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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 6-WDFN Exposed Pad
Supplier Device Package 6-WDFN (2x2)
ROHS RoHS Compliant - Hazardous Substance Free Electronic Components | HQICKEY

The RT9053AZQW from Richtek is a 400mA adjustable LDO linear regulator with an output up to 5.15V. Featuring a low dropout of 0.35V and a quiescent current of 50 µA, it balances efficiency and performance. The 6-WDFN package is ideal for space-constrained applications.

  • High Output Current: 400mA supports a wide range of loads.
  • Low Dropout: 0.35V @ 400mA maximizes efficiency.
  • Good PSRR: 56dB at 1kHz reduces noise.
  • Compact WDFN: 2x2mm package saves space.

FPGA Core Power

400mA output and low dropout make it suitable for powering FPGA core logic from a 1.8V rail.

Portable SSD Controllers

Provides clean, stable power to SSD controllers, with PSRR of 56dB at 1kHz to reduce switching noise.

Battery-Powered Cameras

The 50 µA quiescent current and small WDFN package fit compact camera modules.

Industrial Sensors

Wide adjustable output range allows flexible sensor supply voltages.

Networking Equipment

Stable output for PHY transceivers, with good PSRR up to 10kHz.

Portable Test Equipment

Low dropout extends battery life in handheld multimeters.

Q: What is the output voltage range?
A: The RT9053AZQW offers an adjustable output up to 5.15V.
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 can be as low as 0.8V, supporting low-voltage rails.
Q: What is the dropout voltage?
A: Dropout is typically 0.35V at 400mA, ensuring efficient operation.
Q: What is the quiescent current?
A: Quiescent current is 50 µA, balancing performance and power consumption.
Q: What package is available?
A: It comes in a compact 6-WDFN (2x2mm) package.
Base Product Number : RT9053A
400mA 6-WDFN Adjustable LDO Linear Regulator Low Dropout Richtek RT9053A
Q: What is the output voltage range?
A: The RT9053AZQW offers an adjustable output up to 5.15V.
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 can be as low as 0.8V, supporting low-voltage rails.
Q: What is the dropout voltage?
A: Dropout is typically 0.35V at 400mA, ensuring efficient operation.
Q: What is the quiescent current?
A: Quiescent current is 50 µA, balancing performance and power consumption.
Q: What package is available?
A: It comes in a compact 6-WDFN (2x2mm) package.