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Product attributes Property Value
Manufacturer Microchip Technology
Product Series
Packaging |
Output Configuration Obsolete
Output Type Positive
Number of Regulators Fixed
Voltage - Input (Max) 16V
Voltage - Output (Min/Fixed) 1.8V
Voltage - Output (Max) -
Voltage Dropout (Max) 0.6V @ 500mA
Current - Output 500mA
Current - Quiescent (Iq) 170 μA
Current - Supply (Max) 25 mA
PSRR 75dB (120Hz)
Control Features Enable
Protection Features Over Current, Over Temperature, Reverse Polarity
Operating Temperature -40°C ~ 125°C
Grade -
Qualification -
Mounting Type Surface Mount
Package / Case TO-263-6, D2PAK (5 Leads + Tab), TO-263BA
Supplier Device Package TO-263-5

The MIC5209-1.8BU from Microchip Technology is a fixed 1.8V low dropout linear regulator capable of delivering 500mA. With a dropout voltage of just 0.6V and an impressive 75dB PSRR at 120Hz, it ensures clean and stable power for noise-sensitive applications. The TO-263-5 package provides excellent thermal dissipation, making it suitable for a wide range of industrial and consumer electronics.

  • Superior Ripple Rejection: 75dB PSRR at 120Hz effectively filters mains-frequency noise.
  • Robust Thermal Performance: TO-263-5 package dissipates heat efficiently for reliable operation.
  • Stable 1.8V Output: Fixed output simplifies design and ensures accuracy for logic and memory circuits.
  • 500mA Current Capability: Suitable for a variety of mid-power applications.

Automotive Infotainment Systems

The MIC5209-1.8BU provides a stable 1.8V supply for microcontrollers and DSPs in car audio and navigation systems, with 75dB PSRR at 120Hz to filter alternator noise.

Networking Equipment

For routers and switches, this LDO delivers clean 1.8V power to high-speed transceivers and logic, ensuring reliable data transmission.

Industrial Control Systems

With 500mA output and robust TO-263-5 package, it powers sensors and control logic in industrial automation, offering excellent thermal performance.

Telecom Base Stations

The high PSRR of 75dB at 120Hz makes it ideal for powering sensitive PLLs and clock generators in telecom infrastructure.

Consumer Electronics

From set-top boxes to gaming consoles, the MIC5209-1.8BU provides a reliable 1.8V rail for DDR memory and core logic.

Test and Measurement

Precision instruments benefit from the low noise and high ripple rejection, ensuring accurate measurements in laboratory environments.

Q: What is the output voltage of the MIC5209-1.8BU?
A: The fixed output voltage is 1.8V.
Q: What is the maximum output current?
A: It can provide up to 500mA of output current.
Q: What is the input voltage range?
A: The input voltage range is not specified in the provided data; consult the datasheet for details.
Q: What is the dropout voltage?
A: The dropout voltage is 0.6V at a 500mA load.
Q: What is the quiescent current?
A: The quiescent current is 170 µA.
Q: What package is available?
A: It is available in a TO-263-5 package.
Base Product Number : MIC5209-1.8BU
1.8V 500mA High PSRR LDO Linear Regulator Low Dropout Microchip TO-263-5
Q: What is the output voltage of the MIC5209-1.8BU?
A: The fixed output voltage is 1.8V.
Q: What is the maximum output current?
A: It can provide up to 500mA of output current.
Q: What is the input voltage range?
A: The input voltage range is not specified in the provided data; consult the datasheet for details.
Q: What is the dropout voltage?
A: The dropout voltage is 0.6V at a 500mA load.
Q: What is the quiescent current?
A: The quiescent current is 170 µA.
Q: What package is available?
A: It is available in a TO-263-5 package.