IC / A0 / RT8209B / WQFN-14

تولید کننده: Richtek
مدل کالا: RT8209B
تماس 8893- 6186
قیمت: 0تومان

A0 - RT8209B - Richtek

Single Synchronous Buck Controller

General Description

The RT8209A/B/C PWM controller provides high efficiency,excellent transient response, and high DC output accuracy

needed for stepping down high voltage batteries to generate low voltage CPU core, I/O, and chipset RAM supplies in notebook computers. The constant-on-time PWM control scheme handles wide input/output voltage ratios with ease and provides 100ns

“instant-on” response to load transients while maintaining a relatively constant switching frequency The RT8209A/B/C achieves high efficiency at a reduced cost by eliminating the current-sense resistor found in

traditional current mode PWMs. Efficiency is further enhanced by its ability to drive very large synchronous rectifier MOSFETs. The buck conversion allows this device to directly step down high voltage batteries for the highest

possible efficiency. The RT8209A/B/C is intended for CPU core, chipset, DRAM, or other low voltage supplies as low as 0.75V. The RT8209A is in a WQFN-16L 3x3 package, the RT8209B is in a WQFN-14L 3.5x3.5 package

and the RT8209C is available in a TSSOP-14 package 



Ultra-High Efficiency

 Resistor Programmable Current Limit by Low Side

RDS(ON) Sense (Lossless Limit)

 Quick Load Step Response within 100ns

 1% VFB Accuracy over Line and Load

 4.5V to 26V Battery Input Range

 Resistor Programmable Frequency

 Integrated Bootstrap Switch

 Integrated Negative Current Limiter

 Over/Under Voltage Protection

 4 Steps Current Limit During Soft-Start

 Power Good Indicator

 RoHS Compliant and Halogen Free


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