MAX1711
PRODUCTIONHigh-Speed, Digitally Adjusted Step-Down Controllers for Notebook CPUs
Digitally Adjustable Step-Down Controller Powers 12A Mobile Processors with Only Four Output Capacitors
- Part Models
- 2
- 1ku List Price
- price unavailable
Overview
- Ultra-High Efficiency
- No Current-Sense Resistor (Lossless ILIMIT)
- Quick-PWM with 100ns Load-Step Response
- ±1% VOUT Accuracy over Line and Load
- 4-Bit On-Board DAC (MAX1710)
- 5-Bit On-Board DAC (MAX1711/MAX1712)
- 0.925V to 2V Output Adjust Range (MAX1711/MAX1712)
- 2V to 28V Battery Input Range
- 200/300/400/550kHz Switching Frequency
- Remote GND and VOUT Sensing
- Over/Undervoltage Protection
- 1.7ms Digital Soft-Start
- Drive Large Synchronous-Rectifier FETs
- 2V ±1% Reference Output
- Power-Good Indicator
- Small 24-Pin QSOP Package
The MAX1710/MAX1711 step-down controllers are intended for core CPU DC-DC converters in notebook computers. They feature a triple-threat combination of ultra-fast transient response, high DC accuracy, and high efficiency needed for leading-edge CPU core power supplies. Maxim's proprietary Quick-PWM™ quick-response, constant-on-time PWM control scheme handles wide input/output voltage ratios with ease and provides 100ns "instant-on" response to load transients while maintaining a relatively constant switching frequency.
High DC precision is ensured by a 2-wire remote-sensing scheme that compensates for voltage drops in both the ground bus and supply rail. An on-board, digital-to-analog converter (DAC) sets the output voltage in compliance with Mobile Pentium II® CPU specifications.
The MAX1710 achieves high efficiency at a reduced cost by eliminating the current-sense resistor found in traditional current-mode PWMs. Efficiency is further enhanced by an ability to drive very large synchronous-rectifier MOSFETs.
Single-stage buck conversion allows these devices 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 a higher switching frequency allows the minimum possible physical size.
The MAX1710/MAX1711 are identical except that the MAX1711 have 5-bit DACs and the MAX1710 has a 4-bit DAC. Also, the MAX1711 has a fixed overvoltage protection threshold at VOUT = 2.25V and undervoltage protection at VOUT = 0.8V whereas the MAX1710 has variable thresholds that track VOUT. The MAX1711 is intended for applications where the DAC code may change dynamically.
Applications
- CPU Core DC-DC Converters
- Docking Stations
- Notebook Computers
- Single-Stage (BATT to VCORE) Converters
- Two-Stage (+5V to VCORE) Converters
Documentation
Data Sheet 1
Technical Articles 3
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.
| Part Model | Pin/Package Drawing | Documentation | CAD Symbols, Footprints, and 3D Models |
|---|---|---|---|
| MAX1711EEG+ | QSOP | ||
| MAX1711EEG+T | QSOP |
| Part Models | Product Lifecycle | PCN |
|---|---|---|
|
Jul 3, 2023 - 2361NA WAFER FAB |
||
| MAX1711EEG+ | PRODUCTION | |
| MAX1711EEG+T | PRODUCTION | |
This is the most up-to-date revision of the Data Sheet.
Software Resources
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Request a Driver/SoftwareEvaluation Kits
Voltage-Positioning Evaluation Kit for the MAX1711
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