LP2985IM5X-1.5 National Semiconductor, LP2985IM5X-1.5 Datasheet

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LP2985IM5X-1.5

Manufacturer Part Number
LP2985IM5X-1.5
Description
Manufacturer
National Semiconductor
Datasheet
© 2005 National Semiconductor Corporation
LP2985LV
Micropower 150 mA Low-Noise Low-Dropout Regulator
in SOT-23 and micro SMD packages for Applications
with Output Voltages ≤ 2.3V
Designed for Use with Very Low ESR Output Capacitors
General Description
The LP2985LV is a 150 mA, fixed-output voltage regulator
designed to providehigh performance and low noise in ap-
plications requiring output voltages
Using an optimized VIP
cess, the LP2985LV delivers unequalled performance in all
specifications critical to battery-powered designs:
Ground Pin Current: Typically 825 µA
75 µA
Enhanced Stability: The LP2985LV 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: micro SMD package uses 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).
Block Diagram
VIP
is a trademark of National Semiconductor Corporation.
@
1 mA load.
(Vertically Integrated PNP) pro-
<
2.3V.
@
DS101295
150 mA load, and
Features
n Guaranteed 150 mA output current
n Smallest possible size (micro SMD)
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)
10129501
www.national.com
June 2004

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LP2985IM5X-1.5 Summary of contents

Page 1

... Low Noise: By adding bypass capacitor, output noise can be reduced to 30 µV (typical). Block Diagram VIP ™ trademark of National Semiconductor Corporation. © 2005 National Semiconductor Corporation Features n Guaranteed 150 mA output current n Smallest possible size (micro SMD) 2.3V. n Requires minimum external components n Stable with low-ESR output capacitor < ...

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 1.8 A 1.8 STD 1.8 STD Package Order Information Marking LP2985AIM5X-135 LF7A LP2985AIM5-135 LF7A LP2985IM5X-135 LF7B LP2985IM5-135 LF7B LP2985AIM5X-1.5 LCHA LP2985AIM5-1.5 LCHA LP2985IM5X-1.5 LCHB LP2985IM5-1.5 LCHB LP2985AIM5X-1.8 LAYA LP2985AIM5-1.8 LAYA LP2985IM5X-1.8 LAYB LP2985IM5-1.8 LAYB LP2985AIM5X-2.0 LCDA LP2985AIM5-2.0 LCDA LP2985IM5X-2.0 LCDB LP2985IM5-2.0 LCDB LP2985AIBP-1.5 LP2985AIBPX-1.5 LP2985IBP-1 ...

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 Ripple Rejection I (SC) Short Circuit Current O I (PK) Peak Output Current O Note 1: ...

Page 6

Typical Performance Characteristics (NOM) + 1.8V OUT OUT V vs Temperature OUT Short-Circuit Current Ripple Rejection COUT = 4.7µF, Bypass = 10nF www.national.com Unless otherwise specified 25˚C, ON/OFF pin is tied ...

Page 7

Typical Performance Characteristics (NOM) + 1.8V OUT OUT A Output Impedance vs Frequency Noise Density Ground Pin vs Load Current Unless otherwise specified 25˚C, ON/OFF pin is tied to V (Continued) ...

Page 8

Typical Performance Characteristics (NOM) + 1.8V OUT OUT Minimum Input Voltage vs Temperature Input Current vs V Ground Pin Current vs Temperature www.national.com Unless otherwise specified 25˚C, ON/OFF pin is tied ...

Page 9

Typical Performance Characteristics (NOM) + 1.8V OUT OUT A Output Characteristics Load Transient Line Transient Unless otherwise specified 25˚C, ON/OFF pin is tied to V (Continued) IN 10129508 10129543 10129545 9 ...

Page 10

Typical Performance Characteristics (NOM) + 1.8V OUT OUT Line Transient Turn-On Time Turn-On Time www.national.com Unless otherwise specified 25˚C, ON/OFF pin is tied to V (Continued 10129547 10129549 10129550 ...

Page 11

Application Hints EXTERNAL CAPACITORS Like any low-dropout regulator, the LP2985LV requires ex- ternal 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 ...

Page 12

... 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 13

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 13 www.national.com ...

Page 14

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 15

Physical Dimensions inches (millimeters) unless otherwise noted (Continued) 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. ...

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

... BANNED SUBSTANCE COMPLIANCE National Semiconductor manufactures products and uses packing materials that meet the provisions of the Customer Products Stewardship Specification (CSP-9-111C2) and the Banned Substances and Materials of Interest Specification (CSP-9-111S2) and contain no ‘‘Banned Substances’’ as defined in CSP-9-111S2. ...

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