MAX17009 Datasheet, PDF (1/45 Pages) Maxim Integrated Products – AMD Mobile Serial VID Dual-Phase Fixed-Frequency Controller

19-0814; Rev 0; 5/07
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AMD Mobile Serial VID Dual-Phase
Fixed-Frequency Controller
General Description
The MAX17009 is a 2-phase, step-down interleaved,
fixed-frequency controller for AMD’s^® serial VID inter-
face (SVI) CPU core supplies. Power-on detection of
the CPU configures the MAX17009 as two independent
single-phase regulators for a dual CPU core applica-
tion, or one high-current, dual-phase, combined-output
regulator for a unified core application. A reference
buffer output (NBV_BUF) sets the voltage-regulation
level for a North Bridge (NB) regulator, completing the
total CPU cores and NB power requirements.
The MAX17009 is fully AMD SVI compliant. Output volt-
ages are dynamically changed through a 2-wire serial
interface, allowing the switching regulator and the refe-
rence buffer to be individually programmed to different
voltages. A programmable slew-rate controller enables
controlled transitions between VID codes, soft-start limits
the inrush current, and soft-shutdown brings the output
voltage back down to zero without any negative ring.
Transient phase repeat improves the response of the
fixed-frequency architecture. Independently program-
mable AC and DC droop and selectable offset improve
stability and reduce the total output-capacitance
requirement. A thermistor-based temperature sensor
allows for a programmable thermal-fault output
(VRHOT). The MAX17009 includes thermal-fault protec-
tion, undervoltage protection (UVP), and selectable out-
put overvoltage protection (OVP). When any of these
protection features detect a fault, the controller shuts
down. True differential current sensing improves cur-
rent limit, load-line accuracy, and current balance when
operating in combined mode. The MAX17009 has an
adjustable switching frequency, allowing 100kHz to
1.2MHz per-phase operation.
Applications
Mobile AMD SVI Core Supply
Multiphase CPU Core Supply
Voltage-Positioned, Step-Down Converters
Notebook/Desktop Computers
Pin Configuration appears at end of data sheet.
AMD is a registered trademark of Advanced Micro Devices, Inc.
Features
o Dual-Output, Fixed-Frequency, Core Supply
Controller
o Separate or Combinable Outputs Detected at
Power-Up
o Reference Buffer Output for NB Controller
o ±0.4% V_OUT Accuracy Over Line, Load, and
Temperature
o AMD SVI-Compliant Serial Interface
o 7-Bit On-Board DAC: 0 to +1.550V Output Adjust
Range
o Dynamic Phase Selection Optimizes Active/Sleep
Efficiency
o Transient Phase Repeat Reduces Output
Capacitance
o True Out-of-Phase Operation Reduces Input
Capacitance
o Integrated Boost Switches
o Programmable AC and DC Droop
o Programmable 100kHz to 1.2MHz Switching
Frequency
o Accurate Current Balance and Current Limit
o Adjustable Slew-Rate Control
o Power-Good (PWRGD) and Thermal-Fault
(VRHOT) Outputs
o System Power-OK (PGD_IN) Input
o Drives Large Synchronous-Rectifier MOSFETs
o 4V to 26V Battery Input-Voltage Range
o Overvoltage, Undervoltage, and Thermal-Fault
Protection
o Power Sequencing and Timing
o Soft-Startup and Soft-Shutdown
o < 1µA Typical Shutdown Current
Ordering Information
PART
TEMP RANGE ^PIN-
PACKAGE
PKG
CODE
MAX17009GTL+ -40°C to +105°C ^{40 TQFN-EP*,}
5mm x 5mm
+Denotes a lead-free package.
*EP = Exposed pad.
T4055-1
________________________________________________________________ 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.