RT9992数据手册Richtek中文资料规格书

描述 Description

This is a 5+2 CH integrated PMIC for DV application. There are 5 DC/DC converters : one synchronous step-up, one selectable synchronous step-up/step-down, two synchronous step-downs, and one WLED driver in either asynchronous step-up or current source mode, selectable by VOUT6 initial voltage. In addition, there are 2 LDO regulators : one RTC LDO and one generic LDO. The generic LDO can choose internal feedback loop for fixed output 2.5V or external feedback loop for customized output voltage. Both low voltage synchronous step-up converters are with load disconnect function. All power MOSFETs and compensation networks are integrated. There is a power good indicator to monitor FB2, FB3, and FB4 voltage status. CH1 to CH5 enabling can be controlled flexibly : enabled independently or in preset sequences.

特性 Features

•All Power MOSFETs Integrated
•5 Channels with Internal Compensation
•Flexible Enabling Control
► Enabled Independently or in Preset Power On/Off Sequences
•CH2 Synchronous Converter in Step-Up or Step-Down Mode Selectable by SEL Pin
•Synchronous Step-Down DC/DC Converter
► Up to 95% Efficiency
► 100% (max) Duty Cycle
•Synchronous Step-Up DC/DC Converter
► Adjustable Output Voltage
► Up to 95% Efficiency
•Asynchronous Step-Up Converter to Drive WLED, Selectable Between Step-Up or Current Source
► LED Open Protection (OVP6) in Step-Up Mode
► PWM Dimming Control
•Load Disconnect Function for CH1 and CH2 Synchronous Step-Up Converter
•Fixed 2MHz Switching Frequency for CH1, CH2, CH3, and CH4
•Fixed 1MHz Switching Frequency for CH6
•Generic LDO (CH5)
► Output Voltage : Fixed 2.5V or Set by External Feedback Network, Determined by FB5 Initial Voltage
•RTC LDO : Fixed Output Voltage 3.1V
•Power Good Indicator to Monitor Output Voltage Status of CH2, CH3, and CH4
•32-Lead Package
•RoHS Compliant and Halogen Free

应用 Application

• CMOS DV
• Gaming