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The RTQ2539C 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 for RTQ2539CGQV and max. 130mV for RTQ2539CGQWF). The device supports single input supply voltage as low to 1.1V, which makes it easy to use.
The low-noise, high PSRR and high output current capability makes the RTQ2539C 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 RTQ2539C is ideal for powering digital loads such as FPGAs, DSPs, and ASICs.
The external enable control and power good indicator function make 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 the WQFN-12L 2.2x2.5(FC) and VQFN-20L 3.5x3.5 packages.

 

Applications

  • Portable Electronic Devices
  • Wireless Infrastructures: SerDes, FPGA, DSP
  • RD, IF, Components: VCO, ADC, DAC, LVDS
Key Spec.
RTQ2539C
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) 3
Vdropout @ rated current (typ) (mV) 110 @ 3A
Bias Rail No
Cout Type Ceramic
Charge Pump Yes
Features Extra Low Noise;Low Dropout;OCP;Power Good
Package Type VQFN3.5x3.5-20;WQFN2.2x2.5-12(FC)
Features
  • 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 (For RTQ2539CGQV only, Set via PCB Layout, No External Resistor Required)
  • Accurate Output Voltage Accuracy (1%) Over Line, Load and Temperature
  • PSRR: 40dB at 500kHz
  • Noise Immunity
    - 6.8μVRMS at 0.8V Output
    - 10μVRMS at 3.3V Output
  • Dropout Voltage:
    - 180mV Max. at 3A for VQFN-20L 3.5x3.5
    - 130mV Max. at 3A for WQFN-12L 2.2x2.5
  • Enable Control
  • Programmable Soft-Start Output
  • Stable with a 47μF or Larger Ceramic Output Capacitor
  • Support Power-Good Indicator Function
Technical Documents
TitleItem TypeLast UpdateDownload
RICHTEK Low-Noise LDOs for Industrial Applications App. Note2024/11/18
Evaluation Board
Part NumberDistributorStockBuy From Authorized Distributor
EVB_RTQ2539CGQWF Digikey 0 Lead-Time: 14 weeks
Mouser 0 Lead-Time: 14 weeks
Please confirm with our distributor or sales representative for actual stock status.
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