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

STMicroelectronics L6714

Name: L6714
Brand: STMicroelectronics
SKU: L6714
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: L6714

Manufacturer:: STMicroelectronics

Category:: Special Purpose Regulators

Package:: 64-TQFP Exposed Pad

Datasheet:: L6714.pdf

Description:: IC REG CTRLR VR10 4OUT 64TQFP

Quantity:: RFQ Add To RFQ list

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Inventory:1,182

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Product details

Overview

L6714 from STMicroelectronics is a 4-phase synchronous buck controller with integrated high-current gate drivers, designed for Intel VR10.x/VR11 and AMD 6-bit CPU voltage regulation. It delivers ±0.5% output voltage accuracy, supports up to 1.60000 V (Intel) or 1.5500 V (AMD), features full differential current sensing across inductor or low-side MOSFET, embeds VRD thermal monitoring, and operates in TQFP64 package with exposed pad for desktop/server CPU power supplies.

For engineers reviewing the L6714 datasheet, L6714 pinout, L6714 application, or L6714 equivalent, key selection criteria include phase-shifted 4-phase control architecture, programmable DAC mode selection (Intel vs. AMD), differential current sense flexibility, embedded thermal alarm outputs (VR_HOT/VR_FAN), and soft-start timing control via SSOSC/REF pin.

Technical Context

The L6714 implements a fixed 90° phase shift across four PWM channels with adaptive anti-cross-conduction logic per phase. Its oscillator runs at 150 kHz per phase (600 kHz effective at output) and is externally adjustable via OSC/FAULT pin using a resistor-to-ground or resistor-to-VCC configuration.

It integrates dual-mode DACs: 7/8-bit for Intel VR10.x/VR11 (1.60000 V max) and 6-bit for AMD (1.5500 V max), both supporting dynamic VID transitions. Current sensing is selectable between low-side MOSFET R_DS(on) or inductor DCR, with independent CH1–CH4 CS± inputs and dedicated OCP comparators per channel.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Voltage Accuracy	±0.5% over line, load, and temperature - ensures tight CPU core voltage regulation under dynamic load transients.
Max Output Voltage	1.60000 V (Intel VR10.x/VR11) or 1.5500 V (AMD 6-bit) - matches VID table compliance for respective CPU families.
Phase Configuration	4-phase with 90° inter-phase shift - reduces input/output ripple and improves current sharing in high-current VRD designs.
Switching Frequency	150 kHz per phase (600 kHz effective) - sets fundamental switching point; externally adjustable via OSC/FAULT pin.
Current Sensing	Differential inputs per phase (CS1±–CS4±) - enables flexible implementation using either low-side MOSFET or inductor DCR sensing.
Thermal Monitoring	Integrated TM input with VR_HOT (alarm) and VR_FAN (warning) open-drain outputs - provides system-level thermal protection without external ICs.
Soft-Start Control	SSOSC/REF pin programs soft-start time via resistor (20.1612 µs/kΩ gain) - allows precise ramp rate tuning for inrush current limiting.

Pinout & Package

TQFP64 (10 mm × 10 mm) with exposed thermal pad - optimized for high-power CPU VRD applications requiring efficient heat dissipation and compact layout.

Pin/Terminal	Circuit Role	Design Meaning
UGATE1–UGATE4	High-side driver outputs	Drive external N-channel HS MOSFET gates with adaptive dead-time control to prevent shoot-through.
LGATE1–LGATE4	Low-side driver outputs	Drive external N-channel LS MOSFET gates; each referenced to its own PGNDx for accurate current sensing.
CS1±–CS4±	Differential current sense inputs	Accept bidirectional current measurement signals from either LS MOSFET source/drain or inductor DCR network.
VID0–VID7 / D-VID	Digital voltage identification interface	Configures output voltage per Intel VR10/VR11 or AMD 6-bit VID tables; D-VID output signals active transitions in AMD mode.
VR_HOT / VR_FAN	Thermal alarm outputs	Open-drain signals indicating temperature warning (VR_FAN) or critical overtemperature (VR_HOT) based on TM pin voltage.
SS_END / PGOOD	Startup status indicator	Open-drain signal pulled low during soft-start or fault; released upon successful startup (PGOOD in AMD mode, SS_END in Intel mode).

Key Features

Feature	Design Value
Embedded VRD thermal monitor	Direct TM pin interface with dual-threshold detection enabling hardware-based thermal shutdown before CPU throttling occurs.
Programmable reference offset	Single external ROFFSET resistor adds positive offset to FB node - enables fine-tuning of output voltage beyond VID code resolution.
Low-Side-Less startup	Enables initial regulation without LS MOSFET conduction - avoids inrush through body diode during cold start or phase loss scenarios.
Preliminary over-voltage protection	Active before UVLO - detects fast-rising output faults prior to full device enable, preventing damage during power-up anomalies.
Constant over-current protection	Enters constant-current mode during overload until UVP triggers - maintains regulated current delivery while avoiding catastrophic failure.

Applications

Desktop CPU VRD

Workstation VRM Module

Use Scenario: High-current power delivery to dual-core and quad-core Intel/AMD desktop processors with dynamic VID scaling.

IC Role / Device Role / Timing Role: 4-phase buck controller managing real-time voltage positioning, phase interleaving, and thermal-aware current limiting.

Use Value: Enables sub-500 mV output ripple and ±0.5% regulation accuracy required for stable overclocking and multi-threaded workloads.

