My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX1711EEG
- Part No.:
- MAX1711EEG
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Special Purpose Regulators
- Package:
- 24-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
MAX1711EEG.pdf
- Description:
- IC REG PWM CTRLR 1OUT 24QSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,434
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
The MAX1711EEG 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™ control, and supports 0.925V–2.0V output adjustment via 5-bit DAC. It operates across 2V–28V battery input and drives large synchronous-rectifier MOSFETs in single-stage (BATT→VCORE) or two-stage (+5V→VCORE) topologies.
For engineers reviewing the MAX1711EEG datasheet, MAX1711EEG pinout, MAX1711EEG application, or MAX1711EEG equivalent, this controller is selected for ultra-fast transient response in mobile CPU core rails where remote sensing, digital voltage programming, and fixed-overvoltage protection at 2.25V are required.
Technical Context
The MAX1711EEG implements Maxim's proprietary Quick-PWM™ architecture - a constant-on-time, voltage-feed-forward control scheme that achieves near-constant switching frequency (200/300/400/550kHz) while delivering 100ns response to load transients. Its on-time is dynamically calculated as K × (VOUT + 0.075V) / VIN, with K set by TON pin strapping.
It integrates a 5-bit DAC for precise output voltage selection (0.925V–2.0V), fixed overvoltage protection at 2.25V, undervoltage protection at 0.8V, and dual remote-sense inputs (FB/FBS and GNDS) to compensate for PCB trace IR drops in both supply and ground paths.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage Range | 0.925V to 2.0V - digitally programmable in 25mV steps via 5-bit DAC for Mobile Pentium II® compliance. |
| Input Voltage Range | 2V to 28V - supports direct battery-to-core conversion (single-stage) or +5V system rail stepping (two-stage). |
| Switching Frequency | 200/300/400/550kHz - selectable via TON pin; enables noise-sensitive band avoidance and stable inductor ripple design. |
| Load-Step Response | 100ns - ultra-fast transient recovery critical for CPU clock-throttling load jumps up to 7A. |
| VOUT Accuracy | ±1% over line/load/temperature - achieved via 2-wire remote sensing and internal 2.0V reference (±0.02V). |
| OVP/UVP Thresholds | Fixed OVP = 2.25V, UVP = 0.8V - eliminates need for external resistor dividers and ensures deterministic fault timing. |
| Package | 24-pin QSOP - compact footprint compatible with high-density notebook PCB layouts. |
Pinout & Package
MAX1711EEG is housed in a 24-pin QSOP package (0.154" wide, -40°C to +85°C operating range), optimized for thermal performance and board space efficiency in portable systems.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| V+ | Battery voltage sense input | Feeds input voltage to PWM one-shot; sets inverse scaling of DH on-time for frequency stability across 2V–28V input. |
| SHDN | Active-low shutdown control | Pulls DL high during shutdown to enforce overvoltage protection even when powered down. |
| DH | High-side gate-driver output | Drives upper MOSFET gate from LX to BST; supports large FETs with 1A source/sink capability and 5Ω on-resistance. |
| LX | Inductor switch node | Serves as return path for DH driver, noninverting input for current-limit comparator, and zero-crossing detection point. |
| DL | Low-side gate-driver output | Swings 0–VDD; features 0.5Ω pulldown/5Ω pullup resistance and 3A sink current for fast synchronous rectifier control. |
| 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 at VILIM/10 (e.g., 100kΩ → 50mV threshold). |
| FBS | Remote feedback sense (VOUT) | Connects directly to CPU VCC pin; closes integrator loop to correct for supply rail IR drop. |
| GNDS | Remote ground sense | Connects directly to CPU ground pin; compensates for ground plane voltage offset in high-current paths. |
| FB | Local feedback input | Connected to bulk output capacitors; provides primary regulation signal before remote-sense correction. |
| REF | 2.0V precision reference output | Stable 2.0V ±0.02V reference; sources up to 50µA for external bias or DAC reference. |
| CC | Integrator capacitor connection | External 470pF capacitor sets compensation time constant for loop stability with ceramic output caps. |
| D0–D4 | 5-bit DAC code inputs | MSB-aligned digital inputs (5µA internal pull-up); define output voltage per Table 2 in datasheet. |
