LP2985AIM5X-2.9 National Semiconductor, LP2985AIM5X-2.9 Datasheet

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LP2985AIM5X-2.9

Manufacturer Part Number
LP2985AIM5X-2.9
Description
Micropower 150 mA Low-Noise Ultra Low-Dropout Regulator Designed for Use with Very Low ESR Output Capacitors
Manufacturer
National Semiconductor
Datasheet

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© 2000 National Semiconductor Corporation
LP2985
Micropower 150 mA Low-Noise Ultra Low-Dropout
Regulator
Designed for Use with Very Low ESR Output Capacitors
General Description
The LP2985 is a 150 mA, fixed-output voltage regulator de-
signed to provide ultra low-dropout and low noise in battery
powered applications.
Using an optimized VIP
cess, the LP2985 delivers unequalled performance in all
specifications critical to battery-powered designs:
Dropout Voltage: Typically 300 mV
7 mV
Ground Pin Current: Typically 850 µA
75 µA
Enhanced Stability: The LP2985 is stable with output ca-
pacitor ESR as low as 5 m , 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 micro SMD 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 2.5V 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-
@
@
DS100140
150 mA load, and
150 mA load, and
Features
n Ultra low dropout voltage
n Guaranteed 150 mA output current
n Smallest possible size (SOT-23, micro SMD 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
: 0.3
typical (10 Hz to 1 MHz)
DS100140-1
www.national.com
March 2000

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LP2985AIM5X-2.9 Summary of contents

Page 1

... Multiple voltage options, from 2.5V to 5.0V, are available as standard products. Consult factory for custom voltages. Block Diagram VIP ™ trademark of National Semiconductor Corporation. © 2000 National Semiconductor Corporation Features n Ultra low dropout voltage n Guaranteed 150 mA output current n Smallest possible size (SOT-23, micro SMD 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

... LP2985IM5X-2.5 LAUB LP2985IM5-2.5 LAUB LP2985AIM5X-2.7 LALA LP2985AIM5-2.7 LALA LP2985IM5X-2.7 LALB LP2985IM5-2.7 LALB LP2985AIM5X-2.8 L0KA LP2985AIM5-2.8 L0KA LP2985IM5X-2.8 L0KB LP2985IM5-2.8 L0KB LP2985AIM5X-2.9 LAXA LP2985AIM5-2.9 LAXA LP2985IM5X-2.9 LAXB LP2985IM5-2.9 LAXB LP2985AIM5X-3.0 L0OA LP2985AIM5-3.0 L0OA LP2985IM5X-3.0 L0OB LP2985IM5-3.0 L0OB LP2985AIM5X-3.1 L0PA LP2985AIM5-3.1 L0PA LP2985IM5X-3.1 L0PB LP2985IM5-3 ...

Page 4

... L0TA LP2985IM5X-4.0 L0TB LP2985IM5-4.0 L0TB LP2985AIM5X-4.7 LAJA LP2985AIM5-4.7 LAJA LP2985IM5X-4.7 LAJB LP2985IM5-4.7 LAJB LP2985AIM5X-4.8 LAKA LP2985AIM5-4.8 LAKA LP2985IM5X-4.8 LAKB LP2985IM5-4.8 LAKB LP2985AIM5X-5.0 L0UA LP2985AIM5-5.0 L0UA LP2985IM5X-5.0 L0UB LP2985IM5-5.0 L0UB LP2985AIBP-2.5 LP2985AIBPX-2.5 LP2985IBP-2.5 LP2985IBPX-2.5 LP2985AIBP-2.8 LP2985AIBPX-2.8 LP2985IBP-2.8 LP2985IBPX-2.8 LP2985AIBP-3.3 LP2985AIBPX-3.3 LP2985IBPX-3.3 LP2985IBPX-3.3 4 ...

Page 5

... 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 6

Electrical Characteristics Limits in standard typeface are for T less otherwise specified (NOM Symbol Parameter Ripple Rejection I (SC) Short Circuit Current O I (PK) Peak Output Current O Note 1: “Absolute ...

Page 7

Typical Performance Characteristics V (NOM) + 25˚C, ON/OFF pin is tied to V OUT Temperature OUT Short-Circuit Current Ripple Rejection Unless otherwise specified Short-Circuit Current DS100140-8 Short Circuit Current vs Output Voltage ...

Page 8

Typical Performance Characteristics V (NOM) + 25˚C, ON/OFF pin is tied to V OUT A Ripple Rejection Ripple Rejection Ripple Rejection www.national.com Unless otherwise specified (Continued) IN Ripple Rejection DS100140-15 Ripple Rejection DS100140-17 Ripple Rejection DS100140-19 ...

Page 9

Typical Performance Characteristics V (NOM) + 25˚C, ON/OFF pin is tied to V OUT A Ripple Rejection Output Impedance vs Frequency Output Noise Density Unless otherwise specified (Continued) IN Output Impedance vs Frequency DS100140-22 Output Noise ...

Page 10

Typical Performance Characteristics V (NOM) + 25˚C, ON/OFF pin is tied to V OUT A Dropout Voltage vs Temperature Input Current vs Pin Instantaneous Short Circuit Current www.national.com Unless otherwise specified (Continued) IN Dropout Voltage vs ...

Page 11

Typical Performance Characteristics V (NOM) + 25˚C, ON/OFF pin is tied to V OUT A Load Transient Response Line Transient Response Line Transient Response Unless otherwise specified (Continued) IN Load Transient Response DS100140-33 Line Transient Response ...

Page 12

Typical Performance Characteristics V (NOM) + 25˚C, ON/OFF pin is tied to V OUT A Turn-On Time Turn-On Time Application Hints EXTERNAL CAPACITORS Like any low-dropout regulator, the LP2985 requires external capacitors for regulator stability. These capacitors must ...

Page 13

... Maximum Ratings). Micro SMD Mounting The micro SMD package requires specific mounting tech- niques which are detailed in National Semiconductor Appli- cation Note # 1112. Referring to the section Surface Mount Technology (SMT) Assembly Considerations , it should be noted that the pad style which must be used with the 5-pin package is the NSMD (non-solder mask defined) type ...

Page 14

Application Hints (Continued) mance. A micro SMD test board was brought to within fluorescent desk lamp and the effect on the regulated www.national.com output voltage was negligible, showing a deviation of less than 0.1% from nominal. ...

Page 15

Physical Dimensions inches (millimeters) unless otherwise noted For Order Numbers, refer to Table 1 in the “Ordering Information” section of this document. 5-Lead Small Outline Package (M5) NS Package Number MF05A 15 www.national.com ...

Page 16

Physical Dimensions NOTES: UNLESS OTHERWISE SPECIFIED 1. EPOXY COATING 2. 63Sn/37Pb EUTECTIC BUMP 3. RECOMMEND NON-SOLDER MASK DEFINED LANDING PAD. 4. PIN 1 IS ESTABLISHED BY LOWER LEFT CORNER WITH RESPECT TO TEXT ORIENTATION. REMAINING PINS ARE NUMBERED COUNTER CLOCKWISE. ...

Page 17

... 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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