RT8880A – Dual-Output PWM Controller

Part Number : RT8880A

Function : Dual-Output PWM Controller

Manufactures : Richtek

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RT8880A image

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Description :

® RT8880A Dual-Output PWM Controller with 3 Integrated Drivers for AMD SVI2 Mobile CPU Power Supply General Description The RT8880A is a 3 + 2 phases PWM controller, and is compliant with AMD SVI2 Voltage Regulator Specification to support both CPU core (VDD) and Northbridge portion of the CPU (VDDNB). The RT8880A features CCRCOT (Constant Current Ripple Constant On-Time) with G-NAVP (Green-Native AVP), which is Richtek’s proprietary topology. The G-NAVP makes it an easy setting controller to meet all AMDAVP (Adaptive Voltage Positioning) VDD/ VDDNB requirements. The droop is easily programmed by setting the DC gain of the error amplifier. With proper compensation, the load transient response can achieve optimized AVP performance. The controller also uses the interface to issue VOTF Complete and to send digitally encoded voltage and current values for the VDD and VDDNB domains. It can operate in single phase and diode emulation mode and reach up to 90% efficiency in different modes according to different loading conditions. The RT8880A provides special purpose offset capabilities by pin setting. The RT8880A also provides power good indication, over-current indication (OCP_L) and dual OCP mechanism for AMD SVI2 CPU core and NB. It also features complete fault protection functions including overvoltage, under-voltage and negative-voltage protections. Features  3/2/1-Phase (VDD) + 2/1-Phase (VDDNB) PWM Controller  3 Embedded MOSFET Drivers  G-NAVPTM Topology  Support Dynamic Load-Line and Zero Load-Line  Diode Emulation Mode at Light Load Condition  SVI2 Interface to Comply with AMD Power Management Protocol  Build-in ADC for VOUT and IOUT Reporting  Immediate OV, UV and NV Protections and UVLO  Programmable Dual OCP Mechanism  0.5% DAC Accuracy  Fast Transient Response  Power Good Indicator  Over-Current Indicator  52-Lead WQFN Package  RoHS Compliant and Halogen Free Applications  AMD SVI2 Mobile CPU  Laptop Computer Simplified Application Circuit To CPU RT8880A OCP_L PHASE1 SVC SVD PHASE2 PWM3 PHASEA1 SVT PWMA2 MOSFET MOSFET RT9610 MOSFET RT9610 MOSFET MOSFET VVDD VVDDNB Copyright ©2015 Richtek Technology Corporation. All rights reserved. DS8880A-03 January 2015 is a registered trademark of Richtek Technology Corporation. www.richtek.com 1 RT8880A Ordering Information RT8880A Package Type QW : WQFN-52L 6×6 (W-Type) Lead Plating System G : Green (Halogen Free and Pb Free) Note : Richtek products are :  RoHS compliant and compatible with the current requirements of IPC/JEDEC J-STD-020.  Suitable for use in SnPb or Pb-free soldering processes. Marking Information RT8880A GQW YMDNN RT8880AGQW : Product Number YMDNN : Date Code Pin Configurations (TOP VIEW) PHASE2 LGATE2 PVCC LGATE1 PHASE1 UGATE1 BOOT1 LGATEA1 PHASEA1 UGATEA1 BOOTA1 PWMA2 TONSETA 52 51 50 49 48 47 46 45 44 43 42 41 40 UGATE2 1 BOOT2 2 PWM3 3 TONSET 4 ISEN2P 5 ISEN2N 6 ISEN1N 7 ISEN1P 8 ISEN3P 9 ISEN3N 10 […]

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RT8880A Datasheet

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