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Analog Devices Inc. LT7182SRV#PBF
- Part No.:
- LT7182SRV#PBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 40-VFQFN Exposed Pad
- Datasheet:
-
LT7182SRV#PBF.pdf
- Description:
- IC REG BUCK ADJ 6A/6A DL 40LQFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,150
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Product details
Overview
LT7182SRV#PBF from Analog Devices is a dual-channel, 20V-input, 6A-per-channel monolithic PolyPhase synchronous step-down regulator with Silent Switcher 2 architecture, PMBus 1.3 interface, and integrated VIN bypass capacitors - delivering up to 95% efficiency at 1MHz (12VIN→3.3VOUT) for high-density power delivery in data center and SSD applications.
For engineers reviewing the LT7182SRV#PBF datasheet, LT7182SRV#PBF pinout, LT7182SRV#PBF application, or LT7182SRV#PBF equivalent, key selection considerations include its ±0.25% output voltage accuracy over temperature (0.6V–1.375V), 20ns minimum on-time, 40-lead LQFN package with exposed thermal pad, and support for up to 4MHz switching frequency with programmable phase alignment.
Technical Context
The LT7182SRV#PBF implements valley current mode control with 20ns typical minimum on-time, enabling stable operation down to 0.4V output at high switching frequencies. Its dual-channel architecture supports independent or synchronized operation, including PolyPhase load sharing across up to eight phases when cascaded.
It integrates a PMBus 1.3-compliant I²C interface with EEPROM-based fault logging, telemetry readback (VOUT, IOUT, VIN, die temperature), and digital soft-start/stop, sequencing, and loop compensation - all configurable via resistor pins or serial commands using LTpowerPlay®.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 6A continuous per channel; supports 8A peak per channel with proper layout and thermal management. |
| Input Voltage Range | 2.9V to 20V (or 1.5V with EXTVCC ≥3V); enables wide-system compatibility including intermediate bus and battery-backed rails. |
| Output Voltage Range | 0.4V to 5.5V (up to 0.85×VIN); supports core, I/O, and auxiliary rail generation with differential remote sensing. |
| Switching Frequency | 0.4MHz to 4MHz programmable; allows optimization of size vs. efficiency and EMI performance. |
| Output Accuracy | ±0.25% over temperature (0.6V–1.375V); ensures tight regulation for sensitive FPGA/CPU cores. |
| Min On-Time | 20ns typical; enables high-frequency, low-VOUT operation without pulse-skipping instability. |
| Package | 40-lead LQFN (5mm × 7mm × 0.9mm) with exposed thermal pad; θJA = 27°C/W for high-power density PCB integration. |
Pinout & Package
LT7182SRV#PBF is housed in a 40-lead LQFN package (5mm × 7mm × 0.9mm) with an exposed thermal pad (pins 41–44) requiring solder connection to PCB ground or thermal plane for optimal thermal performance (ΨJT = 0.28°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VSENSE0P / VSENSE1P (Pins 2, 11) | Differential output voltage sense inputs | Enable accurate remote sensing to reject PCB IR drop; required for ±0.25% regulation accuracy. |
| VSENSE0N / VSENSE1N (Pins 1, 12) | Differential output voltage sense returns | Must connect to local output ground near load; forms Kelvin sense pair with corresponding VSENSEP pins. |
| ITH0 / ITH1 (Pins 4, 5) | Error amplifier output & compensation nodes | Support external RC compensation or internal compensation (tie to INTVCC) for loop stability tuning. |
| PGND (Pins 14, 19, 34, 39, 42–43) | Power ground return | Low-impedance path for input/output capacitor grounds and switch node return; critical for EMI and thermal performance. |
| SW0 / SW1 (Pins 35, 36, 44) | High-side/low-side switch node outputs | Connect directly to inductors and BOOST capacitors; must be minimized in area to reduce radiated EMI. |
| BOOST0 / BOOST1 (Pins 13, 37) | Floating gate driver supplies | Require 0.1µF ceramic capacitors from BOOSTx to respective SWx; enable efficient high-side FET drive. |
Key Features
| Feature | Design Value |
|---|---|
| Silent Switcher 2 architecture | Integrated VIN bypass capacitors + symmetrical layout minimize EMI emissions without shielding or ferrites. |
| Dual-channel PolyPhase capability | Enables interleaved operation for reduced input/output ripple and scalable current up to 8A per channel. |
| PMBus 1.3 + EEPROM telemetry | Real-time readback of VOUT/IOUT/VIN/die temp + fault event logging with 10,000-cycle endurance and 10-year retention. |
| Resistor-programmable configuration | VOUT, device address, and phase offset set without programming - supports "power-on-and-run" deployment. |
| Controlled on-time valley current mode | Delivers fast transient response and stable light-load operation across full VIN/VOUT range and frequency. |
Applications
| Server CPU Core Power | Enterprise SSD Power |
|---|---|
