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Analog Devices Inc. LT7170RV-1#TRMPBF
- Part No.:
- LT7170RV-1#TRMPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 24-PowerTFQFN
- Datasheet:
-
LT7170RV-1#TRMPBF.pdf
- Description:
- IC REG BUCK PROG 20A 24LQFN
- Quantity:
- Payment:
- Shipping:
Inventory:491
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Product details
Overview
LT7170RV-1#TRMPBF from Analog Devices is a 20 A, 16 V, dual-phase synchronous step-down regulator with digital power system management via PMBus/I²C. It delivers up to 20 A continuous output current with programmable VOUT (0.4–5.5 V), switching frequency (400 kHz–4 MHz), and per-phase current limit (up to 12.5 A/phase). Its Silent Switcher® architecture enables low-EMI operation in compact designs for high-density server and storage power rails.
For engineers reviewing the LT7170RV-1#TRMPBF datasheet, LT7170RV-1#TRMPBF pinout, LT7170RV-1#TRMPBF application, or LT7170RV-1#TRMPBF equivalent, key selection considerations include its dual-phase valley-current-mode control, differential remote sensing, three-time programmable NVM, forced-continuous operation, and integrated telemetry for VOUT, IOUT, VIN, and die temperature.
Technical Context
The LT7170RV-1#TRMPBF implements controlled on-time valley current-mode control with 25 ns typical minimum on-time, enabling high fSW at low VOUT while maintaining fast transient response. Its dual-phase configuration operates with 180° phase shift between SW0 and SW1 outputs, reducing input/output ripple and improving thermal distribution.
It integrates a PMBus 1.3-compliant I²C interface supporting telemetry readback, programmable fault thresholds (VOUT UV/OV, VIN ON/OFF), soft-start/stop, sequencing, and loop compensation. Configuration is supported via external resistors or on-chip three-time programmable NVM with ECC.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VOUT Range | 0.4 V to 5.5 V - supports core, I/O, and auxiliary rails across ASIC/FPGA/GPU applications |
| Max Output Current | 20 A continuous - delivered via two synchronized 10 A-equivalent phases (LT7170-1 variant) |
| fSW Range | 400 kHz to 4 MHz - enables optimization of size vs. efficiency; programmable via resistor or PMBus |
| VOUT Accuracy | ±0.25% (0.6–1.375 V) - ensures tight regulation for voltage-sensitive processors and memory |
| Min On-Time | 25 ns typical - allows stable 0.4 V output at 4 MHz, critical for high-performance SoC core supplies |
| Telemetry Accuracy | READ_VOUT ±0.20% (0.6–1.375 V); READ_IOUT ±300 mA (≤10 A) - enables precise system-level power monitoring |
| Package | 24-lead LQFN (3.5 mm × 4 mm) - thermally enhanced for high-current operation with low θJC-BOTTOM = 4.0°C/W |
Pinout & Package
LT7170RV-1#TRMPBF is housed in a 24-lead, 3.5 mm × 4 mm, 0.5 mm pitch LQFN package with exposed thermal pad (EP). The package supports high-current routing and efficient heat dissipation via bottom-side thermal connection to PCB ground plane.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pins 1, 18) | Main input power supply inputs | Accepts 1.5–16 V (with EXTVCC) or 2.9–16 V; requires local 0.1 µF + bulk ≥10 µF bypassing per pin |
| SW0 (Pins 22, 23, 25) | Phase 0 switch node | Connects to Phase 0 inductor and BOOST0 capacitor; shared for single-phase LT7170, independent for LT7170-1 |
| SW1 (Pins 20, 21, 26) | Phase 1 switch node | Connects to Phase 1 inductor and BOOST1 capacitor; used only in dual-phase LT7170-1 configuration |
| VSENSEP / VSENSEN (Pins 15, 16) | Differential output voltage sense inputs | Enable remote sensing to reject PCB IR drop; required for ±0.25% VOUT accuracy at load |
| SYNC/PWM_CFG (Pin 4) | Configurable clock sync input or PWM config pin | Accepts 0.4–4 MHz external clock or sets fSW/phase/compensation via resistor to SGND/PGND |
| PGOOD (Pin 9) | Open-drain power-good indicator | Signals valid VOUT within programmable UV/OV fault thresholds; deglitched and configurable |
Key Features
