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

Monolithic Power Systems Inc. MP2935DQK-LF-Z

Name: MP2935DQK-LF-Z
Brand: Monolithic Power Systems Inc.
SKU: MP2935DQK-LF-Z
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: MP2935DQK-LF-Z

Manufacturer:: Monolithic Power Systems Inc.

Category:: Special Purpose Regulators

Package:: 40-VFQFN Exposed Pad

Datasheet:: MP2935DQK-LF-Z.pdf

Description:: IC REG CTRLR VR12.5 1OUT 40QFN

Quantity:: RFQ Add To RFQ list

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Product details

Overview

MP2935DQK-LF-Z from Monolithic Power Systems is a VR12.5-compliant, 4-phase synchronous buck PWM controller with SVID interface, tri-state PWM outputs, programmable load-line resistance, and active current balancing-designed for high-performance Intel® processors requiring precise adaptive voltage positioning and dynamic phase shedding across PS0–PS3 power states.

For engineers reviewing the MP2935DQK-LF-Z datasheet, MP2935DQK-LF-Z pinout, MP2935DQK-LF-Z application, or MP2935DQK-LF-Z equivalent, key selection criteria include SVID timing compliance (setup/hold ≥7ns/14ns), 4-phase interleaved switching up to 660 kHz per phase, tri-state PWM logic-level drive capability, thermal throttling via VRHOT# output, and compatibility with MPS Intelli-Phase™ drivers using CSx current-sense inputs.

Technical Context

The MP2935 implements constant-frequency current-mode control with trailing-edge PWM and injected valley current sensing, enabling precise per-phase current balancing and fast transient response via FAST-PWM mode triggered by VCOMP slew rate. Its architecture integrates an 8-bit DAC (0V–3.04V), remote differential sense amplifier (VOSEN/GNDSEN), and programmable slope compensation via SLOPE pin current (0–800 µA).

Power state management is fully SVID-driven: PS0 enables full 4-phase PWM operation; PS1–PS3 dynamically shed phases to single-phase AAM (Advanced Asynchronous Mode) with diode emulation in PS2/PS3, where switching frequency varies with COMP ripple and CCM pin asserts low to enable discontinuous conduction mode on Intelli-Phase™ drivers.

Key Specifications

Parameter	Value and Actual Design Meaning
Phases	Configurable 1–4-phase operation; hardware-selectable via PWMx pin pull-up to VCC.
Switching Frequency	Up to 660 kHz per phase in PS0; variable in AAM mode (PS1–PS3) based on COMP ripple.
SVID Interface	Compliant with VR12.5; supports SetVID_Fast (10 mV/µs), SetVID_Slow (2.5 mV/µs), and PS0–PS3 state commands.
Output Voltage Range	Digitally programmable 0V–3.04V via 8-bit VID; ±0.5% accuracy at 1.50–3.04V nominal.
Current Sensing	Four independent CSx inputs + VCM buffered reference; IMON output proportional to total load current (I_MON = I_VCM/16).
Thermal Monitoring	Integrated temperature ADC (register 17h); VRHOT# open-drain output asserts low when TEMP pin exceeds programmed threshold.
Protection Features	Programmable OCP (via OCPSET/VCLAMP), reverse voltage detection (−300 mV VOSEN–GNDSEN), latch-off fault handling, and UVLO (4.1–4.45 V).

Pinout & Package

MP2935DQK-LF-Z is housed in a thermally enhanced 6 mm × 6 mm, 40-lead QFN package with exposed thermal pad (GND). The package supports high-power density VR12.5 designs with θ_JA = 32°C/W on a 4-layer PCB.

Pin/Terminal	Circuit Role	Design Meaning
15–18 (PWM1–PWM4)	Tri-state logic-level PWM outputs	Drive external MOSFET drivers; pulling any PWMx to VCC disables that phase; all four active in PS0.
21–24 (CS1–CS4)	Per-phase current sense inputs	Accept current-sense signals from Intelli-Phase™ drivers; float unused pins.
35 (VOSEN), 36 (GNDSEN)	Remote voltage sense pair	Enable Kelvin sensing at CPU die; reject PCB IR drop for ±8 mV accuracy at low VID.
10 (IMON)	Analog load current monitor	Sources current proportional to total output current; R_IMON sets gain for I_OUT register readback.
7 (VRHOT#), 14 (FAULT#), 6 (VRRDY)	Open-drain status outputs	Assert low for thermal throttle, fault condition, or regulator readiness; require external pull-up.
12 (FSET)	Oscillator frequency setting	Resistor-to-GND sets master clock; per-phase frequency = F_CLK/N (N = active phases).
38 (EN)	Chip enable input	Logic-high (>0.8 V) enables operation; internal 2 µA leakage ensures clean startup sequencing.

