Richtek USA Inc. RT9053AGB
| Quantity | Unit Price | Total Price |
|---|---|---|
| 1 | $0.67 | $0.67 |
| 15+ | $0.64 | $9.60 |
| 25+ | $0.63 | $15.75 |
| 50+ | $0.60 | $30.00 |
| 100+ | $0.53 | $53.00 |
| N+ | $0.11 | Price Inquiry |
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| Product attributes | Property Value |
| Manufacturer | Richtek USA Inc. |
| Product Series | |
| Packaging | Cut Tape (CT) | Tape & Reel (TR) |
| Output Configuration | Positive |
| Output Type | Adjustable |
| Number of Regulators | 1 |
| Voltage - Input (Max) | 5.5V |
| Voltage - Output (Min/Fixed) | 0.8V |
| Voltage - Output (Max) | 5.15V |
| Voltage Dropout (Max) | 0.35V @ 400mA |
| Current - Output | 400mA |
| Current - Quiescent (Iq) | 50 µA |
| Current - Supply (Max) | - |
| PSRR | 56dB ~ 35dB (1kHz ~ 10kHz) |
| Control Features | Enable |
| Protection Features | Over Current, Over Temperature |
| Operating Temperature | -40°C ~ 85°C |
| Grade | - |
| Qualification | - |
| Mounting Type | Surface Mount |
| Package / Case | SC-74A, SOT-753 |
| Supplier Device Package | SOT-23-5 |
| ROHS |  |
The RT9053AGB from Richtek is a low-dropout linear regulator providing a fixed 5.15V output. With a 400mA current rating and a dropout voltage of only 350mV, it efficiently regulates from input voltages as low as 0.8V. The SOT-23-5 package and 50µA quiescent current make it suitable for space-limited, power-sensitive designs requiring a stable 5V-class rail.
- High Current Capacity: 400mA output supports a wide range of digital and analog loads.
- Low Dropout: 350mV dropout at full load maximizes efficiency in low-headroom designs.
- Wide Input Range: Operates from 0.8V to 5.5V, offering flexibility in multi-rail systems.
- Good Noise Rejection: 56dB PSRR at 1kHz helps maintain clean output for sensitive circuits.
USB-Powered Peripherals
The 5.15V output is ideal for powering USB 2.0/3.0 peripherals that require a slightly higher rail to compensate for cable drops, with 400mA supporting most bus-powered devices.
FPGA Core Supplies
For low-voltage FPGA cores needing a stable 5.15V auxiliary rail, the RT9053AGB provides clean power with 56dB PSRR at 1kHz, reducing noise coupling.
Industrial Sensor Interfaces
In 24V industrial systems, this LDO can step down from an intermediate 5.5V rail to 5.15V for analog sensor front-ends, ensuring accurate measurements.
Automotive Infotainment
With a wide input range starting at 0.8V, it can operate from a pre-regulated 5V supply in car head units, powering audio codecs and display drivers.
Networking Equipment
Powering PHY transceivers and switch ICs that require a 5.15V bias, the low dropout ensures stable operation even when the input rail sags.
- Q: What is the output voltage of the RT9053AGB?
- A: This LDO provides a fixed 5.15V output.
- Q: What is the maximum output current?
- A: It can deliver up to 400mA of output current.
- Q: What is the input voltage range?
- A: The input voltage range is from 0.8V (minimum) up to 5.5V (maximum).
- Q: What is the dropout voltage?
- A: Dropout is typically 350mV at a 400mA load.
- Q: What is the quiescent current?
- A: The quiescent current is 50µA, balancing efficiency with fast transient response.
- Q: What package is available?
- A: It is offered in a SOT-23-5 package.
RT9053AGB.pdf
- Q: What is the output voltage of the RT9053AGB?
- A: This LDO provides a fixed 5.15V output.
- Q: What is the maximum output current?
- A: It can deliver up to 400mA of output current.
- Q: What is the input voltage range?
- A: The input voltage range is from 0.8V (minimum) up to 5.5V (maximum).
- Q: What is the dropout voltage?
- A: Dropout is typically 350mV at a 400mA load.
- Q: What is the quiescent current?
- A: The quiescent current is 50µA, balancing efficiency with fast transient response.
- Q: What package is available?
- A: It is offered in a SOT-23-5 package.
