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Analog Devices Inc. LT7170RV#TRMPBF
- Part No.:
- LT7170RV#TRMPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- -
- Datasheet:
-
LT7170RV#TRMPBF.pdf
- Description:
- 16V 20A Single/Dual Phase Monlit
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Product details
Overview
LT7170RV#TRMPBF from Analog Devices is a monolithic, dual-phase, synchronous step-down regulator delivering up to 20 A continuous output current with 16 V max input voltage, ±0.25% VOUT accuracy (0.6–1.375 V), differential remote sensing, and PMBus/I²C digital power system management - used in high-density server VRMs and solid-state drive power rails.
For engineers reviewing the LT7170RV#TRMPBF datasheet, LT7170RV#TRMPBF pinout, LT7170RV#TRMPBF application, or LT7170RV#TRMPBF equivalent, this page delivers verified electrical specs, validated pin functions, confirmed dual-phase topology behavior, real-world EMI performance data, and direct alternative part comparisons for power system design and qualification.
Technical Context
The LT7170RV#TRMPBF implements controlled on-time valley current-mode control with 25 ns typical minimum on-time, enabling stable 4 MHz switching at low VOUT while maintaining fast transient response. Its dual-phase architecture operates with 180° phase shift between SW0 and SW1 outputs, reducing input/output ripple and improving thermal distribution.
It integrates three-times programmable NVM with ECC, supports resistor-based or PMBus configuration of VOUT (0.4–5.5 V), fSW (400 kHz–4 MHz), current limit (4.5–12.5 A per phase), and loop compensation - all while maintaining Silent Switcher® EMI suppression via symmetrical layout and integrated boost capacitors (BOOST0/BOOST1).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VIN Range | 1.5 V to 16 V (with EXTVCC ≥3 V); enables ultra-low-input operation in battery-backed or intermediate bus systems. |
| VOUT Accuracy | ±0.25% (0.6–1.375 V); ensures tight regulation for core logic and memory supplies requiring sub-10 mV tolerance. |
| Max Output Current | 20 A continuous (dual-phase LT7170-1 configuration); supports high-current ASIC/FPGA rails without external current sharing. |
| fSW Range | 400 kHz to 4 MHz; allows optimization of size (high fSW) vs. efficiency (low fSW) across diverse PCB area constraints. |
| Min On-Time | 25 ns typical; enables 1.0 V @ 4 MHz or 0.6 V @ 2 MHz operation without pulse-skipping, preserving transient fidelity. |
| Telemetry Accuracy | READ_VOUT ±0.20%, READ_IOUT ±300 mA (≤10 A); provides reliable closed-loop monitoring for dynamic load management. |
| EMI Architecture | Silent Switcher® with integrated BOOST0/BOOST1 and symmetrical SW0/SW1 routing; meets CISPR 32 Class B radiated limits without shielding. |
Pinout & Package
LT7170RV#TRMPBF is housed in a 24-lead, 3.5 mm × 4 mm LQFN package with exposed thermal pad (EP). Pin layout supports dual-phase interleaving, differential sensing, and dedicated power-good/alert signaling - optimized for low-inductance, high-current PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pins 1, 18) | Main input power supply inputs | Split VIN pins reduce high-frequency input current loop area; each requires local 0.1 µF + bulk 10 µF ceramic decoupling to PGND. |
| PGND (Pins 2, 17, 27–29) | Power ground return path | Multiple low-impedance PGND pins minimize ground bounce and improve thermal conduction to PCB copper pour. |
| SW0 (Pins 22, 23, 25) | Phase 0 switch node output | Three parallel SW0 pins reduce conduction loss and parasitic inductance; must connect directly to Phase 0 inductor and BOOST0. |
| SW1 (Pins 20, 21, 26) | Phase 1 switch node output | Three parallel SW1 pins enable interleaved dual-phase operation; tied together only in single-phase LT7170 mode. |
| VSENSEP / VSENSEN (Pins 15, 16) | Differential output voltage sense inputs | Enables Kelvin sensing at load point; rejects PCB IR drop to maintain ±0.25% regulation accuracy under dynamic load. |
| SYNC/PWM_CFG (Pin 4) | Configurable clock sync input or PWM config pin | Accepts external 400 kHz–4 MHz clock or hosts 1% resistor to set fSW, phase, and compensation - read at startup/reset. |
| PGOOD (Pin 9) | Open-drain power-good indicator | Asserts low during VOUT fault, disable, or sequencing; deglitched with configurable timer for robust system power sequencing. |
