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

STMicroelectronics L6714TR

Name: L6714TR
Brand: STMicroelectronics
SKU: L6714TR
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: L6714TR

Manufacturer:: STMicroelectronics

Category:: Special Purpose Regulators

Package:: 64-TQFP Exposed Pad

Datasheet:: L6714TR.pdf

Description:: IC REG CTRLR VR10 4OUT 64TQFP

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Product details

Overview

L6714TR 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, and operates with 90° phase shift per channel in TQFP64 package with exposed pad - deployed in high-current desktop/server VRD power supplies.

For engineers reviewing the L6714TR datasheet, L6714TR pinout, L6714TR application, or L6714TR equivalent, this device requires attention to DAC selection (VID_SEL/DAC_CS_SEL), programmable OVP threshold (ROVP), thermal monitor configuration (TM/VR_HOT/VR_FAN), and dual-mode soft-start (SSOSC/REF), all critical for stable multi-phase CPU core voltage delivery under dynamic load transitions.

Technical Context

The L6714TR implements a four-phase interleaved PWM architecture with adaptive anti-cross-conduction logic per channel and fixed 150 kHz base oscillator (externally adjustable via OSC/FAULT pin). Each phase includes dedicated UGATE/LGATE drivers, boot circuitry (BOOTx/PHASEx), and independent current-sense inputs (CSx+/CSx−) supporting either low-side MOSFET or inductor DCR sensing.

It embeds dual DAC architectures: 7/8-bit Intel VR10.x/VR11 (VID0–VID7, VID_SEL-controlled) and 6-bit AMD mode (VID0–VID5), both referenced to a 1.240 V internal offset source. Voltage positioning includes droop (DROOP pin), programmable reference offset (OFFSET pin), and dynamic VID management with SS_END/PGOOD signaling.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Accuracy	±0.5% over line, load, and temperature - ensures tight CPU core voltage compliance for VR10/VR11/AMD 6-bit specifications.
Voltage Range	Up to 1.60000 V (Intel VR10.x/VR11) or 1.5500 V (AMD 6-bit) - selectable via DAC/CS_SEL and VID_SEL pins.
Phase Configuration	4-phase interleaved with 90° phase shift - reduces input/output ripple and enables higher effective switching frequency at load.
Current Sensing	Dual-mode: low-side MOSFET R_DS(on) or inductor DCR - configurable per channel via CSx+/CSx− inputs and DAC/CS_SEL resistor.
Oscillator Frequency	Internally fixed at 150 kHz per phase (600 kHz effective at output); externally adjustable via OSC/FAULT pin - sets timing for PWM generation and protection response.
Protection Features	Programmable OVP (ROVP), preliminary OVP, constant over-current, UVLO, and thermal monitoring (TM/VR_HOT/VR_FAN) - enables robust fault recovery without external supervision.
Package	TQFP64 (10 mm × 10 mm) with exposed thermal pad - supports high-power dissipation in compact VRM modules.

Pinout & Package

TQFP64 package with exposed thermal pad (mechanical data per STMicroelectronics Doc. 6714-67); pin count: 64; body size: 10 mm × 10 mm; pitch: 0.5 mm; RoHS-compliant.

Pin/Terminal	Circuit Role	Design Meaning
UGATE1–UGATE4	High-side gate driver outputs	Drive N-channel HS MOSFET gates with adaptive dead-time control; require series resistors for EMI/power optimization.
LGATE1–LGATE4	Low-side gate driver outputs	Drive N-channel LS MOSFET gates; each referenced to respective PGNDx for accurate current sensing.
CS1+ to CS4−	Differential current sense inputs	Accept either low-side R_DS(on) voltage or inductor DCR voltage; enable per-phase current balancing and OCP.
VID0–VID7 / D-VID	Digital voltage identification interface	Set target output voltage: 8-bit for Intel VR10.x/VR11 (VID0–VID7), 6-bit for AMD (VID0–VID5); D-VID output signals transition completion.
SS_END / PGOOD	Soft-start completion or power-good indicator	Open-drain signal: pulled low during soft-start or fault; released when output reaches regulation (Intel) or VSEN threshold (AMD).
TM, VR_HOT, VR_FAN	Thermal monitoring interface	TM senses die temperature; VR_HOT asserts on alarm threshold (125°C typ), VR_FAN on warning threshold (105°C typ) - enables system-level thermal throttling.

Key Features

Feature	Design Value
Embedded VRD thermal monitor	On-die temperature sensing with two programmable thresholds (warning/alarm) drives open-drain VR_FAN/VR_HOT outputs for host system thermal management.
Dynamic VID management	Supports real-time voltage scaling via VID code updates; D-VID pin confirms transition completion after 32 clock cycles - essential for CPU power state transitions (C-states).
Adjustable reference voltage offset	1.240 V internal reference; OFFSET pin accepts external resistor to inject programmable positive offset into FB node - enables precise voltage positioning for droopless or droop-based designs.
Low-Side-Less startup	Enables initial startup without low-side MOSFET conduction - avoids shoot-through risk during initial bootstrap capacitor charging in high-V_IN applications.
Full differential current sensing	Per-phase CSx+/CSx− inputs support either low-side R_DS(on) or inductor DCR sensing - eliminates need for external current-sense amplifiers and improves phase current matching.

Applications

Desktop CPU VRD

Workstation VRM Module

Use Scenario: High-current voltage regulation for Intel Core 2 Duo or AMD Athlon 64 FX processors in ATX desktop motherboards.

IC Role / Device Role / Timing Role: 4-phase controller managing core V_DD with dynamic VID updates during P-state transitions and thermal throttling via VR_HOT.

