lp2985aim5-3.8 National Semiconductor Corporation, lp2985aim5-3.8 Datasheet

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lp2985aim5-3.8

Manufacturer Part Number
lp2985aim5-3.8
Description
Micropower 150 Ma Low-noise Ultra Low-dropout Regulator Designed For Use With Very Low Esr Output Capacitors
Manufacturer
National Semiconductor Corporation
Datasheet
© 2007 National Semiconductor Corporation
LP2985
Micropower 150 mA Low-Noise Ultra Low-Dropout
Regulator in SOT-23 and micro SMD Packages
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
the LP2985 delivers unequalled performance in all specifica-
tions critical to battery-powered designs:
Dropout Voltage: Typically 300 mV @ 150 mA load, and
7 mV @ 1 mA load.
Ground Pin Current: Typically 850 µA @ 150 mA load, and
75 µA @ 1 mA load.
Enhanced Stability: The LP2985 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 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 registered trademark of National Semiconductor Corporation.
®
(Vertically Integrated PNP) process,
100140
Features
Applications
Ultra low dropout voltage
Guaranteed 150 mA output current
Smallest possible size (SOT-23, micro SMD package)
Requires minimum external components
Stable with low-ESR output capacitor
<1 µA quiescent current when shut down
Low ground pin current at all loads
Output voltage accuracy 1% (A Grade)
High peak current capability
Wide supply voltage range (16V max)
Low Z
Overtemperature/overcurrent protection
−40°C to +125°C junction temperature range
Custom voltages available
Cellular Phone
Palmtop/Laptop Computer
Personal Digital Assistant (PDA)
Camcorder, Personal Stereo, Camera
OUT
: 0.3Ω typical (10 Hz to 1 MHz)
10014001
December 2006
www.national.com

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lp2985aim5-3.8 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 ® registered trademark of National Semiconductor Corporation. © 2007 National Semiconductor Corporation Features ■ Ultra low dropout voltage ■ Guaranteed 150 mA output current ■ ...

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 ...

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... A LP2985AIM5X-2.9 2.9 A LP2985AIM5-2.9 2.9 STD LP2985IM5X-2.9 2.9 STD LP2985IM5-2.9 3.0 A LP2985AIM5X-3.0 3.0 A LP2985AIM5-3.0 3.0 STD LP2985IM5X-3.0 3.0 STD LP2985IM5-3.0 3.1 A LP2985AIM5X-3.1 3.1 A LP2985AIM5-3.1 3.1 STD LP2985IM5X-3.1 3.1 STD LP2985IM5-3.1 3.2 A LP2985AIM5X-3.2 3.2 A LP2985AIM5-3.2 3.2 STD LP2985IM5X-3.2 3.2 STD LP2985IM5-3.2 3.3 A LP2985AIM5X-3.3 3.3 A LP2985AIM5-3.3 3.3 STD LP2985IM5X-3.3 3.3 STD LP2985IM5-3.3 3.5 A LP2985AIM5X-3.5 3.5 A LP2985AIM5-3.5 3.5 STD LP2985IM5X-3.5 3.5 STD LP2985IM5-3.5 3.6 A LP2985AIM5X-3.6 3.6 A LP2985AIM5-3.6 3.6 STD LP2985IM5X-3.6 3.6 STD LP2985IM5-3 ...

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... Output Voltage Grade (V) 3.8 A LP2985AIM5X-3.8 3.8 A LP2985AIM5-3.8 3.8 STD LP2985IM5X-3.8 3.8 STD LP2985IM5-3.8 4.0 A LP2985AIM5X-4.0 4.0 A LP2985AIM5-4.0 4.0 STD LP2985IM5X-4.0 4.0 STD LP2985IM5-4.0 4.5 A LP2985AIM5X-4.5 4.5 A LP2985AIM5-4.5 4.5 STD LP2985IM5X-4.5 4.5 STD LP2985IM5-4.5 4.7 A LP2985AIM5X-4.7 4.7 A LP2985AIM5-4.7 4.7 STD LP2985IM5X-4.7 4.7 STD LP2985IM5-4.7 4.8 A LP2985AIM5X-4.8 4.8 A LP2985AIM5-4.8 4.8 STD LP2985IM5X-4.8 4.8 STD LP2985IM5-4.8 5.0 A LP2985AIM5X-5.0 5.0 A LP2985AIM5-5.0 5.0 STD LP2985IM5X-5.0 5.0 STD LP2985IM5-5.0 5.3 A LP2985AIM5X-5.3 5 ...

