500mA, Low Voltage, LDO Regulator with External Bias Supply


Update Alert Share

The RT9041A/B are low voltage, low dropout linear regulators with an external bias supply input. The bias supply drives the gate of the internal N-Channel pass transistor, making these devices ideal for applications that require low voltage outputs from low voltage inputs. RT9041A and RT9041B provide the fixed version from 1V to 2V with 0.1V increment. Besides, RT9041B provides more feature by using external resistors as adjustable output voltage. The RT9041A/B include a current limit and thermal shutdown that protects the regulator in the event of a fault condition.

The RT9041A/B is available in a SOT-23-6 package.


  • Notebook Computers
  • VID Power Supplies
  • PDAs
  • Cell Phones
  • Low Dropout Regulators with External Bias Supply
Key Spec.
RT9041A RT9041B
Status Active Active
Vin (min) (V) 1 1
Vin (max) (V) 5.5 5.5
Vout (min) (V) 1 0.8
Vout (max) (V) 2 2.5
Output Adj. Method Fixed Fixed;Resistor
Accuracy (+/- %) 2 2
Iout (max) (mA) 500 500
Iq (typ) (uA) 160 160
Vdropout @ rated current (typ) (mV) 300 @ 0.5A 300 @ 0.5A
Cout Type Ceramic Ceramic
Features Enable Input;OCP;Power Good;Stable with Ceramic Capacitor Enable Input;OCP;Stable with Ceramic Capacitor
Package Type SOT-26 SOT-26
  • ±2% Output Voltage Accuracy
  • No Minimum Load Current Required
  • 1V to 5.5V Input Supply Voltage
  • 3V to 5.5V Input Bias Supply Voltage
  • PGOOD Open-Drain Output (RT9041A)
  • Support both Fixed/Adjustable Mode (RT9041B)
  • Low Supply Current
  • 5μA (max) Shutdown Supply Current
  • RoHS Compliant and Halogen Free
TitleLast UpdateShareDownload
500mA, Low Voltage, LDO Regulator with External Bias Supply2010/03/19
Title Last Update ShareDownload
500mA, Low Voltage, LDO Regulator with External Bias Supply 2015/05/19