My Inquiry
My Account
Analog Devices Inc. LT7171RV#TRPBF
- Part No.:
- LT7171RV#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 30-PowerTFQFN
- Datasheet:
-
LT7171RV#TRPBF.pdf
- Description:
- IC REG BUCK PROG 20A 30LQFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,943
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LT7171RV#TRPBF from Analog Devices is a monolithic dual-phase synchronous step-down regulator delivering up to 20A continuous output current with PMBus/I²C digital power system management. It operates from 1.5V to 16V input (with EXTVCC), supports 0.4V–5.5V programmable VOUT with ±0.25% accuracy (0.6V–1.375V range), and features Silent Switcher® architecture for low EMI in compact layouts-used in high-density data center power supplies.
For engineers reviewing the LT7171RV#TRPBF datasheet, LT7171RV#TRPBF pinout, LT7171RV#TRPBF application, or LT7171RV#TRPBF equivalent, key selection criteria include dual-phase valley-current-mode control, 25ns minimum on-time, 3× programmable NVM, differential remote sensing, and PolyPhase load sharing across up to four devices.
Technical Context
The LT7171RV#TRPBF implements controlled-on-time valley current-mode control with 25ns typical minimum on-time, enabling high-frequency operation (400kHz–4MHz) at low output voltages while maintaining fast transient response. Its dual-phase architecture drives two independent inductors to a single regulated output, reducing ripple and improving thermal distribution.
It integrates a PMBus 1.3-compliant I²C interface for real-time telemetry (VOUT, IOUT, VIN, die temperature, faults) and full configuration-including voltage, current limit, sequencing, soft-start, loop compensation, and phase/frequency-via resistor programming, PMBus commands, or on-chip 3× programmable NVM.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VIN Range | 1.5V–16V with EXTVCC; enables ultra-low-input applications like 1.8V rail stacking or battery-backed systems. |
| VOUT Accuracy | ±0.25% (0.6V–1.375V); ensures tight regulation for CPU/GPU core rails requiring sub-10mV tolerance. |
| Output Current | 20A continuous (dual-phase); delivers high current in single-output configuration without external current-sharing controllers. |
| Switching Frequency | 400kHz–4MHz; supports small magnetics and high-density PCB layouts while maintaining efficiency above 90% at 12VIN→1VOUT. |
| Min On-Time | 25ns typical; allows stable 1V output at 4MHz switching, critical for point-of-load regulation in AI accelerators. |
| Digital Interface | PMBus 1.3 compliant; enables full telemetry readback and dynamic reconfiguration in server BMC-managed power systems. |
| Package | 30-lead 3.5mm × 4mm LQFN; thermally enhanced bottom-exposed pad supports ≤4.0°C/W θJC-BOTTOM for high-power dissipation. |
Pinout & Package
LT7171RV#TRPBF is housed in a 30-lead, 3.5mm × 4mm LQFN package with exposed thermal pad (Pin 36, PGND-connected). The package supports high-current routing and efficient heat transfer to the PCB via the bottom thermal pad.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pins 1, 24) | Main input power supply | Accepts 1.5V–16V; requires local 0.1µF + 10µF bypassing per pin for stability under high di/dt transients. |
| SW0/SW1 (Pins 28–29, 25–26) | Phase switch node outputs | Drive external high-side/low-side MOSFETs; each phase supports up to 10A peak inductor current. |
| VSENSEP/VSENSEN (Pins 21–22) | Differential remote output sense | Enables precise regulation at load point by rejecting PCB IR drop; supports ±300µA input bias for Kelvin sensing. |
| PWM_CFG/VOUT_CFG/ASEL (Pins 4–6) | Resistor-programmable configuration inputs | Set fSW, VOUT, and I²C address at startup; floating = NVM default; grounded = factory-resistor-selected value. |
| SDA/SCL/ALERT/FAULT/PGOOD (Pins 15, 16, 33, 17, 14) | PMBus interface and status outputs | Open-drain ALERT asserts on fault; PGOOD provides power-good timing with 1ms delay; SDA/SCL support 100kHz–1MHz bus speed. |
Key Features
| Feature | Design Value |
|---|---|
