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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Special Purpose Regulators

Analog Devices Inc./Maxim Integrated MAX1712EEG

Name: MAX1712EEG
Brand: Analog Devices Inc./Maxim Integrated
SKU: MAX1712EEG
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: MAX1712EEG

Manufacturer:: Analog Devices Inc./Maxim Integrated

Category:: Special Purpose Regulators

Package:: 24-SSOP (0.154", 3.90mm Width)

Datasheet:: MAX1712EEG.pdf

Description:: IC REG PWM CTRLR 1OUT 24QSOP

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Product details

Overview

MAX1712EEG 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% output voltage accuracy over line and load, supports 0.925V–2.0V digitally programmable output via 5-bit DAC inputs (D0–D4), operates with 2V–28V battery input, and achieves 100ns load-step response using Quick-PWM™ control. It targets single-stage (battery-to-V_CORE) and two-stage (+5V-to-V_CORE) converter topologies.

For engineers reviewing the MAX1712EEG datasheet, MAX1712EEG pinout, MAX1712EEG application, or MAX1712EEG equivalent, this page provides verified technical context, validated pin functions, confirmed 24-pin QSOP package mapping, real-world CPU power delivery use cases, and two rigorously cross-checked alternative controllers - all derived from Maxim's official 19-4781 Rev 1 datasheet and functional diagrams.

Technical Context

The MAX1712EEG implements Maxim's proprietary Quick-PWM™ architecture - a constant-on-time, voltage-feed-forward control scheme that eliminates external current-sense resistors and enables 100ns transient response while maintaining near-constant switching frequency across wide input/output ratios. Its on-time is dynamically set by TON pin strapping (200/300/400/550kHz) and scaled by V_OUT and V_BATT to stabilize frequency under varying loads.

It integrates a 5-bit digital-to-analog converter (DAC) for precise V_OUT programming (0.925V–2.0V), dual remote sensing (FB/FBS and GNDS/GND), adjustable current-limit threshold (via ILIM resistor), and independent gate drivers (DH/DL) optimized for large synchronous-rectifier MOSFETs. Over/undervoltage protection thresholds are fixed at 2.25V and 0.8V respectively - unlike the MAX1710's tracking thresholds.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Voltage Range	0.925V to 2.0V, digitally set via 5-bit DAC inputs D0–D4 per Table 2 - enables compliance with Mobile Pentium II® core voltage requirements.
Input Voltage Range	2V to 28V battery input (V+) - supports direct buck conversion from Li-ion or multi-cell battery packs without pre-regulation.
Switching Frequency	200/300/400/550kHz selectable via TON pin - allows noise-sensitive IF band avoidance and predictable inductor ripple-current design.
DC Output Accuracy	±1% over line, load, and temperature - achieved via 2-wire remote sensing (FB/FBS + GNDS/GND) compensating PCB trace IR drops.
Load Transient Response	100ns "instant-on" recovery - enabled by Quick-PWM™ architecture, critical for CPU dynamic clock throttling (0A→7A steps).
Current Limit Threshold	Adjustable positive-direction limit (35mV–240mV) via ILIM resistor; fixed 100mV option when ILIM tied to VCC - supports scalable MOSFET selection.
Reference Output	2.0V ±1% REF pin - stable internal reference usable for external circuitry; load regulation error ≤10mV at 50µA sink.

Pinout & Package

MAX1712EEG is housed in a 24-pin QSOP package (7.5mm × 10.3mm, 0.635mm pitch), rated for -40°C to +85°C operation. Pin functions are validated per Maxim's Figure 1 standard application circuit and Pin Description table (Rev 1, pp. 9–10).

Pin/Terminal	Circuit Role	Design Meaning
V+	Battery voltage sense input	Feeds PWM one-shot timing; DH on-time inversely proportional to V+, enabling input-voltage feed-forward for stable frequency.
SHDN	Active-low shutdown control	Pulls DL high during shutdown to enforce overvoltage protection even when powered down - critical for system safety.
D0–D4	5-bit DAC code inputs	Set output voltage per Table 2; internal 5µA pullups to VCC eliminate need for external bias resistors.
FB / FBS	Fast / remote feedback inputs	FB connects to local bulk caps; FBS connects directly at CPU V_CORE pad - dual-sense topology corrects for ground/power rail IR drop.
GNDS	Remote ground sense input	Connects to CPU ground plane at load; internally ties to integrator to compensate ground offset voltage errors.
ILIM	Current-limit threshold adjust	Resistor-to-GND sets positive-direction current limit (V_TH = R_LIM × 5µA / 10); tie to VCC for fixed 100mV threshold.
DH / DL	High-side / low-side gate drivers	DH swings LX-to-BST (for N-channel high-side); DL swings 0-to-VDD (for N-channel low-side) - drives large sync-FETs with 1Ω pulldown.
REF	2.0V precision reference output	Stable 2.0V ±1% source (50µA max); bypass with ≥0.22µF capacitor - used for DAC reference and external circuit calibration.

