%PDF-1.4
%
1 0 obj
<>
endobj
2 0 obj
<>stream
Middle to High End GPU Core Power
Middle to High End GPU Core Power
High End Desktop PC Memory Core Power
Low Voltage
High Current DC/DC Converter
Voltage Regulator Modules
Dual-Phase PWM Controller
Dual-Phase PWM Controller
Two Embedded MOSFET Drivers and Embedded Switching Boot Diode
Green-NAVPTM (Green Native Adaptive Voltage Positioning) Topology
Dynamic Auto Phase Control with Programmable Threshold
Cross-talk Jitter Suspend (CJSTM)
Remote GND Detection for High Accuracy
Automatic Diode Emulation Mode/Or Ultrasonic Mode at Light Load
Lossless RDS(ON) Current Sensing for Current Balance
Lossless DCR Current Sensing for AVP & OCP
Reference Voltage Output with 1% Accuracy
External Reference Input with Soft-Start (RISS)
Embedded One-Bit VID Control
Programmable OCP Threshold
Programmable Switching Frequency
Reference Tracking UVP/OVP Protection
Shoot Through Protection and Short Pulse Free Technology
RoHS Compliant and Halogen Free
Multi-Phase PWM Controller for GPU Core Power Supply
The RT8809A/B is a dual-phase synchronous buck PWM controller with integrated ,drivers which are optimized for high performance graphic microprocessor and ,computer applications. The IC integrates a G-NAVPTM PWM controller, two 12V ,MOSFET drivers with internal bootstrap diodes, as well as output current ,monitoring and protection functions into the WQFN-24L 4x4 package. The ,RT8809A/B adopts DCR and RDS(ON) current sensing. Load line voltage positioning ,(droop) and over current protection are accomplished through continuous ,inductor DCR current sensing, while RDS(ON) current sensing is used for ,accurate channel current balance. Using both methods of current sampling ,utilizes the best advantages of each technique. The RT8809A/B also features a ,one-bit VID control operation in which the feedback voltage is regulated and ,tracks external input reference voltage. Other features include, adjustable ,operating frequency, external compensation, and enable/shutdown functions.
endstream
endobj
3 0 obj
<>
endobj
6 0 obj
<>/ColorSpace<>/Font<>/ProcSet[/PDF/Text/ImageC]/ExtGState<>>>
endobj
5 0 obj
<>stream
HWn7}(P_Kzcv$y0ƗIϩ"F^g<:]dUTx|zPRh<#zAgBHŭJ<~UpL׃bp;Cy72L.d3o6Fhy7%~ bO^c㠤9lnտ6)hax!
Ղ(4d1̶3Ʃj9++C֝Qht5\U=jMZ=>B<|QҮѯgÚ5)RBUy<f%ηy^x2>\ +rI8W
!Fz9ira]Ye50y9
9^η/ģO.Gq
r`1ѰWRjd?}ۏ.vF8pn^gAz
j>;dɉ Vbn}8C|:@ ]lCxw#dM8%ޏLi)4 pYEmiZlG1)Ȁ:VnwZf*sVDHJ(2V9%`5!0qŋv1#Z҈]1b%7qz-VZ]ŶH9+(8r^7oZ17:J"o\RSfIKFv)fA5|Br-݄LAX)ƍEFB##t5BPзȋBErp@ ;Y&Ac
5Sܝ?7Z/h!ͪDzO5YajNs|s}4%x֓Ư)Y\MJԖե/Y$ک1iLsOWRGZh91oE?g`,o}
}VZ-[[ϵ~ڟy%ʚ'SdTɡ;%G**
.t@IvIԿX2(m7W_1DR&0qԔʟ8pмp.=;gEAPp^#ǰtlk8IօO0贰2
^i=SYTI;u{hjS:u=7]9ƴ}zvmZx=Ξɀ60CIP7CH!OJ4mFZj7}؛;^Ot\kݳ^-