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Analog Devices Inc. LTC3719EG#TRPBF
- Part No.:
- LTC3719EG#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Special Purpose Regulators
- Package:
- 36-SSOP (0.209", 5.30mm Width)
- Datasheet:
-
LTC3719EG#TRPBF.pdf
- Description:
- IC REG CTRLR AMD 1OUT 36SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,572
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Product details
Overview
LTC3719EG#TRPBF from Analog Devices (formerly Linear Technology) is a 2-phase, VID-programmable, synchronous step-down switching regulator controller driving two external N-channel MOSFETs in fixed-frequency current-mode architecture. It delivers up to 45A output at 0.8V–1.55V with ±1% voltage accuracy, true remote differential sensing, and programmable 150kHz–300kHz operation - optimized for AMD Opteron™ CPU core power delivery in servers and workstations.
For engineers reviewing the LTC3719EG#TRPBF datasheet, LTC3719EG#TRPBF pinout, LTC3719EG#TRPBF application, or LTC3719EG#TRPBF equivalent, key selection criteria include its dual-phase antiphase timing for input/output ripple reduction, OPTI-LOOP® compensation for wide ESR capacitor support, three selectable operating modes (PWM/Burst/Cycle Skip), and integrated differential amplifier for high-current remote sensing.
Technical Context
The LTC3719EG#TRPBF implements constant-frequency current-mode control with 180° phase separation between channels, enabling RMS input/output capacitor current reduction and improved transient response. Its error amplifier drives the ITH node (0–2.4V range) to modulate peak inductor current, while the internal 0.600V reference (±0.006V tolerance) sets regulated feedback voltage at EAIN.
Frequency is set via PLLFLTR pin voltage (140–310kHz range) or synchronized externally via PLLIN; FCB pin selects forced continuous, Burst Mode®, or cycle-skip operation. The controller integrates a unity-gain differential amplifier (ADA = 0.995–1.005 V/V, CMRR ≥46dB) and true remote sensing (VOS+/VOS− inputs) to maintain regulation under high-current PCB trace losses.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage Range | 0.8V to 1.55V via 5-bit VID code - supports dynamic CPU core voltage scaling per AMD specification. |
| Output Voltage Accuracy | ±1% over temperature - ensures stable core supply under load transients and thermal drift. |
| Switching Frequency | 150kHz to 300kHz programmable - balances efficiency, size, and EMI; antiphase operation halves effective input/output ripple frequency. |
| Current Sensing Threshold | 62mV to 88mV max - sets peak inductor current limit; enables precise foldback during short-circuit conditions. |
| Differential Amplifier Gain | 0.995–1.005 V/V - provides true remote sensing of both VOUT+ and VOUT− terminals to compensate for IR drops in high-current paths. |
| Operating Input Voltage | 4V to 36V - supports wide-range industrial and server DC bus inputs including 5V, 12V, and 24V rails. |
| Package | 36-lead narrow SSOP (0.209" width) - surface-mount compatible with standard reflow profiles and thermal pad grounding. |
Pinout & Package
Package: 36-lead plastic SSOP (narrow, 0.209" body width), RoHS-compliant, moisture sensitivity level 3.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| RUN/SS (Pin 1) | Soft-start timer / run enable / short-circuit timeout | Capacitor-connected node controlling startup ramp time and latching shutdown during sustained overcurrent. |
| SENSE1+/SENSE2+ (Pins 2,14) | Positive current sense inputs | Connect to high-side of current sense resistors; used with SENSE– to set channel-specific peak current limits. |
| SENSE1–/SENSE2– (Pins 3,13) | Negative current sense inputs | Return path for differential current sensing; referenced to SGND, not PGND, enabling accurate low-side sensing. |
| EAIN (Pin 4) | Error amplifier inverting input | Receives feedback from VDIFFOUT divider; compared to internal 0.600V reference to regulate output voltage. |
| FCB (Pin 7) | Forced continuous mode select | Voltage-controlled input selecting PWM (≤0.6V), Burst Mode® (0.6–INTVCC–2V), or cycle-skip (≥INTVCC–2V) operation. |
| ITH (Pin 8) | Error amplifier output / compensation node | 0–2.4V control voltage setting peak inductor current; used for OPTI-LOOP® compensation network connection. |
| VDIFFOUT (Pin 10) | Differential amplifier output | Drives external resistor divider to set output voltage; enables active voltage positioning and remote sensing. |
