IC VREG LDO MCRPWR 5V S8-SOIC

LP2954AIMX/NOPB

Manufacturer Part NumberLP2954AIMX/NOPB
DescriptionIC VREG LDO MCRPWR 5V S8-SOIC
ManufacturerNational Semiconductor
LP2954AIMX/NOPB datasheet
 


Specifications of LP2954AIMX/NOPB

Regulator TopologyPositive Fixed or AdjustableVoltage - Output5V, 1.23 ~ 29 V
Voltage - Input6 ~ 30 VVoltage - Dropout (typical)0.47V @ 250mA
Number Of Regulators1Current - Output250mA
Operating Temperature-40°C ~ 125°CMounting TypeSurface Mount
Package / Case8-SOIC (3.9mm Width)Lead Free Status / RoHS StatusLead free / RoHS Compliant
Current - Limit (min)-Other namesLP2954AIMX
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LP2954/LP2954A
5V and Adjustable Micropower Low-Dropout Voltage
Regulators
General Description
The LP2954 is a 5V micropower voltage regulator with very
low quiescent current (90 µA typical at 1 mA load) and very
low dropout voltage (typically 60 mV at light loads and
470 mV at 250 mA load current).
The quiescent current increases only slightly at dropout
(120 µA typical), which prolongs battery life.
The LP2954 with a fixed 5V output is available in the three-
lead TO-220 and TO-263 packages. The adjustable LP2954
is provided in an 8-lead surface mount, small outline pack-
age. The adjustable version also provides a resistor network
which can be pin strapped to set the output to 5V.
Reverse battery protection is provided.
The tight line and load regulation (0.04% typical), as well as
very low output temperature coefficient make the LP2954
well suited for use as a low-power voltage reference.
Output accuracy is guaranteed at both room temperature
and over the entire operating temperature range.
Package Outline and Ordering
Information
TO-220 3–Lead Plastic Package
Front View
Order Number LP2954AIT or LP2954IT
See NS Package T03B
SO-8 Small Outline Surface Mount
Top View
Order Number LP2954AIM or LP2954IM
See NS Package M08A
© 2005 National Semiconductor Corporation
Features
n 5V output within 1.2% over temperature (A grade)
n Adjustable 1.23 to 29V output voltage available
(LP2954IM and LP2954AIM)
n Guaranteed 250 mA output current
n Extremely low quiescent current
n Low dropout voltage
n Reverse battery protection
n Extremely tight line and load regulation
n Very low temperature coefficient
n Current and thermal limiting
n Pin compatible with LM2940 and LM340 (5V version
only)
n Adjustable version adds error flag to warn of output drop
and a logic-controlled shutdown
Applications
n High-efficiency linear regulator
n Low dropout battery-powered regulator
TO-263 3-Lead Plastic Surface-Mount Package
01112802
Order Number LP2954AIS or LP2954IS
01112833
DS011128
April 2005
01112809
Top View
01112810
Side View
See NS Package TS3B
www.national.com

LP2954AIMX/NOPB Summary of contents

  • Page 1

    ... See NS Package T03B SO-8 Small Outline Surface Mount Top View Order Number LP2954AIM or LP2954IM See NS Package M08A © 2005 National Semiconductor Corporation Features n 5V output within 1.2% over temperature (A grade) n Adjustable 1.23 to 29V output voltage available (LP2954IM and LP2954AIM) n Guaranteed 250 mA output current ...

  • Page 2

    Ordering Information Order Number LP2954AIT LP2954IT LP2954AIS LP2954IS LP2954AIM −40 to +125 LP2954IM www.national.com Temp. Range Package (T ) ˚C (JEDEC) J −40 to +125 TO-220 −40 to +125 TO-263 SO Package Number TO3B TS3B M08A ...

  • Page 3

    ... Absolute Maximum Ratings If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. Operating Junction Temperature Range LP2954AI/LP2954I Electrical Characteristics Limits in standard typeface are for T J are guaranteed by production testing or correlation techniques using standard Statistical Quality Control (SQC) methods. Un- ...

  • Page 4

    Electrical Characteristics Limits in standard typeface are for T are guaranteed by production testing or correlation techniques using standard Statistical Quality Control (SQC) methods. Un- less otherwise noted 6V mA Symbol Parameter ...

  • Page 5

    Electrical Characteristics Note 1: Absolute maximum ratings indicate limits beyond which damage to the component may occur. Electrical specifications do not apply when operating the device outside of its rated operating conditions. Note 2: The maximum allowable power dissipation is ...

  • Page 6

    Typical Performance Characteristics Ground Pin Current vs Load Ground Pin Current Ripple Rejection www.national.com (Continued) 01112814 01112816 01112818 6 Ground Pin Current 01112815 Output Noise Voltage 01112817 Ripple Rejection 01112819 ...

  • Page 7

    Typical Performance Characteristics Ripple Rejection Line Transient Response Load Transient Response (Continued) Line Transient Response 01112820 01112822 Load Transient Response 01112824 7 01112821 Output Impedance 01112823 01112825 www.national.com ...

  • Page 8

    Typical Performance Characteristics Dropout Characteristics Short-Circuit Output Current and Maximum Output Current Application Hints EXTERNAL CAPACITORS A 2.2 µF (or greater) capacitor is required between the output pin and the ground to assure stability (refer to Figure 1). Without this ...

  • Page 9

    Application Hints (Continued) DROPOUT VOLTAGE The dropout voltage of the regulator is defined as the mini- mum input-to-output voltage differential required for the out- put voltage to stay within 100 mV of the output voltage measured with a 1V differential. ...

  • Page 10

    Application Hints (Continued) DROPOUT DETECTION COMPARATOR This comparator produces a logic “LOW” whenever the out- put falls out of regulation by more than about 5%. This figure results from the comparator’s built-in offset divided by the 1.23V ...

  • Page 11

    Typical Applications *Output voltage equals +V minus dropout voltage, which varies with output current. Current limits at 380 mA (typical). IN Typical Application Circuit 01112801 5V Regulator 01112806 5V Current Limiter 01112807 11 www.national.com ...

  • Page 12

    Schematic Diagram www.national.com 12 01112808 ...

  • Page 13

    Physical Dimensions inches (millimeters) unless otherwise noted TO-220 3-Lead Plastic Package Order Number LP2954AIT or LP2954IT NS Package T03B 13 www.national.com ...

  • Page 14

    Physical Dimensions www.national.com inches (millimeters) unless otherwise noted (Continued) TO-263 3-Lead Plastic Surface Mount Package Order Number LP2954AIS or LP2954IS NS Package TS3B SO-8 Surface Mount Package Order Number LP2954AIM or LP2954IM NS Package Number M08A 14 ...

  • Page 15

    ... 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. ...