Key Features

Feature	Design Value
VR12.5 Compliance	Fully implements SVID protocol including PS0–PS3 state transitions, SetVID timing, and VR-ready signaling.
Dynamic Phase Shedding	Hardware-automated transition from 4-phase PWM (PS0) to single-phase AAM (PS1–PS3) without firmware intervention.
FAST-PWM Transient Response	Overrides phase clock during load steps to turn on all PWMs simultaneously, minimizing V_OUT droop.
Programmable Load-Line	Adjustable droop slope via IDROOP output and external resistor; maintains optimal V_OUT position under load transients.
Intelli-Phase™ Integration	Dedicated CSx, CCM, and PWM interfaces enable seamless current sensing, diode emulation, and phase synchronization with MPS drivers.

Applications

Desktop CPU Power Delivery

Laptop CPU VRM

Use Scenario: Primary voltage regulator for Intel Core i7/i9 desktop processors in ATX motherboards with multi-phase buck topology.

IC Role / Device Role / Timing Role: VR12.5-compliant PWM controller managing four interleaved buck stages, coordinating with SVID commands from CPU and providing VR_READY handshake.

Use Value: Enables adaptive voltage positioning with ±0.5% DC accuracy and FAST-PWM mode to limit V_OUT droop to <15 mV during 50 A/µs load steps.

Use Scenario: Compact, thermally constrained VRM for thin-and-light laptops using Intel Core i5 U-series processors.

IC Role / Device Role / Timing Role: Single-chip 4-phase controller supporting dynamic phase shedding (PS0→PS3) and AAM mode to maintain >90% efficiency at 1–5 A loads.

Use Value: Reduces light-load power loss by switching to diode-emulation CCM mode in PS2/PS3, cutting quiescent current by 40% vs fixed-frequency operation.

Workstation CPU VRM

Embedded Intel Xeon D Platform

Use Scenario: High-current VRM for dual-socket Intel Xeon W-series workstations requiring stable 1.0–1.8 V core supply at up to 200 A.

IC Role / Device Role / Timing Role: Master controller interfacing with four MPS MP86933 Intelli-Phase™ drivers, using CSx inputs for per-phase current balance and IMON for real-time I_OUT telemetry.

Use Value: Achieves <±2% inter-phase current mismatch across temperature via active analog current balancing, eliminating need for DCR thermal compensation.

Use Scenario: Long-lifecycle embedded platform using Intel Xeon D-2100 with strict thermal and reliability requirements.

IC Role / Device Role / Timing Role: VR12.5 controller with integrated VRHOT# and TEMP monitoring, feeding thermal data to BMC for fan speed control and graceful throttling.

Use Value: Provides direct die-temperature correlation via TEMP pin ADC (register 17h), enabling accurate thermal margining without external sensors.

Equivalent & Alternatives

The following parts are listed as comparable options for similar multi-phase VR12.5 controller applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
MP2965DQK-LF-Z	Successor device with enhanced SVID timing margins (setup/hold: 8 ns/16 ns), improved FAST-PWM latency, and extended junction temp range (−40°C to +125°C vs −10°C to +125°C).	Required for new designs targeting VR12.5.2 compliance and long-term supply continuity; supports same 40-pin QFN footprint.	Select MP2965 for new designs due to EOL status of MP2935 and tighter SVID timing specs.
ISL6367IRZ-T	6-phase Renesas controller with integrated gate drivers; lacks tri-state PWM outputs and VRHOT# thermal alert; uses SMBus instead of native SVID.	Suitable for legacy Intel platforms requiring 6-phase support but not VR12.5-specific features like PS3 state or AAM mode.	Use only if migrating from ISL6367-based designs; not drop-in compatible due to pinout, protocol, and feature differences.

Compared with MP2935DQK-LF-Z, MP2965DQK-LF-Z offers guaranteed VR12.5.2 timing compliance and broader temperature rating for industrial deployments, while ISL6367IRZ-T provides higher phase count but requires SMBus translation and lacks native VRHOT# thermal signaling-making MP2965 the recommended upgrade path.

Availability

MP2935DQK-LF-Z is available at Aetrix Electronics and suitable for desktop motherboard power delivery, laptop VRM design, and workstation CPU voltage regulation requiring stable component supply and legacy VR12.5 compliance.

Supply support for MP2935DQK-LF-Z 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

Monolithic Power Systems (MPS) is a fabless semiconductor company specializing in high-performance analog and power ICs, with over two decades of expertise in DC/DC conversion, motor control, and power management solutions.

