MIC5209
500 mA Low-Noise LDO Regulator
Features
• Output Voltage Range: 1.8V – 15V
• Meets Intel
®
Slot 1 and Slot 2 Requirements
• Guaranteed 500 mA Output Over the Full
Operating Temperature Range
• Low 500 mV 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 SOIC-8 and DDPAK
• Ultra-Small 3 mm × 3 mm DFN Package
General Description
The MIC5209 is an efficient linear voltage regulator
with very low dropout voltage, typically 10 mV at light
loads and less than 500 mV 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
the SOIC-8 and DDPAK 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 (SOIC-8 and DDPAK
versions), and is available in thermally efficient
packaging. The MIC5209 is available in adjustable or
fixed output voltages.
Applications
•
•
•
•
•
•
Pentium II Slot 1 and Slot 2 Support Circuits
Laptop, Notebook, and Palmtop Computers
Cellular Telephones
Consumer and Personal Electronics
SMPS Post-Regulator and DC/DC Modules
High-Efficiency Linear Power Supplies
Typical Application Circuits
3.3V N
OMINAL
I
NPUT
S
LOT
1
P
OWER
S
UPPLY
MIC5209-2.5YS
U
LTRA
-L
OW
N
OISE
5V R
EGULATOR
ENABLE
SHUTDOWN
V
IN
6.0V
V
OUT
5.0V
MIC5209-5.0YM
1
2
3
4
470pF
(OPTIONAL)
8
7
6
5
1
V
IN
3.0V
0.1μF
2
3
V
OUT
2.5V ±1%
22μF
TANTALUM
22μF
TANTALUM
2017 Microchip Technology Inc.
DS20005720A-page 1
MIC5209
1.0
ELECTRICAL CHARACTERISTICS
Absolute Maximum Ratings †
Supply Voltage (V
IN
).................................................................................................................................... –20V to +20V
Power Dissipation (P
D
) (Note
1).............................................................................................................Internally
Limited
ESD Rating (SOT-223)..................................................................................................................... 2 kV HBM/300V MM
ESD Rating (DFN, SOIC-8).............................................................................................................. 5 kV HBM/100V MM
Operating Ratings ‡
Supply Voltage (V
IN
)................................................................................................................................... +2.5V to +16V
Adjustable Output Voltage Range (V
OUT
) .................................................................................................. +1.8V to +15V
† Notice:
Stresses above those listed under “Absolute Maximum Ratings” may cause permanent damage to the device.
This is a stress rating only and functional operation of the device at those or any other conditions above those indicated
in the operational sections of this specification is not intended. Exposure to maximum rating conditions for extended
periods may affect device reliability.
‡ Notice:
The device is not guaranteed to function outside its operating ratings.
Note 1:
The maximum allowable power dissipation at any T
A
(ambient temperature) is P
D(max)
= (T
J(max)
– T
A
) x
θ
JA
.
Exceeding the maximum allowable power dissipation will cause excessive die temperature, and the regula-
tor will go into thermal shutdown. See
Table 4-1
and the
Thermal Considerations
sub-section in
Applications
Information
for details.
DS20005720A-page 4
2017 Microchip Technology Inc.
DSP 与 ARM 处理器
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