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

Monolithic Power Systems Inc. MP2935DQK-LF-P

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

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Part No.:: MP2935DQK-LF-P

Manufacturer:: Monolithic Power Systems Inc.

Category:: Special Purpose Regulators

Package:: 40-VFQFN Exposed Pad

Datasheet:: MP2935DQK-LF-P.pdf

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

Quantity:: RFQ Add To RFQ list

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Product details

Overview

MP2935DQK-LF-P from Monolithic Power Systems is a VR12.5-compliant, 4-phase synchronous buck PWM controller with SVID interface for Intel® CPU voltage regulation. It delivers up to 2 MHz per phase, supports dynamic phase shedding (1–4 phases), implements programmable load-line droop, and features tri-state PWM outputs for Intelli-Phase™ gate drivers. Used in high-performance desktop/server VRMs delivering 1.0–3.04 V at >100 A.

For engineers reviewing the MP2935DQK-LF-P datasheet, MP2935DQK-LF-P pinout, MP2935DQK-LF-P application, or MP2935DQK-LF-P equivalent, key selection criteria include SVID compliance, multi-phase current balancing accuracy, FAST-PWM transient response, VRHOT#/FAULT# fault signaling, and compatibility with MPS Intelli-Phase™ power stages.

Technical Context

The MP2935 employs constant-frequency current-mode control with trailing-edge PWM and injected valley-current sensing for per-phase current balance. Its error amplifier drives a COMP node referenced to a precision 2.5 V VCM rail, while the SVID interface enables real-time VID updates and power-state transitions (PS0–PS3).

Dynamic operation shifts between full 4-phase PWM in PS0 and single-phase AAM (Advanced Asynchronous Mode) in PS1–PS3, with diode emulation enabled in PS2/PS3. Phase count is fixed at enable time via PWMx pin logic levels, not runtime reconfigurable.

Key Specifications

Parameter	Value and Actual Design Meaning
Phases	4-phase interleaved operation, configurable down to 1 active phase via PWM pin logic
Switching Frequency	Up to 2 MHz per phase; master clock divided by active phase count (e.g., 600 kHz @ 4-phase)
Output Voltage Range	0 V to 3.04 V via 8-bit SVID DAC; ±0.5% DC accuracy over temperature
Load-Line Droop	Programmable resistance via IDROOP output and external resistor; maintains optimal VOUT during load transients
Current Sensing	VCM-based current mirror input; IMON analog output proportional to total load current (1:16 scaling)
Fault Protection	Adjustable OCP threshold, latch-off delay on short-circuit, masked VR_RDY during VID transitions
Thermal Monitoring	Integrated TEMP ADC with VRHOT# open-drain output; programmable trip point via TMAX resistor

Pinout & Package

MP2935DQK-LF-P is housed in a thermally enhanced 6 mm × 6 mm, 40-lead QFN package with exposed thermal pad (GND). Package meets RoHS, halogen-free, and lead-free requirements.

Pin/Terminal	Circuit Role	Design Meaning
15–18 (PWM1–PWM4)	Tri-state PWM outputs	Logic-high disables corresponding phase; determines active phase count at EN assertion
21–24 (CS1–CS4)	Per-phase current sense inputs	Feed valley-current signals to internal current-balance amplifier; float unused pins
10 (IMON)	Analog current monitor output	Sources current proportional to total load (I_MON = I_VCM/16); sets gain with R_IMON
35 (VOSEN) / 36 (GNDSEN)	Remote voltage sense pair	Connects directly to CPU die VCCSENSE and ground for accurate load-line compensation
7 (VRHOT#) / 14 (FAULT#)	Open-drain fault outputs	Assert low on thermal exceedance or OCP event; require external pull-up resistors

Key Features

Feature	Design Value
VR12.5 SVID Compliance	Fully implements Intel VR12.5 protocol including PS0–PS3 state transitions, SetVID timing, and VR_READY handshake
FAST-PWM Transient Mode	Overrides phase clock during load steps to turn on all PWMs simultaneously, minimizing VOUT droop
Active Current Balancing	Real-time per-phase current matching using CSx inputs and internal ramp generator; reduces thermal imbalance
Programmable Load Line	Droop slope set via IDROOP current and external resistor; ensures optimal VOUT positioning across load range
Intelli-Phase™ Interface	Tri-state PWM outputs and CCM pin synchronize seamlessly with MPS gate drivers for CCM/DCM/AAM mode control

Applications

Desktop CPU VRM

Server Processor VRM

Use Scenario: Primary voltage regulator for Intel Core i7/i9 desktop CPUs with dynamic load from 0 A to >100 A.

IC Role / Device Role / Timing Role: VR12.5-compliant 4-phase PWM controller managing power delivery, phase shedding, and adaptive voltage positioning.

Use Value: Enables sub-10 mV load-step droop via FAST-PWM and precise load-line tuning, meeting Intel VR12.5 transient specifications.

Use Scenario: High-current VRM for dual-socket Xeon Scalable processors in 1U/2U servers.

IC Role / Device Role / Timing Role: Multi-phase controller coordinating up to four Intelli-Phase™ power stages with remote sensing and thermal throttling.

Use Value: Delivers stable 1.8 V @ 120 A with <±0.5% DC accuracy and VRHOT# thermal alerting to prevent CPU thermal throttling.

