The RTQ2527A/B is a very low dropout linear regulator which operates from input voltage as low as 0.8V. The device is capable of supplying 2A of output current with a typical dropout voltage of only 100mV. A VBIAS supply is required to run the internal reference and LDO circuitry while output current comes directly from the VIN supply for high efficiency regulation. User-programmable soft-start limits the input inrush current and minimizes stress on the input power. The enable input and power good output allow easy sequencing with external regulators. This complete flexibility provides an easy-to-use robust power management solution for a wide variety of applications.

The RTQ2527A/B is stable with output capacitor greater than or equal to 2.2μF. A precise reference and error amplifier deliver 1% accuracy over load, line and temperature. Over-current limit and over-temperature protection are also included. The RTQ2527A/B is available in the WDFN-10L 3x3 and WQFN-20L 5x5 packages.


  • PCs, Servers, Modems, and Set-Top-Boxes
  • FPGA Applications
  • DSP Core and I/O Voltages
  • Instrumentation
  • Post-Regulation Applications
  • Applications With Sequencing Requirements
RTQ2527A RTQ2527B
Status Active Active
Vin (min) (V) 0.8 0.8
Vin (max) (V) 5.5 5.5
Vout (min) (V) 0.8 0.8
Vout (max) (V) 3.6 3.6
Output Adj. Method Resistor Resistor
Accuracy (+/- %) 1 1
Iout (max) (mA) 2000 2000
Vdropout @ rated current (typ) (mV) 100 @ 2A 100 @ 2A
Bias Rail Yes Yes
Cout Type Ceramic Ceramic
Charge Pump No No
Features Enable Input;Low Dropout;OCP;Power Good Enable Input;Low Dropout;OCP;Power Good
Package Type WDFN3x3-10 WQFN5x5-20
  • Ultralow VIN Range : 0.8V to 5.5V
  • VBIAS Voltage Range : 2.7V to 5.5V
  • VOUT Voltage Range : 0.8V to 3.6V
  • Low Dropout : 100mV Typ. at 2A, VBIAS = 5V
  • 1% Accuracy Over Line/Load/ Temperature
  • PGOOD Indicator for Easy Sequence Control
  • Programmable Soft-Start Provides Linear Voltage Startup
  • Stable with Any Output Capacitor ≥ 2.2μF
  • Over-Current and Over-Temperature Protection
TitleLast UpdateDownload
2A Ultra-Low Dropout Voltage LDO Regulators with Soft-Start2024/03/27