SY21197ADC - High Efficiency, Fast Response, 6.0A, 18V Input Synchronous Step Down Regulator

Features

  • Low RDS(ON) for Internal Switches (Top/Bottom): 29mΩ/19mΩ
  • 4.5-18V Input Voltage Range
  • 6A Output Current Capability
  • 400kHz Switching Frequency Minimize the External Components
  • Stable with 22µF COUT and 1µH Inductor
  • Instant PWM Architecture to Achieve Fast Transient Responses
  • Internal Soft-start Limits the Inrush Current
  • Cycle-by-cycle Peak/Valley Current Limitation
  • Hic-cup Mode Output Short Circuit Protection
  • Thermal Shutdown with Auto Recovery
  • Output Auto Discharge Function
  • Compact Package: TSOT23-6

Typical Application

Description

SY21197 is a high efficiency 400kHz synchronous step-down DC/DC regulator, which is capable of delivering up to 6A load current. It can operate over a wide input voltage range from 4.5V to 18V and integrate main switch and synchronous switch with very low RDS(ON) to minimize the conduction loss.


SY21197 adopts the instant PWM architecture to achieve fast transient responses for high step down applications and high efficiency at light loads. In addition, it operates at pseudo-constant frequency of 400kHz to minimize the size of inductor and capacitor.

Applications

  • Set Top Box
  • Portable TV
  • DSL Modem
  • LCD TV
  • IP CAM
  • Networking