| ALERT (Pin 7) | Open-drain fault/warning flag | Signals overtemperature, overcurrent, communication error, or UV/OV events - enables centralized system-level fault logging. |
Key Features
| Feature | Design Value |
|---|---|
| Silent Switcher® architecture | Integrated symmetric layout and internal boost caps (BOOST0/BOOST1) suppress radiated EMI to CISPR 32 Class B without ferrites or shields. |
| Dual-phase interleaving (LT7170-1) | 180° phase shift between SW0 and SW1 reduces input/output ripple by ~2× and spreads thermal load across two phases. |
| Three-times programmable NVM with ECC | Stores full configuration (VOUT, fSW, limits, compensation); retains settings for 10 years; prevents corruption during field updates. |
| PMBus 1.3-compliant telemetry | Real-time readback of VOUT, IOUT, VIN, die temperature, and frequency with ±0.2% VOUT and ±300 mA IOUT DC accuracy. |
| Programmable current limit per phase | Four selectable ILIM_POS ranges (4.5–12.5 A/phase); enables precise overcurrent protection matched to inductor saturation. |
| Controlled on-time valley current mode | 25 ns min on-time + 110 ns min off-time enables stable 4 MHz operation at 0.6 V; eliminates subharmonic oscillation without slope compensation. |
Applications
| Server VRM | SSD Power Rail |
|---|---|
Use Scenario: Regulating 1.0 V/15 A core voltage for PCIe Gen5 SSD controllers under bursty 0–12 A load transients. IC Role / Device Role / Timing Role: Dual-phase synchronous buck controller managing interleaved SW0/SW1 switching with 180° phase offset and differential VSENSE feedback. Use Value: 25 ns min on-time sustains 4 MHz switching at 1.0 V, minimizing output capacitance; Silent Switcher® meets Class B EMI without shielded inductors. |
Use Scenario: Providing 3.3 V/8 A auxiliary power to NAND flash and DRAM buffers in enterprise NVMe SSDs. IC Role / Device Role / Timing Role: Single-regulated output buck converter using LT7170RV#TRMPBF in dual-phase mode with programmable soft-start and sequencing. Use Value: ±0.25% VOUT accuracy and telemetry-readback of IOUT ensure stable NAND programming voltage; NVM stores calibrated settings across production units. |
| Communications PSU | Industrial FPGA Core Supply |
Use Scenario: Generating 0.85 V/18 A for 5G baseband processor cores with strict <10 mV droop under 10 A/µs load steps. IC Role / Device Role / Timing Role: High-bandwidth valley current-mode regulator with fast transient response, enabled by 25 ns min on-time and programmable loop compensation. Use Value: Differential remote sensing rejects PCB trace resistance; telemetry enables real-time thermal derating based on die temperature readback. |
Use Scenario: Delivering 1.2 V/16 A to Xilinx Versal ACAP fabric with programmable sequencing relative to auxiliary 1.8 V and 0.85 V rails. IC Role / Device Role / Timing Role: Digital power system manager supporting event-based sequencing, PGOOD coordination, and fault masking via PMBus commands. Use Value: Three-programmable NVM allows field-updatable configurations; ALERT pin flags overtemperature before thermal shutdown, enabling graceful FPGA throttling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-current, digitally managed buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC3887EUH#PBF | Single-phase, 80 A capable (multiphase controller); no integrated MOSFETs; requires external power stages. | Used where scalability > integration - e.g., multi-rail telecom rectifiers needing >20 A per rail with custom FET selection. | Select when board space permits discrete FETs and higher peak current (>20 A) or multiphase expansion is required. |
| TPS546D24RQFT | Single-chip 60 A solution (4-phase); TI's D-CAP3 control; no PMBus telemetry; only SMBus-compatible readback. | Targeted at cost-sensitive industrial PLCs where full PMBus compliance and NVM programmability are not mandatory. | Choose for simpler firmware integration and lower BOM count where telemetry depth and field reconfiguration are secondary. |
Compared with LTC3887EUH#PBF and TPS546D24RQFT, the LT7170RV#TRMPBF uniquely combines monolithic 20 A dual-phase integration, Silent Switcher® EMI performance, three-times programmable NVM, and full PMBus 1.3 telemetry - making it optimal for space-constrained, high-reliability applications demanding both precision regulation and system-level observability.
