500mA, Low Dropout, Low Noise Ultra-Fast With Soft Start CMOS LDO Regulator


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The RT9020 is a high-performance, 500mA LDO regulator, offering extremely high PSRR and ultra-low dropout, ideal for portable RF and wireless applications with demanding performance and space requirements.

The RT9020 quiescent current is as low as 25μA, further prolonging the battery life. The RT9020 also works with low-ESR ceramic capacitors, reducing the amount of board space necessary for power applications, critical in hand-held wireless devices.

The RT9020 consumes typical 0.7μA in shutdown mode and has fast turn-on time less than 70μs (without CSS). The other features include ultra-low dropout voltage, high output accuracy, current limiting protection, and high ripple rejection ratio. Tiny packages SOT-23-5 and SC-70-5 are available.


  • Digital Still Camera
  • CDMA/GSM Cellular Handsets
  • Portable Information Appliances
  • Laptop, Palmtops, Notebook Computers
  • Mini PCI & PCI-Express Cards
  • PCMCIA & New Cards
Key Spec.
Status Active
Vin (min) (V) 2.2
Vin (max) (V) 5.5
Vout (min) (V) 1.2
Vout (max) (V) 3.3
Output Adj. Method Fixed
Accuracy (+/- %) 2
Iout (max) (mA) 500
Iq (typ) (uA) 25
Vdropout @ rated current (typ) (mV) 250 @ 0.5A
Cout Type Ceramic
Features Adjustable Soft-Start;Enable Input;OCP;Stable with Ceramic Capacitor
Package Type SC-70-5;SOT-25
  • Wide Operating Voltage Ranges : 2.2V to 5.5V
  • Low Dropout : 250mV at 500mA
  • 5mA Discharge Current of VOUT when IC Shutdown
  • Ultra-Low-Noise for DSC Application
  • Ultra-Fast Response in Line/Load Transient
  • Current Limiting Protection
  • Thermal Shutdown Protection
  • High Power Supply Rejection Ratio
  • Output Only 1μF Capacitor Required for Stability
  • TTL-Logic-Controlled Shutdown Input
  • RoHS Compliant and 100% Lead (Pb)-Free
  • Moisture Sensitivity Level : Level 3
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500mA, Low Dropout, Low Noise Ultra-Fast With Soft Start CMOS LDO Regulator2006/09/06
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500mA, Low Dropout, Low Noise Ultra-Fast With Soft Start CMOS LDO Regulator 2015/05/19
Technical Documents
TitleLast UpdateShareDownload
Power Mangement Components for Lithium-Ion Battery Powered Applications2018/11/15
Additional Documents
Title Last Update ShareDownload
Power Management Introduction and Selection Guide 2019/03/04
Power Management Components for Lithium-Ion Battery Powered Applications