MIC5209
500mA Low-Noise LDO Regulator
General Description
The MIC5209 is an efficient linear voltage regulator with
very low dropout voltage, typically 10mV at light loads and
less than 500mV at full load, with better than 1% output
voltage accuracy
Designed especially for hand-held, battery-powered
devices, the MIC5209 features low ground current to help
prolong battery life. An enable/shutdown pin on SO-8 and
TO-263-5 versions can further improve battery life with
near-zero shutdown current.
Key features include reversed-battery protection, current
limiting, overtemperature shutdown, ultra-low-noise
capability (SO-8 and TO-263-5 versions), and availability
in thermally-efficient packaging. The MIC5209 is available
in adjustable or fixed output voltages.
Datasheets and support documentation are available on
Micrel’s web site at:
www.micrel.com.
Features
•
Output voltage range: 1.8V
−
15V
®
•
Meets Intel Slot 1 and Slot 2 requirements
•
Guaranteed 500mA output over the full operating
temperature range
•
Low 500mV maximum dropout voltage at full load
•
Extremely tight load and line regulation
•
Thermally-efficient surface-mount package
•
Low temperature coefficient
•
Current and thermal limiting
•
Reversed-battery protection
•
No-load stability
•
1% output accuracy
•
Ultra-low-noise capability in SO-8 and TO-263-5
•
Ultra-small 3mm × 3mm DFN package
Applications
•
•
•
•
•
•
Pentium II Slot 1 and Slot 2 support circuits
Laptop, notebook, and palmtop computers
Cellular telephones
Consumer and personal electronics
SMPS post-regulator/DC-to-DC modules
High-efficiency linear power supplies
Typical Application
3.3V Nominal Input Slot 1 Power Supply
Ultra-Low Noise 5V Regulator
Intel is a registered trademark of Intel Corporation.
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (408) 944-0800 • fax + 1 (408) 474-1000 •
http://www.micrel.com
May 19, 2015
Revision 4.1
Micrel, Inc.
MIC5209
Ordering Information
Part Number
MIC5209-2.5YS
MIC5209-3.0YS
MIC5209-3.3YS
MIC5209-3.6YS
MIC5209-4.2YS
MIC5209-5.0YS
MIC5209-1.8YM
MIC5209-2.5YM
MIC5209-3.0YM
MIC5209-3.3YM
MIC5209-3.6YM
MIC5209-5.0YM
MIC5209YM
MIC5209-1.8YU
MIC5209-2.5YU
MIC5209-3.0YU
MIC5209-3.3YU
MIC5209-3.6YU
MIC5209-5.0YU
MIC5209YU
(1)
(1)
Voltage
2.5V
3.0V
3.3V
3.6V
4.2V
5.0V
1.8V
2.5V
3.0V
3.3V
3.6V
5.0V
Adjustable (2.5V
−
15.0V)
Adjustable (1.8V
−
2.5V)
1.8V
2.5V
3.0V
3.3V
3.6V
5.0V
Adjustable (2.5V
−
15.0V)
Adjustable (1.8V
−
2.5V)
Adjustable (2.5V
−
15.0V)
Adjustable (1.8V
−
2.5V)
Junction Temperature Range
−40°C
to +125°C
−40°C
to +125°C
−40°C
to +125°C
−40°C
to +125°C
−40°C
to +125°C
−40°C
to +125°C
0°C to +125°C
−40°C
to +125°C
−40°C
to +125°C
−40°C
to +125°C
−40°C
to +125°C
−40°C
to +125°C
−40°C
to +125°C
0°C to +125°C
0°C to +125°C
−40°C
to +125°C
−40°C
to +125°C
−40°C
to +125°C
−40°C
to +125°C
−40°C
to +125°C
−40°C
to +125°C
0°C to +125°C
−40°C
to +125°C
0°C to +125°C
Package
SOT-223
SOT-223
SOT-223
SOT-223
SOT-223
SOT-223
SOIC-8
SOIC-8
SOIC-8
SOIC-8
SOIC-8
SOIC-8
SOIC-8
TO-263-5
TO-263-5
TO-263-5
TO-263-5
TO-263-5
TO-263-5
TO-263-5
Pb-Free
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
MIC5209YML
Note:
1. Contact Micrel for availability.
8-Pin DFN
X
May 19, 2015
2
Revision 4.1
Micrel, Inc.
MIC5209
Pin Configuration
MIC5209-x.xYS
SOT-223
Fixed Voltages
MIC5209YML
8-Pin 3mm × 3mm DFN
Adjustable Voltages
MIC5209-x.xYM
SO-8
Fixed Voltages
MIC5209-x.xYU
TO-263-5
Fixed Voltages
MIC5209YM
SO-8
Adjustable Voltages
MIC5209YU
TO-263-5
Adjustable Voltages
May 19, 2015
3
Revision 4.1
Micrel, Inc.