Use Value: ±0.5% accuracy and droop compensation maintain CPU stability under 100 A transient loads while minimizing output capacitance.

Use Scenario: Compact, high-efficiency VRM module for dual-socket Xeon workstation platforms requiring remote sense and thermal telemetry.

IC Role / Device Role / Timing Role: Centralized 4-phase controller with integrated drivers and remote sense buffer (FBR/FBG) delivering regulated 1.25 V @ 120 A to CPU cores.

Use Value: Integrated remote sense buffer eliminates layout sensitivity; VR_FAN/VR_HOT outputs feed BMC for predictive fan speed control and thermal event logging.

Server CPU Power Supply

Embedded Computing VRD

Use Scenario: Multi-rail power supply for dual-CPU server boards supporting VR11 compliance and PMBus-compatible sequencing.

IC Role / Device Role / Timing Role: Primary VRD controller implementing Intel VR11 DAC, programmable OVP (ROVP), and SS_END signaling for coordinated rail bring-up.

Use Value: Preliminary OVP detection before UVLO prevents catastrophic failure during hot-swap events; constant OCP mode sustains current until UVP triggers graceful shutdown.

Use Scenario: Space-constrained embedded computing platform (e.g., COM Express Type 7) requiring scalable CPU voltage with minimal BOM count.

IC Role / Device Role / Timing Role: Single-chip 4-phase solution with embedded drivers and thermal monitor - replaces discrete controller + driver + sensor ICs.

Use Value: TQFP64 exposed-pad package achieves <15°C/W θ_JA; integrated current sensing eliminates four external sense resistors and associated layout area.

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
ISL6322IRZ	3-phase controller with external drivers; no embedded thermal monitor; supports VR11 but not AMD 6-bit DAC.	Requires external high-current drivers and separate thermal IC; limited to Intel-only platforms.	Select when board space allows discrete driver placement and thermal monitoring is handled by system BMC.
RT8803AZSP	4-phase controller with integrated drivers; supports VR11 and AMD 6-bit; ±0.8% accuracy; no droop function or DROOP pin.	Lacks programmable droop and dedicated thermal alarm outputs (VR_HOT/VR_FAN); uses single thermal alert pin.	Choose for cost-sensitive VRMs where ±0.8% accuracy suffices and thermal telemetry is simplified.

Compared with ISL6322IRZ and RT8803AZSP, the L6714TR uniquely combines Intel/AMD DAC support, ±0.5% accuracy, per-phase current sensing flexibility, and dual-threshold thermal outputs - making it optimal for high-reliability desktop/server VRDs requiring full VRD specification compliance and autonomous thermal protection.

Availability

L6714TR is available at Aetrix Electronics and suitable for desktop CPU VRD, workstation VRM modules, and server CPU power supplies requiring stable component supply, long-term lifecycle support, and traceable sourcing for industrial-grade deployments.

Supply support for L6714TR 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 L6714TR belongs to ST's VRD/VRM controller product line, engineered specifically for high-efficiency, multi-phase CPU core voltage regulation in desktop, workstation, and server platforms compliant with Intel VR10/VR11 and AMD 6-bit specifications.

FAQ

What is the function of the DAC/CS_SEL pin on the L6714TR?

The DAC/CS_SEL pin sources a constant 12.5 µA current and selects both the integrated DAC (Intel VR10.x/VR11 vs. AMD 6-bit) and current-sensing method (low-side MOSFET vs. inductor DCR) via an external resistor to SGND. Its value determines DAC mapping and sensing topology - it cannot be changed dynamically during operation and must be set at power-on.

How does the L6714TR implement thermal protection?

The L6714TR integrates a die-temperature sensor connected to the TM pin. When temperature exceeds 105°C, VR_FAN asserts; above 125°C, VR_HOT asserts - both open-drain outputs. These signals drive system fans or trigger CPU throttling. TM must be shorted to SGND if unused, and thermal monitoring activates only when VCC exceeds UVLO threshold.

Can the L6714TR operate with only three active phases?

No - the L6714TR is a fixed 4-phase controller with hardwired 90° phase-shift timing and dedicated gate drivers for all four channels. Disabling a phase (e.g., by leaving UGATE/LGATE unconnected) disrupts current sharing, protection coordination, and oscillator synchronization; it is not supported per datasheet design intent or electrical characterization.

What is the role of the DROOP pin in voltage positioning?

The DROOP pin sources a current proportional to total output current. Shorting it to FB implements automatic droop compensation (reducing output voltage linearly with load current), improving transient response and current sharing across phases. Connecting it to SGND disables droop; adding a resistor/capacitor enables custom current-derived feedback for specialized regulation schemes.

L6714TR Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

Package/Case:: 64-TQFP Exposed Pad

Packaging:: Tape & Reel (TR)

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)

L6714TR FAQ

1.How can I place an order for L6714TR through Aetrix?

Please submit a Request for Quotation (RFQ) for L6714TR 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 L6714TR reliable?

The price and inventory of L6714TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for L6714TR is usually 5 days.

3.What payment methods are accepted for L6714TR?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for L6714TR transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for L6714TR?

L6714TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your L6714TR 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 L6714TR?

For technical support, including L6714TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your L6714TR requirements.

6.How does Aetrix verify that L6714TR is sourced from the original manufacturer or authorized distributors?

All L6714TR 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 L6714TR meets industry standards.

7.What is the process for return or replacement of L6714TR?

All L6714TR units undergo pre-shipment inspection (PSI). If there is an issue with L6714TR, 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 L6714TR part is unused and in its original packaging.

Return procedure for L6714TR:

1.Submit a request within 90 days.

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

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