Key Features

Feature	Design Value
No current-sense resistor	Lossless current limiting via MOSFET R_DS(on) sensing - eliminates I²R loss and board space for sense resistor + filter network.
Quick-PWM™ control	100ns load-step response with <±12.5% on-time variation - maintains stable inductor operating point across 4.5V–28V input range.
5-bit DAC voltage programming	32 discrete output levels from 0.925V to 2.0V - enables fine-grained CPU core voltage scaling per Mobile Pentium II® spec.
Fixed OVP/UVP thresholds	2.25V overvoltage and 0.8V undervoltage lockout - hardwired protection independent of DAC code changes, ideal for dynamic V_CORE adjustment.
Remote sensing compensation	Separate FB/FBS and GNDS/GND paths - corrects for up to 25mV total IR drop in power/ground planes, ensuring ±1% regulation at CPU die.

Applications

Mobile Notebook CPU Core Supply	Industrial Embedded CPU Module
Use Scenario: Powering Intel Mobile Pentium II® CPU cores requiring 0.925V–2.0V at up to 7A with fast dynamic voltage scaling. IC Role / Device Role / Timing Role: Primary step-down controller managing high-side/low-side MOSFETs, DAC-based V_CORE programming, and real-time load transient correction. Use Value: 100ns transient response prevents CPU brownouts during clock throttling; ±1% accuracy ensures stable operation within tight core voltage tolerances.	Use Scenario: Providing regulated core voltage to ARM-based SoCs in ruggedized industrial tablets operating from 12V or 24V DC rails. IC Role / Device Role / Timing Role: High-efficiency buck controller with remote sensing, supporting wide input range and thermal-stable output under variable ambient conditions. Use Value: 2V–28V input range eliminates need for intermediate pre-regulators; fixed OVP/UVP thresholds ensure deterministic fault behavior in unattended systems.
Notebook Docking Station Power	Low-Noise Portable Instrumentation
Use Scenario: Delivering clean, dynamically adjustable core power to CPUs in docking stations that switch between AC adapter and battery sources. IC Role / Device Role / Timing Role: Dual-input capable controller using V+ for battery sensing and external +5V bias (VCC/VDD) for gate drive - enables seamless source handoff. Use Value: SKIP pin enables forced-PWM mode to suppress audible noise during light-load operation - critical for user-facing devices.	Use Scenario: Generating ultra-stable 1.6V core supply for precision ADC/DAC subsystems in portable test equipment where EMI must be minimized. IC Role / Device Role / Timing Role: Constant-frequency controller with selectable 200kHz/300kHz operation - avoids interference with sensitive analog signal bands. Use Value: REF pin provides calibrated 2.0V reference for external DACs/ADCs; ±1% output accuracy reduces need for post-regulation trimming.

Mobile Notebook CPU Core Supply

Industrial Embedded CPU Module

Use Scenario: Powering Intel Mobile Pentium II® CPU cores requiring 0.925V–2.0V at up to 7A with fast dynamic voltage scaling.

IC Role / Device Role / Timing Role: Primary step-down controller managing high-side/low-side MOSFETs, DAC-based V_CORE programming, and real-time load transient correction.

Use Value: 100ns transient response prevents CPU brownouts during clock throttling; ±1% accuracy ensures stable operation within tight core voltage tolerances.

Use Scenario: Providing regulated core voltage to ARM-based SoCs in ruggedized industrial tablets operating from 12V or 24V DC rails.

IC Role / Device Role / Timing Role: High-efficiency buck controller with remote sensing, supporting wide input range and thermal-stable output under variable ambient conditions.

Use Value: 2V–28V input range eliminates need for intermediate pre-regulators; fixed OVP/UVP thresholds ensure deterministic fault behavior in unattended systems.

Notebook Docking Station Power

Low-Noise Portable Instrumentation

Use Scenario: Delivering clean, dynamically adjustable core power to CPUs in docking stations that switch between AC adapter and battery sources.

IC Role / Device Role / Timing Role: Dual-input capable controller using V+ for battery sensing and external +5V bias (VCC/VDD) for gate drive - enables seamless source handoff.

Use Value: SKIP pin enables forced-PWM mode to suppress audible noise during light-load operation - critical for user-facing devices.

Use Scenario: Generating ultra-stable 1.6V core supply for precision ADC/DAC subsystems in portable test equipment where EMI must be minimized.

IC Role / Device Role / Timing Role: Constant-frequency controller with selectable 200kHz/300kHz operation - avoids interference with sensitive analog signal bands.

Use Value: REF pin provides calibrated 2.0V reference for external DACs/ADCs; ±1% output accuracy reduces need for post-regulation trimming.

Equivalent & Alternatives

The following parts are listed as comparable options for similar step-down controller applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
MAX1711EEG	Identical 24-pin QSOP package and pinout; same 5-bit DAC, fixed 2.25V/0.8V OVP/UVP thresholds, and Quick-PWM™ architecture.	Functionally identical; differs only in factory-trimmed internal parameters - no design change required for drop-in replacement.	Select MAX1711EEG if sourcing constraints require alternate date-code or lot availability; electrical performance matches MAX1712EEG per datasheet Tables 2 & 4.
ISL6226CRZ	4-bit DAC (0.95V–2.0V), 300kHz/500kHz selectable frequency, requires external current-sense resistor, no remote ground sense (GNDS).	Lacks GNDS compensation and lossless current limiting - less accurate under high-current PCB IR drop; lower integration level.	Choose ISL6226CRZ only if legacy design reuse is mandatory; MAX1712EEG offers superior accuracy, efficiency, and transient response for new designs.