Page 5

Output Voltage Grade (V) 2.6 A LP2985AIBPX-2.6 2.6 STD LP2985IBP-2.6 2.6 STD LP2985IBPX-2.6 2.8 A LP2985AIBP-2.8 2.8 A LP2985AIBPX-2.8 2.8 STD LP2985IBP-2.8 2.8 STD LP2985IBPX-2.8 2.9 A LP2985AIBP-2.9 2.9 A LP2985AIBPX-2.9 2.9 STD LP2985IBP-2.9 2.9 STD LP2985IBPX-2.9 3.0 A LP2985AIBP-3.0 ...

Page 6

Output Voltage Grade (V) 2.9 A LP2985AITPX-2.9 2.9 STD LP2985ITP-2.9 2.9 STD LP2985ITPX-2.9 3.0 A LP2985AITP-3.0 3.0 A LP2985AITPX-3.0 3.0 STD LP2985ITP-3.0 3.0 STD LP2985ITPX-3.0 3.3 A LP2985AITP-3.3 3.3 A LP2985AITPX-3.3 3.3 STD LP2985ITP-3.3 3.3 STD LP2985ITPX-3.3 5.0 A LP2985AITP-5.0 ...

Page 7

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) Electrical Characteristics Limits ...

Page 8

Symbol Parameter e Output Noise n Voltage (RMS) Ripple Rejection I (SC) Short Circuit Current O I (PK) Peak Output Current O Note 1: “Absolute Maximum Ratings” indicate limits beyond which damage to the component may occur. Electrical specifications do ...

Page 9

Typical Performance Characteristics (NOM) + 25°C, ON/OFF pin is tied Temperature OUT Short-Circuit Current Ripple Rejection Unless otherwise specified 10014008 Short Circuit Current vs Output Voltage 10014010 10014013 9 = ...

Page 10

Ripple Rejection Ripple Rejection Ripple Rejection www.national.com 10014015 10014017 10014019 10 Ripple Rejection 10014016 Ripple Rejection 10014018 Ripple Rejection 10014023 ...

Page 11

Ripple Rejection 10014022 Output Impedance vs Frequency 10014021 Output Noise Density 10014025 Output Impedance vs Frequency Output Noise Density Ground Pin vs Load Current 11 10014020 10014024 10014026 www.national.com ...

Page 12

Dropout Voltage vs Temperature GND Pin Current vs Temperature Load Transient Response www.national.com Input Current vs Pin 10014027 Instantaneous Short Circuit Current 10014030 Load Transient Response 10014032 12 10014029 10014031 10014033 ...

Page 13

Load Transient Response 10014034 Line Transient Response 10014036 Line Transient Response 10014038 Line Transient Response Line Transient Response Turn-On Time 13 10014035 10014037 10014039 www.national.com ...

Page 14

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 be correctly selected for good performance. Input Capacitor An input capacitor whose capacitance is between the LP2985 ...

Page 15

Important: The output capacitor must maintain its ESR within the stable region over the full operating temperature range of the application to assure stability. The LP2985 requires a minimum of 2.2 µF on the output (out- put capacitor size can ...

Page 16

NSMD (non-solder mask defined) type. For best results during assembly, alignment ordinals on the PC board may be used to facilitate placement of the micro ...

Page 17

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 17 www.national.com ...

Page 18

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 CLOCK- WISE. 5. ...

Page 19

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 CLOCK- WISE. 5. ...

Page 20

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 CLOCK- WISE. 5. ...

Page 21

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 CLOCK- WISE. 5. ...

Page 22

... National Semiconductor and the National Semiconductor logo are registered trademarks of National Semiconductor Corporation. All other brand or product names may be trademarks or registered trademarks of their respective holders. ...

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