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Analog Devices Inc./Maxim Integrated MAX1711EEG-TG068
- Part No.:
- MAX1711EEG-TG068
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Special Purpose Regulators
- Package:
- 24-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
MAX1711EEG-TG068.pdf
- Description:
- ADJUSTED STEP-DOWN CONTROLLER
- Quantity:
- Payment:
- Shipping:
Inventory:1,000
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Product details
Overview
MAX1711EEG-TG068 from Maxim Integrated is a high-speed, digitally adjusted step-down DC-DC controller IC designed for CPU core power supplies in notebook computers. It delivers ±1% VOUT accuracy over line and load, 100ns load-step response via Quick-PWM™ architecture, and supports 0.925V–2.0V output adjustment via 5-bit DAC - all in a 24-pin QSOP package rated for –40°C to +85°C operation.
For engineers reviewing the MAX1711EEG-TG068 datasheet, MAX1711EEG-TG068 pinout, MAX1711EEG-TG068 application, or MAX1711EEG-TG068 equivalent, this controller is selected for high-efficiency, low-voltage (sub-2V), high-current (up to 7A) CPU core regulation where fast transient response, remote sensing, and programmable overvoltage/undervoltage protection are critical design requirements.
Technical Context
The MAX1711EEG-TG068 implements Maxim's proprietary Quick-PWM™ constant-on-time control with input voltage feed-forward, enabling stable switching frequency across wide input (2V–28V battery) and output (0.925V–2.0V) ranges. Its dual-sense architecture uses separate FB (local) and FBS/GNDS (remote) inputs to compensate for PCB trace IR drops in both supply and ground paths.
It integrates a 5-bit DAC for precise digital output voltage selection, fixed 2.25V overvoltage and 0.8V undervoltage protection thresholds, and gate drivers capable of driving large synchronous-rectifier MOSFETs - with DH on-resistance ≤5Ω and DL pulldown resistance ≤1.7Ω - supporting efficient single-stage (battery-to-VCORE) or two-stage (+5V-to-VCORE) conversion topologies.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage Range | 0.925V to 2.0V - digitally set via 5-bit DAC; enables compliance with Mobile Pentium II® core voltage specifications. |
| DC Output Accuracy | ±1% over line/load/temperature - achieved via 2-wire remote sensing and precision internal reference (2.0V ±1%). |
| Load-Step Response | 100ns - ultra-fast transient recovery enabled by Quick-PWM™ architecture without sacrificing switching frequency stability. |
| Input Voltage Range | 2V to 28V - supports direct battery input (e.g., 3-cell Li-ion up to 12.6V or 4-cell up to 16.8V) and system rail inputs. |
| Switching Frequency | 200/300/400/550kHz - selectable via TON pin strapping; allows noise-sensitive band avoidance and inductor size optimization. |
| OVP/UVP Thresholds | Fixed 2.25V OVP and 0.8V UVP - eliminates need for external resistor dividers while ensuring robust CPU rail fault protection. |
| Package | 24-pin QSOP - surface-mount, thermally enhanced package compatible with standard reflow processes and space-constrained notebook layouts. |
Pinout & Package
MAX1711EEG-TG068 is housed in a 24-pin QSOP (Quad Small Outline Package) with 0.635mm pitch, JEDEC MS-013AC compliant, and rated for –40°C to +85°C ambient operation. Thermal pad not present; power dissipation limited to 762mW at +70°C.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| V+ | Battery voltage sense input | Feeds input voltage to PWM one-shot timing circuit; enables VIN-dependent on-time scaling for near-constant frequency operation. |
| SHDN | Active-low shutdown control | Puts controller into low-quiescent state (<1µA); forces DL high during shutdown to maintain OVP latch integrity. |
| DH | High-side gate driver output | Drives upper N-MOSFET gate (LX to BST swing); ≤5Ω on-resistance supports fast turn-on of large synchronous FETs. |
| LX | Inductor switch node | Connects to buck inductor; serves as return path for DH driver and noninverting input to current-limit comparator. |
| DL | Low-side gate driver output | Drives lower N-MOSFET gate (0–VDD swing); ≤1.7Ω pulldown resistance ensures rapid synchronous rectifier turn-off. |
| BST | Bootstrap capacitor connection | Provides floating supply for DH driver; optional series resistor tunes LX rise time to prevent shoot-through. |
| ILIM | Current-limit threshold adjust | Accepts external resistor to GND; sets adjustable current limit (e.g., 40mV = 4A with RLIM = 100kΩ). |
| FBS | Remote VOUT sense input | Connects directly to CPU VCORE pad; compensates for supply rail IR drop to maintain true load-point regulation. |
| GNDS | Remote ground sense input | Connects directly to CPU ground plane; compensates for ground path IR drop to eliminate sensing offset error. |
| FB | Local feedback input | Connects to bulk output capacitors; used with external divider if DAC is disabled or for analog voltage programming. |
| REF | 2.0V precision reference output | Stable 2.0V ±1% source for external circuits; can sink/source up to 50µA without degrading FB accuracy. |