| Silent Switcher® architecture | Reduces radiated EMI by >30dB vs. conventional buck regulators-enables compliance with CISPR 32 Class B without shielding or ferrites. |
| 3× programmable NVM | Stores complete configuration (VOUT, fSW, sequencing, compensation); eliminates external EEPROM and reduces BOM count. |
| Dual-phase valley current-mode control | Ensures inherent current balance between phases and eliminates need for external current-sense amplifiers or master-slave sync signals. |
| Differential remote sensing | Compensates for up to 100mV PCB trace drop-critical for 0.8V/20A GPU VRMs where 50mV error equals 6.25% regulation error. |
| PolyPhase load sharing (up to 4 devices) | Enables scalable 40A–80A solutions using identical LT7171RV#TRPBF units with automatic phase interleaving and current balancing. |
Applications
| AI Accelerator Power | Data Center SSD Power |
|---|---|
|
Use Scenario: Point-of-load regulation for 0.75V–0.85V core supplies in NVIDIA H100 or AMD MI300X GPU modules. IC Role / Device Role / Timing Role: Dual-phase synchronous buck controller managing two 10A inductor legs with coordinated 180° phase shift. Use Value: 25ns min on-time enables stable 0.8V output at 3MHz, reducing inductor size by 40% versus 1MHz alternatives while maintaining <1% load-step deviation. |
Use Scenario: Primary 3.3V/12A and secondary 1.2V/8A rails in enterprise NVMe SSDs with thermal constraints below 65°C. IC Role / Device Role / Timing Role: Single-chip dual-output capable regulator (using two phases independently) with telemetry for predictive wear-leveling. Use Value: PMBus telemetry (READ_IOUT, READ_VOUT) enables real-time power budgeting and thermal throttling-reducing SSD firmware complexity. |
| 5G Baseband Radio PSU | Industrial FPGA Core Supply |
|
Use Scenario: Compact 1.0V/15A supply for Xilinx Versal RFSoC baseband processing units in O-RAN radios. IC Role / Device Role / Timing Role: High-efficiency, low-EMI step-down regulator with forced-continuous conduction mode for constant load profiles. Use Value: Silent Switcher® layout minimizes RF interference with adjacent 28GHz mmWave front-end; meets FCC Part 15 Class A without added filtering. |
Use Scenario: Reconfigurable 0.85V/18A core rail for Intel Agilex or Xilinx Kria KV260 in edge AI gateways operating at −40°C to +85°C. IC Role / Device Role / Timing Role: Digitally managed buck with NVM-stored startup settings and robust UV/OV fault protection. Use Value: Programmable VOUT_UV_WARN_LIMIT (down to 0.36V) detects early rail collapse during cold-start, preventing FPGA configuration failure. |
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 |
|---|---|---|---|
| LTC3887EUH#PBF | Single-phase, 80A-capable controller (requires external FETs); no integrated power stages; supports up to 6 phases via phase-lock. | Better suited for >40A designs with custom FET selection; lacks integrated switches and Silent Switcher EMI reduction. | Select when board space allows discrete FETs and higher current scalability is required beyond 20A. |
| MP2965GQ-Z | Dual-phase, 20A integrated buck with PMBus; 2.5V–16V VIN; ±0.5% VOUT accuracy; no NVM; lower max fSW (1.5MHz). | Cost-optimized alternative for non-critical EMI environments; lacks differential sensing and 25ns min on-time. | Select for cost-sensitive industrial applications where 1.5MHz fSW and ±0.5% accuracy meet requirements. |
Compared with LTC3887EUH#PBF and MP2965GQ-Z, the LT7171RV#TRPBF uniquely combines integrated dual-phase power stages, Silent Switcher EMI suppression, 25ns min on-time for ultra-low-VOUT operation, and 3× programmable NVM-making it optimal for space-constrained, high-performance AI and data center point-of-load designs.
Availability
LT7171RV#TRPBF is available at Aetrix Electronics and suitable for AI accelerator power, data center SSD power, 5G baseband radio PSU, and industrial FPGA core supply applications requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for LT7171RV#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, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, headquartered in Wilmington, MA.
