The RTQ2104BP is a 3A, high-efficiency, current mode synchronous step-down converter which is optimized for automotive applications. The device operates with input voltage from 3V to 36V and is protected from load dump transients up to 42V which eases input surge protection design. The device can program the output voltage between 0.8V and VIN. The peak current mode control with simple internal compensation allows the use of small inductors and results in fast transient response and good loop stability.
The ultra-low minimum on-time enables constant-frequency operation even at very high step-down ratios. The built-in spread-spectrum frequency modulation further helps system designers with better EMC management.
The RTQ2104BP provides complete protection functions such as input under-voltage lockout, output under-voltage protection, over-current protection, and thermal shutdown. Cycle-by-cycle current limit provides protection against shorted outputs, and soft-start eliminates input current surge during start-up. The RTQ2104BP is available in a SOP-8 (Exposed Pad) package.


  • Automotive Systems
  • Car Camera Module and Car Cockpit Systems
  • Connected Car Systems
  • Point of Load Regulator in Distributed Power Systems
  • Digital Set-Top Boxes
  • Broadband Communications
Key Spec.
Status Active
Vin (min) (V) 3
Vin (max) (V) 36
Number of Outputs 1
Vout (min) (V) 0.8
Vout (max) (V) 36
Output Adj. Method Resistor
Iout (max) (A) 3
Current Limit (typ) (A) 5
Freq (typ) (kHz) 2100
Ext Sync No
Ron_HS (typ) (mOhm) 80
Ron_LS (typ) (mOhm) 80
Iq (typ) (mA) 1.2
Features 100% Duty Cycle;AEC-Q100;Current Mode Control;Cycle-by-Cycle Current Limit;Enable Input;Force PWM;Internal Compensation;OCP;OTP;Power Good;UVP
Package Type PSOP-8
  • AEC-Q100 Grade 1 Qualified
  • Wide Input Voltage Range
    ► 4V to 36V
    ► 3V to 36V (Soft-start is finished)
  • Wide Output Voltage Range : 0.8V to VIN
  • Maximum Output Current : 3A
  • Peak Current Mode Control
  • Integrated 80mΩ Switch and 80mΩ Synchronous Rectifier
  • Fast 60ns Minimum Switch On-Time
  • Ultra-Short 65ns Minimum Switch Off-Time
  • Fixed Switching Frequency : 2.1MHz
  • Built-In Spread-Spectrum Frequency Modulation for Low EMI
  • Power Good Indication
  • Enable Control
  • 0.8V ±1.5% Reference Accuracy
  • Adjacent Pin-Short Protection
  • Built-In UVLO, OCP, UVP, OTP