MIC5219-3.3BM5 Micrel Semiconductor, MIC5219-3.3BM5 Datasheet

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MIC5219-3.3BM5

Manufacturer Part Number
MIC5219-3.3BM5
Description
Manufacturer
Micrel Semiconductor
Datasheet

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Part Number:
MIC5219-3.3BM5
Manufacturer:
MICREL
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41 379
Part Number:
MIC5219-3.3BM5
Manufacturer:
MICREL/麦瑞
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MIC5219-3.3BM5TR
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MIC
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MM8 is a trademark of Micrel, Inc.
MicroLeadFrame and MLF are trademarks of Amkor Technology.
General Description
The MIC5219 is an effi cient linear voltage regulator with high
peak output current capability, very-low-dropout voltage, and
better than 1% output voltage accuracy. Dropout is typically
10mV at light loads and less than 500mV at full load.
The MIC5219 is designed to provide a peak output current for
start-up conditions where higher inrush current is demanded.
It features a 500mA peak output rating. Continuous output
current is limited only by package and layout.
The MIC5219 can be enabled or shut down by a CMOS or
TTL compatible signal. When disabled, power consumption
drops nearly to zero. Dropout ground current is minimized to
help prolong battery life. Other key features include reversed-
battery protection, current limiting, overtemperature shutdown,
and low noise performance with an ultra-low-noise option.
The MIC5219 is available in adjustable or fi xed output voltages
in the space-saving 6-pin (2mm × 2mm) MLF™, SOT-23-5
and MM8™ 8-pin power MSOP packages. For higher power
requirements see the MIC5209 or MIC5237.
All support documentation can be found on Micrel’s web site
at www.micrel.com.
January 2005
Typical Applications
Micrel, Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com
SHUTDOWN
E N A B L E
V
5V Ultra-Low-Noise Regulator
OUT
V
tantalum
IN
6V
5V
2.2µF
SHUTDOWN
ENABLE
470pF
1
2
3
4
MIC5219-5.0BMM
V
EN
IN
Ultra-Low-Noise Regulator
8
7
6
5
MIC5219-x.xBML
1
2
3
1
Features
• 500mA output current capability
• Low 500mV maximum dropout voltage at full load
• Extremely tight load and line regulation
• Tiny SOT-23-5 and MM8™ power MSOP-8 package
• Ultra-low-noise output
• Low temperature coeffi cient
• Current and thermal limiting
• Reversed-battery protection
• CMOS/TTL-compatible enable/shutdown control
• Near-zero shutdown current
Applications
• Laptop, notebook, and palmtop computers
• Cellular telephones and battery-powered equipment
• Consumer and personal electronics
• PC Card V
• SMPS post-regulator/DC-to-DC modules
• High-effi ciency linear power supplies
SOT-23-5 package - 500mA peak
2mm×2mm MLF package - 500mA continuous
MSOP-8 package - 500mA continuous
6
5
4
SHUTDOWN
500mA-Peak Output LDO Regulator
E N A B L E
V
C
(optional)
3.3V Ultra-Low-Noise Regulator
CC
IN
BYP
4V
and V
MIC5219-3.3BM5
MIC5219
MIC5219
PP
1
2
3
C
regulation and switching
OUT
V
OUT
4
5
470pF
2.2µF
tantalum
V
OUT
3.3V
M0371-121003

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MIC5219-3.3BM5 Summary of contents

Page 1

... High-effi ciency linear power supplies SHUTDOWN V IN MIC5219-x.xBML Ultra-Low-Noise Regulator 1 MIC5219 MIC5219 and V regulation and switching CC PP MIC5219-3.3BM5 3.3V IN OUT 2 2.2µF tantalum 3 4 470pF 3.3V Ultra-Low-Noise Regulator V OUT C C OUT BYP (optional) M0371-121003 ...

Page 2

... MIC5219-3.0YM5 MIC5219-3.0YM5 MIC5219-3.0BML MIC5219-3.0BML MIC5219-3.0BML MIC5219-3.0YML MIC5219-3.0YML MIC5219-3.0YML MIC5219-3.3BM5 MIC5219-3.3BM5 MIC5219-3.3BM5 MIC5219-3.3YM5 MIC5219-3.3YM5 MIC5219-3.3YM5 MIC5219-3.3BML MIC5219-3.3BML MIC5219-3.3BML MIC5219-3.3YML MIC5219-3.3YML MIC5219-3.3YML MIC5219-3.6BM5 MIC5219-3 ...

