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

Analog Devices Inc./Maxim Integrated MAX1519ETL

Name: MAX1519ETL
Brand: Analog Devices Inc./Maxim Integrated
SKU: MAX1519ETL
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: MAX1519ETL

Manufacturer:: Analog Devices Inc./Maxim Integrated

Category:: Special Purpose Regulators

Package:: 40-WFQFN Exposed Pad

Datasheet:: MAX1519ETL.pdf

Description:: DUAL-PHASE, QUICKPWM CONTROLLERS

Quantity:: RFQ Add To RFQ list

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Product details

Overview

The MAX1519ETL from Maxim Integrated is a dual-phase, Quick-PWM™ step-down controller designed for Pentium® 4 CPU core power supplies in notebook and desktop systems. It delivers ±0.75% output voltage accuracy at 1.3V, supports 4V–28V battery input, and features active voltage positioning with adjustable gain/offset. It enables high-efficiency single-stage battery-to-core conversion or compact two-stage 5V-system conversion.

For engineers reviewing the MAX1519ETL datasheet, MAX1519ETL pinout, MAX1519ETL application, or MAX1519ETL equivalent, key selection criteria include its 40-pin thin QFN package, selectable 100–550kHz switching frequency, dual-phase current balancing, suspend-mode DAC (S0–S1), and integrated overvoltage/undervoltage/thermal protection - all critical for CPU VRM design compliance with Intel P4 specifications.

Technical Context

The MAX1519ETL implements a dual-phase Quick-PWM control architecture with independent on-time one-shot generation per phase (controlled by TON pin), synchronized interleaved operation, and real-time current balancing via differential sensing (CMP/CMN, CSP/CSN). Its voltage-positioning amplifier accepts OFS and GNDS inputs to dynamically adjust output setpoint based on load current, reducing bulk capacitance requirements.

It integrates four-level logic decoding for TON/S0/S1, three-level logic for SUS/SKIP, and a 5-bit VID DAC (D0–D4) for programmable output voltage (0.60V–1.75V mobile range). Fault management includes blanked VROK assertion, 24-cycle fault-blanking after DAC transitions, and soft-shutdown with controlled output ramp-down.

Key Specifications

Parameter	Value and Actual Design Meaning
Topology	Dual-phase synchronous buck controller - enables interleaved operation to halve input ripple and reduce output capacitor count.
Input Voltage Range	4V to 28V battery input - supports direct high-voltage battery stepping for maximum efficiency in notebooks.
Output Accuracy	±0.75% at 1.3V over line/load/temperature - ensures tight regulation for sensitive P4 core voltage requirements.
Switching Frequency	Selectable 100/200/300/550kHz via TON pin - allows trade-off between size (higher fSW) and efficiency (lower fSW).
Voltage Positioning	Adjustable gain (−0.125 V/V) and offset (GNDS input) - actively lowers output under load to minimize I²R losses and thermal stress.
Fault Protection	UVP (70% nominal), OVP (MAX1545 only), thermal shutdown (160°C), VROK with 3–7ms startup delay - ensures robust CPU supply integrity.
Package	40-pin thin QFN, 6mm × 6mm - surface-mount, low-profile package optimized for high-density VRM layouts.

Pinout & Package

MAX1519ETL is housed in a 40-pin, 6mm × 6mm thin QFN package with exposed thermal pad (PGND-connected). Pin 1 is marked by dot; top-side marking includes "MAX1519" and date code.

