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.


  • DSC Power Supply System
  • CMOS-Sensor DV
  • Portable Instruments
Key Spec.
Status Active
Vin (min) (V) 1.8
Vin (max) (V) 5.5
Number of Channels 9
Number of Buck Converters 3
Number of Boost Converters 2
Number of Negative Outputs 0
Number of LED Drivers 1
Number of LDO Regulators 3
Application Portable device
Features 100% Duty Cycle;Current Mode Control;Enable Input;Internal Compensation;OCP;OVP;UVP
Package Type WQFN5x5-40
  • 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


TitleLast UpdateDownload
I2C Programmable Multi-Channel PMU with Battery Charger for CMOS DSC/DV2013/03/19
Technical Documents
TitleItem TypeLast UpdateDownload
Richtek Product Selection Guide [Jan., 2024] Selection Guide2024/01/18
Part NumberPackage TypePackage Qty.Free SampleBuy From Authorized Distributor
RT5024GQWWQFN5x5-401500 Request Buy from Distributor