Ultra Low Dropout 1.5A Linear Regulator


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The RT9183A series are high performance linear voltage regulators that provide ultra low dropout voltage, high output current with low ground current. It operates from an input of 2.3V to 5.5V and provides output current up to 1.5A thus is suitable to drive digital circuits requiring low voltage at high currents.
The RT9183A has superior regulation over variations in line and load. Also it provides fast respond to step changes in load. Other features include over current and over temperature protection. The adjustable version has enable pin to reduce power consumption in shutdown mode.
The devices are available in fixed output voltages of 1.2V to 3.3V with 0.1V per step and as an adjustable device with a 0.8V reference voltage. The RT9183A regulators are available in 3-lead SOT-223 and TO-263 packages (fixed output only for the 3-lead option). Also available are 5-lead TO-263, TO-252 and fused SOP-8 packages with two external resistors to set the output voltage ranges from 0.8V to 4.5V.


Key Spec.
Status Active
Vin (min) (V) 2.3
Vin (max) (V) 5.5
Vout (min) (V) 0.8
Vout (max) (V) 4.5
Output Adj. Method Fixed;Resistor
Accuracy (+/- %) 1
Iout (max) (mA) 1500
Iq (typ) (uA) 380
Vdropout @ rated current (typ) (mV) 330 @ 1.5A
Cout Type Ceramic
Features Enable Input;Low Dropout;OCP;Stable with Ceramic Capacitor
Package Type SOP-8;TO-252
  • 330mV Dropout @ 1.5A
  • 380μA Low Ground Pin Current
  • Excellent Line and Load Regulation
  • 0.1μA Quiescent Current in Shutdown Mode
  • Guaranteed 1.5A Output Current
  • Fixed Output Voltages : 1.2V to 3.3V
  • Adjustable Output Voltage from 0.8V to 4.5V
  • Over Temperature/Over Current Protection
  • RoHS Compliant and 100% Lead (Pb)-Free
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Ultra Low Dropout 1.5A Linear Regulator2010/03/02
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Ultra Low Dropout 1.5A Linear Regulator 2015/05/19