Pin/Terminal	Circuit Role	Design Meaning
1 TIME	Slew-rate clock input	Resistor-to-GND sets internal slew-rate clock (100–1000kHz); determines soft-start/soft-shutdown ramp rate and fault blanking timing.
2 TON	On-time selection control	Four-level input (GND/REF/open/VCC) selects K-factor to set DH_ on-time and nominal switching frequency (550/300/200/100kHz).
3 SUS	Suspend mode enable	Three-level input triggering transition to suspend voltage; blanks VROK and initiates DAC reconfiguration using S0–S1.
4–5 S0, S1	Suspend voltage select	Four-level digital inputs selecting 0.675V–1.45V suspend output via internal multiplexer when SUS is asserted.
6 SHDN	Shutdown control	Active-low input; pulls DLM/DLS to VDD in shutdown to clamp output; 12–15V disables protections for debug mode.
7 OFS	Offset voltage input	0–2V input enabling programmable output offset: subtracts 0.125×VOFS (0–0.8V) or adds 0.125×(VREF−VOFS) (1.2–2V).
8 REF	2.000V reference output	Stable 2V reference (±10mV load regulation) for external biasing and DAC reference; requires ≥0.22µF ceramic bypass.
9 ILIM	Current-limit threshold adjust	0.2–1.5V input setting positive current limit as VILIM/20; default 30mV when tied to VCC.
10–14 D0–D4	VID DAC code inputs	5-bit parallel interface selecting 0.60V–1.75V output voltage in mobile mode; decoded internally for FB regulation.
15 VROK	Power-good output	Open-drain output asserting high when FB is within ±10% of DAC-set voltage; 0.4V max low-level at 3mA sink.
16–19 DHM, DLM, DHS, DLS	High-/low-side gate drivers	Phase-specific drivers with R_ON(DH) ≤4.5Ω, R_ON(DL) ≤2Ω; support large synchronous MOSFETs.
20–23 CMP, CMN, CSP, CSN	Current-sense differential inputs	Two independent pairs for per-phase current monitoring; enable precise current balancing and overcurrent detection.
24–25 FB, GNDS	Feedback and ground sense	FB compares output to DAC setpoint; GNDS provides ground-referenced current-sense offset for voltage positioning.
26–29 V+, VCC, VDD, GND	Power rails	V+ = main battery input (4–28V); VCC/VDD = 4.5–5.5V bias supplies; GND = analog ground reference.
30–39 BSTS, LXS, BSTM, LXM, CCV, CCI, OAIN+, OAIN−, VDD, VCC	Bootstrap, compensation, op-amp I/O	BSTx/LXx drive external high-side FETs; CCV/CCI set compensation; OAIN+/OAIN− interface voltage-positioning amplifier.
40 PGND	Power ground	High-current return path for switch node and gate drivers; isolated from AGND to minimize noise coupling.

Key Features

Feature	Design Value
Dual-phase Quick-PWM control	Interleaved operation reduces input RMS ripple by ~70% and eases EMI filtering vs. single-phase designs.
Active voltage positioning	Dynamic output droop proportional to load current minimizes required bulk capacitance and improves transient response.
5-bit on-board DAC + suspend DAC	Independent 5-bit VID (D0–D4) and 2-bit suspend (S0–S1) allow seamless transition between performance and low-power states.
Programmable slew-rate and on-time	TIME and TON pins enable full customization of soft-start time, shutdown ramp, and switching frequency without external components.
Integrated fault protection suite	UVP, thermal shutdown, and VROK with blanking ensure safe CPU power delivery during transients and faults.
High-current gate drivers	DH/DL drivers deliver >1.6A source/sink capability, supporting low-R_DS(on) MOSFETs for >50A total output current.

