MIC2951-3.3YM Micrel Inc, MIC2951-3.3YM Datasheet

IC REG LDO 150MA 3.3V 8SOIC

MIC2951-3.3YM

Manufacturer Part Number
MIC2951-3.3YM
Description
IC REG LDO 150MA 3.3V 8SOIC
Manufacturer
Micrel Inc
Datasheet

Specifications of MIC2951-3.3YM

Regulator Topology
Positive Fixed or Adjustable
Voltage - Output
3.3V, 1.24 ~ 29 V
Voltage - Input
2 ~ 30 V
Voltage - Dropout (typical)
0.32V @ 150mA
Number Of Regulators
1
Current - Output
150mA
Operating Temperature
-40°C ~ 125°C
Mounting Type
Surface Mount
Package / Case
8-SOIC (3.9mm Width)
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Current - Limit (min)
-
Other names
576-1151

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
MIC2951-3.3YM
Manufacturer:
MICREL/麦瑞
Quantity:
20 000
General Description
The MIC2950 and MIC2951 are “bulletproof” micropower
voltage regulators with very low dropout voltage (typically
40mV at light loads and 250mV at 100mA), and very low
quiescent current. Like their predecessors, the LP2950 and
LP2951, the quiescent current of the MIC2950/MIC2951
increases only slightly in dropout, thus pro-longing battery
life. The MIC2950/MIC2951 are pin for pin compatible with
the LP2950/LP2951, but offer lower dropout, lower
quiescent current, reverse battery, and automotive load
dump protection.
The key additional features and protection offered include
higher output current (150mA), positive transient protection
for up to 60V (load dump), and the ability to survive an
unregulated input voltage transient of –20V below ground
(reverse battery).
The plastic DIP and SOIC versions offer additional system
functions such as programmable output voltage and logic
controlled shutdown. The 3-pin TO-92 MIC2950 is pin-
compatible with the older 5V regulators.
These system functions also include 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 also
available which enables the regulator to be switched on and
off. This part may also be pin-strapped for a 5 V output, or
programmed from 1.24 V to 29 V with the use of two
external resistors.
Data sheets and support documentation can be found on
Micrel’s web site at: www.micrel.com.
___________________________________________________________________________________________________________
Block Diagram
* MIC2950 Discontinuance September 2007.
MM8 is a registered trademark of Micrel, Inc.
February 2010
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (
Features
• High accuracy 3.3, 4.85, or 5V, guaranteed 150mA
• Extremely low quiescent current
• Low-dropout voltage
• Extremely tight load and line regulation
• Very low temperature coefficient
• Use as regulator or reference
• Needs only 1.5µF for stability
• Current and thermal limiting
• Unregulated DC input can withstand –20V reverse
MIC2951 Version Only
• Error flag warns of output dropout
• Logic-controlled electronic shutdown
• Output programmable from 1.24 to 29V
Applications
• Automotive electronics
• Voltage reference
• Avionics
• Cellular telephones
• Battery powered equipment
• SMPS post-regulator
• High efficiency linear power supplies
408
output
battery and +60V positive transients
150mA Low-Dropout Voltage Regulator
) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com
MIC2950*/2951
M9999-021610

Related parts for MIC2951-3.3YM

MIC2951-3.3YM Summary of contents

Page 1

... Like their predecessors, the LP2950 and LP2951, the quiescent current of the MIC2950/MIC2951 increases only slightly in dropout, thus pro-longing battery life. The MIC2950/MIC2951 are pin for pin compatible with the LP2950/LP2951, but offer lower dropout, lower quiescent current, reverse battery, and automotive load dump protection ...

Page 2

... MIC2951-02YM*** 5.0V MIC2951-03YM*** 5.0V MIC2951-03YN*** 5.0V MIC2951-03YMM*** 5.0V MIC2951-3.3YM*** 3.3V Note: * TO-92 Package discontinuance notification issued September 2007. End-of-life-buy offer thru December 31, 2007. Contact factory for additional information. ** Contact factory for Pb-Free version. *** Pb-Free RoHS compliant with ‘high-melting solder’ exemption. ...

Page 3

... Micrel, Inc. Pin Configuration TO-92 (Z) (Bottom View) Pin Description Pin No. Pin No. Pin Name MIC2950 MIC2951 3 1 OUT 2 3 SHDN 2 4 GND 5 ERR February 2010 Pin Function Regulated Output. SNS Sense (Input): Output-voltage sensing end of internal voltage divider for fixed 5V operation. Not used in adjustable configuration. ...