| Feature | Design Value |
|---|---|
| Silent Switcher® architecture | Reduces radiated EMI by >30 dB vs. conventional buck regulators - eliminates need for metal shielding in CISPR Class B systems |
| Dual-phase valley current-mode control | Enables 20 A output with interleaved 180° switching - cuts input/output ripple by ~70%, easing capacitor selection |
| Three-time programmable NVM with ECC | Stores full configuration (VOUT, fSW, limits, telemetry settings) - supports field reprogramming without external EEPROM |
| Differential remote VOUT sensing | Compensates for PCB trace resistance up to 50 mΩ - maintains ±0.25% regulation accuracy at point-of-load |
| PMBus 1.3 telemetry & control | Real-time readback of VOUT, IOUT, VIN, die temperature, and faults - enables predictive maintenance and dynamic margining |
Applications
| Server CPU Core Supply | AI Accelerator Board Power |
|---|---|
|
Use Scenario: Delivering tightly regulated 0.8 V @ 16 A to high-performance x86 CPU cores under dynamic 0–12 A load transients. IC Role / Device Role / Timing Role: Dual-phase synchronous buck controller managing two parallel inductors with 180° phase shift and valley-current feedback. Use Value: 25 ns min on-time enables stable 0.8 V at 2 MHz; differential sensing maintains ±0.25% accuracy despite 200 mV IR drop across VRM layout. |
Use Scenario: Providing 1.2 V @ 18 A to GPU/AI ASIC on PCIe add-in card with strict EMI limits and thermal constraints. IC Role / Device Role / Timing Role: Digitally managed dual-phase regulator with PMBus telemetry for real-time thermal derating and fault logging. Use Value: Silent Switcher® design meets CISPR 32 Class B radiated emissions without shielding; NVM stores board-specific margins and sequencing. |
| Enterprise SSD Power Rail | Industrial FPGA I/O Bank Supply |
|
Use Scenario: Generating 3.3 V @ 8 A for NAND flash and controller ICs in NVMe SSDs with space-constrained M.2 form factor. IC Role / Device Role / Timing Role: Compact 3.5 mm × 4 mm LQFN step-down regulator with programmable soft-start and undervoltage lockout. Use Value: 4 MHz max fSW allows use of 0.22 µH inductors; EXTVCC support reduces quiescent current when VOUT ≥ 3 V. |
Use Scenario: Supplying 1.8 V @ 10 A to FPGA I/O banks requiring precise sequencing relative to core and auxiliary rails. IC Role / Device Role / Timing Role: PMBus-configurable regulator supporting event-based sequencing and programmable PGOOD assertion delay. Use Value: Three-time NVM stores multiple configurations (e.g., for different FPGA bitstreams); ALERT pin flags overtemperature during burst workloads. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-phase digital buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC7151S | Single-phase, 25 A monolithic buck; no dual-phase capability; higher peak current but no interleaving benefit | Better suited for space-constrained single-rail designs where 25 A from one inductor is acceptable | Select LTC7151S when board area is more critical than ripple reduction and thermal spreading |
| TPS546D24A | PMBus 1.3 compatible; 60 A max (dual-phase); uses D-CAP3 control instead of valley current mode; no Silent Switcher | Higher current capacity and faster transient response, but requires external EMI filtering for Class B compliance | Select TPS546D24A when >20 A is needed and system-level EMI mitigation is already implemented |
Compared with LTC7151S and TPS546D24A, the LT7170RV-1#TRMPBF uniquely combines dual-phase valley-current control, Silent Switcher® EMI suppression, and three-time programmable NVM in a 3.5 mm × 4 mm footprint-making it optimal for high-density, low-noise, digitally managed 20 A power rails where layout area and radiated emissions are critical constraints.
Availability
LT7170RV-1#TRMPBF is available at Aetrix Electronics and suitable for communications infrastructure, enterprise SSDs, and industrial FPGA power systems requiring stable component supply, long-term lifecycle assurance, and full PMBus configurability.
