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RT8867A

Richtek Technology
Part Number RT8867A
Manufacturer Richtek Technology
Description Advanced 4/3-Phase PWM Controller
Published May 13, 2015
Detailed Description ® RT8867A Advanced 4/3-Phase PWM Controller for CPU Core Power General Description The RT8867A is an advanced 4/3-phas...
Datasheet PDF File RT8867A PDF File

RT8867A
RT8867A

Overview
® RT8867A Advanced 4/3-Phase PWM Controller for CPU Core Power General Description The RT8867A is an advanced 4/3-phase synchronous buck controller with 3 integrated MOSFET drivers.
It integrates an 8-bit DAC that supports Intel VR11.
x CPUs power application.
The IC adopts state-of-the-art dynamic phase control capability by PS1/2/3 pins and achieves high efficiency over a wide load range.
It uses lossless RDS(ON) current sensing to achieve phase current balance.
Other features include adjustable operating frequency, adjustable softstart, short circuit protection, adjustable over current protection, over voltage protection, under voltage protection, power good indication, VR_HOT indication and VR_SHDN indication.
The RT8867A is available in a small footprint with WQFN48L 6x6 package.
Ordering Information RT8867A Package Type QW : WQFN-48L 6x6 (W-Type) Note : Lead Plating System Z : ECO (Ecological Element with Halogen Free and Pb free) Richtek products are : ` RoHS compliant and compatible with the current require- ments of IPC/JEDEC J-STD-020.
` Suitable for use in SnPb or Pb-free soldering processes.
Marking Information RT8867A ZQW YMDNN RT8867AZQW : Product Number YMDNN : Date Code Features z 12V Power Supply Voltage z 4/3-Phase Power Conversion z Integrated 3 MOSFET Drivers with Internal Bootstrap Diode z Dynamic Phase Control Capability z 8-bit DAC Supports Intel VR11.
x CPUs z Lossless RDS(ON) Current Sensing for Current Balance z Adjustable Frequency : 50kHz to 1MHz z Adjustable Over Current Protection z Adjustable Soft-Start z VR_RDY, VR_HOT and VR_SHDN Indications z Small 48-Lead WQFN Package z RoHS Compliant and Halogen Free Applications z Desktop CPU Core Power z Middle/High End Graphic Cards z Low Voltage, High Current DC/ DC Converters Pin Configurations (TOP VIEW) VR_RDY VRSEL FBRTN VID0 VID1 VID2 VID3 VID4 VID5 VID6 VID7 BOOT1 48 47 46 45 44 43 42 41 40 39 38 37 PS2 1 SS 2 EN 3 DAC 4 EAP 5 FB 6 COMP 7 CSP 8 CSN 9 IMAX 10 PS3/VR_SHDN 11...


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