Availability
LT7170RV#TRMPBF is available at Aetrix Electronics and suitable for server VRMs, SSD power rails, and 5G communications power supplies requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.
Supply support for LT7170RV#TRMPBF 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 is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving precision instrumentation, industrial automation, and communications markets since 1965.
The LT7170RV#TRMPBF belongs to Analog Devices' Power by Linear™ family of high-efficiency, digitally managed DC/DC regulators - designed specifically for high-density, low-EMI power delivery in data center, storage, and infrastructure equipment.
FAQ
What is the difference between LT7170RV#TRMPBF and LT7170-1?
The LT7170RV#TRMPBF is the specific orderable variant of the LT7170-1 dual-phase regulator. Per the datasheet Rev. A ordering guide, "RV" denotes the 24-lead LQFN package with exposed pad, and "#TRMPBF" indicates tape-and-reel packaging with lead-free finish. It implements the LT7170-1's dual-phase functionality - two independent switch nodes (SW0/SW1), 180° interleaving, and per-phase current limiting - unlike the single-phase LT7170.
Does LT7170RV#TRMPBF support differential remote sensing?
Yes, LT7170RV#TRMPBF supports true differential remote sensing via dedicated VSENSEP (Pin 15) and VSENSEN (Pin 16) inputs. This allows Kelvin connection directly at the load to reject PCB trace resistance, ensuring ±0.25% VOUT accuracy is maintained even under high dynamic load currents - a critical feature for CPU, GPU, and FPGA core rails.
Can LT7170RV#TRMPBF operate without PMBus communication?
Yes, LT7170RV#TRMPBF supports fully standalone operation. Key parameters - including VOUT, fSW, current limit, and loop compensation - can be set via external 1% resistors on VOUT_CFG and SYNC/PWM_CFG pins. The device reads these at startup and reset, eliminating dependency on PMBus for basic functionality while retaining telemetry and reconfiguration capability when needed.
What is the thermal performance of LT7170RV#TRMPBF in a standard PCB layout?
Per the datasheet's Table 4, LT7170RV#TRMPBF achieves θJA = 21.5°C/W in still air on the demo board. Its 4 mm × 3.5 mm LQFN package features an exposed thermal pad that must be soldered to a minimum 200 mm² copper pour with ≥4 thermal vias to internal ground planes. With proper layout, it sustains 20 A continuous output at 1.0 V with ≤35°C junction rise above ambient.
How does LT7170RV#TRMPBF handle output short-circuit protection?
LT7170RV#TRMPBF uses valley current-mode control with programmable negative inductor current limit (ILIM_NEG) to detect sinking current during short-circuit conditions. When ILIM_NEG is exceeded (e.g., −3.0 A to −12.5 A per phase, depending on selection), the device triggers an overcurrent fault, pulls PGOOD low, asserts ALERT, and enters a configurable response - either retry after delay or latch-off - per PMBus MFR_FAULT_RESP command settings.
LT7170RV#TRMPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- -
- Output Configuration:
- -
- Topology:
- -
- Output Type:
- -
- Number of Outputs:
- -
- Voltage - Input (Min):
- -
- Voltage - Input (Max):
- -
- Voltage - Output (Min/Fixed):
- -
- Voltage - Output (Max):
- -
- Current - Output:
- -
- Frequency - Switching:
- -
- Synchronous Rectifier:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
LT7170RV#TRMPBF FAQ
1.How can I place an order for LT7170RV#TRMPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT7170RV#TRMPBF 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 LT7170RV#TRMPBF reliable?
The price and inventory of LT7170RV#TRMPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT7170RV#TRMPBF is usually 5 days.
3.What payment methods are accepted for LT7170RV#TRMPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT7170RV#TRMPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT7170RV#TRMPBF?
LT7170RV#TRMPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT7170RV#TRMPBF 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 LT7170RV#TRMPBF?
For technical support, including LT7170RV#TRMPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT7170RV#TRMPBF requirements.
6.How does Aetrix verify that LT7170RV#TRMPBF is sourced from the original manufacturer or authorized distributors?
All LT7170RV#TRMPBF 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 LT7170RV#TRMPBF meets industry standards.
7.What is the process for return or replacement of LT7170RV#TRMPBF?
All LT7170RV#TRMPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT7170RV#TRMPBF, 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 LT7170RV#TRMPBF part is unused and in its original packaging.
Return procedure for LT7170RV#TRMPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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