600mA Step-down Converter with Output Load Discharge

  • Vin Range: 2.7V to 5.5V
  • Maximum Output Current 600mA
  • High Efficiency Up to 9%
  • Low Quiescent Current
  • High Switching Frequency: 1.6MHz
  • Low Dropout in 100% Duty Cycle
  • Shutdown Current < 1µA
  • No Schottky Diode Required
  • Output Auto Discharge when Disabled (Option)
  • Integrated Soft-Start : 170µs
  • Adjustable Output Voltage Down to 0.6V
  • Short Circuit Protection
  • Over-Temperature Protection
  • Pb-Free Packages:
    • KTB851 : UTDFN-6, 1.6×1.6×0.55mm
    • KTB851 : TDFN-6, 1.6×1.6×0.75mm
    • KTB851A/B : TSOT23-5
  • RoHS and Green Compliant
  • -40°C to +85°C Temperature Range

Applications

  • LED backlighting
  • Handheld Devices
  • Digital Photo Frames
  • Automotive Navigation

Key Electrical Specifications

Vin(Min) Vin(Max) Control Switching Frequency Accuracy Output

Auto-Discharge

Max Current Package
2.7V 5.5V EN 1.6MHz ±3% Yes 0.25A

(@12Vout)

UTDFN-6 1.6 x1.6 x 0.55mm,

TDFN-6 1.6 x1.6 x 0.75mm, 

TSOT23-5

Typical Application Diagram

KTB851