RT5024数据手册集成电路（IC）的电源管理-专用规格书PDF

描述 Description

The RT5024 is a complete power supply solution for digital still cameras and other hand held devices. The RT5024 is composed of multi-channel DC-DC power converter unit, a single-cell linear Li+ ion battery charger, a charger type detector, and an I2C control interface.



The power converter unit includes one synchronous step-up converter (CH1), one synchronous step-up/down converter (CH2), three synchronous step-down converters (CH3/4/5), two LDOs with input power as low as 1.5V (CH6/8), one WLED driver in synchronous high-voltage step-up mode or low-voltage current regulator mode (CH7), and a keep-alive LDO (CH9) for RTC application. All converters are internally frequency compensated and integrate power MOSFETs. The power converter unit provides complete protection functions : over current, thermal shutdown, over voltage and under voltage protection. The RT5024 has a WAKEUP impulse generation circuitry to monitor VIN or BAT installation event. To fulfill most of applications, the RT5024 has six preset power on/off sequences.



The battery charger includes Auto Power Path Management (APPM). No external MOSFETs are required. The charger can enter sleep mode when power is removed.

特性 Features

•Power Converter Unit
•CH1 LV Sync Step-Up
► Support Up to 1A Loading, DVS (Dynamic Voltage Scaling), Load-Disconnect, Up to 95% Efficiency, PSM/PWM Selectable
•CH2 LV Sync Step-Up/Down
► Support Up to 1A Loading, DVS, Up to 95% Efficiency, PSM/PWM Selectable
•CH3/4 LV Sync Step-Down
► Support Up to 1.3A Loading, DVS, Up to 95% Efficiency, 100% (max) Duty Cycle, PSM/PWM Selectable
•CH5 LV Sync Step-Down
► Support Up to 0.6A Loading, Up to 95% Efficiency, 100% (max) Duty Cycle
► Output Voltage can be Selected from Preset List or Set by External Feedback Network.
•CH6 Low Input Power LDO
► VIN Range 1.5V to 5.5V
► Output Voltage Level Selectable in I2C Register
•CH7 WLED Driver in Either Sync Step-Up Operation or Current Regulator Operation
► Step-Up Mode with LED Open Protection (OVP7 16V or 25V, Selectable in I2C Register)
► Step-Up Mode Support Series 2 to 6 WLED and Load Disconnect Function
► Current Regulator Mode for 1 WLED
► 31 WLED Dimming Levels
► Automatic Mode Selection by External Circuit Topology
•CH8 Generic LDO
► VIN Range 1.5V to 5.5V
► Output Voltage Level Selectable in I2C Register
•CH9 Low Quiescent LDO with Reverse Leakage Prevention for RTC Power Supply
► Fixed 3.25V Output
•Six Preset Power On/Off Sequences by One Pin SEQ
► SEQ # 0 : CH2→ CH3 → CH4
► SEQ # 1 : CH1→ CH3 → CH2→ CH4
► SEQ # 2 : CH1→ CH3 → CH4 → CH2
► SEQ # 3 : CH1→ CH2 → CH4 → CH3
► SEQ # 4 : CH1→ CH4→ CH3→ CH2→ CH5
► SEQ # 5 : CH1→ CH4→ CH2→ CH3
•All Power Switches Integrated with Internal Compensation
•Discharge Output of Every Channels when Turning Off
•Wake Up Impulse to Monitor BAT and VIN Plug-In
•Fixed 2MHz Switching Frequency for CH1/3/4/5, Fixed 1MHz Switching Frequency for CH2/7
• Charger Unit
•28V Maximum Rating for VIN Power
•Selectable Power Input Current Limit (0.1A / 0.5A / 1A / 1.5A)
•Auto Power Path Management (APPM) with Integrated Power MOSFETs
•Battery Charging Current Control and Regulation Voltage Control
•Programmable Charging Current and Safe Charge Timer
•Optimized Charge Rate via Thermal Feedback
•Under Voltage Protection, Over Voltage Protection
•Charger Status Indicator
•Interrupt Indicator to JEITA Temperature/Fault/Status Events when PMU is Enabled
► Battery Temperature Events
► Battery Removing Event
► Charger in Thermal Regulation Control
► Safety Timer Timeout
► End of Charging
► VIN Power Good
► VIN < DPM Threshold 4.35V
► Charger Type Detection Finishing
• Charger Type Detection
► Dedicated Charger : Support Apple and Sony Charger
► Secondary Charger Detection to Distinguish CDP and DCP
• I2C Control Interface : Support Fast Mode up to 400kb/s
• Small 40-Lead WQFN 5x5 Package
• RoHS Compliant and Halogen Free  

应用 Application

• DSC Power Supply System
• CMOS-Sensor DV
• Portable Instruments