| 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 noise and EMI. |
| PGOOD | Open-drain power-good indicator | Asserts after soft-start (1.7ms) when VOUT is within ±8.5% of target; 10mV hysteresis ensures clean sequencing. |
| VCC / VDD | Analog & gate-drive supplies | Separate 4.5V–5.5V inputs: VCC powers PWM core, VDD drives DL; enables efficient use of system +5V rail. |
| PGND / GND | Power & analog grounds | Split grounds isolate high di/dt switching currents (PGND) from sensitive analog references (GND). |
Key Features
| Feature | Design Value |
|---|---|
| No current-sense resistor | Eliminates I²R loss and layout sensitivity by using output capacitor ESR for current sensing - improves efficiency and simplifies BOM. |
| Dual remote sensing (FB/FBS + GNDS) | Compensates for voltage drops in both power and ground paths, enabling ±1% regulation at CPU die under 7A dynamic loads. |
| 5-bit DAC with 25mV resolution | Enables fine-grained, software-controlled VOUT adjustment from 0.925V to 2.0V - meets Mobile Pentium II® VID requirements. |
| Fixed 2.25V overvoltage protection | Guarantees deterministic shutdown at exactly 2.25V without external components - critical for CPU safety in digital voltage scaling. |
| 1.7ms digital soft-start | Prevents inrush current and output overshoot during power-up; ramp time is internally controlled and independent of external RC. |
| Quick-PWM™ 100ns transient response | Delivers sub-microsecond recovery from 0A→7A load steps - maintains CPU voltage within spec during clock throttling events. |
Applications
| Notebook CPU Core Power | Docking Station VCORE Supply |
|---|---|
Use Scenario: Powers Intel Mobile Pentium II® CPU core in ultraportable notebooks with battery-only operation. IC Role / Device Role / Timing Role: Primary step-down controller managing 0–7A dynamic load, regulating VOUT via 5-bit DAC and remote sensing. Use Value: Enables single-stage BATT→VCORE conversion at >90% efficiency while maintaining ±1% accuracy under rapid load transients. |
Use Scenario: Supplies CPU core rail in docking stations using +5V system bus instead of battery. IC Role / Device Role / Timing Role: Two-stage buck controller operating at 550kHz to minimize inductor size and meet tight board area constraints. Use Value: Achieves smallest possible solution size with 2µH inductor and 4×470µF OS-CON output caps while sustaining 7A continuous output. |
| Single-Stage Battery Converter | Two-Stage System-Rail Converter |
Use Scenario: Directly converts 12V–24V Li-ion battery packs to sub-2V CPU core voltage in ruggedized industrial notebooks. IC Role / Device Role / Timing Role: High-input-voltage buck controller leveraging 28V absolute max rating and robust DH/DL drivers. Use Value: Delivers highest possible efficiency (>92% at 7A) by eliminating intermediate +5V conversion stage and associated losses. |
Use Scenario: Generates VCORE from stable +5V system rail in enterprise-class laptops with AC adapter priority. IC Role / Device Role / Timing Role: Precision-adjustable controller using REF and DAC to track dynamic VID commands from CPU. Use Value: Supports real-time voltage scaling (e.g., 1.6V→1.3V) with 25mV granularity and <100ns response to maintain CPU performance and thermal headroom. |
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 designs without dynamic VID changes; lacks 25mV resolution and fixed 2.25V OVP | Select MAX1710EEG only if output voltage is static and OVP threshold must scale with VOUT. |
| MAX1712EEG | 5-bit DAC, 1.1V–1.85V output range, different DAC code mapping vs. MAX1711 | Optimized for lower-voltage CPUs (e.g., later Pentium III variants); narrower range excludes 0.925V and 2.0V endpoints | Choose MAX1712EEG when targeting 1.1V–1.85V VCORE with identical 5-bit interface and protection thresholds. |
Compared with MAX1710EEG and MAX1712EEG, the MAX1711EEG uniquely combines full 0.925V–2.0V coverage, fixed 2.25V OVP for CPU safety, and 5-bit resolution - making it the preferred choice for Mobile Pentium II® designs requiring dynamic voltage scaling and deterministic fault response.
Availability
MAX1711EEG is available at Aetrix Electronics and suitable for notebook computer power supplies, docking station VCORE converters, and single-stage battery-to-core DC-DC applications requiring stable component supply and long-term lifecycle support.
Supply support for MAX1711EEG 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 markets.
