Tiny Package, High Efficiency, Step-up DC/DC Converter


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The RT9266 is a compact, high efficiency, and low voltage step-up DC/DC converter with an Adaptive Current Mode PWM control loop, includes an error amplifier, ramp generator, comparator, switch pass element and driver in which providing a stable and high efficient operation over a wide range of load currents. It operates in stable waveforms without external compensation.
The low start-up input voltage below 1V makes RT9266 suitable for 1 to 4 battery cells applications of providing up to 300mA output current. The 450kHz high switching rate minimized the size of external components. Besides, the 17μA low quiescent current together with high efficiency maintains long battery lifetime.
The output voltage is set with two external resistors. Both internal 2A switch and driver for driving external power devices (NMOS or NPN) are provided.


  • PDA
  • DSC
  • LCD Panel
  • RF-Tags
  • MP3
  • Portable Instrument
  • Wireless Equipment
  • Power Bank
Key Spec.
Status Active
Vin (min) (V) 2
Vin (max) (V) 6
Vout (min) (V) 2.6
Vout (max) (V) 6
Output Adj. Method Resistor
Iq (typ) (mA) 0.55
SW Current Limit (typ) (A) 2
Freq (typ) (kHz) 500
Freq (min) (kHz) 425
Freq (max) (kHz) 575
Ron (typ) (Ohm) 0.3
Features Enable Input;OCP;UVP
Package Type SOT-26;SOT-89-5
  • 1.0V Low Start-up Input Voltage
  • High Supply Capability to Deliver 3.3V 100mA with 1 Alkaline Cell
  • 17μA Quiescent (Switch-off) Supply Current
  • Zero Shutdown Mode Supply Current
  • 90% Efficiency
  • 450kHz Fixed Switching Frequency
  • Providing Flexibility for Using Internal and External Power Switches
  • Small SOT-23-6 & SOT-89-5 Package
  • RoHS Compliant and 100% Lead (Pb)-Free
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Tiny Package, High Efficiency, Step-up DC/DC Converter2003/12/31
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Tiny Package, High Efficiency, Step-up DC/DC Converter 2015/05/19
Technical Documents
TitleLast UpdateShareDownload
Power IC Solutions for IoT/Portable/Wearable/Battery-Powered Applications2020/12/30
Richtek Selection Guide [Oct., 2020]2020/12/30