MIC5249-3.0BMM Micrel Inc, MIC5249-3.0BMM Datasheet

IC REG LDO 300MA 3.0V 8-MSOP

MIC5249-3.0BMM

Manufacturer Part Number
MIC5249-3.0BMM
Description
IC REG LDO 300MA 3.0V 8-MSOP
Manufacturer
Micrel Inc
Datasheet

Specifications of MIC5249-3.0BMM

Regulator Topology
Positive Fixed
Voltage - Output
3V
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
Contains lead / RoHS non-compliant

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
MIC5249-3.0BMM
Manufacturer:
MICREL
Quantity:
2 910
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

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MIC5249-3.0BMM 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

... D(max) D conditions that are critical to the application will give the maximum operating conditions for the regulator circuit. For example, when operating the MIC5249-3.0BMM at September 2006 50°C with a minimum footprint layout, the maximum input voltage for a set output current can be determined as follows: The junction-to-ambient thermal resistance for the minimum footprint is 200° ...

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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