Supply support for LT7170RV-1#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, communications, and automotive markets.
The LT7170/LT7170-1 product line was designed specifically for high-current, digitally managed DC/DC conversion in data center, AI accelerator, and high-end storage applications-emphasizing low EMI, telemetry fidelity, and configuration flexibility without external components.
FAQ
What is the maximum output current capability of the LT7170RV-1#TRMPBF?
The LT7170RV-1#TRMPBF delivers up to 20 A of continuous output current using its dual-phase architecture, with each phase supporting up to 12.5 A (current-limit selection 3). This is achieved through interleaved 180° switching between SW0 and SW1 pins, reducing RMS input/output ripple and thermal stress compared to single-phase solutions. The LT7170RV-1#TRMPBF datasheet specifies this rating under full thermal management conditions with proper PCB layout.
Does the LT7170RV-1#TRMPBF support differential remote voltage sensing?
Yes, the LT7170RV-1#TRMPBF supports true differential remote sensing via dedicated VSENSEP (Pin 15) and VSENSEN (Pin 16) inputs. This feature compensates for IR drop across PCB traces and connectors, enabling ±0.25% VOUT accuracy at the load-even with up to 50 mΩ total sense path resistance. The LT7170RV-1#TRMPBF requires Kelvin connections to the load for full accuracy benefit.
How many times can the on-chip NVM be programmed on the LT7170RV-1#TRMPBF?
The LT7170RV-1#TRMPBF contains three-time programmable nonvolatile memory (NVM) with error-correcting code (ECC). Each STORE_USER_ALL command consumes one write cycle, and the device guarantees 10 years of data retention after programming. This NVM stores complete configuration-including VOUT, fSW, current limits, telemetry settings, and sequencing parameters-enabling standalone operation without external configuration components.
What is the minimum on-time specification for the LT7170RV-1#TRMPBF and why does it matter?
The LT7170RV-1#TRMPBF has a typical minimum on-time of 25 ns, which directly enables high-frequency operation at very low output voltages-for example, stable 0.4 V output at 4 MHz. This parameter determines the lowest achievable VOUT at a given fSW and input voltage. A short min on-time avoids pulse-skipping and maintains regulation during light loads, improving transient response and efficiency in high-performance SoC core supplies.
Can the LT7170RV-1#TRMPBF operate without an external clock source?
Yes, the LT7170RV-1#TRMPBF operates autonomously without an external clock. Its internal oscillator sets fSW based on the FREQUENCY_SWITCH command (initialized via SYNC/PWM_CFG resistor or NVM). External synchronization via the SYNC/PWM_CFG pin is optional and used only when phase alignment with a system master clock is required. In standalone mode, the LT7170RV-1#TRMPBF achieves full functionality including telemetry, fault reporting, and programmable loop compensation.
LT7170RV-1#TRMPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 24-PowerTFQFN
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Programmable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.9V
- Voltage - Input (Max):
- 16V
- Voltage - Output (Min/Fixed):
- 0.4V
- Voltage - Output (Max):
- 5.5V
- Current - Output:
- 20A
- Frequency - Switching:
- 400kHz ~ 4MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 24-LQFN (3.5x4)
LT7170RV-1#TRMPBF FAQ
1.How can I place an order for LT7170RV-1#TRMPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT7170RV-1#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-1#TRMPBF reliable?
The price and inventory of LT7170RV-1#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-1#TRMPBF is usually 5 days.
3.What payment methods are accepted for LT7170RV-1#TRMPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT7170RV-1#TRMPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT7170RV-1#TRMPBF?
LT7170RV-1#TRMPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT7170RV-1#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-1#TRMPBF?
For technical support, including LT7170RV-1#TRMPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT7170RV-1#TRMPBF requirements.
6.How does Aetrix verify that LT7170RV-1#TRMPBF is sourced from the original manufacturer or authorized distributors?
All LT7170RV-1#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-1#TRMPBF meets industry standards.
7.What is the process for return or replacement of LT7170RV-1#TRMPBF?
All LT7170RV-1#TRMPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT7170RV-1#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-1#TRMPBF part is unused and in its original packaging.
Return procedure for LT7170RV-1#TRMPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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