The MP2935 belongs to MPS's VR12.x controller product line, engineered specifically for Intel processor voltage regulation with emphasis on SVID protocol fidelity, adaptive voltage positioning, and thermal-aware power state transitions.

FAQ

What does "END OF LIFE, REFER TO MP2965" mean for MP2935DQK-LF-Z?

MP2935DQK-LF-Z is officially discontinued by Monolithic Power Systems. New designs must use MP2965DQK-LF-Z, its pin-compatible successor with enhanced SVID timing, wider temperature range, and VR12.5.2 compliance. Aetrix Electronics maintains limited legacy stock for repair and maintenance of existing systems.

Can MP2935DQK-LF-Z operate with non-MPS Intelli-Phase™ drivers?

Yes-it supports standard gate drivers via tri-state PWM outputs, but full feature integration (e.g., current balancing, diode emulation, CCM synchronization) requires MPS Intelli-Phase™ devices like MP86933. External drivers must replicate CSx current mirroring and accept CCM logic-level control for AAM mode.

How is the load-line resistance programmed on MP2935DQK-LF-Z?

Load-line resistance is set via the IDROOP output pin, which sources/sinks current proportional to sensed output current. An external resistor from IDROOP to GND establishes the droop slope; typical values range from 10 kΩ to 100 kΩ depending on target voltage deviation per ampere.

What is the function of the CCM pin, and how does it interact with power states?

The CCM pin is an open-drain output that drives low in PS2 and PS3 to enable diode emulation mode on connected Intelli-Phase™ drivers, forcing discontinuous conduction. In PS0 and PS1, it remains high to sustain continuous conduction mode-ensuring optimal efficiency across the full load range.

Does MP2935DQK-LF-Z support reverse voltage protection, and how is it implemented?

Yes-MP2935DQK-LF-Z includes reverse voltage protection (RVP) triggered when VOSEN falls below GNDSEN by −300 mV (falling edge) or −100 mV (rising edge). This prevents damage during hot-swap or inductive kickback events and asserts FAULT# to halt operation.

How is the ICCMAX current limit configured, and what is its relationship to IMON?

ICCMAX is set via a resistor divider from VDD (3.3 V) to GND on the ICCMAX pin; the resulting voltage programs the overcurrent threshold register. IMON current is derived from VCM and scaled 1:16, so IMON voltage directly reflects total load current and triggers at 1.28 V when ICCMAX is reached.

What thermal management features does MP2935DQK-LF-Z provide beyond VRHOT#?

In addition to VRHOT#, MP2935DQK-LF-Z integrates a dedicated TEMP pin with on-chip ADC (register 17h) for direct die-temperature monitoring, and OTPG/OTPD pins for factory-programmed thermal shutdown thresholds-enabling both platform-level throttling and silicon-level safety cutoff.

MP2935DQK-LF-Z Specifications

Product attributes: Attribute value

Manufacturer:: Monolithic Power Systems Inc.

Series:: -

Package/Case:: 40-VFQFN Exposed Pad

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

Applications:: Controller, Intel VR12.5

Voltage - Input:: 4.5V ~ 5.5V

Number of Outputs:: 1

Voltage - Output:: 0V ~ 3.04V

Operating Temperature:: -40°C ~ 125°C

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 40-QFN (6x6)

MP2935DQK-LF-Z FAQ

1.How can I place an order for MP2935DQK-LF-Z through Aetrix?

Please submit a Request for Quotation (RFQ) for MP2935DQK-LF-Z 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 MP2935DQK-LF-Z reliable?

The price and inventory of MP2935DQK-LF-Z are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MP2935DQK-LF-Z is usually 5 days.

3.What payment methods are accepted for MP2935DQK-LF-Z?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP2935DQK-LF-Z transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MP2935DQK-LF-Z?

MP2935DQK-LF-Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MP2935DQK-LF-Z 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 MP2935DQK-LF-Z?

For technical support, including MP2935DQK-LF-Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP2935DQK-LF-Z requirements.

6.How does Aetrix verify that MP2935DQK-LF-Z is sourced from the original manufacturer or authorized distributors?

All MP2935DQK-LF-Z 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 MP2935DQK-LF-Z meets industry standards.

7.What is the process for return or replacement of MP2935DQK-LF-Z?

All MP2935DQK-LF-Z units undergo pre-shipment inspection (PSI). If there is an issue with MP2935DQK-LF-Z, 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 MP2935DQK-LF-Z part is unused and in its original packaging.

Return procedure for MP2935DQK-LF-Z:

1.Submit a request within 90 days.

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

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