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RT8202A

Richtek
Part Number RT8202A
Manufacturer Richtek
Description Single Synchronous Buck Controller
Published Apr 22, 2014
Detailed Description RT8202/A/B Single Synchronous Buck Controller General Description The RT8202/A/B PWM controller provides high efficiency...
Datasheet PDF File RT8202A PDF File

RT8202A
RT8202A

Overview
RT8202/A/B Single Synchronous Buck Controller General Description The RT8202/A/B 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 RT8202/A/B 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 RT8202/A/B is intended for CPU core, chipset, DRAM, or other low voltage supplies as low as 0.
75V.
RT8202 is available in WQFN-16L 4x4, RT8202A is available in WQFN-16L 3x3 and RT8202B is available in WQFN-14L 3.
5x3.
5 packages.
Features z z Ultra-High Efficiency Resistor Programmable Current Limit by Low Side RDS(ON) Sense (Lossless Limit) or Sense Resistor (High Accuracy) Quick Load Step Response within 100ns 1% VOUT Accuracy over Line and Load Adjustable 0.
75V to 3.
3V Output Range 4.
5V to 26V Battery Input Range Resistor Programmable Frequency Over/Under Voltage Protection 2 Steps Current Limit During Soft-Start Drives Large Synchronous-Rectifier FETs Power Good Indicator RoHS Compliant and 100% Lead (Pb)-Free z z z z z z z z z z Applications z z z Notebook Computers CPU Core Supply Chipset/RAM Supply as Low as 0.
75V Pin Configurations (TOP VIEW) TON EN/DEM NC BOOT 12 Ordering Information RT8202/A/B Package Type QW : WQFN-16L 4x4 (W-Type) (RT8202) QW : WQFN-16L 3x3 (W-Type) (RT8202A) QW : WQFN-14L 3.
5x3.
5 (W-Type) (RT8202B) Lead Plating System P : Pb Free G : Green (Halogen Free and Pb...


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