Page 3

... MIC5219 Pin Description Pin No. Pin No. Pin No. Pin No. Pin No. Pin No. Pin No. Pin No. Pin No. Pin No. Pin No. Pin No. Pin No. Pin No. Pin No. Pin No. Pin No. Pin No. MLF™-6 MLF™-6 MLF™-6 MLF™-6 MSOP-8 MSOP-8 MSOP-8 MSOP-8 SOT-23-5 SOT-23-5 SOT-23-5 SOT-23 ...

Page 4

... MIC5219 Absolute Maximum Ratings Supply Input Voltage (V ) ..............................–20V to +20V IN Power Dissipation (P ) ............................. Internally Limited D Junction Temperature (T ) ........................ –40°C to +125°C J Storage Temperature (T ) ........................ –65°C to +150°C S Lead Temperature (Soldering, 5 sec.) ....................... 260°C Electrical Characteristics 1.0V 4.7µ OUT OUT OUT Symbol Symbol ...

Page 5

... MIC5219 Notes: 1. Absolute maximum ratings indicate limits beyond which damage to the component may occur. Electrical specifi cations do not apply when operating the device outside of its operating ratings. The maximum allowable power dissipation is a function of the maximum junction temperature, T the junction-to-ambient thermal resistance, θ ...

Page 6

... MIC5219 Typical Characteristics Power Supply Rejection Ratio OUT -20 -40 -60 - 100µA OUT C = 1µF OUT -100 1k 10k 100k 1M 10M 1E+1 1E+2 1E+3 1E+4 1E+5 1E+6 1E+7 10 100 FREQUENCY (Hz) Power Supply Rejection Ratio -20 OUT -40 - 100µA OUT - 2.2µF OUT C = 0.01µF ...

Page 7

... MIC5219 Dropout Characteristics 3 =100µA 3.0 2.5 2.0 1 =100mA 1 =500mA 0 INPUT VOLTAGE (V) January 2005 Ground Current vs. Output Current 100 200 300 400 500 OUTPUT CURRENT (mA) Ground Current vs. Supply Voltage 3.0 2.5 2.0 1.5 I =100 mA L 1.0 0 =100µA ...

Page 8

... Ref Current Limit Thermal Shutdown MIC5219-x.xBM5/M M GND Ultra-Low-Noise Fixed Regulator OUT IN Bandgap Ref Current Limit Thermal Shutdown MIC5219BM5/MM [adj.] GND Ultra-Low-Noise Adjustable Regulator 8 OUT V OUT C OUT V OUT OUT (optional) Micrel ...

Page 9

... For example are operating the MIC5219-3.3BM5 at room temperature, with a minimum footprint layout, we can deter- mine the maximum input voltage for a set output current. ...

Page 10

... For example, if the regulator is operating normally at 50mA, but for 12.5% of the time it operates at 500mA output, the total power dissipation of the part can be easily determined. First, calculate the power dissipation of the device at 50mA. We will use the MIC5219-3.3BM5 with 5V input voltage as our example However, this is continuous power dissipation, the actual on-time for the device at 50mA is (100%-12 ...

Page 11

... Figure 2. MIC5219-x.xBM5 (SOT-23-5) on 1-inch 10 100mA 8 200mA 6 300mA 4 400mA 2 500mA 100 DUTY CYCLE (%) a. 25°C Ambient Figure 3. MIC5219-x.xBMM (MSOP-8) on Minimum Recommended Footprint 10 200mA 8 300mA 6 400mA 4 500mA 100 DUTY CYCLE (%) a. 25°C Ambient Figure 4. MIC5219-x.xBMM (MSOP-8) on 1-inch ...

Page 12

... BYP and GND to reduce output noise. Note that the minimum value of C capacitor is used. Adjustable Regulator Circuits Figure 7. Low-Noise Adjustable Voltage Regulator Figure 7 shows the basic circuit for the MIC5219 adjustable regulator. The output voltage is confi gured by selecting values for R1 and R2 using the following formula: V OUT ...

Page 13

... MIC5219 Package Information January 2005 8-Pin MSOP (MM) SOT-23-5 (M5) 13 Micrel M0371-121003 ...

Page 14

... MIC5219 MICREL, INC. 2180 FORTUNE DRIVE SAN JOSE, CA 95131 USA + 1 (408) 944-0800 TEL The information furnished by Micrel in this data sheet is believed to be accurate and reliable. However, no responsibility is assumed by Micrel for its use. Micrel reserves the right to change circuitry and specifi cations at any time without notifi cation to the customer. ...

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