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MAX17480

更新时间： 2024-11-14 11:18:19
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美信 - MAXIM 控制器
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48页 989K
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AMD 2-/3-Output Mobile Serial VID Controller

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MAX17480 数据手册

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19-4443; Rev 0; 2/09  
AMD 2-/3-Output Mobile Serial  
VID Controller  
MAX17480  
General Description  
Features  
o Dual-Output Fixed-Frequency Core Supply  
Controller  
Split or Combinable Outputs Detected at  
The MAX17480 is a triple-output, step-down, fixed-  
frequency controller for AMD’s serial VID interface (SVI)  
CPU and northbridge (NB) core supplies. The MAX17480  
consists of two high-current SMPSs for the CPU cores  
and one 4A internal switch SMPS for the NB core. The  
two CPU core SMPSs run 180° out-of-phase for true  
interleaved operation, minimizing input capacitance.  
The 4A internal switch SMPS runs at twice the switching  
frequency of the core SMPS, reducing the size of the  
external components.  
Power-Up  
Dynamic Phase Selection Optimizes  
Active/Sleep Efficiency  
Transient Phase Repeat Reduces Output  
Capacitance  
True Out-of-Phase Operation Reduces Input  
Capacitance  
Programmable AC and DC Droop  
Accurate Current Balance and Current Limit  
Integrated Drivers for Large Synchronous-  
Rectifier MOSFETs  
Programmable 100kHz to 600kHz Switching  
Frequency  
The MAX17480 is fully AMD SVI compliant. Output volt-  
ages are dynamically changed through a 2-wire SVI,  
allowing the SMPSs to be individually programmed to  
different voltages. A slew-rate controller allows con-  
trolled transitions between VID codes and controlled  
soft-start. SVI also allows each SMPS to be individually  
set into a low-power pulse-skipping state.  
Transient phase repeat improves the response of the  
fixed-frequency architecture, reducing the total output  
capacitance for the CPU core. A thermistor-based tem-  
perature sensor provides a programmable thermal-fault  
output (VRHOT).  
4V to 26V Battery Input Voltage Range  
o 4A Internal Switch Northbridge SMPS  
2.7V to 5.5V Input Voltage Range  
2x Programmable Switching Frequency  
The MAX17480 includes output overvoltage protection  
(OVP), undervoltage protection (UVP), and thermal pro-  
tection. When any of these protection features detect a  
fault, the controller shuts down. True differential current  
sensing improves current limit and load-line accuracy.  
The MAX17480 has an adjustable switching frequency,  
allowing 100kHz to 600kHz operation per core SMPS,  
and twice that for the NB SMPS.  
75mΩ/40mΩ Power Switches  
o
0.5ꢀ V  
Accuracy over Line, Load, and  
OUT  
Temperature  
o AMD SVI-Compliant Serial Interface with  
Switchable Address  
o 7-Bit On-Board DAC: 0 to +1.550V Output Adjust  
Range  
o Integrated Boost Switches  
o Adjustable Slew-Rate Control  
Applications  
Mobile AMD SVI Core Supplies  
Multiphase CPU Core Supplies  
Voltage-Positioned, Step-Down Converters  
Notebook/Desktop Computers  
o Power-Good (PWRGD) and Thermal-Fault  
(VRHOT) Outputs  
o System Power-OK (PGD_IN) Input  
o Overvoltage, Undervoltage, and Thermal-Fault  
Protection  
o Voltage Soft-Startup and Passive Shutdown  
o < 1µA Typical Shutdown Current  
Ordering Information  
PART  
TEMP RANGE  
PIN-PACKAGE  
MAX17480GTL+  
-40°C to +105°C  
40 TQFN-EP*  
+Denotes a lead(Pb)-free/RoHS-compliant package.  
*EP = Exposed pad.  
Pin Configuration appears at end of data sheet.  
________________________________________________________________ Maxim Integrated Products  
1
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,  
or visit Maxim’s website at www.maxim-ic.com.  
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