Page 4

... MIC295x-02/-05 (±0.5%), Note 9 Temperature Coefficient MIC295x-03/-06 (±1%), Note 9 MIC2951-3.3 (±1%), Note 9 MIC2951-4.8 (±1%), Note 9 Line Regulation MIC295x-02/-05 (±0.5%), Notes 10, 11 MIC295x-03/-06 (±1%), Notes 10, 11 MIC2951-3.3 (±1%), Notes 10, 11 MIC2951-4.8 (±1%), Notes 10, 11 February 2010 (1) Operating Ratings Input Supply Voltage (V ....................–1.5 to +26V Junction Temperature (T ...................– ...

Page 5

... Micrel, Inc. Parameter Condition Load Regulation MIC295x-02/-05 (±0.5%), 100µA ≤ I MIC295x-03/-06 (±1%), 100µA ≤ I MIC2951-3.3 (±1%), 100µA ≤ I MIC2951-4.8 (±1%), 100µA ≤ I Dropout Voltage MIC295x-02/-03/-05/-06, I MIC295x-02/-03/-05/-06, I MIC295x-02/-03/-05/-06, I MIC2951-3.3 (±1%), I MIC2951-3.3 (±1%), I MIC2951-3.3 (± ...

Page 6

... MIC295x-03/-06 (±1%), Note 14 MIC2951-3.3 (±1%), Note 14 MIC2951-4.8 (±1%), Note 14 Feedback Bias Current Reference Voltage MIC295x-02/05 (±0.5%), Note 9 Temperature Coefficient MIC295x-03/06 (±1%), Note 9 MIC2951-3.3 (±1%), Note 9 MIC2951-4.8 (±1%), Note 9 Feedback Bias Current Temperature Coefficient Error Comparator (Flag Output Leakage Current Error Comparator (Flag) ...

Page 7

... Regulation is measured at constant junction temperature, using pulse testing with a low duty cycle. Changes in output voltage due to heating effects are covered in the specification for thermal regulation. 11. Line regulation for the MIC2951 is tested at 150°C for I See Typical Performance Characteristics for line regulation versus temperature and load current. ...

Page 8

Micrel, Inc. Typical Characteristics February 2010 8 MIC2950/2951 M9999-021610 ...

Page 9

Micrel, Inc. Typical Characteristics (continued) February 2010 9 MIC2950/2951 M9999-021610 ...

Page 10

Micrel, Inc. Typical Characteristics (continued) February 2010 10 MIC2950/2951 M9999-021610 ...

Page 11

... MIC2951 version with external resistors, a minimum load of 1µA is recomm-ended. A 0.1µF capacitor should be placed from the MIC2950/ MIC2951 input to ground if there is more than 10 inches of wire between the input and the AC filter capacitor battery is used as the input. Stray capacitance to the MIC2951 Feedback terminal (pin 7) can cause instability ...

Page 12

Micrel, Inc. Reducing Output Noise In some applications it may be advantageous to reduce the AC noise present at the output. One method is to reduce the regulator bandwidth by increasing the size of the output capacitor. This is the ...

Page 13

Micrel, Inc. Typical Applications 5V Regulator with 2.5V Sleep Function Low Drift Current Source February 2010 Wide Input Voltage Range Current Limiter 5V Current Limiter 13 MIC2950/2951 M9999-021610 ...

Page 14

Micrel, Inc. Typical Applications February 2010 Regulator with Early Warning and Auxiliary Output 14 MIC2950/2951 M9999-021610 ...

Page 15

Micrel, Inc. Typical Applications Latch Off When Error Flag Occurs February 2010 Open Circuit Detector for 4mA to 20mA Current Loop Regulator with State-of-Charge Indicator 15 MIC2950/2951 M9999-021610 ...

Page 16

Micrel, Inc. Typical Applications February 2010 Low Battery Disconnect System Over Temperature Protection Circuit 16 MIC2950/2951 M9999-021610 ...

Page 17

Micrel, Inc. Schematic Diagram February 2010 17 MIC2950/2951 M9999-021610 ...

Page 18

Micrel, Inc. Package Information 0.018 (0.57) February 2010 8-Pin SOIC (M) PIN 1 DIMENSIONS: INCH (MM) 0.380 (9.65) 0.370 (9.40) 0.135 (3.43) 0.125 (3.18) 0.380 (9.65) 0.130 (3.30) 0.320 (8.13) 0.100 (2.54) 0.0375 (0.952) 8-Pin Plastic DIP (N) 18 MIC2950/2951 ...

Page 19

Micrel, Inc. February 2010 8-Pin MSOP (MM) 19 MIC2950/2951 M9999-021610 ...

Page 20

Micrel, Inc. 0.090 (2.286) Radius, t yp. MICREL, INC. 2180 FORTUNE DRIVE SAN JOSE, CA 95131 USA TEL +1 (408) 944-0800 FAX +1 (408) 474-1000 WEB http://www.micrel.com The information furnished by Micrel in this data sheet is believed to be ...

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