19-4175; Rev 1; 5/09
AMD 2-/3-Output Mobile Serial
VID Controller
MAX1780
General Description
Features
o Dual-Output Fixed-Frequency Core Supply
Controller
Split or Combinable Outputs Detected at
The MAX17080 is a triple-output, step-down, fixed-
frequency controller for AMD’s serial VID interface (SVI)
CPU and northbridge (NB) core supplies. The MAX17080
consists of two high-current SMPSs for the CPU cores
and one 3A 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 3A 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 MAX17080 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 3A Internal Switch Northbridge SMPS
2.7V to 5.5V Input Voltage Range
2x Programmable Switching Frequency
The MAX17080 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 MAX17080 has an adjustable switching frequency,
allowing 100kHz to 600kHz operation per core SMPS,
and twice that for the NB SMPS.
100mΩ/50mΩ 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
MAX17080GTL+
-40°C to +105°C
40 TQFN
+Denotes a lead(Pb)-free and RoHS-compliant package.
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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