LP3981IMM-3.03 National Semiconductor, LP3981IMM-3.03 Datasheet

LP3981IMM-3.03

Manufacturer Part Number

LP3981IMM-3.03

Description

Low Dropout (LDO) Regulators

Manufacturer

National Semiconductor

Datasheet

1.LP3981IMM-3.03.pdf (11 pages)

Specifications of LP3981IMM-3.03

Number Of Outputs

Polarity

Positive

Input Voltage Max

6 V

Output Voltage

3.03 V

Output Type

Fixed

Dropout Voltage (max)

0.005 V at 1 mA

Output Current

0.3 A

Voltage Regulation Accuracy

+/- 2 %

Maximum Power Dissipation

476 mW

Maximum Operating Temperature

+ 125 C

Mounting Style

SMD/SMT

Package / Case

MSOP

Minimum Operating Temperature

- 40 C

Available stocks

Company

Part Number

Manufacturer

Quantity

Price

Company:

Bonase Electronics (HK) Co., Limited

Part Number:

LP3981IMM-3.03

Manufacturer:

Quantity:

600

Company:

Meier Automation Equipment Co., Limited

Part Number:

LP3981IMM-3.03

Manufacturer:

NS/国半

Quantity:

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Part Number:

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Quantity:

4 000

Company:

Bonase Electronics (HK) Co., Limited

Part Number:

LP3981IMM-3.03/NOPB

Manufacturer:

NS/TI

Quantity:

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LP3981

Micropower, 300mA Ultra Low-Dropout CMOS Voltage

Regulator

General Description

The LP3981’s performance is optimized for battery powered

systems to deliver ultra low noise, extremely low dropout

voltage and low quiescent current. Regulator ground current

increases only slightly in dropout, further prolonging the

battery life.

Power supply rejection is better than 60 dB at low frequen-

cies. This high power supply rejection is maintained down to

lower input voltage levels common to battery operated cir-

cuits.

The device is ideal for mobile phone and similar battery

powered wireless applications. It provides up to 300 mA,

from a 2.5V to 6V input, consuming less than 1µA in disable

mode.

The LP3981 is available in MSOP-8 package. For LP3981 in

LLP-6 package, contact NSC sales offices. Performance is

specified for −40˚C to +125˚C temperature range. The de-

vice available in the following output voltages; 2.5V, 2.7V,

2.8V, 2.83V, 3.0V, 3.03V and 3.3V as standard. Other output

options can be made available, please contact your local

NSC sales office.

Key Specifications

n 2.5 to 6.0V input range

n 300mA guaranteed output

Typical Application Circuit

Note: Pin Numbers in parenthesis indicate LLP-6 package.

DS200203

n 60dB PSRR at 1kHz

n ≤1µA quiescent current when shut down

n Fast Turn-On time: 120 µs (typ.) with C

n 132mV typ dropout with 300mA load

n 35µVrms output noise over 10Hz to 100kHz

n −40 to +125˚C junction temperature range for operation

n 2.5V, 2.7V, 2.8V, 2.83V, 3.0V, 3.03V, and 3.3V outputs

Features

n Small, space saving MSOP-8

n Low Thermal Resistance in LLP-6 package gives

n Logic controlled enable

n Stable with ceramic and high quality tantalum capacitors

n Fast turn-on

n Thermal shutdown and short-circuit current limit

Applications

n CDMA cellular handsets

n Wideband CDMA cellular handsets

n GSM cellular handsets

n Portable information appliances

n Tiny 3.3V

standard

excellent power capability

5% to 2.5V, 300mA converter

20020302

BYPASS

www.national.com

April 2005

= 0.01uF

Related parts for LP3981IMM-3.03

LP3981IMM-3.03 Summary of contents

Page 1

... Typical Application Circuit Note: Pin Numbers in parenthesis indicate LLP-6 package. © 2005 National Semiconductor Corporation n 60dB PSRR at 1kHz n ≤1µA quiescent current when shut down n Fast Turn-On time: 120 µs (typ.) with C n 132mV typ dropout with 300mA load n 35µ ...

Page 2

Block Diagram Pin Descriptions Name V EN GND V OUT V IN Bypass V OUT-SENSE N.C GND Connection Diagrams MSOP-8 Package Top View See NS Package Number MUA008AE www.national.com MSOP-8 LLP Enable Input Logic, Enable High ...

Page 3

... For MSOP-8 Package LP3981 Supplied as 1000 LP3981 Supplied as 3500 Units, Tape and Reel Units, Tape and Reel LP3981IMM-2.5 LP3981IMMX-2.5 LP3981IMM-2.7 LP3981IMMX-2.7 LP3981IMM-2.8 LP3981IMMX-2.8 LP3981IMM-2.83 LP3981IMMX-2.83 LP3981IMM-3.0 LP3981IMMX-3.0 LP3981IMM-3.03 LP3981IMMX-3.03 LP3981IMM-3.3 LP3981IMMX-3.3 3 Package Marking LO1UB LO1VB LO1ZB L01SB L017B LO1YB LO1XB Package Marking LFKB ...

Page 4

... Absolute Maximum Ratings If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications OUT OUT-SENSE Junction Temperature Storage Temperature Lead Temp. Pad Temp. Power Dissipation (Note 3) θ (MSOP-8) JA θ (LLP-6) JA Maximum Power Dissipation at 25˚C ...

Page 5

Electrical Characteristics Unless otherwise specified 1.2V cal values and imits appearing in standard typeface are for T junction temperature range for operation, −40˚C to +125˚C. (Notes 6, 7) Symbol Parameter V Logic High Input threshold IH ...

Page 6

Typical Performance Characteristics C = 0.033 µ 0.5V OUT Output Voltage vs. Temperature (V Ground Current vs. Load Current (V www.national.com FIGURE 2. PSRR Input Perturbation Unless otherwise specified 25˚C, Enable ...

Page 7

Typical Performance Characteristics C = 0.033 µ 0.5V OUT A Output Short Circuit Current Ripple Rejection ( Load Transient Response (V Unless otherwise specified 25˚C, Enable pin is ...

Page 8

Typical Performance Characteristics C = 0.033 µ 0.5V OUT Line Transient Response ( OUT Line Transient Response ( OUT ...

Page 9

Application Hints (Continued) 125˚C and an ambient temperature of 25˚C. The device in a MSOP package returns a figure of 0.476W, ( θ W). The actual power dissipation across the device can be rep- resented by the following equation: P ...

Page 10

Physical Dimensions www.national.com inches (millimeters) unless otherwise noted NS Package Number MUA008AE NS Package Number LDC06D 10 ...

Page 11

... 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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