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Product attributes Property Value
Manufacturer ETEK MICROELECTRONICS
Product Series ET5H7XX
Packaging Tape & Reel (TR) |
Output Configuration Positive
Output Type Fixed
Number of Regulators 1
Voltage - Input (Max) 60V
Voltage - Output (Min/Fixed) 3.3V
Voltage - Output (Max) -
Voltage Dropout (Max) 1.2V @ 300mA
Current - Output 300mA
Current - Quiescent (Iq) 10 µA
Current - Supply (Max) -
PSRR 50dB (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 ET5H733 is a fixed 3.3V low dropout linear regulator capable of delivering 300mA. Its ultra-low 10 µA quiescent current makes it an excellent choice for battery-operated devices. With a dropout voltage of just 1.2V at full load and 50dB PSRR at 1kHz, it provides clean, stable power in a compact SOT-23-5 package.

  • Extended Battery Life: Ultra-low 10 µA quiescent current minimizes standby power consumption in portable devices.
  • Stable Output: 50dB PSRR at 1kHz filters supply noise, ensuring clean power for sensitive electronics.
  • Compact Footprint: SOT-23-5 package saves PCB space for space-constrained designs.
  • Sufficient Current: 300mA output supports a wide range of microcontrollers, sensors, and wireless modules.

Battery-Powered IoT Sensors

The ultra-low 10 µA quiescent current extends battery life in always-on IoT sensor nodes, while the 300mA output supports intermittent wireless transmissions.

Portable Medical Devices

The stable 3.3V rail and 50dB PSRR at 1kHz ensure clean power for sensitive analog front-ends in glucose monitors and pulse oximeters.

Wearable Electronics

The compact SOT-23-5 package and low dropout of 1.2V allow efficient regulation from a single Li-ion cell down to 4.5V, ideal for smartwatches and fitness bands.

Industrial Control Modules

Provides a reliable 3.3V logic supply for microcontrollers and sensors in industrial automation, with sufficient current for driving small relays or LEDs.

RF Transceiver Power

The 50dB PSRR at 1kHz minimizes supply noise that could otherwise degrade RF signal integrity in Bluetooth and Zigbee modules.

Automotive Interior Lighting

Regulates vehicle battery voltage to a stable 3.3V for LED driver circuits, ensuring consistent brightness despite input fluctuations.

Q: What is the output voltage of the ET5H733?
A: The ET5H733 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 technical data; please refer to the datasheet for this parameter.
Q: What is the dropout voltage?
A: The dropout voltage is 1.2V at a 300mA load.
Q: What is the quiescent current?
A: The quiescent current is a low 10 µA, making it suitable for battery-powered applications.
Q: What package is available?
A: The ET5H733 is available in a SOT-23-5 package.
Base Product Number : ET5H733
3.3V 300mA ETEK LDO Linear Regulator Low Quiescent Current SOT-23-5
Q: What is the output voltage of the ET5H733?
A: The ET5H733 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 technical data; please refer to the datasheet for this parameter.
Q: What is the dropout voltage?
A: The dropout voltage is 1.2V at a 300mA load.
Q: What is the quiescent current?
A: The quiescent current is a low 10 µA, making it suitable for battery-powered applications.
Q: What package is available?
A: The ET5H733 is available in a SOT-23-5 package.