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RTQ8825 PDF预览

RTQ8825

更新时间： 2024-11-13 17:01:07
品牌 Logo 应用领域
立锜 - RICHTEK /
页数 文件大小 规格书
77页 2130K
描述
Dual Rail 3+2-Phase PWM Controller with PMBus

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RTQ8825 数据手册

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RTQ8825  
Dual Rail 3+2-Phase PWM Controller with PMBus  
General Description  
Features  
⚫ 3/2/1/0 Phase (rail A) + 2/1/0 Phase (rail B) PWM  
The RTQ8825 is a dual output voltage rail 3+2-phase  
controller: a 3/2/1/0 phase synchronous buck controller,  
the rail A and a 2/1/0 phase synchronous buck  
Controller  
TM  
⚫ G-NAVP  
(Green Native Adaptive Voltage  
TM  
Positioning) Topology  
controller, the rail B. The RTQ8825 adopts G-NAVP  
⚫ Each Output Voltage Ranges 0.25V to 1.516V  
⚫ Embedded LDO for Dr.MOS 3.3V PWM Level  
⚫ Pin Programmable 27 VBOOT Voltages  
⚫ Current Sensing by Either Current Type or Voltage  
Type SPS  
(Green Native AVP) which is Richtek’s proprietary  
topology derived from finite DC gain of EA amplifier with  
current mode control, making it easy to set the droop to  
support all CPU/Microprocessor requirements of AVP  
(Adaptive Voltage Positioning). Based on the G-  
TM  
⚫ Digital Current Balancing With Programmable Gain  
for Thermal Balancing  
NAVP  
topology, the RTQ8825 features a new  
generation of quick response mechanism (Adaptive  
Quick Response, AQR) to optimize AVP performance  
during load transient and reduce output capacitors. The  
RTQ8825 supports VID on-the-fly function with four  
different slew rates via PMBus command setting. The  
DAC converts the VOUT_COMMAND code ranging  
from 0.25V to 1.516V with 1.953mV per step. The  
RTQ8825 integrates a high accuracy ADC for platform  
and function settings, such as SPS type, PMBus  
address, boot voltage and load-line. The RTQ8825  
provides reset Vout function, Vout to be set to the  
VBOOT value while RESET# pin is asserted low. The  
RTQ8825 provides VR_Ready and thermal indicators.  
It also features complete fault protection functions  
including over-voltage (OV), under-voltage (UV), slow  
over-current (SLOW_OC), fast over-current (Fast_OC),  
over-temperature (OT) and under-voltage lockout  
(UVLO). The RTQ8825 more supports several  
functions which can be set by I2C/PMBus interface.  
⚫ Differential Output Voltage Sense for High  
Output Accuracy  
⚫ Supports Start-Up Into Pre-Bias Voltage  
⚫ Pin Selection for Enabling Load-Line Function  
⚫ Supports Returning to VBOOT from Existing  
Voltage or from 0V  
⚫ PMBus v1.3 Compliant Serial Interface  
Pin Selectable 16 Addresses  
1.8V and 3.3V Logic Level Compliant  
SMBALERT#  
Internal Non-Volatile Memory (NVM) to Store  
Custom Configurations  
Programmable Power Up/Down Timing  
Monitoring for V  
, I  
and Temperature  
OUT OUT  
Selectable Latch or Autonomous Recovery  
After Shutdown Due to Fault  
Extensive Fault Detection and Protection  
Capability  
VIN & VCC Input Pins UVLO  
Applications  
⚫ Networking system  
Averaged Output SLOW/FAST_OC Protection  
Output OV & UV Protection  
⚫ Telecom, Datacom and Server system  
⚫ Point-of-load power supply (DSP, ASIC, FPGA)  
Output Temperature Warning & Protection  
Indicator for VR_Ready & VR_Hot#  
⚫ Small 48-Lead WQFN Package  
Simplified Application Circuit  
RTQ8825  
SPS  
VR_HOT#  
SMBALERT#  
I2C_SCL  
PWMA1  
PWMA2  
PWMA3  
SPS  
SPS  
Channel A  
Channel B  
I2C_SDA  
To System Host/  
Bus Master  
VR_READYA  
VR_READYB  
SPS  
PWMB1  
RESET#  
ENA  
SPS  
PWMB2  
DRVEN  
To SPS  
ENB  
Copyright © 2024 Richtek Technology Corporation. All rights reserved.  
is a registered trademark of Richtek Technology Corporation.  
DSQ8825-01 February 2024  
www.richtek.com  
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