Applications

Mobile Notebook CPU Core Supply	Desktop P4 VRM System
Use Scenario: Direct battery-to-core conversion in ultra-thin notebooks with limited board area and thermal headroom. IC Role / Device Role / Timing Role: Dual-phase buck controller managing two synchronous phases with interleaved timing to reduce input ripple and improve efficiency. Use Value: Enables single-stage 12–20V battery stepping to 0.8–1.5V core voltage at >90% peak efficiency, minimizing heat and extending battery life.	Use Scenario: High-current, low-noise CPU power delivery in ATX desktop motherboards compliant with Intel P4 VRM specs. IC Role / Device Role / Timing Role: Primary VRM controller implementing active voltage positioning and precise VID decoding for dynamic CPU voltage scaling. Use Value: Delivers ±0.75% output accuracy and <20μs load-step response, ensuring stable operation during rapid P4 frequency transitions.
Voltage-Positioned Server VRM	Low-Voltage Programmable Power Supply
Use Scenario: High-density server blade power modules requiring tight regulation and thermal-aware output droop. IC Role / Device Role / Timing Role: Dual-phase controller with GNDS-based current-sense feedback enabling real-time voltage positioning across varying load currents. Use Value: Reduces required output capacitance by up to 40% while maintaining <±1% load regulation, lowering BOM cost and footprint.	Use Scenario: Configurable lab or embedded power supply where output voltage must be digitally programmed and fine-tuned. IC Role / Device Role / Timing Role: Programmable buck controller with 5-bit DAC, OFS offset adjustment, and suspend-mode voltage selection. Use Value: Supports 0.60V–1.75V output range with 10mV resolution via D0–D4, plus ±15mV offset tuning via OFS for calibration-critical applications.

Mobile Notebook CPU Core Supply

Desktop P4 VRM System

Use Scenario: Direct battery-to-core conversion in ultra-thin notebooks with limited board area and thermal headroom.

IC Role / Device Role / Timing Role: Dual-phase buck controller managing two synchronous phases with interleaved timing to reduce input ripple and improve efficiency.

Use Value: Enables single-stage 12–20V battery stepping to 0.8–1.5V core voltage at >90% peak efficiency, minimizing heat and extending battery life.

Use Scenario: High-current, low-noise CPU power delivery in ATX desktop motherboards compliant with Intel P4 VRM specs.

IC Role / Device Role / Timing Role: Primary VRM controller implementing active voltage positioning and precise VID decoding for dynamic CPU voltage scaling.

Use Value: Delivers ±0.75% output accuracy and <20μs load-step response, ensuring stable operation during rapid P4 frequency transitions.

Voltage-Positioned Server VRM

Low-Voltage Programmable Power Supply

Use Scenario: High-density server blade power modules requiring tight regulation and thermal-aware output droop.

IC Role / Device Role / Timing Role: Dual-phase controller with GNDS-based current-sense feedback enabling real-time voltage positioning across varying load currents.

Use Value: Reduces required output capacitance by up to 40% while maintaining <±1% load regulation, lowering BOM cost and footprint.

Use Scenario: Configurable lab or embedded power supply where output voltage must be digitally programmed and fine-tuned.

IC Role / Device Role / Timing Role: Programmable buck controller with 5-bit DAC, OFS offset adjustment, and suspend-mode voltage selection.

Use Value: Supports 0.60V–1.75V output range with 10mV resolution via D0–D4, plus ±15mV offset tuning via OFS for calibration-critical applications.

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-phase buck controller applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
MAX1545ETL	Pin-compatible variant with integrated output overvoltage protection (OVP); MAX1519ETL lacks OVP circuitry.	Required in systems mandating hardware OVP for safety-critical CPU supplies; not needed where OVP is handled externally.	Select MAX1545ETL when OVP is required; otherwise MAX1519ETL offers identical control functionality at lower cost.
MAX1544ETL	Pin-compatible controller for AMD Athlon™/Duron™ platforms; different VID code mapping and suspend logic behavior.	Designed for AMD CPU voltage sequencing; incompatible with Intel P4 VID tables and suspend timing requirements.	Use only for AMD-based designs; not a functional substitute for MAX1519ETL in Intel P4 systems.

Compared with MAX1545ETL, the MAX1519ETL omits OVP but matches all other control features, making it suitable for cost-sensitive Intel P4 designs where OVP is redundant. Against MAX1544ETL, it is functionally incompatible due to platform-specific VID encoding and sequencing logic.

Availability

MAX1519ETL is available at Aetrix Electronics and suitable for mobile notebook CPU core supplies, desktop P4 VRMs, and voltage-positioned server power modules requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for MAX1519ETL 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 MAX1519ETL belongs to Maxim's CPU core power controller product line, engineered specifically for Intel Pentium 4 VRM compliance with emphasis on Quick-PWM responsiveness, voltage positioning, and multi-phase efficiency.

