RT5021 datasheet(2/67 Pages) RICHTEK

2 / 67 page

RT5021

DS5021-01 April 2013

www.richtek.com

is a registered trademark of Richtek Technology Corporation.

SEQ # 4 : CH1

CH4

CH3

CH2

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 and VIN Power GOOD Indicators

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 Package

RoHS Compliant and Halogen Free

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 3.05V 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

→

RT5021 数据表(PDF) 2 Page - Richtek Technology Corporation

RT5021 数据表(HTML) 2 Page - Richtek Technology Corporation

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