MIC5249-2.5YMM TR Micrel Inc, MIC5249-2.5YMM TR Datasheet

300mA UCapl LDO With Reset( )

MIC5249-2.5YMM TR

Manufacturer Part Number
MIC5249-2.5YMM TR
Description
300mA UCapl LDO With Reset( )
Manufacturer
Micrel Inc
Datasheet

Specifications of MIC5249-2.5YMM TR

Regulator Topology
Positive Fixed
Voltage - Output
2.5V
Voltage - Input
Up to 6V
Voltage - Dropout (typical)
0.34V @ 300mA
Number Of Regulators
1
Current - Output
300mA
Current - Limit (min)
300mA
Operating Temperature
-40°C ~ 125°C
Mounting Type
Surface Mount
Package / Case
8-MSOP, Micro8™, 8-uMAX, 8-uSOP,
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
MIC5249-2.5YMMTR
MIC5249-2.5YMMTR
General Description
The MIC5249 is an efficient, precise 300mA CMOS
voltage regulator with power-on reset delay which can be
implemented via an external capacitor. It offers 1% initial
accuracy, extremely-low-dropout voltage (typically 400mV
@ 300mA), and low ground current (typically 85mA) over
load.
Designed specifically for noise-critical applications in hand-
held or battery-powered devices, the MIC5249 comes
equipped with a noise reduction feature to filter the output
noise via an external capacitor. Other features of the
MIC5249 include a logic compatible enable pin, current
limit, thermal shutdown, ultra-fast transient response, and
an active clamp to speed up device turnoff.
The
capacitors, reducing the amount of board space necessary
for power applications, critical in hand-held wireless
devices.
The MIC5249 is available in the MSOP-8 package.
Data sheets and support documentation can be found on
Micrel’s web site at www.micrel.com.
Typical Application
September 2006
MIC5249
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com
also
works
with
low-ESR
Ultra-Low Noise Application
ceramic
1
Features
• 300mA output current
• High PSRR: 65dB@120Hz
• Stable with ceramic output capacitor
• Power-on RESET output with adjustable delay time
• High output accuracy:
• Low dropout voltage of 400mV @ 300mA
• Low quiescent current: 85µA
• Zero current shutdown mode
• Thermal shutdown protection
• Current-limit protection
• Tiny MSOP-8 package
Applications
• Cellular phones
• PDAs
• Fiber optic modules
300mA µCap LDO with Programmable Power-On
±1.0% initial accuracy
±3.0% over temperature
MIC5249
Reset Delay
M9999-090806

Related parts for MIC5249-2.5YMM TR

MIC5249-2.5YMM TR Summary of contents

Page 1

... The MIC5249 is available in the MSOP-8 package. Data sheets and support documentation can be found on Micrel’s web site at www.micrel.com. Typical Application 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 2006 300mA µ ...

Page 2

... Micrel, Inc. Ordering Information Part Number Standard Pb-Free MIC5249-1.8BMM MIC5249-1.8YMM MIC5249-2.5BMM MIC5249-2.5YMM MIC5249-2.6BMM MIC5249-2.6YMM MIC5249-2.8BMM MIC5249-2.8YMM MIC5249-2.85BMM MIC5249-2.85YMM MIC5249-3.0BMM MIC5249-3.0YMM MIC5249-3.3BMM MIC5249-3.3YMM Note: Other Voltage available. Contact Micrel Marketing for details. Pin Configuration Pin Description Pin Number Pin Name 1 CBYP 2 DELAY 3 GND ...

Page 3

... T – ÷ θ . Exceeding the maximum allowable power J(max MIC5249 IN Max Units +1 +3.0 +0.3 %/V 3 225 mV mV 275 500 mV mV 600 µA 150 µA 200 1 µA dB ...

Page 4

... Micrel, Inc. Functional Diagram September 2006 4 MIC5249 M9999-090806 ...

Page 5

... The MIC5249 also features an active shutdown clamp, which is a N-Channel MOSFET that turns on when the device is disabled. This allows the output capacitor and load to discharge, de-energizing the load. No-Load Stability The MIC5249 will remain stable and in regulation with no load unlike many other voltage regulators. This is especially important in application ...

Page 6

... Micrel, Inc. Thermal Consideration The MIC5249 is designed to provide 300mA of continuous current in a very small package. Maximum power dissipation can be calculated based on the output current and the voltage drop across the device. To determine the maximum power dissipation of the package, use the junction-to-ambient thermal resistance of the device and the following basic equation: − ...

Page 7

... Purchaser’s use or sale of Micrel Products for use in life support appliances, devices or systems is a Purchaser’s own risk and Purchaser agrees to fully September 2006 8-Pin MSOP (MM) indemnify Micrel for any damages resulting from such use or sale. © 2002 Micrel, Incorporated. 7 MIC5249 M9999-090806 ...

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