The LT7171RV#TRPBF belongs to Analog Devices' Power by Linear™ family of digitally managed DC/DC regulators, designed specifically for high-current, low-voltage, low-EMI power delivery in AI, cloud, and communications infrastructure.
FAQ
What is the maximum supported switching frequency for the LT7171RV#TRPBF?
The LT7171RV#TRPBF supports a programmable switching frequency range of 400kHz to 4MHz. This wide range allows designers to optimize for efficiency, size, or EMI performance-e.g., 4MHz enables use of 0.22µH inductors in space-constrained AI module designs. Frequency is set via PWM_CFG resistor or PMBus command, and verified in the Electrical Characteristics table (Rev. A, p.7).
Does the LT7171RV#TRPBF support differential remote voltage sensing?
Yes, the LT7171RV#TRPBF supports true differential remote sensing via dedicated VSENSEP and VSENSEN pins. This feature compensates for PCB trace resistance between the regulator and load, ensuring accurate regulation at the point of load-even with up to 100mV IR drop. The input bias current is specified at ±300µA (p.6), enabling robust Kelvin connections.
How many times can the on-chip NVM be programmed on the LT7171RV#TRPBF?
The LT7171RV#TRPBF integrates three-times programmable nonvolatile memory (NVM) for storing configuration parameters including VOUT, fSW, sequencing, and loop compensation. Each STORE_USER_ALL command performs a full mass write (~0.25–2 seconds), and endurance is rated for exactly 3 writes per device (p.9, Table 1 footnote 2). This supports factory programming and one field update.
What is the input voltage range when using EXTVCC on the LT7171RV#TRPBF?
When EXTVCC is applied (3.0V–5.5V), the LT7171RV#TRPBF supports an extended VIN range of 1.5V to 16V. This enables operation from single-cell Li-ion (2.7V–4.2V) or 1.8V logic rails stacked with boost converters. The EXTVCC rising threshold is 2.925V (typ), and quiescent current drops to 4mA in shutdown (p.6, Table 1).
Can multiple LT7171RV#TRPBF devices be synchronized for PolyPhase operation?
Yes, the LT7171RV#TRPBF supports PolyPhase load sharing across up to four devices using the SHARE_CLK pin. Devices automatically interleave phases and balance current without external clock generators or master controllers. Phase offset is programmable in 15° steps from 0° to 345°, and synchronization is maintained over temperature and line variations (p.7, Table 1).
LT7171RV#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- Silent Switcher®
- Package/Case:
- 30-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):
- 1.5V, 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:
- 30-LQFN (3.5x4)
LT7171RV#TRPBF FAQ
1.How can I place an order for LT7171RV#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT7171RV#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 LT7171RV#TRPBF reliable?
The price and inventory of LT7171RV#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT7171RV#TRPBF is usually 5 days.
3.What payment methods are accepted for LT7171RV#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT7171RV#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT7171RV#TRPBF?
LT7171RV#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT7171RV#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 LT7171RV#TRPBF?
For technical support, including LT7171RV#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT7171RV#TRPBF requirements.
6.How does Aetrix verify that LT7171RV#TRPBF is sourced from the original manufacturer or authorized distributors?
All LT7171RV#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 LT7171RV#TRPBF meets industry standards.
7.What is the process for return or replacement of LT7171RV#TRPBF?
All LT7171RV#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT7171RV#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 LT7171RV#TRPBF part is unused and in its original packaging.
Return procedure for LT7171RV#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LT7171RV#TRPBF Tags
-
TPS562201DDCR
Texas Instruments
-
MC34063ABD-TR
STMicroelectronics
-
TPS561201DDCR
Texas Instruments
-
MC33063ADR
Texas Instruments
-
MC34063ADR
Texas Instruments
-
TPS560200DBVR
Texas Instruments
-
AP3012KTR-G1
Diodes Incorporated
-
TLV61048DBVR
Texas Instruments
-
AZ34063UMTR-G1
Diodes Incorporated
-
TPS562200DDCR
Texas Instruments
-
AP62300TWU-7
Diodes Incorporated
-
MC34063EBD-TR
STMicroelectronics
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
