MAX17480 Maxim Integrated Products, MAX17480 Datasheet

MAX17480

Manufacturer Part Number

MAX17480

Description

AMD 2-/3-Output Mobile Serial VID Controller

Manufacturer

Maxim Integrated Products

Datasheet

1.MAX17480.pdf (48 pages)

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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.

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).

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.

19-4443; Rev 0; 2/09

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.

Pin Configuration appears at end of data sheet.

Mobile AMD SVI Core Supplies

Multiphase CPU Core Supplies

Voltage-Positioned, Step-Down Converters

Notebook/Desktop Computers

________________________________________________________________ Maxim Integrated Products

General Description

Applications

AMD 2-/3-Output Mobile Serial

o Dual-Output Fixed-Frequency Core Supply

o 4A Internal Switch Northbridge SMPS

o ±0.5% V

o AMD SVI-Compliant Serial Interface with

o 7-Bit On-Board DAC: 0 to +1.550V Output Adjust

o Integrated Boost Switches

o Adjustable Slew-Rate Control

o Power-Good (PWRGD) and Thermal-Fault

o System Power-OK (PGD_IN) Input

o Overvoltage, Undervoltage, and Thermal-Fault

o Voltage Soft-Startup and Passive Shutdown

o < 1µA Typical Shutdown Current

+ Denotes a lead(Pb)-free/RoHS-compliant package.

* EP = Exposed pad.

MAX17480GTL+

Controller

Temperature

Switchable Address

Range

(VRHOT) Outputs

Protection

PART

Split or Combinable Outputs Detected at

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

4V to 26V Battery Input Voltage Range

2.7V to 5.5V Input Voltage Range

2x Programmable Switching Frequency

75mΩ/40mΩ Power Switches

OUT

Accuracy over Line, Load, and

-40°C to +105°C

VID Controller

TEMP RANGE

Ordering Information

PIN-PACKAGE

Features

40 TQFN-EP*

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