Micrel Inc. MIC5259-1.5YD5

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Product attributes Property Value
Manufacturer Micrel Inc.
Product Series
Packaging Bulk |
Output Configuration Positive
Output Type Fixed
Number of Regulators 1
Voltage - Input (Max) 6V
Voltage - Output (Min/Fixed) 1.5V
Voltage - Output (Max) -
Voltage Dropout (Max) 0.55V @ 300mA
Current - Output 300mA
Current - Quiescent (Iq) 150 µA
Current - Supply (Max) 250 µA
PSRR 65dB ~ 53dB (10Hz ~ 10kHz)
Control Features Enable
Protection Features Over Current, Over Temperature, Under Voltage Lockout (UVLO)
Operating Temperature -40°C ~ 125°C
Grade -
Qualification -
Mounting Type Surface Mount
Package / Case SOT-23-5 Thin, TSOT-23-5
Supplier Device Package TSOT-23-5

The MIC5259-1.5YD5 is a fixed 1.5V low dropout linear regulator delivering up to 300mA of output current. It features a quiescent current of 150µA and a dropout voltage of 550mV at full load. The device offers excellent power supply rejection of 65dB at 10Hz, ensuring clean power for sensitive digital and analog circuits. Packaged in a TSOT-23-5, this LDO is well-suited for low-voltage, medium-current applications.

  • Low-Voltage Output: 1.5V rail is perfect for modern low-power digital ICs and memory termination.
  • High PSRR: 65dB at 10Hz rejects low-frequency noise for stable operation.
  • 300mA Capacity: Supports medium-current loads in portable devices.
  • Compact Form Factor: TSOT-23-5 package enables space-efficient PCB layouts.

Low-Voltage Digital Cores

The 1.5V output is ideal for powering the core voltage of low-power FPGAs, CPLDs, and application processors in portable devices, delivering up to 300mA for digital logic.

DDR Memory Termination

In embedded systems with DDR2/DDR3 memory, this LDO can provide the 1.5V VTT rail for memory termination, ensuring signal integrity with low noise.

Portable Medical Devices

For glucose monitors and portable diagnostic tools, the MIC5259-1.5YD5 provides stable 1.5V power for microcontrollers and sensors, with high PSRR for accurate measurements.

Wireless Sensor Networks

In Zigbee and Thread nodes, this regulator powers the 1.5V logic section of the radio SoC, with 65dB PSRR at 10Hz reducing interference from the battery supply.

Battery-Powered Instruments

Handheld multimeters and calibration tools benefit from the low dropout and high PSRR, ensuring accurate readings even as the battery discharges.

Consumer IoT Devices

Smart plugs, light bulbs, and home automation sensors use this LDO for their 1.5V control logic, providing reliable operation in always-on applications.

Q: What is the output voltage of the MIC5259-1.5YD5?
A: The fixed output voltage is 1.5V.
Q: What is the maximum output current?
A: It can deliver up to 300mA.
Q: What is the input voltage range?
A: The input voltage range is not specified in the provided data; refer to the datasheet.
Q: What is the dropout voltage?
A: The dropout voltage is 550mV at 300mA load.
Q: What is the quiescent current?
A: The quiescent current is 150µA.
Q: What package is available?
A: It comes in a TSOT-23-5 package.
Base Product Number : MIC5259-1.5YD5
1.5V 300mA High PSRR LDO Linear Regulator Micrel TSOT-23-5
Q: What is the output voltage of the MIC5259-1.5YD5?
A: The fixed output voltage is 1.5V.
Q: What is the maximum output current?
A: It can deliver up to 300mA.
Q: What is the input voltage range?
A: The input voltage range is not specified in the provided data; refer to the datasheet.
Q: What is the dropout voltage?
A: The dropout voltage is 550mV at 300mA load.
Q: What is the quiescent current?
A: The quiescent current is 150µA.
Q: What package is available?
A: It comes in a TSOT-23-5 package.