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The RT8274 is a high voltage buck converter that can support the input voltage range from 4.75V to 24V and the output current can be up to 3A. Current Mode operation provides fast transient response and eases loop stabilization.

The chip provides protection functions such as cycle-by-cycle current limiting and thermal shutdown protection. In shutdown mode, the regulator draws 25μA of supply current. The RT8274 is available in a SOP-8 (Exposed Pad) surface mount package.

應用

  • Distributive Power Systems
  • Battery Charger
  • DSL Modems
  • Pre-regulator for Linear Regulators
主要規格
RT8274
Status EOL
Vin (min) (V) 4.75
Vin (max) (V) 24
Number of Outputs 1
Vout (min) (V) 1.222
Vout (max) (V) 15
Output Adj. Method Resistor
Iout (max) (A) 3
Current Limit (typ) (A) 4.4
Freq (typ) (kHz) 400
Ext Sync No
Ron_HS (typ) (mOhm) 100
Iq (typ) (mA) 0.8
Features Adjustable Soft-Start;Current Mode Control;Enable Input;Force PWM;OCP;Stable with Ceramic Capacitor;UVP
Package Type PSOP-8
關鍵特性
  • Wide Operating Input Range : 4.75V to 24V
  • Adjustable Output Voltage Range : 1.222V to 15V
  • Output Current up to 3A
  • 25μA Low Shutdown Current
  • Power MOSFET : 0.1Ω
  • High Efficiency up to 95%
  • 400kHz Fixed Switching Frequency
  • Stable with Low ESR Output Ceramic Capacitors
  • Thermal Shutdown Protection
  • Cycle-By-Cycle Over Current Protection
  • RoHS Compliant and Halogen Free
Datasheet
TitleLast UpdateDownload
3A, 24V, 400kHz Step-Down Converter2015/07/13
Reference Design
TitleLast UpdateDownload
立錡負載暫態量測工具2018/11/01
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