ETEK MICROELECTRONICS ET63333YB
| Quantity | Unit Price | Total Price |
|---|---|---|
| 1 | $0.12 | $0.12 |
| 15+ | $0.12 | $1.80 |
| 25+ | $0.12 | $3.00 |
| 50+ | $0.11 | $5.50 |
| 100+ | $0.10 | $10.00 |
| N+ | $0.02 | Price Inquiry |
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| Product attributes | Property Value |
| Manufacturer | ETEK MICROELECTRONICS |
| Product Series | ET633XX |
| Packaging | Tape & Reel (TR) | |
| Output Configuration | Positive |
| Output Type | Fixed |
| Number of Regulators | 1 |
| Voltage - Input (Max) | 5.5V |
| Voltage - Output (Min/Fixed) | 3.3V |
| Voltage - Output (Max) | - |
| Voltage Dropout (Max) | 0.45V @ 300mA |
| Current - Output | 300mA |
| Current - Quiescent (Iq) | 900 nA |
| Current - Supply (Max) | - |
| PSRR | 45dB (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 | 4-XDFN Exposed Pad |
| Supplier Device Package | 4-DFN (1x1) |
| ROHS |
The ET63333YB from ETEK Microelectronics is a fixed 3.3V ultra-low quiescent current LDO regulator. It delivers up to 300mA with an impressively low dropout voltage of just 0.45V at full load. With a quiescent current of only 900 nA, it is engineered for battery-powered and energy-efficient applications. The miniature 4-DFN (1x1mm) package makes it an excellent choice for compact, portable devices requiring a stable 3.3V supply.
- Ultra-Low Quiescent Current (900 nA): Maximizes battery life in always-on IoT and wearable devices.
- Low Dropout (0.45V @ 300mA): Ensures efficient operation even when the input voltage is close to 3.3V.
- High Output Current (300mA): Supports a wide range of loads, from sensors to wireless modules.
- Compact 4-DFN (1x1mm) Package: Ideal for space-constrained designs without compromising performance.
IoT Edge Devices
The 3.3V output is the standard for many IoT sensors and microcontrollers, and the 900 nA quiescent current ensures minimal power draw during idle periods.
Battery-Powered Peripherals
Ideal for wireless mice, keyboards, and game controllers that require a stable 3.3V rail with long battery life.
Portable Instrumentation
Provides clean power for handheld multimeters, thermometers, and other field instruments that operate from 3.7V Li-ion batteries.
Smart Home Hubs
Powers Zigbee, Z-Wave, and Wi-Fi modules in smart home devices, ensuring reliable communication with low standby power.
Wearable Fitness Trackers
The tiny package and low dropout make it suitable for fitness bands and smartwatches that need efficient 3.3V regulation.
Embedded Systems
Provides a stable 3.3V rail for logic circuits, sensors, and communication interfaces in various embedded applications.
- Q: What is the output voltage of the ET63333YB?
- A: The ET63333YB is a fixed output LDO regulator providing 3.3V.
- Q: What is the maximum output current?
- A: It can deliver up to 300mA of output current.
- Q: What is the input voltage range?
- A: The input voltage range is not specified in the provided data, but it must be higher than 3.3V plus dropout.
- Q: What is the dropout voltage?
- A: The dropout voltage is 0.45V at 300mA load.
- Q: What is the quiescent current?
- A: The quiescent current is extremely low at 900 nA (0.9 µA).
- Q: What package is available?
- A: It comes in a tiny 4-DFN (1x1mm) package.
- Q: What is the output voltage of the ET63333YB?
- A: The ET63333YB is a fixed output LDO regulator providing 3.3V.
- Q: What is the maximum output current?
- A: It can deliver up to 300mA of output current.
- Q: What is the input voltage range?
- A: The input voltage range is not specified in the provided data, but it must be higher than 3.3V plus dropout.
- Q: What is the dropout voltage?
- A: The dropout voltage is 0.45V at 300mA load.
- Q: What is the quiescent current?
- A: The quiescent current is extremely low at 900 nA (0.9 µA).
- Q: What package is available?
- A: It comes in a tiny 4-DFN (1x1mm) package.

ET63333YB.pdf