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The RT9085 is a high-performance positive voltage regulator with a separated bias voltage (VBIAS), designed for applications requiring low input voltage and ultra-low dropout voltage, with output current up to 1A. The ultra-low dropout voltage feature is ideal for applications where the output voltage is very close to the input voltage. The input voltage can be as low as 0.8V, and the output voltage is adjustable via an external resistive divider. The RT9085 features very low quiescent current consumption for portable applications. The device is available in the WL- CSP-6B 0.8x1.2 (BSC) and ZWL-CSP-6B 0.8x1.2 (BSC) packages. The recommended junction temperature range is -40°C to 125°C.

Applications

  • Battery-Powered Systems
  • Portable Electronic Devices
  • Digital Set-Top Boxes
Key Spec.
RT9085A RT9085E
Status Active Active
Vin (min) (V) 0.8 0.8
Vin (max) (V) 5.5 5.5
Vout (min) (V) 0.5 0.5
Vout (max) (V) 3 3
Output Adj. Method Resistor Resistor
Accuracy (+/- %) 1;2 1;2
Iout (max) (mA) 1000 1000
Iq (typ) (uA) 35 35
Vdropout @ rated current (typ) (mV) 60 @ 1A 60 @ 1A
Bias Rail Yes Yes
Cout Type Ceramic Ceramic
Charge Pump No No
Features Enable Input;Low Dropout;OCP;Stable with Ceramic Capacitor Enable Input;Low Dropout;OCP;Stable with Ceramic Capacitor
Package Type WL-CSP0.8x1.2-6(BSC) ZWL-CSP0.8x1.2-6(BSC)
Features
  • Input Voltage Range: 0.8V to 5.5V
  • Bias Voltage Range: 3V to 5.5V
  • Available in Fixed and Adjustable (0.5V to 3V)
  • Ultra Low Dropout Voltage: 60mV at 1A
  • Accurate Output Voltage Accuracy Over Line/Load/Temperature
    - 1% @ -40°C to 85°C
    - 2% @ -40°C to 125°C
  • Low Bias Input Current
    - Typ. 35μA in Operating Mode
    - Typ. 0.5μA in Shutdown Mode
  • Output Active Discharge Function
  • Enable Control
  • Stable with a 10μF Output Ceramic Capacitor
Part NumberPackage TypePackage Qty.Free SampleDistributorStockBuy From Authorized Distributor
RT9085AWSCWL-CSP0.8x1.2-6(BSC)3,000 Request Digikey 2,773 Buy
Mouser Lead-Time: 14 weeks Not Available
WPG Lead-Time: 14 weeks Not Available
Please confirm with our distributor or sales representative for actual stock status.
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