FAQ

What is the operating temperature range for the MAX1519ETL?

The MAX1519ETL is rated for continuous operation from −40°C to +100°C ambient temperature, with junction temperature limited to +150°C. This extended range supports deployment in thermally demanding notebook and desktop VRM environments where airflow is constrained and power density is high. The device incorporates thermal shutdown at 160°C with 10°C hysteresis to protect against sustained overload conditions.

Does the MAX1519ETL support both single-phase and dual-phase operation?

Yes, the MAX1519ETL supports both modes via the SKIP pin: connecting SKIP to VCC enables dual-phase PWM operation, while tying SKIP to GND forces single-phase pulse-skipping mode. This flexibility allows designers to optimize for efficiency at light loads (single-phase skip) or ripple reduction and thermal distribution at heavy loads (dual-phase PWM), all without changing PCB layout.

How does the MAX1519ETL implement active voltage positioning?

The MAX1519ETL implements active voltage positioning using its internal voltage-positioning amplifier, which accepts GNDS (ground-sense) and OFS (offset) inputs. GNDS measures load current via a sense resistor, and the amplifier applies a programmable gain (0.94–1.01 V/V) to generate a proportional offset that lowers the output voltage under load - reducing I²R losses and allowing smaller output capacitors while maintaining regulation accuracy.

What is the purpose of the TIME pin on the MAX1519ETL?

The TIME pin on the MAX1519ETL sets the internal slew-rate clock frequency by connecting an external resistor to GND. This clock governs soft-start ramp time, soft-shutdown ramp rate, and fault-blanking duration (24 clock cycles after DAC transitions). A 15kΩ resistor yields ~1MHz clock (fastest ramp), while 150kΩ yields ~100kHz (slowest ramp), enabling precise control of inrush current and fault recovery timing.

Can the MAX1519ETL be used with AMD CPU platforms?

No, the MAX1519ETL is specifically designed for Intel Pentium 4 CPU core supplies and implements Intel's VID code table, suspend timing, and VRM specification compliance. For AMD platforms such as Athlon™ or Duron™, Maxim offers the pin-compatible MAX1544ETL, which uses different VID mapping and sequencing logic - substituting MAX1519ETL in AMD designs will result in incorrect voltage programming and potential system instability.

MAX1519ETL Specifications

Product attributes: Attribute value

Manufacturer:: Analog Devices Inc./Maxim Integrated

Series:: -

Package/Case:: 40-WFQFN Exposed Pad

Packaging:: Bulk

Product Status:: Active

Applications:: PWM Controller, CPU core

Voltage - Input:: 4V ~ 28V

Number of Outputs:: 1

Voltage - Output:: Programmable

Operating Temperature:: -40°C ~ 100°C

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 40-TQFN-EP (6x6)

MAX1519ETL FAQ

1.How can I place an order for MAX1519ETL through Aetrix?

Please submit a Request for Quotation (RFQ) for MAX1519ETL 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 MAX1519ETL reliable?

The price and inventory of MAX1519ETL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1519ETL is usually 5 days.

3.What payment methods are accepted for MAX1519ETL?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1519ETL transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MAX1519ETL?

MAX1519ETL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MAX1519ETL 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 MAX1519ETL?

For technical support, including MAX1519ETL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1519ETL requirements.

6.How does Aetrix verify that MAX1519ETL is sourced from the original manufacturer or authorized distributors?

All MAX1519ETL 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 MAX1519ETL meets industry standards.

7.What is the process for return or replacement of MAX1519ETL?

All MAX1519ETL units undergo pre-shipment inspection (PSI). If there is an issue with MAX1519ETL, 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 MAX1519ETL part is unused and in its original packaging.

Return procedure for MAX1519ETL:

1.Submit a request within 90 days.

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

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