The RT9048 is a high performance positive voltage regulator designed for use in applications requiring ultra low input voltage and ultra-low dropout voltage at up to 2A. The feature of ultra-low dropout voltage is ideal for the application where output voltage is very close to input voltage. The input voltage can be as low as 1.4V and the output voltage is adjustable by an external resistive divider as low as 0.5V. The RT9048 provides an excellent output voltage regulation over variations in line, load and temperature. Over Current and over temperature protection functions are provided. Additionally, an enable pin is designed to further reduce power consumption while shutdown and the shutdown current is as low as 1.5μA.

The RT9048 is available in the SOP-8 (Exposed Pad) package.


  • Telecom/Networking Cards
  • Motherboards/Peripheral Cards
  • Industrial Applications
  • Wireless Infrastructure
  • Set Top Box
  • Medical Equipment
  • Notebook Computers
  • Battery Powered Systems
Key Spec.
Status Active
Vin (min) (V) 1.4
Vin (max) (V) 6
Vout (min) (V) 0.5
Vout (max) (V) 5
Output Adj. Method Resistor
Accuracy (+/- %) 2
Iout (max) (mA) 2000
Iq (typ) (uA) 700
Vdropout @ rated current (typ) (mV) 240 @ 2A
Bias Rail No
Cout Type Ceramic
Charge Pump Yes
Features Enable Input;Industrial;Low Dropout;OCP;Stable with Ceramic Capacitor
Package Type PSOP-8
  • Input Voltage as Low as 1.4V
  • Ultra-Low Dropout Voltage 400mV @ 2A
  • Over Current Protection
  • Over Temperature Protection
  • 1.5μA Input Current in Shutdown Mode
  • Enable Control
  • RoHS Compliant and Halogen Free
TitleLast UpdateDownload
2A, Low Input Voltage, Ultra-Low Dropout Linear Regulator with Enable2013/04/02
Technical Documents
TitleLast UpdateDownload
Richtek Selection Guide [Oct., 2022]2022/10/01
Additional Documents
Title Last Update ShareDownload
Power Management Introduction and Selection Guide 2020/12/07
Part NumberPackage TypePackage Qty.Free SampleBuy From Authorized Distributor
RT9048GSPPSOP-82500 Request Buy from Distributor