| TG1/TG2 (Pins 24,35) | Top gate drivers | Floating high-side N-MOSFET drivers with INTVCC-referenced swing; require external bootstrap capacitors. |
| BG1/BG2 (Pins 27,31) | Bottom gate drivers | Ground-referenced N-MOSFET drivers; sink/source capability supports synchronous rectification. |
| PGOOD (Pin 36) | Power-good status indicator | Open-drain output asserting low when EAIN deviates >±10% from target - signals system controller of valid regulation. |
Key Features
| Feature | Design Value |
|---|---|
| 2-phase antiphase operation | Reduces RMS input/output capacitor ripple current by ~70%, enabling smaller CIN/COUT and lower ESR requirements. |
| OPTI-LOOP® compensation | Allows stable loop response across wide range of output capacitor types and ESR values without redesigning compensation network. |
| True remote differential sensing | Compensates for PCB trace resistance up to several milliohms - maintains ±1% regulation at 45A output with >10mΩ path loss. |
| Three selectable operating modes | Enables trade-off between light-load efficiency (Burst Mode®), noise performance (constant-frequency), and transient fidelity (forced PWM). |
| Integrated VID decoder & attenuator | Directly interfaces with AMD CPU VID bus; ATTENIN/ATTENOUT pins provide programmable feedback scaling for active voltage positioning. |
Applications
| Server CPU Core Power | Workstation GPU Core Supply |
|---|---|
Use Scenario: Delivering tightly regulated 0.8V–1.55V at up to 45A to AMD Opteron™ processors in 1U/2U rack servers with strict thermal and ripple constraints. IC Role / Device Role / Timing Role: Dual-phase synchronous buck controller managing antiphase gate drive timing, current sharing, and VID-based voltage scaling. Use Value: Reduces input capacitor RMS current by 75% versus single-phase design, lowering heat generation and enabling compact 12V input front-end. | Use Scenario: Providing dynamically scaled core voltage to high-end workstation GPUs requiring fast load-step response and <1% output deviation. IC Role / Device Role / Timing Role: Current-mode controller with OPTI-LOOP® and true remote sensing ensuring regulation stability across long PCB traces and multi-layer stackups. Use Value: Maintains ±1% accuracy at full load despite >5mΩ interconnect resistance, eliminating need for point-of-load regulators. |
| Industrial Embedded CPU Board | High-Density Telecom Power Module |
Use Scenario: Powering x86-based embedded controllers in ruggedized industrial PCs where wide VIN (4–36V) and thermal reliability are critical. IC Role / Device Role / Timing Role: Fixed-frequency 2-phase controller supporting dual-input rail capability for redundancy or load sharing between 12V and 24V supplies. Use Value: Enables seamless transition between input sources without output disturbance - critical for failover-capable systems. | Use Scenario: Integrating into compact ½-brick telecom modules requiring high-efficiency, low-noise 1.2V/30A output with minimal board area. IC Role / Device Role / Timing Role: Antiphase controller minimizing EMI through interleaved switching and reducing required output capacitance by 50%. Use Value: Achieves >92% efficiency at 20A with 12V input while meeting EN55022 Class B conducted EMI limits without added shielding. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-phase synchronous buck controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ISL6322IRZ | 6-bit VID interface, integrated MOSFET drivers rated for 60A total, no PLL synchronization input | Designed for Intel VR12 platforms; lacks true remote differential sensing and OPTI-LOOP® flexibility | Prefer for Intel CPU designs requiring higher current rating and simpler layout; avoid for AMD VID or remote sensing needs. |
| MP2940AGQSE | 4-phase capable, digital interface (PMBus), 0.5% reference accuracy, no analog PLLIN sync | Targeted at datacenter PSUs with telemetry and firmware update capability; requires digital control infrastructure | Select when system-level telemetry, phase shedding, or firmware-configurable parameters are required; not drop-in for analog VID systems. |
Compared with ISL6322IRZ and MP2940AGQSE, the LTC3719EG#TRPBF offers superior analog flexibility for AMD-specific VID decoding, true remote sensing for high-current integrity, and PLL-based synchronization - making it optimal for legacy server platforms where analog control and thermal simplicity are prioritized over digital telemetry.
