MAX1981A
Quick-PWM Master Controllers for Voltage-Positioned CPU Core Power Supplies (IMVP-IV)
Single-Phase CPU Controller for IMVP-IV
Part Details
- Quick-PWM Master Controllers
- Multiphase Conversion with Slave Controller (MAX1980)
- Active Voltage Positioning with Adjustable Gain and Offset
- Adjustable Slew Rate Control
- ±0.75% VOUT Accuracy Over Line, Load, and Temperature
- 6-Bit On-Board DAC (16mV Increments)
- 0.700V to 1.708V Output Adjust Range
- Selectable 200kHz/300kHz/550kHz/1000kHz Switching Frequency
- 2V to 28V Battery Input Voltage Range
- Drive Large Synchronous Rectifier MOSFETs
- Output Overvoltage Protection (MAX1907A Only)
- Undervoltage and Thermal Fault Protection
- Power Sequencing and Selectable Boot Voltage
- Low-Profile 40-Pin Thin QFN, 6mm x 6mm Package
The MAX1907A/MAX1981A are single-phase, Quick-PWM™ master controllers for IMVP-IV™ CPU core supplies. Multiphase operation is achieved using a Quick-PWM slave controller (MAX1980). Multiphase operation reduces input ripple current requirements and output voltage ripple while easing component selection and layout difficulties. The MAX1907A/MAX1981A include active voltage positioning with adjustable gain and offset, reducing power dissipation and bulk output capacitance requirements.
The MAX1907A/MAX1981A are intended for two different notebook CPU core applications: either bucking down the battery directly, or 5V system supply to create the core voltage. The single-stage conversion method allows these devices to directly step down high-voltage batteries for the highest possible efficiency. Alternatively, two-stage conversion (stepping down the 5V system supply instead of the battery) at higher switching frequency provides the minimum possible physical size.
The MAX1907A/MAX1981A meet the IMVP-IV specifications and include logic to interface with the CPU power good signals from the VCCP and VCCMCH rails within the system. The regulator features power-up sequencing, automatically ramping up to the Intel-specified boot voltage. The MAX1907A/MAX1981A feature independent four-level logic inputs for setting the boot voltage (B0–B2) and the suspend voltage (S0–S2).
The MAX1907A/MAX1981A include output undervoltage protection, thermal protection, and system power-OK (SYSPOK) input/output. When any of these protection features detect a fault, the MAX1907A/MAX1981A immediately shut down. Additionally, the MAX1907A includes overvoltage protection.
The MAX1907A/MAX1981A are available in a thin 40-pin QFN package.
Applications
- Servers/Desktop Computers
- Voltage-Positioned Step-Down Converters
Documentation
This is the most up-to-date revision of the Data Sheet.
Hardware Ecosystem
Parts | Product Life Cycle | Description |
---|---|---|
VID Voltage Programmers 1 | ||
MAX8796 | PRODUCTION | 1-Phase, Quick-PWM Intel IMVP-6/GMCH Controllers |
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