RT 8249C 8249C 2N= QFN-20

Brand new RT8249C 2N= QFN-20

 The RT8249A/B/C is a dual-channel step-down, controller generating supply voltages for battery-powered systems. It includes two Pulse-Width Modulation (PWM) controllers adjustable from 2V to 5.5V, and two fixed 5V/3.3V linear regulators. Each linear regulator provides up to 100mA output current and 3.3V linear regulator provides 1% accuracy under 35mA. The RT8249A/B has an oscillator output to driver the external charge pump application. The RT8249C provides a mode selection pin, SKIPSEL, to select Diode-Emulation Mode (DEM) or Audio Skipping Mode (ASM). Other features include on-board power-up sequencing, a power-good output, internal soft-start, and soft-discharge output that prevents negative voltage during shutdown.


  • Support Connected Standby Mode for Ultrabook
  • CCRCOT Control with 100ns Load Step Response
  • PWM Maximum Duty Ratio > 98%
  • 5V to 25V Input Voltage Range
  • 2V to 5.5V Output Voltage Range
  • 5V/3.3V LDOs with 100mA Output Current
  • 1% Accuracy on 3.3V LDO Output
  • Oscillator Driving Output for Charge Pump Application
  • Internal Frequency Setting
  • RT8249A/B : 400kHz/475kHz (CH1/CH2)
  • RT8249C : 500kHz/600kHz (CH1/CH2)
  • Internal Soft-Start and Soft-Discharge
  • 4700ppm/°C RDS(ON) Current Sensing
  • Independent Switcher Enable Control
  • Built in OVP/UVP/OCP/OTP
  • Non-latch UVLO
  • Power Good Indicator
  • 20-Lead WQFN Package
  • RoHS Compliant and Halogen Free



Category: MAINREG, QFN-20

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