Availability
LTC3719EG#TRPBF is available at Aetrix Electronics and suitable for server CPU power delivery, workstation GPU core supplies, and industrial embedded computing applications requiring stable component supply, long-lifecycle support, and guaranteed RoHS-compliant manufacturing.
Supply support for LTC3719EG#TRPBF 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
Analog Devices acquired Linear Technology in 2017 and maintains full product support, documentation, and manufacturing continuity for all Linear ICs including the LTC series.
The LTC3719EG#TRPBF belongs to Linear's high-performance power management controller family, specifically engineered for multiphase CPU/GPU core voltage regulation in enterprise computing environments demanding precision, reliability, and thermal efficiency.
FAQ
What is the operating temperature range for the LTC3719EG#TRPBF?
The LTC3719EG#TRPBF is specified for operation from –40°C to 85°C ambient temperature. While the LTC3719EG grade is guaranteed over 0°C to 70°C, full –40°C to 85°C performance is assured by design, characterization, and statistical process controls - making LTC3719EG#TRPBF suitable for industrial and server environments with extended thermal requirements.
How does the LTC3719EG#TRPBF implement remote voltage sensing?
The LTC3719EG#TRPBF uses dedicated VOS+ and VOS– pins feeding an internal unity-gain differential amplifier whose output (VDIFFOUT) drives the feedback divider. This architecture measures voltage directly at the load terminals, compensating for IR drops across PCB traces and connectors - a critical capability for maintaining ±1% regulation at 45A output current in the LTC3719EG#TRPBF.
Can the LTC3719EG#TRPBF synchronize to an external clock source?
Yes, the LTC3719EG#TRPBF supports external synchronization via the PLLIN pin, which connects to an internal phase detector. When an external clock is applied, the phase-locked loop aligns the rising edge of TG1 with the PLLIN signal's rising edge. This capability allows multiple LTC3719EG#TRPBF controllers to operate coherently in large-scale power systems, reducing beat frequencies and system-level EMI.
What protection features are integrated into the LTC3719EG#TRPBF?
The LTC3719EG#TRPBF integrates overvoltage soft latch (trip at ±10% of setpoint), undervoltage lockout (3.33V nominal), current foldback during short-circuit events, timed RUN/SS latchoff, and bottom-FET reverse-current detection. These protections act independently per phase and ensure robust operation of the LTC3719EG#TRPBF in fault conditions without external circuitry.
Does the LTC3719EG#TRPBF support active voltage positioning (AVP)?
Yes, the LTC3719EG#TRPBF supports AVP through its VID interface and differential amplifier architecture. By programming VID bits and using the ATTENIN/ATTENOUT pins to scale feedback, the LTC3719EG#TRPBF dynamically adjusts output voltage downward under increasing load - improving efficiency and thermal margin while maintaining regulation accuracy across the full load range.
LTC3719EG#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 36-SSOP (0.209", 5.30mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Applications:
- Controller, AMD Opteron™
- Voltage - Input:
- 4V ~ 36V
- Number of Outputs:
- 1
- Voltage - Output:
- 0.8V ~ 1.55V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 36-SSOP
LTC3719EG#TRPBF FAQ
1.How can I place an order for LTC3719EG#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3719EG#TRPBF 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 LTC3719EG#TRPBF reliable?
The price and inventory of LTC3719EG#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3719EG#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC3719EG#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3719EG#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3719EG#TRPBF?
LTC3719EG#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3719EG#TRPBF 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 LTC3719EG#TRPBF?
For technical support, including LTC3719EG#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3719EG#TRPBF requirements.
6.How does Aetrix verify that LTC3719EG#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC3719EG#TRPBF 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 LTC3719EG#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC3719EG#TRPBF?
All LTC3719EG#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3719EG#TRPBF, 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 LTC3719EG#TRPBF part is unused and in its original packaging.
Return procedure for LTC3719EG#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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