Document
CONFIDENTIAL INFORMATION—RESTRICTED TO INTEL® IMVP-6 LICENSEES
19-2452; Rev 1; 8/08
KIT ATION EVALU E L B A IL AVA
1-Phase Quick-PWM Intel IMVP-6/GMCH Controller
General Description Features
o 1-Phase Quick-PWM Controller o ±0.5% VOUT Accuracy Over Line, Load, and Temperature o 7-Bit IMVP-6 DAC (MAX8796/MAX17401 Only) o 5-Bit GMCH DAC o Active Voltage Positioning with Adjustable Gain o Accurate Droop and Current Limit o Remote Output and Ground Sense o Adjustable Output-Voltage Slew Rate o Power-Good Window Comparator o Power Monitor o Temperature Comparator o Drives Large Synchronous Rectifier FETs o 2V to 26V Power Input Range o Adjustable Switching Frequency (600kHz max) o Output Overvoltage Protection (MAX8796/ MAX8797 Only) o Undervoltage and Thermal-Fault Protection o Soft-Startup and Soft-Shutdown o Internal Boost Diodes
MAX8796/MAX8797/MAX17401
The MAX8796/MAX8797/MAX17401 are 1-phase QuickPWM™ step-down VID power-supply controllers for Intel notebook CPUs and graphics. The Quick-PWM control provides instantaneous response to fast load current steps. Active voltage positioning reduces power dissipation and bulk output capacitance requirements and allows ideal positioning compensation for tantalum, polymer, or ceramic bulk output capacitors. The MAX8796/MAX8797/MAX17401 are intended for two different notebook CPU/GPU core applications: either bucking down the battery directly to create the core voltage, or else bucking down the +5V system supply. The single-stage conversion method allows this device to directly step down high-voltage batteries for the highest possible efficiency. Alternatively, 2-stage conversion (stepping down the +5V system supply instead of the battery) at higher switching frequency provides the minimum possible physical size. A slew-rate controller allows controlled transitions between VID codes. A thermistor-based temperature sensor provides programmable thermal protection. A power monitor provides an analog voltage output proportional to the power consumed by the CPU/GPU. The MAX8796/MAX17401 implement both the Intel IMVP-6 CPU core specifications, as well as the Intel GMCH graphics core specifications. The MAX8797 implements the Intel GMCH graphics core specifications. The MAX8796/MAX17401 are available in a 32pin TQFN package. The MAX8797 is available in a 28-pin TQFN package.
Pin Configurations
BST VDD
TOP VIEW
D5 (STDBY)
PGND
D6
DL
D4 18
24 LX 25 DH 26 PGDIN 27 VRHOT 28 TIME 29 ILIM 30 VCC 31 CCV 32 12 PWR
23
22
21
20
19
17 16 15 14 D2 D1 D0 V3P3 (GMCH) CLKEN SHDN PWRGD TON
Applications
IMVP-6/IMVP-6+ Core Power Supply Intel GMCH Crestline/Cantiga Graphics Core Power Supply Voltage-Positioned Step-Down Converters 2 to 4 Lithium-Ion (Li+) Cell Battery-to-CPU Core Supply Converters Notebooks/Desktops/Servers
Quick-PWM is a trademark of Maxim Integrated Products, Inc.
MAX8796 MAX17401
PAD GND
D3 13 12 11 10 9 8 THRM
3 FB GNDS
4 CSN
5 CSP
6 DPRSTP
7 DPRSLPVR
THIN QFN 5mm x 5mm
Pin Configur.