MIC5219-2.8YML Micrel Inc, MIC5219-2.8YML Datasheet

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MIC5219-2.8YML

Manufacturer Part Number
MIC5219-2.8YML
Description
Manufacturer
Micrel Inc
Datasheet

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Company
Part Number
Manufacturer
Quantity
Price
Part Number:
MIC5219-2.8YML
Manufacturer:
MICREL
Quantity:
36 000
Part Number:
MIC5219-2.8YML TR
Manufacturer:
UTRON
Quantity:
506
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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MIC5219-2.8YML Summary of contents

Page 1

... 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 ...

Page 2

... MIC5219-2.6YM5 MIC5219-2.6YM5 MIC5219-2.6YM5 MIC5219-2.7BM5 MIC5219-2.7BM5 MIC5219-2.7BM5 MIC5219-2.7YM5 MIC5219-2.7YM5 MIC5219-2.7YM5 MIC5219-2.8BM5 MIC5219-2.8BM5 MIC5219-2.8BM5 MIC5219-2.8YM5 MIC5219-2.8YM5 MIC5219-2.8YM5 MIC5219-2.8BML MIC5219-2.8BML MIC5219-2.8BML MIC5219-2.8YML MIC5219-2.8YML MIC5219-2.8YML MIC5219-2.85BM5 MIC5219-2.85BM5 MIC5219-2.85BM5 MIC5219-2.85YM5 MIC5219-2.85YM5 MIC5219-2.85YM5 MIC5219-2.9BM5 MIC5219-2.9BM5 MIC5219-2.9BM5 MIC5219-2.9YM5 MIC5219-2.9YM5 MIC5219-2.9YM5 MIC5219-3.1BM5 MIC5219-3.1BM5 MIC5219-3.1BM5 MIC5219-3.1YM5 MIC5219-3.1YM5 MIC5219-3.1YM5 MIC5219-3.0BM5 MIC5219-3.0BM5 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 5–8 5–8 5–8 5–8 5– ...

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 =100µ INPUT VOLTAGE (V) 7 Micrel Ground Current vs ...

Page 8

... MIC5219 Block Diagrams (optional M0371-121003 Bandgap 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 January 2005 ...

Page 9

... The capacitor can be reduced to 0.47µF for current below 10mA, or 0.33µF for currents below 1mA. No-Load Stability The MIC5219 will remain stable and in regulation with no load (other than the internal voltage divider) unlike many other voltage regulators. This is especially important in CMOS RAM keep-alive applications ...

Page 10

... This is easily proved with some thermal calculations look at a specifi c example, it may be easier to follow. The MIC5219 can be used to provide up to 500mA continuous output current. First, calculate the maximum power dissipa- tion of the device, as was done in the thermal considerations section. Worst case thermal resistance (θ ...

Page 11

... DUTY CYCLE (%) a. 25°C Ambient 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 January 2005 10 ...

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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