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The RT7271A is a high efficiency, synchronous step-down DC/DC converter for applications operating from 4.5V to 17V and requiring up to 6A maximum load. The current mode architecture of RT7271A allows the transient response to be optimized. Cycle-by-cycle current limit provides protection against shorted output and soft-start eliminates input current surge during start-up. Fault conditions also include output under voltage protection, output over voltage protection, and thermal shutdown. The low current shutdown mode provides output disconnect, enabling easy power management in battery powered systems.

Applications

  • Industrial and Commercial Low Power Systems
  • Computer Peripherals
  • LCD Monitors and TVs
  • Point of Load Regulation for High Performance DSPs, FPGAs and ASICs
  • Green Electronics/Appliances
Key Spec.
RT7271A
Status Active
Vin (min) (V) 4.5
Vin (max) (V) 17
Number of Outputs 1
Vout (min) (V) 0.6
Vout (max) (V) 5
Output Adj. Method Resistor
Iout (max) (A) 6
Current Limit (typ) (A) 12
Freq (typ) (kHz) 500
Ext Sync No
Ron_HS (typ) (mOhm) 45
Ron_LS (typ) (mOhm) 25
Iq (typ) (mA) 0.9
Features Cycle-by-Cycle Current Limit;Enable Input;OCP;OVP;PSM;Power Good;Stable with Ceramic Capacitor;UVP
Package Type WL-CSP1.65x1.95-12
Features
  • 4.5V to 17V Input Voltage Range
  • 6A Output Current
  • Current Mode Control
  • 0.6V ± 1% Voltage Reference Over Temperature
  • Latch Off when Short Circuit
  • Monotonic Start-Up in Pre-biased Output
  • 500kHz Switching Frequency
  • Low On-Resistance
    45mΩ of High Side MOSFET
    25mΩ of Low Side MOSFET
  • Cycle-by-Cycle Current Limit
  • Power Good Monitor for UVP & OVP
  • Input Under Voltage Lockout
  • Thermal Shutdown
  • RoHS Compliant and Halogen Free
Datasheet
TitleLast UpdateDownload
6A, 17V, 500kHz CSP Synchronous Step-Down Converter2013/05/23
Reference Design
TitleLast UpdateDownload
Richtek Load Transient Tool2022/07/25
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