MIC2954-03WS TR datasheet, PDF

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MIC2954-03WS TR: DescriptionLDO Regulator Pos 5V 0.25A 4-Pin(3+Tab) SOT-223 T/R; File Size517KB，15 Pages; ManufacturerMicrochip; Websitehttps://www.microchip.com; Environmental Compliance

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MIC2954-03WS TR Overview

LDO Regulator Pos 5V 0.25A 4-Pin(3+Tab) SOT-223 T/R

MIC2954-03WS TR Parametric

Parameter Name	Attribute value
EU restricts the use of certain hazardous substances	Compliant
ECCN (US)	EAR99
Part Status	Active
HTS	8542.39.00.01
Type	LDO
Number of Outputs	1
Polarity	Positive
Accuracy (%)	±1
Output Type	Fixed
Output Voltage (V)	5
Maximum Output Current (A)	0.25
Minimum Input Voltage (V)	2
Maximum Input Voltage (V)	30
Maximum Dropout Voltage @ Current (V)	0.1@1mA\|0.25@50mA\|0.3@100mA\|0.45@250mA
Reference Voltage (V)	1.26
Line Regulation	0.2%/V
Load Regulation	0.2%/V
Maximum Quiescent Current (mA)	0.2
Typical Ground Current @ Full Load (mA)	5
Junction to Case	15°C/W
Special Features	Current Limit\|Shutdown\|Thermal Protection
Minimum Operating Temperature (°C)	-40
Maximum Operating Temperature (°C)	125
Packaging	Tape and Reel
Supplier Package	SOT-223
Pin Count	4
Mounting	Surface Mount
Package Height	1.6
Package Length	6.5
Package Width	3.5
PCB changed	3
Tab	Tab

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MIC2954

250mA Low-Dropout Regulator

General Description

The MIC2954 is a “bulletproof” efficient voltage regulator

with very low dropout voltage (typically 40mV @ light loads

and 375mV @ 250mA), and low quiescent current (120µA

typical). The quiescent current of the MIC2954 increases

only slightly in dropout, thus prolonging battery life. Key

MIC2954 features include protection against reversed

battery, fold-back current limiting, and automotive load

dump protection (60V positive transient).

The MIC2954-07/08BM is an adjustable version that

includes an error flag output that warns of a low output

voltage, which is often due to failing batteries on the input.

This may also be used as a power-on reset. A logic-

compatible shutdown input is provided which enables the

regulator to be switched on and off. This part may be pin-

strapped for 5V output, or programmed from 1.24V to 29V

with the use of two external resistors.

The MIC2954 is available in two voltage tolerances, ±0.5%

maximum and ±1% maximum. Both are guaranteed for

junction temperatures from –40°C to +125°C.

Data sheets and support documentation can be found on

Micrel’s web site at www.micrel.com.

Features

•

High-accuracy 5V, guaranteed 250mA output

Low quiescent current

Low dropout voltage

Extremely tight load and line regulation

Very low temperature coefficient

Current and thermal limiting

Input can withstand –20V reverse battery and+60V

positive transients

Error flag warns of low output voltage

Logic-controlled electronic shutdown

Output programmable from 1.24V to 29V

(MIC2954-07/08)

Available in TO-220, TO-92, and surface-mount SOT-

223 and SOIC-8 packages

Applications

•

Battery powered equipment

•

Cellular telephones

•

Laptop, notebook, and palmtop computers

•

PCMCIA V

and V

regulation/switching

•

Bar code scanners

•

Automotive electronics

•

SMPS post-regulator/dc-to-dc modules

•

Voltage reference

•

High-efficiency linear power supplies

___________________________________________________________________________________________________________

Ordering Information

Part Number

Pb-Free /

Standard

RoHS Compliant

MIC2954-02BT

MIC2954-02WT*

MIC2954-03BT

MIC2954-03WT*

MIC2954-02BS

MIC2954-02WS*

MIC2954-03BS

MIC2954-03WS*

MIC2954-02BZ

MIC2954-02YZ

MIC2954-03BZ

MIC2954-03YZ

MIC2954-07BM

MIC2954-07YM

MIC2954-08BM

MIC2954-08YM

Accuracy

0.5%

1.0%

0.5%

1.0%

0.5%

1.0%

0.5%

1.0%

Junction

Temp. Range

–40° to +125°C

Package

TO-220-3

SOT-223-3

TO-92-3**

8-Pin SOIC

* RoHS compliant with ‘high-melting solder’ exemption.

** TO-92 package discontinuance notification issued September 2007. End-of-life-buy offered thru December 31, 2007.

Contact factory for additional information.

Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (

408

) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com

September 2007

M9999-090607

MIC2954-03WS TR Related Products

	MIC2954-03WS TR	MIC2954-08YM TR	MIC2954-07YM TR	MIC2954-02WS	MIC2954-08YM	MIC2954-03WT	MIC2954-02WT	MIC2954-07YM	MIC2954-02WS-TR	MIC2954-03WS
Description	LDO Regulator Pos 5V 0.25A 4-Pin(3+Tab) SOT-223 T/R	LDO Regulator Pos 1.24V to 29V5V 0.25A Automotive 8-Pin SOIC N T/R	LDO Regulator Pos 1.24V to 29V5V 0.25A Automotive 8-Pin SOIC N T/R	LDO Regulator Pos 5V 0.25A 4-Pin(3+Tab) SOT-223 Tube	LDO Regulator Pos 1.24V to 29V5V 0.25A 8-Pin SOIC N Tube	LDO Regulator Pos 5V 0.25A Automotive 3-Pin(3+Tab) TO-220 Tube	LDO Regulator Pos 5V 0.25A 3-Pin(3+Tab) TO-220 Tube	LDO Regulator Pos 1.24V to 29V5V 0.25A Automotive 8-Pin SOIC N Tube	LDO Regulator Pos 5V 0.25A Automotive 4-Pin(3+Tab) SOT-223 T/R	LDO Regulator Pos 5V 0.25A 4-Pin(3+Tab) SOT-223 Tube
EU restricts the use of certain hazardous substances	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant
ECCN (US)	EAR99	EAR99	EAR99	EAR99	EAR99	EAR99	EAR99	EAR99	EAR99	EAR99
Part Status	Active	Active	Active	Active	Active	Active	Active	Active	Active	Active
HTS	8542.39.00.01	8542.39.00.01	8542.39.00.01	8542.39.00.01	8542.39.00.01	8542.39.00.01	8542.39.00.01	8542.39.00.01	8542.39.00.01	8542.39.00.01
Type	LDO	LDO	LDO	LDO	LDO	LDO	LDO	LDO	LDO	LDO
Number of Outputs	1	1	1	1	1	1	1	1	1	1
Polarity	Positive	Positive	Positive	Positive	Positive	Positive	Positive	Positive	Positive	Positive
Accuracy (%)	±1	±1	±0.5	±0.5	±1	±1	±0.5	±0.5	±0.5	±1
Output Type	Fixed	Adjustable\|Fixed	Fixed\|Adjustable	Fixed	Adjustable\|Fixed	Fixed	Fixed	Adjustable\|Fixed	Fixed	Fixed
Output Voltage (V)	5	1.24 to 29\|5	5\|1.24 to 29	5	1.24 to 29\|5	5	5	1.24 to 29\|5	5	5
Maximum Output Current (A)	0.25	0.25	0.25	0.25	0.25	0.25	0.25	0.25	0.25	0.25
Minimum Input Voltage (V)	2	2	2	2	2	2	2	2	2	2
Maximum Input Voltage (V)	30	30	30	30	30	30	30	30	30	30
Maximum Dropout Voltage @ Current (V)	0.1@1mA\|0.25@50mA\|0.3@100mA\|0.45@250mA	0.1@1mA\|0.25@50mA\|0.3@100mA\|0.45@250mA	0.45@250mA\|0.3@100mA\|0.25@50mA\|0.1@1mA	0.1@1mA\|0.25@50mA\|0.3@100mA\|0.45@250mA	0.1@1mA\|0.25@50mA\|0.3@100mA\|0.45@250mA	0.1@1mA\|0.25@50mA\|0.3@100mA\|0.45@250mA	0.45@250mA\|0.3@100mA\|0.1@1mA\|0.25@50mA	0.1@1mA\|0.25@50mA\|0.3@100mA\|0.45@250mA	0.45@250mA\|0.3@100mA\|0.25@50mA\|0.1@1mA	0.45@250mA\|0.3@100mA\|0.25@50mA\|0.1@1mA
Reference Voltage (V)	1.26	1.26	1.25	1.25	1.26	1.26	1.25	1.25	1.25	1.26
Line Regulation	0.2%/V	0.2%/V	0.1%/V	0.1%/V	0.2%/V	0.2%/V	0.1%/V	0.1%/V	0.1%/V	0.2%/V
Load Regulation	0.2%/V	0.2%/V	0.2%/V	0.2%/V	0.2%/V	0.2%/V	0.2%/V	0.2%/V	0.2%/V	0.2%/V
Maximum Quiescent Current (mA)	0.2	0.2	0.2	0.2	0.2	0.2	0.2	0.2	0.2	0.2
Typical Ground Current @ Full Load (mA)	5	5	5	5	5	5	5	5	5	5
Special Features	Current Limit\|Shutdown\|Thermal Protection	Current Limit\|Shutdown\|Thermal Protection	Thermal Protection\|Shutdown\|Current Limit	Current Limit\|Shutdown\|Thermal Protection	Current Limit\|Shutdown\|Thermal Protection	Current Limit\|Shutdown\|Thermal Protection	Current Limit\|Shutdown\|Thermal Protection	Current Limit\|Shutdown\|Thermal Protection	Thermal Protection\|Shutdown\|Current Limit	Thermal Protection\|Shutdown\|Current Limit
Minimum Operating Temperature (°C)	-40	-40	-40	-40	-40	-40	-40	-40	-40	-40
Maximum Operating Temperature (°C)	125	125	125	125	125	125	125	125	125	125
Packaging	Tape and Reel	Tape and Reel	Tape and Reel	Tube	Tube	Tube	Tube	Tube	Tape and Reel	Tube
Supplier Package	SOT-223	SOIC N	SOIC N	SOT-223	SOIC N	TO-220	TO-220	SOIC N	SOT-223	SOT-223
Pin Count	4	8	8	4	8	3	3	8	4	4
Mounting	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Through Hole	Through Hole	Surface Mount	Surface Mount	Surface Mount
Package Height	1.6	1.48	1.48	1.6	1.48	9.14(Max)	9.14(Max)	1.48	1.6	1.6
Package Length	6.5	4.93	4.93	6.5	4.93	10.67(Max)	10.67(Max)	4.93	6.5	6.5
Package Width	3.5	3.94	3.94	3.5	3.94	4.83(Max)	4.83(Max)	3.94	3.5	3.5
PCB changed	3	8	8	3	8	3	3	8	3	3
Junction to Case	15°C/W	-	-	15°C/W	-	2.5°C/W	2.5°C/W	-	15°C/W	15°C/W
Tab	Tab	-	-	Tab	-	Tab	Tab	-	Tab	Tab

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