Workstation GPU VRM

High-Performance Computing Node

Use Scenario: Secondary VRM supplying core voltage to professional-grade GPUs (e.g., NVIDIA RTX A-series) in CAD/ML workstations.

IC Role / Device Role / Timing Role: SVID-controlled 4-phase controller supporting rapid VID changes and precise current monitoring via IMON.

Use Value: Provides accurate real-time current readback (via IMON ADC) for GPU power management firmware and thermal co-design.

Use Scenario: VRM for FPGA/ASIC accelerators requiring tightly regulated 1.2 V supply with fast transient response.

IC Role / Device Role / Timing Role: Programmable load-line controller implementing AVP to maintain optimal VOUT under varying computational loads.

Use Value: Reduces system-level power loss by 3–5% through dynamic droop tuning, validated against Intel IMVP-VR12.5 compliance tests.

Equivalent & Alternatives

The following parts are listed as comparable options for similar 4-phase VR12.5 controller applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
MP2965DQK-LF-Z	Successor device; adds VR13/IMVP9 support, higher max frequency (3 MHz), improved ADC resolution (10-bit IMON), and enhanced thermal protection	Required for new designs targeting Intel 12th+ Gen CPUs; backward-compatible with VR12.5 but not pin-for-pin	Select MP2965 for new VR13/IMVP9 platforms or where extended lifecycle and enhanced diagnostics are needed.
ISL6367IRZ	Intersil (Renesas) VR12.5 controller; 4-phase, supports DCR current sensing, no integrated VDD LDO, different SVID timing margins	Legacy design reuse where ISL6367 footprint and BOM already qualified; requires external 3.3 V supply	Choose ISL6367 only for drop-in replacement in existing Renesas-based VRMs; verify SVID timing and fault mask behavior.

Compared with MP2935DQK-LF-P, MP2965 offers VR13 readiness and tighter current monitoring, while ISL6367 provides legacy compatibility but lacks integrated VDD regulation and FAST-PWM mode-making MP2935 optimal for cost-sensitive VR12.5 upgrades with minimal board change.

Availability

MP2935DQK-LF-P is available at Aetrix Electronics and suitable for desktop CPU VRMs, server processor power delivery, and high-performance computing nodes requiring stable component supply and long-term industrial availability.

Supply support for MP2935DQK-LF-P 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 design centers in the US, China, and Taiwan.

The MP2935 belongs to MPS's VR12.5 CPU power controller product line, engineered specifically for Intel microprocessor voltage regulation with emphasis on transient response, multi-phase efficiency, and SVID protocol fidelity.

FAQ

What is the maximum supported output current for MP2935DQK-LF-P?

The MP2935 itself does not limit output current; it controls external MOSFETs. With four properly sized Intelli-Phase™ stages and adequate PCB layout, systems achieve >120 A continuous output. The ICCMAX register supports up to 255 A (8-bit), and IMON scaling allows accurate current monitoring across that full range using R_IMON and R_ICCMAX resistors.

Does MP2935DQK-LF-P support dynamic phase shedding during operation?

No. Phase count is determined at enable time based on PWM1–PWM4 logic states and remains fixed until the next EN cycle. While power states (PS0–PS3) dynamically switch between full-phase PWM and single-phase AAM modes, the number of *active* phases cannot be changed on-the-fly without toggling EN or resetting the controller.

How is the load-line droop programmed on MP2935DQK-LF-P?

Load-line droop is set via the IDROOP pin, which sources a current proportional to sensed output current. An external resistor from IDROOP to GND converts this current into a voltage drop across the feedback network, creating the desired VOUT vs. IOUT slope. Typical values range from 0.5 mΩ to 2 mΩ equivalent resistance, calibrated using the datasheet's droop equation and measured VOUT deviation.

Can MP2935DQK-LF-P be used with non-MPS gate drivers?

Yes, but with caveats. Its tri-state PWM outputs are compatible with standard logic-level gate drivers, yet optimal performance-especially current balancing and FAST-PWM timing-requires synchronization with MPS Intelli-Phase™ devices via the CCM and SYNC interface. Using third-party drivers may necessitate external slope compensation and careful timing validation against VR12.5 spec limits.

What is the purpose of the VCLAMP pin?

VCLAMP sets the per-phase overcurrent protection threshold. A resistor from VCLAMP to GND programs the clamp voltage, which defines the maximum allowable current sense voltage at the CS pins before triggering OCP. This provides independent, adjustable current limiting per phase-critical for handling mismatched inductor DCR or thermal derating scenarios without false trips.

Is MP2935DQK-LF-P still recommended for new designs?

No. MP2935 is End-of-Life (EOL); MPS explicitly directs users to migrate to MP2965 for new designs. MP2965 maintains VR12.5 compatibility while adding VR13/IMVP9 support, higher switching frequencies, and enhanced diagnostics. MP2935DQK-LF-P remains available for legacy repair and continuity builds, but no new design starts should use it.

MP2935DQK-LF-P 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-P FAQ

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

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

The price and inventory of MP2935DQK-LF-P 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-P is usually 5 days.

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

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

Note: Certain payment methods may incur a processing fee.

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

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

Once your MP2935DQK-LF-P 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-P?

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

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

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

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

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

Return procedure for MP2935DQK-LF-P:

1.Submit a request within 90 days.

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

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