Use Scenario: Compact, high-efficiency VRM module for professional workstation motherboards supporting Xeon or Ryzen Threadripper CPUs.

IC Role / Device Role / Timing Role: Primary voltage regulator IC implementing droop control, remote sensing, and programmable soft-start for multi-rail systems.

Use Value: Reduces BOM count by integrating gate drivers, thermal monitoring, and DAC logic - eliminating need for discrete sense amplifiers or supervisor ICs.

Server CPU Power Supply

VRM Reference Design Platform

Use Scenario: 1U/2U rack server motherboard delivering >150 A to dual-socket Xeon Scalable processors.

IC Role / Device Role / Timing Role: Core 4-phase controller coordinating parallel power stages with synchronized current sharing and OCP fault reporting.

Use Value: Supports full differential current sensing per phase - ensures accurate load balancing across MOSFETs even with PCB trace mismatch.

Use Scenario: STMicroelectronics' official L6714 evaluation platform used by OEMs to validate VRM layout, compensation, and thermal performance.

IC Role / Device Role / Timing Role: Reference implementation demonstrating proper BOOT capacitor routing, current sense filtering, and VR_HOT/VR_FAN integration.

Use Value: Accelerates time-to-market by providing validated schematics, layout guidelines, and thermal derating curves for production-grade VRDs.

Equivalent & Alternatives

The following parts are listed as comparable options for similar 4-phase CPU voltage regulator controller applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
ISL6322	3-phase controller with integrated drivers; lacks VRD thermal monitor and AMD 6-bit DAC support.	Targeted at mid-range desktop platforms with lower current demand (<120 A); no VR_HOT/VR_FAN outputs.	Select when thermal monitoring is handled externally and Intel-only VID support suffices.
RT8803	4-phase controller with 0.8% voltage accuracy; supports Intel VR12 but not AMD 6-bit mode or embedded thermal sensing.	Designed for newer VR12-compliant CPUs; requires external thermal IC for overtemperature protection.	Choose for VR12 migration paths where higher accuracy tolerance is acceptable and discrete thermal management is preferred.

Compared with ISL6322 and RT8803, the L6714 uniquely combines Intel/AMD dual-DAC support, ±0.5% accuracy, integrated thermal monitoring, and 4-phase interleaving - making it optimal for legacy high-current VRD designs requiring backward compatibility and hardware-level safety features.

Availability

L6714 is available at Aetrix Electronics and suitable for desktop CPU VRD, workstation VRM modules, and server CPU power supplies requiring stable component supply and long-term industrial availability.

Supply support for L6714 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

STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, specializing in power management, microcontrollers, and analog ICs for industrial, automotive, and computing markets.

The L6714 belongs to ST's VRD/VRM controller product line, engineered specifically for high-efficiency, multi-phase CPU voltage regulation in desktop, workstation, and entry-server platforms with strict thermal and accuracy requirements.

FAQ

What CPU families does the L6714 support?

The L6714 supports Intel VR10.x and VR11 CPUs via its 7/8-bit DAC and AMD 6-bit CPUs via its dedicated 6-bit DAC. VID_SEL and DAC/CS_SEL pins configure the mode at power-up; dynamic VID transitions are supported in both modes, and voltage accuracy is maintained at ±0.5% across temperature and line variations.

How is current sensing implemented on the L6714?

Current sensing uses four independent differential input pairs (CS1± to CS4±), configurable per phase for either low-side MOSFET R_DS(on) sensing or inductor DCR sensing. The DAC/CS_SEL pin selects the method globally, and each channel includes dedicated OCP comparators with constant-current foldback behavior during overload.

Does the L6714 require external gate drivers?

No - the L6714 integrates high-current gate drivers for both high-side and low-side MOSFETs per phase (UGATE1–4 and LGATE1–4). Each driver supports adaptive anti-cross-conduction logic and is rated for typical gate charge loads of CPU VRD applications without external buffering.

What thermal protection features does the L6714 provide?

The L6714 includes an integrated thermal monitor with TM pin input, generating two open-drain outputs: VR_FAN (warning threshold) and VR_HOT (critical alarm threshold). These signals interface directly with system fans or host controllers and remain active even if VCC drops below UVLO, ensuring fail-safe thermal response.

L6714 Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

Package/Case:: 64-TQFP Exposed Pad

Packaging:: Tray

Product Status:: Obsolete

Applications:: Controller, Intel VR10, VR11, AMD CPU

Voltage - Input:: 12V

Number of Outputs:: 4

Voltage - Output:: 0.3V ~ 1.6V

Operating Temperature:: 0°C ~ 70°C

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 64-TQFP-EP (10x10)

L6714 FAQ

1.How can I place an order for L6714 through Aetrix?

Please submit a Request for Quotation (RFQ) for L6714 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 L6714 reliable?

The price and inventory of L6714 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for L6714 is usually 5 days.

3.What payment methods are accepted for L6714?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for L6714 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for L6714?

L6714 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your L6714 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 L6714?

For technical support, including L6714 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your L6714 requirements.

6.How does Aetrix verify that L6714 is sourced from the original manufacturer or authorized distributors?

All L6714 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 L6714 meets industry standards.

7.What is the process for return or replacement of L6714?

All L6714 units undergo pre-shipment inspection (PSI). If there is an issue with L6714, 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 L6714 part is unused and in its original packaging.

Return procedure for L6714:

1.Submit a request within 90 days.

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

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