Regulator For Use with Ceramic Output Capacitors | National Semiconductor |
| LP2989IM-2.5 | Micropower/Low Noise/ 500 mA Ultra Low-Dropout Regulator For Use with Ceramic Output Capacitors | National Semiconductor |