High Efficiency Single Inductor Buck-Boost Converter

RTQ1741A Feature Product

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The RTQ1741A is a high efficiency single inductor Buck-Boost Converter which can operate with wide input voltage such as battery which is higher or lower than the output voltage and it can supply the load current up to 4A. The maximum peak current in the switches is limited to a typical value of 4.5A.

The RTQ1741A feedback loop is internally compensated for both Buck and Boost operation and it provides seamless transition between Buck and Boost modes and optimal transient response. The RTQ1741A operates at 2.4MHz typical switching frequency in full synchronous operation.

The RTQ1741A operates in Pulse Skipped Modulation (PSM) mode for increasing efficiency during low power RF transmission modes. The Power Save Mode can be disabled, forcing the RTQ1741A to operate at a fixed switching frequency operation at 2.4MHz. The RTQ1741A can also be synchronized with external frequency from 2.2MHz to 2.6MHz. The output voltage is programmable using an external resistor divider.


  • Cellular Phones
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  • PDAs
Key Spec.
Status Active
Vin (min) (V) 1.8
Vin (max) (V) 5.5
Vout (min) (V) 1.8
Vout (max) (V) 5.5
Iout (max) (A) 3
Current Limit (typ) (A) 4.5
Freq (typ) (kHz) 2400
Freq (min) (kHz) 2000
Freq (max) (kHz) 2800
Ron_HS (typ) (mOhm) 50
Ron_LS (typ) (mOhm) 50
Iq (typ) (mA) 0.02
Features Enable Input;OCP;OVP;Power Good;SCP;UVP
Package Type WDFN4x3-14A
  • Operates from a Single Li-ion Cell : 1.8V to 5.5V
  • Adjustable Output Voltage : 1.8V to 5.5V
  • 3A Maximum Load Capability for VIN > 3.6V,
    VOUT = 3.3V
  • Power Save Mode (PSM) for Improving Low Output Power Efficiency
  • Fixed Frequency Operation at 2.4MHz and Synchronization Possible from 2.2MHz to 2.6MHz
  • Up to 96% Efficiency
  • Input Current Limit
  • Internal Compensation
  • RoHS Compliant and Halogen Free
TitleLast UpdateShareDownload
High Efficiency Single Inductor Buck-Boost Converter2019/08/05
Technical Documents
TitleLast UpdateShareDownload
Richtek Selection Guide [Oct., 2020]2020/12/30
Part NumberPackage TypePackage Qty.Free SampleBuy From Authorized Distributor
RTQ1741AGQWWDFN4x3-14A1500 Request Buy from Distributor