The MAX1710/MAX1711/MAX1712 product line was engineered specifically for notebook CPU core power delivery - emphasizing ultra-fast transient response, digital voltage programmability, and integrated protection for mobile processors.
FAQ
What is the output voltage range supported by the MAX1711EEG?
The MAX1711EEG supports a digitally adjustable output voltage range from 0.925V to 2.0V in 25mV increments, defined by its 5-bit DAC inputs (D0–D4). This range complies with Mobile Pentium II® CPU VID specifications and is confirmed in Table 2 of the official datasheet. The MAX1711EEG does not support voltages outside this range - attempting to program codes beyond the defined table results in either 0.925V or 2.0V clamping or shutdown behavior.
Does the MAX1711EEG require an external current-sense resistor?
No, the MAX1711EEG eliminates the need for an external current-sense resistor by using the output capacitor's ESR as the current-sensing element - a technique enabled by its Quick-PWM™ architecture. This lossless current-limit implementation reduces power loss, simplifies PCB layout, and avoids tolerance drift issues associated with discrete resistors. The MAX1711EEG uses ILIM pin voltage scaling (VILIM/10) to set the current-limit threshold.
How does the MAX1711EEG achieve 100ns load-step response?
The MAX1711EEG achieves 100ns load-step response through its proprietary Quick-PWM™ control architecture - a constant-on-time, voltage-feed-forward scheme that bypasses traditional error-amplifier latency. When a load step occurs, the integrator-based feedback loop reacts within 100ns by adjusting DH on-time based on real-time VOUT and VIN measurements. This is measured and guaranteed under conditions specified in the Electrical Characteristics table (VBATT = 15V, VCC = VDD = 5V, TA = 0°C to +85°C).
What is the purpose of the FBS and GNDS pins on the MAX1711EEG?
The FBS (Feedback Sense) and GNDS (Ground Sense) pins on the MAX1711EEG enable true 4-wire remote sensing: FBS connects directly to the CPU VCORE pin to compensate for supply rail IR drop, while GNDS connects to the CPU ground pin to correct for ground plane offset. Together, they close separate integrator loops that actively nullify voltage errors caused by PCB trace resistance - ensuring ±1% regulation accuracy at the load, not just at the converter output terminals.
Can the MAX1711EEG operate with only a battery input, or does it require a +5V bias supply?
The MAX1711EEG requires an external +5V bias supply on both VCC (for PWM core) and VDD (for DL gate driver) in addition to the battery input (V+). It cannot operate from battery alone. This +5V supply is typically derived from the notebook's efficient 5V system rail. If only battery power is available, a separate +5V regulator (e.g., MAX1615) must be added - as explicitly stated in the "+5V Bias Supply" section of the datasheet.
MAX1711EEG Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- Quick-PWM™
- Package/Case:
- 24-SSOP (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Applications:
- PWM Controller, CPU core
- Voltage - Input:
- 4.5V ~ 5.5V
- Number of Outputs:
- 1
- Voltage - Output:
- 0.925V ~ 2V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 24-QSOP
MAX1711EEG FAQ
1.How can I place an order for MAX1711EEG through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX1711EEG 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 reliable?
The price and inventory of MAX1711EEG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1711EEG is usually 5 days.
3.What payment methods are accepted for MAX1711EEG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1711EEG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX1711EEG?
MAX1711EEG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX1711EEG 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?
For technical support, including MAX1711EEG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1711EEG requirements.
6.How does Aetrix verify that MAX1711EEG is sourced from the original manufacturer or authorized distributors?
All MAX1711EEG 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 meets industry standards.
7.What is the process for return or replacement of MAX1711EEG?
All MAX1711EEG units undergo pre-shipment inspection (PSI). If there is an issue with MAX1711EEG, 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 part is unused and in its original packaging.
Return procedure for MAX1711EEG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX1711EEG Tags
-
TPS51206DSQR
Texas Instruments
-
TPS51200DRCR
Texas Instruments
-
TPS51200DRCT
Texas Instruments
-
TPS62740DSSR
Texas Instruments
-
TPS51100DGQR
Texas Instruments
-
NCP51200MNTXG
onsemi
-
NCP51400MNTXG
onsemi
-
RT9026GSP
Richtek USA Inc.
-
LP2998MRX/NOPB
Texas Instruments
-
TPS51200QDRCRQ1
Texas Instruments
-
DPA423GN-TL
Power Integrations
-
LM10011SD/NOPB
Texas Instruments
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
