The RT6158H converter is a high efficiency single inductor converter which can operate with wide input voltage 2.5V to 5.5V such as battery which is higher or lower than the output voltage and it can supply the load current up to 3A. The maximum peak current in the switches is limited to a typical value of 6.5A. 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 Buck-Boost operates at 2MHz typical switching frequency in full synchronous operation.

The RT6158H operates in Pulse Frequency Modulation (PFM) mode for increasing efficiency. The PFM mode can be disabled, forcing the RT6158H to operate at a fixed switching frequency operation at 2MHz. The RT6158H can also be synchronized with external frequency at MODE pin from 2.2MHz to 2.6MHz. The RT6158H output voltage is programmable using an external resistor divider; the output voltage range is from 2.1V to 5.2V.


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Key Spec.
Status Active
Vin (min) (V) 2.5
Vin (max) (V) 5.5
Vout (min) (V) 2.1
Vout (max) (V) 5.2
Iout (max) (A) 3
Current Limit (typ) (A) 6.5
Freq (typ) (kHz) 2000
Ron_HS (typ) (mOhm) 20
Ron_LS (typ) (mOhm) 20
Iq (typ) (mA) 0.008
Features Enable Input;External Synchronization;Internal Compensation;OCP;OVP
Package Type WL-CSP2.07x2.33-25(BSC)
  • Input Voltage Range : 2.5V to 5.5V
  • Adjustable Output Voltage : 2.1V to 5.2V by External Divided Resistors
  • Up to 3A Maximum Load Capability for VIN = 3V, VOUT = 3.5V
  • Up to 96% Efficiency (VIN = 4.2V, VOUT = 3.5V, ILOAD = 0.5A)
  • OCP, OVP, OTP, UVLO and SCP Function
  • 2MHz Switching Frequency
  • 5μA Non-Switching Low Quiescent Current
  • Forced PWM and Automatic PFM/PWM Mode Selection
  • Output Fast Discharge Function
  • Automatic / Seamless Step Up and Step Down Mode Transitions
  • 25-Ball WL-CSP Package
TitleLast UpdateDownload
High Efficiency, Low Quiescent, 3A Buck-Boost Converter2017/04/11
Part NumberPackage TypePackage Qty.Free SampleBuy From Authorized Distributor
RT6158HWSCWL-CSP2.07x2.33-25(BSC)3000 Request Buy from Distributor