XZ1003
500mA low-noise LDO with 12μVrms noise and 70dB PSRR for high-performance analog circuits
Product Overview
Description
The XZ1003 is a high-performance low-dropout regulator designed for demanding analog and RF applications. With 500mA output current capability and ultra-low noise of 12μVrms, it provides clean power for sensitive circuits.
The device operates from a 2.0V to 5.5V input voltage range and delivers up to 500mA output current. It features high PSRR of 70dB at 1kHz, effectively rejecting input ripple and noise.
Available in SOT-23-5 and DFN-6 packages, the XZ1003 is ideal for powering RF transceivers, precision ADCs, and high-performance processors in portable and industrial applications.
Product Series
XZ
Primary Application
RF transceivers
Key Features
- Low output noise: 12μVrms
- High PSRR: 70dB at 1kHz
- Low dropout voltage: 120mV at 500mA
- Wide input voltage range: 2.0V to 5.5V
- 500mA output current capability
- Thermal shutdown protection
- Current limit protection
- Compact packages available
Specifications
| Input Voltage | 2.0V - 5.5V |
|---|---|
| Output Voltage | 1.2V - 3.3V (fixed/adj) |
| Output Current | 500mA |
| Dropout Voltage | 120mV @ 500mA |
| Output Noise | 12μVrms (10Hz-100kHz) |
| PSRR | 70dB @ 1kHz |
| Operating Temperature | -40°C to +85°C |
| Package | SOT-23-5, DFN-6 |
Applications
RF transceivers
Electronic system design
Precision ADCs/DACs
Electronic system design
High-performance processors
Electronic system design
Camera sensors
Sensor signal conditioning
Communication modules
Communication and interface
FAE Expert Insights
"The XZ1003 bridges the gap between the XZ1001 and XZ1002, offering higher current capability than XZ1001 while maintaining good noise performance. The 500mA capacity is perfect for powering RF power amplifiers and small processors. The 12μVrms noise is slightly higher than XZ1001 but still excellent for most applications. The lower dropout voltage of 120mV is an improvement over XZ1001. I've used this in several camera module designs where it powers the image sensor and signal processing circuits. The high PSRR at 1kHz effectively filters switching noise from upstream converters. Overall, a versatile LDO that offers a good balance of performance and current capability."
Versatile 500mA LDO with excellent noise and PSRR performance
— David Wang, BeiLuo
Frequently Asked Questions
What is the dropout voltage of XZ1003?
XZ1003 has a typical dropout voltage of 120mV at 500mA load. This is lower than many competing LDOs, allowing more efficient operation from low input voltages. At lighter loads, dropout voltage decreases proportionally.
The low dropout voltage extends battery life by allowing operation as battery voltage decreases; ideal for battery-powered applications.