70V, Low Dropout Voltage Linear Regulator


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The RT9070B is a high voltage (70V operation), low quiescent current, low dropout linear regulator. The device supplies 20mA output current with a maximum dropout voltage of 230mV. Its low quiescent and shutdown currents (23μA operating and 3μA shutdown) are ideal for use in battery-powered and/or high voltage systems. Ground current is well-controlled in all conditions, including dropout.

The RT9070B operates with any reasonable output capacitors including 1μF low-ESR ceramic types. It features excellent line and load transient responses. Internal protection circuitry includes reverse-battery protection, current limiting, thermal shutdown, and reverse current protection.

The RT9070B has an adjustable output voltage (1.25V to 60V). It is available in the SOT-23-5 package.


  • Low Current, High Voltage Regulators
  • Battery Powered Applications
  • Telecom and Datacom Applications
  • Automotive Applications
Key Spec.
Status Active
Vin (min) (V) 4.5
Vin (max) (V) 70
Vout (min) (V) 1.25
Vout (max) (V) 60
Output Adj. Method Resistor
Accuracy (+/- %) 2
Iout (max) (mA) 20
Iq (typ) (uA) 23
Vdropout @ rated current (typ) (mV) 180 @ 0.02A
Cout Type Ceramic;Tantalum
Features Low Dropout;Stable with Ceramic Capacitor
Package Type SOT-25
  • Wide Input Voltage Range: 4.5V to 70V
  • Low Quiescent Current: 23μA Operating and 3μA Shutdown
  • Low Dropout Voltage: 180mV (typical) at 20mA
  • Adjustable (1.25V to 60V) Output Voltage
  • ±2% Initial Output Tolerance
  • Stable with 1μF Output Capacitor
  • Stable with Aluminum, Tantalum or Ceramic Capacitors
  • No Reverse-Current Protection Diode Needed
  • −70V Reverse-Battery Protection
  • Internal Current Limit
  • Internal Thermal Shutdown Protection
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70V, Low Dropout Voltage Linear Regulator2016/03/15