ETEK MICROELECTRONICS ET5H533F
| Quantity | Unit Price | Total Price |
|---|---|---|
| 1 | $0.14 | $0.14 |
| 15+ | $0.14 | $2.10 |
| 25+ | $0.14 | $3.50 |
| 50+ | $0.13 | $6.50 |
| 100+ | $0.11 | $11.00 |
| N+ | $0.02 | Price Inquiry |
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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 | TO-243AA |
| Supplier Device Package | SOT-89-3 |
| ROHS |
The ET5H533F is a fixed 3.3V LDO regulator from ETEK Microelectronics, capable of delivering 300mA. It features an ultra-low quiescent current of 6.5µA, making it excellent for battery-powered applications. The dropout voltage is 1.5V at full load, and PSRR is 52dB at 1kHz. Housed in a SOT-89-3 package, it balances performance and thermal dissipation.
- Ultra-Low IQ (6.5µA): Extends battery life in standby and active modes, ideal for IoT.
- High Current (300mA): Supports power-hungry wireless modules and sensors.
- Stable 3.3V Output: Ensures reliable operation for digital logic and RF circuits.
- SOT-89-3 Package: Good thermal performance for moderate power dissipation.
Battery-Powered Microcontrollers
With 6.5µA quiescent current, it's ideal for always-on MCU systems in remote sensors, preserving battery life for years.
Wearable Fitness Trackers
The 300mA capability supports Bluetooth SoCs and display drivers while maintaining low standby power.
Smart Home Sensors
Provides stable 3.3V for Zigbee/Thread modules in thermostats and door sensors, with low dropout for battery operation.
Portable Medical Devices
Powers glucose meters and pulse oximeters with reliable 3.3V rail, ensuring consistent operation from alkaline or Li-ion batteries.
Energy Harvesting Systems
Low quiescent current makes it suitable for solar or vibration-powered devices where every microamp counts.
- Q: What is the output voltage of the ET5H533F?
- A: It provides a fixed 3.3V output.
- 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 explicitly specified; typically up to 5.5V for 3.3V LDOs, but verify with datasheet.
- Q: What is the dropout voltage?
- A: Dropout is 1.5V at 300mA load.
- Q: What is the quiescent current?
- A: The quiescent current is extremely low at 6.5µA.
- Q: What package is available?
- A: It comes in a SOT-89-3 package.
- Q: What is the output voltage of the ET5H533F?
- A: It provides a fixed 3.3V output.
- 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 explicitly specified; typically up to 5.5V for 3.3V LDOs, but verify with datasheet.
- Q: What is the dropout voltage?
- A: Dropout is 1.5V at 300mA load.
- Q: What is the quiescent current?
- A: The quiescent current is extremely low at 6.5µA.
- Q: What package is available?
- A: It comes in a SOT-89-3 package.

ET5H533F.pdf