Rail-to-Rail Operational Amplifier


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The RT9133A/B consist low cost, high slew rates, single-supply rail-to-rail input and output operation amplifiers. The RT9133A contains a single amplifier and RT9133B contains two amplifiers. The RT9133A/B have high slew rates (12V/μs), 35mA continuous output current, 120mA peak output current and offset voltage below 10mV. The RT9133A/B are ideal for Thin Film Transistor Liquid Crystal Displays (TFT-LCD).
The RT9133A is available in SOT-23-5 and WDFN-6L 2x2 packages. The RT9133B is available in MSOP-8 package. The RT9133A/B are specified for operation over the full   -40°C to +85°C temperature range.


  • TFT-LCD Gamma / VCOM Buffer
  • Portable Electronic Product
  • Communications Product
Key Spec.
RT9133A RT9133B
Status Active Active
Vs (min) (V) 4.5 4.5
Vs (max) (V) 15 15
Number of Outputs 1 2
Voffset (typ) (mV) 2 2
Iout (typ) (mA) 35 35
Ipeak (typ) (mA) 120 120
Slew Rate (V/us) 12 12
AVOL (typ) (dB) 95 95
CMRR (typ) (dB) 80 80
PSRR (typ) (dB) 70 70
Package Type SOT-25;WDFN2x2-6 MSOP-8
  • Rail-to-Rail Output Swing
  • Supply Voltage : 4.5V to 15V
  • Continuous Output Current : 35mA
  • Peak Output Current : 120mA
  • High Slew Rate : 12V/μs
  • Offset Voltage : 10mV
  • RoHS Compliant and 100% Lead (Pb)-Free
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Rail-to-Rail Operational Amplifier2005/06/15
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Rail-to-Rail Operational Amplifier 2015/05/19
Technical Documents
TitleLast UpdateShareDownload
Richtek Selection Guide [Oct., 2020]2020/12/30