The RTQ2513T is a high-current (3A), low-noise (7μVRMS), high accuracy (1% over line, load, and temperature), low-dropout linear regulator (LDO), and is capable of sourcing 3A with extremely low dropout (max. 180mV). The device output voltage is pin-selectable (up to 3.65V) 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 as 1.1V that makes it easy to use.

The low noise, high PSRR, and high output current capability make the RTQ2513T ideal to power noise-sensitive devices such as analog-to-digital converters (ADCs), digital-to-analog converters (DACs), and RF components. To reduce inrush current with very high accuracy, remote sensing, and soft-start capabilities, the RTQ2513T is ideal for powering digital loads such as FPGAs, DSPs, and ASICs.

The external enable control and power good indicator function make 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 a WQFN-20L 3.5x3.5 package.


  • Portable Electronic Devices
  • Wireless Infrastructure : SerDes, FPGA, DSP
  • RF, IF Components : VCO, ADC, DAC, LVDS
Key Spec.
Status Active
Vin (min) (V) 1.1
Vin (max) (V) 6.5
Vout (min) (V) 0.5
Vout (max) (V) 5.5
Output Adj. Method Resistor
Accuracy (+/- %) 1
Iout (max) (mA) 3000
Iq (typ) (uA) 4200
Vdropout @ rated current (typ) (mV) 110 @ 3A
Bias Rail No
Cout Type Ceramic
Charge Pump Yes
Features Adjustable Soft-Start;Enable Input;Extra Low Noise;High PSRR;Low Dropout;OCP;Output Discharge;Power Good;Stable with Ceramic Capacitor
Package Type WQFN3.5x3.5-20
  • Input Voltage Range : 1.1V to 6.5V
  • Two Output Voltage Modes
    ► 0.5V to 5.5V (Set by a Resistive Divider)
    ► 0.5V to 3.65V (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
    ► 7μVRMS at 0.5V Output
    ► 10μVRMS at 3.3V Output
  • Ultra Low Dropout Voltage : 180mV at 3A
  • Enable Control
  • Programmable Soft-Start Output
  • Stable with 10μF or higher Output Ceramic Capacitor
  • Support Power-Good Indicator Function
  • RoHS Compliant and Halogen Free
TitleLast UpdateDownload
3A, 6.5V, Ultra Low Noise, Ultra Low Dropout Linear Regulator2019/06/27
Technical Documents
TitleItem TypeLast UpdateDownload
Richtek Product Selection Guide [Jan., 2024] Selection Guide2024/01/18
Richtek Featured Product Tree [Aug., 2023] Selection Guide2023/08/07
Part NumberPackage TypePackage Qty.Free SampleBuy From Authorized Distributor
RTQ2513TGQWWQFN3.5x3.5-201500 Request Buy from Distributor