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RT8540A

Richtek
Part Number RT8540A
Manufacturer Richtek
Description High Power Synchronous Boost Converter
Published May 26, 2016
Detailed Description ® RT8540A High Power Synchronous Boost Converter General Description The RT8540A is a high-efficiency, high-current Bo...
Datasheet PDF File RT8540A PDF File

RT8540A
RT8540A

Overview
® RT8540A High Power Synchronous Boost Converter General Description The RT8540A is a high-efficiency, high-current Boost converter in all single-cell Lithium-ion / polymer battery operated products.
The RT8540A maintains output current regulation by switching the internal high side and low side switch transistors.
The transistor switches are pulse-width modulated at a fixed frequency of 2MHz.
The high switching frequency allows the use of a small inductor and output capacitor, making the RT8540A ideally suited for small battery-powered applications.
Output voltage can be set by an external resistor on the FB pin or by I2C interface.
The RT8540A contains over voltage protection, over current protection and over temperature protection to prevent the device from output open circuit or short circuit condition.
Built-in soft-start circuitry prevents excessive inrush current during start-up.
The shutdown feature reduces quiescent current to less than 5μA.
Marking Information 0R= : Product Code 0R=YM DNN YMDNN : Date Code Features z Input Voltage Range : 2.
8V to 5.
5V z True Load Disconnect z Internal Synchronous Rectifier z Up to 90% Efficiency with Small Magnetics z Current Mode PWM Operation with Internal Compensation z Internal Soft-Start Control z Flexible on/off Control by I2C or EN.
z Short Circuit Protection z Input Current Limit up to 4A z Over Voltage, Over Temperature Protection z Shutdown Current : 2μA z −40°C to 85°C Temperature Range z 20-Lead WQFN Package z RoHS Compliant and Halogen Free Applications z Cellular Phones z Digital Cameras z Probable Instruments Simplified Application Circuit VBAT L CIN1 SW VOUT VIN RT8540A SELECT SCL SDA PGND VOUT COUT I2C Interface Copyright ©2013 Richtek Technology Corporation.
All rights reserved.
DS8540A-00 June 2013 is a registered trademark of Richtek Technology Corporation.
www.
richtek.
com 1 RT8540A Ordering Information RT8540A Package Type QW : WQFN-20L 4x4 (W-Type) (Exposed Pad-Option 1) Lead Platin...


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