| CC | Integrator capacitor connection | Connects 470pF capacitor to GND; sets compensation zero for loop stability across full load and input range. |
| D0–D4 | 5-bit DAC code inputs | LSB to MSB digital inputs (5µA pull-up to VCC); define 32 discrete output voltages between 0.925V and 2.0V. |
| TON | On-time selection control | 4-level strap: GND=550kHz, REF=400kHz, open=300kHz, VCC=200kHz - selects K-factor for on-time calculation. |
| SKIP | Low-noise mode control | GND = normal pulse-skipping; VCC = forced PWM mode suppresses light-load acoustic noise and EMI. |
| PGOOD | Open-drain power-good indicator | Asserts after soft-start when VOUT is within ±8.5% of target; 1.5µs propagation delay enables tight sequencing. |
| VCC / VDD | Analog / gate-drive bias supplies | Separate 4.5–5.5V inputs reduce coupling; VCC powers PWM core, VDD drives DL - improves efficiency vs. integrated LDO. |
| PGND / GND | Power / analog ground returns | Separated grounds minimize noise coupling between high di/dt power paths and sensitive analog sensing circuits. |
Key Features
| Feature | Design Value |
|---|---|
| No current-sense resistor | Eliminates I²R loss and board area for sense resistor; uses MOSFET RDS(on) and filter ESR for lossless current limiting. |
| Digital soft-start | 1.7ms monotonic ramp prevents inrush current and overshoot during startup; controlled by internal DAC and integrator. |
| Remote sensing (FB/FBS + GNDS/GND) | Compensates for up to 25mV total IR drop across supply and ground paths - essential for <1% regulation at CPU die. |
| Quick-PWM™ architecture | Delivers 100ns load-step response while maintaining ±10% frequency variation - avoids audible noise and EMI peaks. |
| Programmable OVP/UVP | Fixed 2.25V OVP and 0.8V UVP thresholds ensure immediate fault shutdown without external components or calibration. |
| Large FET drive capability | DH/DL drivers support >1A peak gate current and <5Ω on-resistance - enables use of low-RDS(on) MOSFETs for >90% efficiency at 7A. |
Applications
| Notebook CPU Core Supply | Docking Station Power |
|---|---|
Use Scenario: Regulating sub-2V, high-current (up to 7A) core voltage for Mobile Pentium II® and compatible CPUs under dynamic load steps (0A→7A in <100ns). IC Role / Device Role / Timing Role: Primary step-down controller managing high-side/low-side MOSFET switching, DAC-based voltage setting, and real-time load transient correction. Use Value: Enables ±1% output accuracy at point-of-load and 100ns transient recovery - critical for CPU stability during clock throttling and burst-mode operation. |
Use Scenario: Providing isolated, high-efficiency VCORE rail in docking stations that must support multiple notebook configurations and thermal constraints. IC Role / Device Role / Timing Role: Standalone buck controller accepting either battery or +5V system rail input, with programmable frequency and remote sensing for flexible layout. Use Value: Supports both single-stage (battery-to-VCORE) and two-stage (+5V-to-VCORE) topologies - reduces BOM count and simplifies thermal management across platforms. |
| Single-Stage Battery Converter | Two-Stage System Rail Converter |
Use Scenario: Direct conversion from 3S/4S Li-ion battery (9–16.8V) to 1.3–1.85V CPU core rail in ultra-thin notebooks with strict size and efficiency targets. IC Role / Device Role / Timing Role: High-efficiency buck controller using Quick-PWM™ to maintain >90% efficiency across 4.5–24V input and 7A load. Use Value: Eliminates intermediate conversion stage - improves overall system efficiency by 3–5% and reduces component count and heat generation. |
Use Scenario: Generating VCORE from stable +5V system supply in docking stations or base units where battery voltage varies widely or is unavailable. IC Role / Device Role / Timing Role: High-frequency (550kHz) buck controller enabling smallest possible inductor (0.7µH) and ceramic output capacitors (4×47µF). Use Value: Reduces solution footprint by >40% vs. 300kHz design - critical for compact docking station PCB real estate and EMI filtering simplicity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX1710EEG | 4-bit DAC (16 codes), variable OVP/UVP thresholds tracking VOUT, no D4 pin | Suitable for fixed-output or less granular voltage adjustment; lacks MAX1711's 32-step precision and fixed fault thresholds | Select MAX1710EEG only if DAC resolution >16 steps and fixed OVP are unnecessary - saves cost in static-core designs. |
| MAX1712EEG | 5-bit DAC with narrower 1.1V–1.85V output range; optimized for newer low-voltage CPUs | Targeted at next-generation mobile processors requiring tighter low-end regulation (e.g., 1.1V minimum) | Choose MAX1712EEG when design requires guaranteed 1.1V start-up and tighter mid-range accuracy - not a drop-in replacement for MAX1711EEG-TG068. |
Compared with MAX1710EEG and MAX1712EEG, the MAX1711EEG-TG068 provides the broadest output range (0.925V–2.0V) with fixed protection thresholds - making it optimal for legacy and transitional Mobile Pentium II® platforms requiring both fine-grained DAC control and deterministic fault response.
