The RTQ2533W is a high-current (3A), low-noise (6.8μVRMS), high accuracy (1% over line, load, and temperature), low-dropout linear regulator (LDO) capable of sourcing 3A with extremely low dropout (max. 180mV). The device output voltage is pin-selectable (up to 3.95V) using a PCB layout without the need of external resistors, thus reducing overall component count. Designers can achieve higher output voltage with the use of external resistor divider. The device supports single input supply voltage as low to 1.1V that makes it easy to use. The low noise, high PSRR and high output current capability makes the RTQ2533W ideal to power noise-sensitive devices such as analog-to-digital converters (ADCs), digital-to-analog converters (DACs), and RF components. With very high accuracy, remote sensing, and soft-start capabilities to reduce inrush current, the RTQ2533W is ideal for powering digital loads such as FPGAs, DSPs, and ASICs. The external enable control and power good indicator function makes the control sequence easier. The output noise immunity is enhanced by adding external bypass capacitor on the NR/SS pin. The device is fully specified over the temperature range of TJ = −40°C to 125°C and is offered in a VQFN-20L 3.5x3.5 package.
General Description
The RTQ2533W is a high-current (3A), low-noise (6.8μVRMS), high accuracy (1% over line, load, and temperature), low-dropout linear regulator (LDO) capable of sourcing 3A with extremely low dropout (max. 180mV). The device output voltage is pin-selectable (up to 3.95V) using a PCB layout without the need of external resistors, thus reducing overall component count. Designers can achieve higher output voltage with the use of external resistor divider. The device supports single input supply voltage as low to 1.1V that makes it easy to use. The low noise, high PSRR and high output current capability makes the RTQ2533W ideal to power noise-sensitive devices such as analog-to-digital converters (ADCs), digital-to-analog converters (DACs), and RF components. With very high accuracy, remote sensing, and soft-start capabilities to reduce inrush current, the RTQ2533W is ideal for powering digital loads such as FPGAs, DSPs, and ASICs. The external enable control and power good indicator function makes the control sequence easier. The output noise immunity is enhanced by adding external bypass capacitor on the NR/SS pin. The device is fully specified over the temperature range of TJ = −40°C to 125°C and is offered in a VQFN-20L 3.5x3.5 package.
Features
Input Voltage Range : 1.1V to 6.5V
Two Output Voltage Modes
0.8 V to 5.5V (Set by a Resistive Divider)
0.8 V to 3.95V (Set via PCB Layout, No External Resistor Required)
Accurate Output Voltage Accuracy (1%) Over Line, Load and Temperature
Ultra High PSRR : 40dB at 500kHz Excellent Noise Immunity
6.8μVRMS at 0.8V Output
10μVRMS at 3.3V Output
Ultra Low Dropout Voltage : 180mV at 3A
Enable Control
Programmable Soft-Start Output
Stable with a 47μF or Larger Ceramic Output Capacitor
Support Power-Good Indicator Function
RoHS Compliant and Halogen Free
Applications
Portable Electronic Devices
Wireless Infrastructures : SerDes, FPGA, DSP
RF, IF Components : VCO, ADC, DAC, LVDS
