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IC / 11 / RT8223N / WQFN-24

تولید کننده: Richtek
مدل کالا: RT8223N
موجودی:
تماس 8893- 6186
قیمت: 0تومان

11 - RT8223N - Richtek - WQFN-24

High Efficiency, Main Power Supply Controller for Notebook Computer

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General Description

 

The RT8223N is a dual step-down, switch-mode power supply controller generating logic-supply voltages in battery-powered systems. It includes two Pulse Width Modulation (PWM) controllers adjustable from 2V to 5.5V, and also features fixed 5V/3.3V linear regulators. Each linear regulator provides up to 100mA output current with automatic linear regulator bootstrapping to the PWM outputs. The RT8223N includes on-board power up sequencing, a power good output, internal soft-start, and soft-discharge output that prevents negative voltage during shutdown.The constant on-time PWM scheme can operate without sense resistors and provide 100ns load transient response while maintaining nearly constant switching frequency. To eliminate noise in audio applications, an ultrasonic mode is included, which maintains the switching frequency above 25kHz. Moreover, the diode-emulation mode maximizes efficiency for light load applications. The RT8223N is available in a WQFN-24L 4x4 package.

 

Features

Constant On-time Control with 100ns Load Step
Response
Wide Input Voltage Range : 6V to 25V
Dual Adjustable Outputs from 2V to 5.5V
Fixed 3.3V and 5V LDO Output : 100mA
2V Reference Voltage
Frequency Selectable via TONSEL Setting
4700ppm/°C RDS(ON) Current Sensing
Programmable Current Limit Combined with
Enable Control
Selectable PWM, DEM, or Ultrasonic Mode
Internal Soft-Start and Soft-Discharge
High Efficiency up to 97%
5mW Quiescent Power Dissipation
Thermal Shutdown
RoHS Compliant and Halogen Free

 

Applications

 

Notebook and Sub-Notebook Computers
3-Cell and 4-Cell Li+ Battery-Powered Devices

 

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