Richtek RT8206M

RT8206M 概要

General DescriptionThe RT8206L/M dual step-down, Switch-Mode Power Supply (SMPS) controller generates logic-supply voltages in battery-powered systems. The RT8206L/M includes two Pulse-Width Modulation (PWM) controllers fixed at 5V/ 3.3V or adjustable from 2V to 5.5V. An optional external charge pump can be monitored through SECFB (RT8206L). This device also features a linear regulator providing a fixed 5V output. The linear regulator provides up to 70mA output current with automatic linear regulator bootstrapping to the BYP input. The RT8206L/M includes on-board power-up sequencing, the power good outputs, internal soft-start, and internal soft-discharge output that prevents negative voltages on shutdown.A constant on-time PWM control scheme operates without sense resistors and provides 100ns response to load transients while maintaining a relatively constant switching frequency. The unique ultrasonic mode maintains the switching frequency above 25kHz, which eliminates noise in audio applications. Other features include Diode Emulation Mode (DEM), which maximizes efficiency in light-load applications, and fixed frequency PWM mode, which reduces RF interference in sensitive application.The RT8206L/M is available in a WQFN-32L 5x5 package.Features● Wide Input Voltage Range 6V to 25V● Dual Fixed 5V/3.3V Outputs or Adjustable from 2V   to 5.5V, 1.5% Accuracy● Secondary Feedback Input Maintains Charge Pump   Voltage (RT8206L)● Independent Enable and Power Good● 5V Fixed LDO Output : 70mA● 2V Reference Voltage ±1% : 50μA● Constant ON-Time Control with 100ns Load Step   Response● Frequency Selectable via TON Setting● RDS(ON) Current Sensing and Programmable Current   Limit● 4700ppm/°C RDS(ON) Current Sensing● Selectable PWM, DEM or Ultrasonic Mode● Internal Soft-Start with Current Limiting and Soft   Discharge● High Efficiency Up to 97%● 5mW Quiescent Power Dissipation● Thermal Shutdown● RoHS Compliant and Halogen FreeApplications● Notebook and Sub-Notebook Computers● 3-Cell and 4-Cell Li+ Battery-Powered Devices

特徴

• Wide Input Voltage Range 6V to 25V
• Dual Fixed 5V/3.3V Outputs or Adjustable from 2V
• to 5.5V, 1.5% Accuracy
• Secondary Feedback Input Maintains Charge Pump
• Voltage (RT8206L)
• Independent Enable and Power Good
• 5V Fixed LDO Output : 70mA
• 2V Reference Voltage ±1% : 50μA
• Constant ON-Time Control with 100ns Load Step
• Response
• Frequency Selectable via TON Setting
• RDS(ON) Current Sensing and Programmable Current
• Limit
• 4700ppm/°C RDS(ON) Current Sensing
• Selectable PWM, DEM or Ultrasonic Mode
• Internal Soft-Start with Current Limiting and Soft
• Discharge
• High Efficiency Up to 97%
• 5mW Quiescent Power Dissipation
• Thermal Shutdown
• RoHS Compliant and Halogen Free

応用

• The RT8206M is commonly used in electronic devices that require efficient power management, such as smartphones, tablets, laptops, and other portable devices. It can also be used in other applications where multiple power rails need to be managed, such as industrial equipment, automotive systems, and home appliances.

仕様