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2A Ultra-Low Dropout Voltage LDO Regulators with Soft-Start

RTQ2522A/RTQ2522B

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The RTQ2522A/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 135mV. 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 RTQ2522A/B is stable with output capacitor greater than or equal to 2.2μF. A precise reference and error amplifier deliver 2% accuracy over load, line and temperature. Over-current limit and over-temperature protection are also included. The RTQ2522A/B is available in the WDFN-10L 3x3 and WQFN-20L 5x5 packages.

Applications

  • PCs, Servers, Modems, and Set-Top-Boxes
  • FPGA Applications
  • DSP Core and I/O Voltages
  • Instrumentation
  • Post-Regulation Applications
  • Applications With Sequencing Requirements
Key Spec.
RTQ2522A RTQ2522B
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 (+/- %) 2 2
Iout (max) (mA) 2000 2000
Iq (typ) (uA) 1000 1000
Vdropout @ rated current (typ) (mV) 135 @ 2A 135 @ 2A
Bias Rail Yes
Cout Type Ceramic Ceramic
Features Adjustable Soft-Start;Low Dropout;OCP;Power Good;Stable with Ceramic Capacitor Adjustable Soft-Start;Low Dropout;OCP;Power Good;Stable with Ceramic Capacitor
Package Type WDFN3x3-10 WQFN5x5-20
Features
  • 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 : 135mV Typ at 2A, VBIAS = 5V
  • 2% 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
Datasheet
TitleLast UpdateShareDownload
2A Ultra-Low Dropout Voltage LDO Regulators with Soft-Start2017/05/04
Part NumberPackage TypePackage Qty.Free SampleBuy From Authorized Distributor
RTQ2522AGQW(2)WDFN3x3-101500 Not available Buy from Distributor
RTQ2522BGQW(2)WQFN5x5-201500 Not available Buy from Distributor
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