General Description
The RTQ2521 is a high-current (1.2A), low-noise (6μVrms),
high accuracy (1% over line, load, and temperature), lowdropout
linear regulator (LDO) capable of sourcing 1.2A
with extremely low dropout (max. 75mV). 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 RTQ2521 ideal to power noise-sensitive devices
such as analog-to-digital converters (ADCs), digital-toanalog
converters (DACs), and RF components. With very
high accuracy, remote sensing, and soft-start capabilities
to reduce inrush current, the RTQ2521 is ideal for powering
digital loads such as FPGAs, DSPs, and ASICs.
The external enable control and power good indicator
function makes the sequence control easier. The output
noise immunity is enhanced by adding external bypass
capacitor on NR/SS pin. The device is fully specified over
the temperature range of TJ = −40°C to 125°C and is offered
in the WDFN-8EL 3x3 package.

Features
 Input Voltage Range : 1.1V to 6.5V
 Output Voltage Range : 0.8V to 5.5V
 Accurate Output Voltage Accuracy (1%) Over Line,
Load and Temperature
 Ultra High PSRR : 38dB at 500kHz
 Excellent Noise Immunity
 6μVRMS at 0.8V Output
 Ultra Low Dropout Voltage : 75mV at 1.2A
 Enable Control
 Programmable Soft-Start Output
 Stable with a 4.7μF or Larger Ceramic Output
Capacitor
 Support Power-Good Indicator Function
 RoHS Compliant and Halogen Free

Applications
 Portable Electronic Device
 Wireless Infrastructure : SerDes, FPGA, DSP
 RF, IF Components : VCO, ADC, DAC, LVDS