MIC5209
Pin Description
Pin Number
8-Pin DFN
1, 2
7
Pin Number
SOT-223
1
2, TAB
Pin Number
SO-8
2
5
−
8
Pin Number
TO-263-5
2
3, TAB
Pin Name
IN
GND
Pin Function
Supply Input.
Ground: SOT-223 Pin 2 and TAB are
internally connected. SO-8 Pins 5 through 8
are internally connected.
Regulator Output: Pins 3 and 4 must be tied
together.
Not Connected.
Enable (Input): CMOS-compatible control
input. Logic High = Enable; Logic Low =
Shutdown.
Reference Bypass: Connect external 470pF
capacitor to GND to reduce output noise. Can
be left open. For 1.8V or 2.5V operation, see
Application Information.
Adjust (Input): Feedback input. Connect to
resistive voltage-divider network.
Exposed Thermal Pad: Connect to GND for
best thermal performance.
3, 4
5
8
3
3
4
OUT
NC
1
1
EN
4 (Fixed)
5 (Fixed)
BYP
6
EP
4 (Adjustable)
5 (Adjustable)
ADJ
ePad
May 19, 2015
4
Revision 4.1
Micrel, Inc.
MIC5209
Absolute Maximum Ratings
(2)
Supply Voltage (V
IN
) .......................................
−20V
to +20V
(4)
Power Dissipation (P
D
). .......................... Internally Limited
Junction Temperature (T
J
)
All Except 1.8V ...................................
−40°C
to +125°C
1.8V Only ................................................ 0°C to +125°C
Lead Temperature (soldering, 5s) .............................. 260°C
Storage Temperature (T
S
) .........................
−65°C
to +150°C
ESD Rating
SOT-223 ........................................ 2kV HBM/300V MM
DFN, SOIC-8 ................................. 5kV HBM/100V MM
Operating Ratings
(3)
Supply Voltage (V
IN
) ...................................... +2.5V to +16V
Adjustable Output Voltage (V
OUT
) Range ..... +1.8V to 15.0V
Junction Temperature (T
J
)
2.5V
−
15.0V ....................................... –40°C to +125°C
1.8V
≤
V
OUT
<
2.5V.................................. 0°C to +125°C
Package Thermal Resistance ....................................
Note 4
Electrical Characteristics
V
IN
= V
OUT
+ 1V, C
OUT
= 4.7µF, I
OUT
= 100µA; T
J
= 25°C,
bold
values indicate –40°C
≤
T
J
≤
+125°C, except 0°C
≤
T
J
≤
+125°C
for 1.8V
≤
V
OUT
<
2.5V, unless noted.
Symbol
V
OUT
∆V
OUT
/∆T
Parameter
Output Voltage Accuracy
Output Voltage Temperature Co-Efficient
Line Regulation
∆V
OUT
/ V
OUT
Load Regulation
I
OUT
= 100µA to 500mA
(6)
Condition
Variation from nominal V
OUT
Note 5
V
IN
= V
OUT
+ 1V to 16V
Min.
−1
−2
Typ.
Max.
1
2
Units
%
ppm/°C
40
0.009
0.05
0.1
0.05
0.5
0.7
10
60
80
115
175
250
165
300
400
350
500
600
%/V
%
I
OUT
= 100µA
I
OUT
= 50mA
V
IN
−
V
OUT
Dropout Voltage
(7)
mV
I
OUT
= 150mA
I
OUT
= 500mA
Notes:
2. Exceeding the absolute maximum ratings may damage the device.
3. The device is not guaranteed to function outside its operating ratings.
4. The maximum allowable power dissipation at any T
A
(ambient temperature) is calculated using: P
D
(MAX)
= (T
J
(MAX)
– T
A
)
θ
JA
. Exceeding the maximum
allowable power dissipation will result in excessive die temperature, and the regulator will go into thermal shutdown. See
Table 1
and the “
Thermal
Considerations”
sub-section in
Application Information
for details.
5. Output voltage temperature coefficient is the worst case voltage change divided by the total temperature range.
6. Regulation is measured at constant junction temperature using low duty cycle pulse testing. Parts are tested for load regulation in the load range
from 100µA to 500mA. Changes in output voltage due to heating effects are covered by the thermal regulation specification.
7. Dropout voltage is defined as the input to output differential at which the output voltage drops 2% below its nominal value measured at 1V
differential.
8. Ground pin current is the regulator quiescent current plus pass transistor base current. The total current drawn from the supply is the sum of the load
current plus the ground pin current.
9.
V
EN
is the voltage externally applied to devices with the EN (enable) input pin. [SO-8 (M) and TO-263-5 (U) packages only.]
May 19, 2015
5
Revision 4.1
PCB设计
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