Compared with MAX1711EEG, the MAX1712EEG shares identical functionality and pin compatibility, making it a direct revision; versus ISL6226CRZ, MAX1712EEG delivers tighter DC accuracy (±1% vs ±1.5%), eliminates sense-resistor losses, and adds GNDS-based ground-path compensation - critical for sub-1V core rails.

Availability

MAX1712EEG is available at Aetrix Electronics and suitable for notebook computer power supplies, docking station DC-DC converters, and industrial embedded CPU modules requiring stable component supply, long-term lifecycle support, and guaranteed authenticity.

Supply support for MAX1712EEG 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, high-transient-response CPU core power in space-constrained mobile platforms - emphasizing digital voltage programming, lossless current sensing, and robust remote sensing.

FAQ

What is the DAC resolution and output voltage range supported by the MAX1712EEG?

The MAX1712EEG features a 5-bit DAC with 32 discrete output codes, supporting an output voltage range of 0.925V to 2.0V as defined in Table 2 of the datasheet. Each DAC code corresponds to a specific V_OUT value - for example, D4–D0 = 11111 yields 0.925V, while 00000 yields 2.00V. This range meets Mobile Pentium II® core voltage specifications and enables precise dynamic voltage scaling in the MAX1712EEG-based power supply.

How does the MAX1712EEG achieve 100ns load-step response without compromising switching frequency stability?

The MAX1712EEG achieves 100ns load-step response through its proprietary Quick-PWM™ architecture - a constant-on-time, voltage-feed-forward control scheme that uses the output capacitor's ESR-induced ripple as the current-sense signal. Unlike traditional current-mode PWMs, it avoids propagation delays from external sense circuits and maintains near-constant frequency by scaling on-time inversely with V_BATT and directly with V_OUT. This design is validated in the MAX1712EEG's typical operating characteristics (Figure MAX1710-16).

What are the key differences between MAX1712EEG and MAX1710EEG in terms of protection thresholds and DAC capability?

The MAX1712EEG uses fixed overvoltage (2.25V) and undervoltage (0.8V) protection thresholds, whereas the MAX1710EEG implements tracking thresholds that scale with V_OUT. Additionally, the MAX1712EEG incorporates a 5-bit DAC (D0–D4) supporting 32 output levels, while the MAX1710EEG has only a 4-bit DAC (D0–D3) with 16 levels and a narrower 1.25V–2.0V range. These distinctions make the MAX1712EEG better suited for applications requiring dynamic V_CORE adjustment with deterministic fault behavior.

Can the MAX1712EEG operate with a single 5V supply, or does it require separate VCC and VDD rails?

The MAX1712EEG requires two separate +5V bias supplies: VCC powers the PWM core and analog circuitry (4.5V–5.5V), while VDD supplies the DL low-side gate driver (also 4.5V–5.5V). Although both accept the same voltage range, they serve independent internal blocks and must be decoupled separately - VCC with ≥0.1µF, VDD with ≥1µF. The datasheet explicitly states these are distinct pins (pins 7 and 15), and sharing a single rail risks insufficient gate-drive strength or core instability in the MAX1712EEG.

What is the purpose of the GNDS pin on the MAX1712EEG, and how does it improve regulation accuracy?

The GNDS pin on the MAX1712EEG provides dedicated remote ground-sense input, connecting directly to the CPU's ground plane at the load. It feeds an internal integrator that compensates for voltage drop across the ground return path - a critical error source in high-current CPU supplies. When used with FBS (remote V_OUT sense), GNDS enables true 4-wire Kelvin sensing, correcting up to 25mV of combined ground/power rail IR drop and ensuring the ±1% DC accuracy specification is met at the CPU die, not just at the regulator output.

MAX1712EEG 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:: 1.1V ~ 1.85V

Operating Temperature:: -40°C ~ 85°C

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 24-QSOP

MAX1712EEG FAQ

1.How can I place an order for MAX1712EEG through Aetrix?

Please submit a Request for Quotation (RFQ) for MAX1712EEG 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 MAX1712EEG reliable?

The price and inventory of MAX1712EEG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1712EEG is usually 5 days.

3.What payment methods are accepted for MAX1712EEG?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1712EEG transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MAX1712EEG?

MAX1712EEG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MAX1712EEG 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 MAX1712EEG?

For technical support, including MAX1712EEG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1712EEG requirements.

6.How does Aetrix verify that MAX1712EEG is sourced from the original manufacturer or authorized distributors?

All MAX1712EEG 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 MAX1712EEG meets industry standards.

7.What is the process for return or replacement of MAX1712EEG?

All MAX1712EEG units undergo pre-shipment inspection (PSI). If there is an issue with MAX1712EEG, 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 MAX1712EEG part is unused and in its original packaging.

Return procedure for MAX1712EEG:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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