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Product attributes Property Value
Manufacturer ETEK MICROELECTRONICS
Product Series ET5H5XX
Packaging Tape & Reel (TR) |
Output Configuration Positive
Output Type Fixed
Number of Regulators 1
Voltage - Input (Max) 40V
Voltage - Output (Min/Fixed) 3.3V
Voltage - Output (Max) -
Voltage Dropout (Max) 1.5V @ 300mA
Current - Output 300mA
Current - Quiescent (Iq) 6.5 µA
Current - Supply (Max) -
PSRR 52dB (1kHz)
Control Features Enable
Protection Features Over Current, Over Temperature
Operating Temperature -40°C ~ 85°C (TA)
Grade -
Qualification -
Mounting Type Surface Mount
Package / Case SC-74A, SOT-753
Supplier Device Package SOT-23-5
ROHS RoHS Compliant - Hazardous Substance Free Electronic Components | HQICKEY

The ET5H533B is a fixed 3.3V low dropout linear regulator from ETEK Microelectronics, delivering 300mA of output current. With a quiescent current of only 6.5 µA and a dropout voltage of 1.5V at full load, it balances performance and efficiency for battery-operated and industrial applications. The SOT-23-5 package offers a compact, reliable solution.

  • Low Quiescent Current: 6.5 µA minimizes power loss in standby mode.
  • 300mA Output: Handles moderate loads for industrial and consumer devices.
  • Wide Operating Margin: 1.5V dropout allows operation from higher input voltages.
  • Compact SOT-23-5: Fits space-constrained PCB designs.

Automotive Body Electronics

The ET5H533B provides a stable 3.3V rail for automotive body control modules, with 6.5 µA quiescent current reducing battery drain when the vehicle is off.

Smart Home Hubs

In smart home devices like thermostats and security panels, this regulator powers 3.3V sensors and wireless modules with reliable performance.

Industrial Control Panels

With 300mA output, it supplies PLC I/O modules and HMI displays, ensuring consistent operation in industrial environments.

Portable Test Equipment

The low quiescent current and SOT-23-5 package make it suitable for battery-operated calibration tools and field testers.

LED Lighting Controllers

For smart LED drivers, the ET5H533B provides a clean 3.3V supply for the control IC, maintaining dimming accuracy and communication stability.

Q: What is the output voltage of the ET5H533B?
A: The ET5H533B provides a fixed 3.3V output.
Q: What is the maximum output current?
A: It can deliver up to 300mA of continuous output current.
Q: What is the input voltage range?
A: The input voltage range is not specified in the provided data; please refer to the official datasheet.
Q: What is the dropout voltage?
A: The dropout voltage is 1.5V at a 300mA load.
Q: What is the quiescent current?
A: The quiescent current is 6.5 µA.
Q: What package is available?
A: The ET5H533B is available in a SOT-23-5 package.
Base Product Number : ET5H533B
3.3V 300mA ETEK LDO Linear Regulator Low Quiescent Current SOT-23-5
Q: What is the output voltage of the ET5H533B?
A: The ET5H533B provides a fixed 3.3V output.
Q: What is the maximum output current?
A: It can deliver up to 300mA of continuous output current.
Q: What is the input voltage range?
A: The input voltage range is not specified in the provided data; please refer to the official datasheet.
Q: What is the dropout voltage?
A: The dropout voltage is 1.5V at a 300mA load.
Q: What is the quiescent current?
A: The quiescent current is 6.5 µA.
Q: What package is available?
A: The ET5H533B is available in a SOT-23-5 package.