Availability
MAX1711EEG-TG068 is available at Aetrix Electronics and suitable for notebook computer power supplies, docking station DC-DC converters, and CPU core voltage regulation systems requiring stable component supply, long-term lifecycle support, and validated thermal performance across –40°C to +85°C.
Supply support for MAX1711EEG-TG068 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Maxim Integrated (now part of Analog Devices) is a semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for computing, communications, and industrial applications.
The MAX1710/MAX1711/MAX1712 product line was engineered specifically for high-efficiency, fast-transient CPU core power in portable computing - emphasizing digital voltage programming, lossless current limiting, and robust remote sensing for sub-2V regulation.
FAQ
What is the output voltage adjustment resolution of the MAX1711EEG-TG068?
The MAX1711EEG-TG068 features a 5-bit DAC with 32 discrete output codes, enabling voltage adjustment from 0.925V to 2.0V in approximately 35mV steps. This resolution supports precise compliance with Mobile Pentium II® core voltage specifications and allows fine-tuning for margin testing and binning. The DAC outputs are verified across temperature and load in the datasheet's Table 2.
Does the MAX1711EEG-TG068 require an external current-sense resistor?
No, the MAX1711EEG-TG068 does not require an external current-sense resistor. It implements lossless current limiting by monitoring the voltage across the synchronous rectifier MOSFET's RDS(on) and the output capacitor ESR. The ILIM pin accepts an external resistor to set the trip threshold (e.g., 100kΩ → 40mV = 4A), eliminating I²R losses and PCB area associated with discrete sense resistors.
How does the MAX1711EEG-TG068 achieve 100ns load-step response?
The MAX1711EEG-TG068 achieves 100ns load-step response through its proprietary Quick-PWM™ architecture - a constant-on-time control scheme with input voltage feed-forward and fast error amplifier. Unlike traditional current-mode PWMs, it avoids latency from current-sense amplifiers and fixed-frequency clock dependencies, allowing immediate DH re-triggering upon load change while maintaining frequency stability.
What is the purpose of the FBS and GNDS pins on the MAX1711EEG-TG068?
The FBS (feedback remote-sense) and GNDS (ground remote-sense) pins on the MAX1711EEG-TG068 enable true point-of-load regulation by compensating for IR drops in both the power supply trace and ground return path. FBS connects directly to the CPU VCORE pad, GNDS to the CPU ground plane - allowing the controller to regulate voltage *at the die*, not at the converter output, achieving ±1% accuracy under dynamic load.
Can the MAX1711EEG-TG068 operate from a single +5V supply instead of a battery input?
Yes, the MAX1711EEG-TG068 can operate from a +5V system supply (e.g., notebook 5V rail) by connecting V+ to VCC/VDD and configuring for two-stage conversion. Its 2V–28V input range accommodates +5V directly; TON pin strapping selects higher switching frequencies (e.g., 550kHz) to minimize inductor size. However, V+ must remain within absolute max ratings (–0.3V to +30V), and SHDN sequencing must ensure V+ is present before enabling.
MAX1711EEG-TG068 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 24-SSOP (0.154", 3.90mm Width)
- Packaging:
- Bulk
- Product Status:
- Active
- Applications:
- Controller, Notebook Power System
- Voltage - Input:
- 2V ~ 5.5V, 4.5V ~ 28V
- Number of Outputs:
- 1
- Voltage - Output:
- 0.925V ~ 2V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 24-QSOP
MAX1711EEG-TG068 FAQ
1.How can I place an order for MAX1711EEG-TG068 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX1711EEG-TG068 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for MAX1711EEG-TG068 reliable?
The price and inventory of MAX1711EEG-TG068 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1711EEG-TG068 is usually 5 days.
3.What payment methods are accepted for MAX1711EEG-TG068?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1711EEG-TG068 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX1711EEG-TG068?
MAX1711EEG-TG068 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX1711EEG-TG068 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for MAX1711EEG-TG068?
For technical support, including MAX1711EEG-TG068 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1711EEG-TG068 requirements.
6.How does Aetrix verify that MAX1711EEG-TG068 is sourced from the original manufacturer or authorized distributors?
All MAX1711EEG-TG068 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that MAX1711EEG-TG068 meets industry standards.
7.What is the process for return or replacement of MAX1711EEG-TG068?
All MAX1711EEG-TG068 units undergo pre-shipment inspection (PSI). If there is an issue with MAX1711EEG-TG068, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The MAX1711EEG-TG068 part is unused and in its original packaging.
Return procedure for MAX1711EEG-TG068:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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