Use Scenario: Delivering tightly regulated 0.8V–1.2V at up to 8A to multi-core CPUs in 1U rack servers with strict thermal and EMI constraints. IC Role / Device Role / Timing Role: Dual-channel synchronous buck controller managing dynamic load transients while maintaining <1% output deviation. Use Value: 20ns min on-time and valley current mode ensure sub-100ns response to 3A→6A load steps without overshoot. |
Use Scenario: Generating 1.2V, 1.8V, and 3.3V rails for NAND flash controllers, DRAM buffers, and PCIe PHYs in NVMe SSDs. IC Role / Device Role / Timing Role: Single-package dual-output regulator replacing two discrete converters to save board space and simplify BOM. Use Value: Differential remote sensing maintains ±0.25% accuracy despite PCB trace resistance between converter and memory ICs. |
| Communications Baseband | Industrial FPGA Power |
Use Scenario: Supplying clean, low-noise 1.0V and 1.8V to RF SoCs and ADC/DAC signal chains in 5G macro base stations. IC Role / Device Role / Timing Role: Silent Switcher 2 regulator providing EMI-robust power without compromising adjacent RF front-end sensitivity. Use Value: Integrated VIN bypass caps and optimized layout reduce conducted EMI by >30dB compared to standard QFN buck regulators. |
Use Scenario: Powering Xilinx/Kintex Ultrascale+ FPGAs requiring multiple precision rails (0.85V core, 1.2V AUX, 1.8V I/O) in harsh industrial environments. IC Role / Device Role / Timing Role: Digital power system manager enabling remote monitoring, sequencing, and fault recovery via PMBus. Use Value: EEPROM-stored fault logs and real-time telemetry allow predictive maintenance and field failure root-cause analysis. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-channel polyphase buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MP2965GQ-Z (Monolithic Power) | 4.5V–16V input, 5A/channel, no integrated VIN caps, I²C but not PMBus 1.3 compliant. | Lacks telemetry logging and high-accuracy low-VOUT mode; suitable for cost-sensitive non-datacenter apps. | Prefer LT7182SRV#PBF where EMI, accuracy, or digital monitoring are critical; MP2965GQ-Z offers lower BOM cost in less demanding systems. |
| TPS546D24RQFT (Texas Instruments) | 4.5V–18V input, 6A/channel, PMBus 1.3, but no Silent Switcher architecture or integrated VIN caps. | Higher EMI requires external filtering; lacks differential sensing on both channels and 20ns min on-time. | Choose LT7182SRV#PBF for compact, low-EMI designs needing remote sensing and ultrafast transient response; TPS546D24RQFT fits TI-ecosystem designs with existing PMBus infrastructure. |
Compared with MP2965GQ-Z and TPS546D24RQFT, the LT7182SRV#PBF uniquely combines Silent Switcher 2 EMI reduction, ±0.25% low-VOUT accuracy, and integrated VIN bypass capacitors - making it optimal for space-constrained, noise-sensitive, high-reliability power delivery where board-level filtering and layout complexity must be minimized.
Availability
LT7182SRV#PBF is available at Aetrix Electronics and suitable for data center server power, enterprise SSDs, and 5G baseband equipment requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for LT7182SRV#PBF 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, communications, and power management markets.
The LT7182SRV#PBF belongs to the Silent Switcher 2 DC/DC regulator product line, designed specifically for high-efficiency, low-EMI, digitally managed power delivery in next-generation computing and storage systems.
FAQ
What is the maximum supported switching frequency for the LT7182SRV#PBF?
The LT7182SRV#PBF supports a programmable switching frequency range of 0.4MHz to 4MHz. This is confirmed in the Electrical Characteristics table (Rev. A, p.5), where "Switching Frequency Programming Range" is specified as 0.4–4MHz, with ±7.5% set-point accuracy across temperature. The LT7182SRV#PBF achieves this using its internal oscillator and SYNC/PWM_CFG pin, enabling precise synchronization in multi-phase systems.
Does the LT7182SRV#PBF support differential remote voltage sensing on both channels?
Yes, the LT7182SRV#PBF supports true differential remote sensing on both channels via dedicated VSENSE0P/VSENSE0N and VSENSE1P/VSENSE1N pin pairs (Pin Functions, Rev. A, p.11). This design enables ±0.25% output voltage accuracy over temperature for 0.6V–1.375V outputs, compensating for PCB trace IR drop - a capability explicitly verified in the Electrical Characteristics section under "VOUT Set Point Accuracy".
Can the LT7182SRV#PBF operate without firmware programming?
Yes, the LT7182SRV#PBF supports full "power-on-and-run" operation using resistor configuration pins: VOUT0_CFG, VOUT1_CFG/POLYPHASE_CFG, and ASEL (Applications Information, Rev. A, pp.20–21). These pins set output voltage, phase offset, and PMBus address at startup without requiring I²C communication - a feature validated in the Pin Functions and Typical Applications sections of the datasheet.
What thermal performance can be expected from the LT7182SRV#PBF in a standard 4-layer PCB?
In a demo board configuration (still air, PVIN=12V, VOUT=0.8V, 1–2MHz), the LT7182SRV#PBF exhibits a junction temperature rise of ~35°C at 6A per channel (Typical Performance Characteristics, Rev. A, Fig G13). Its 40-lead LQFN package has θJA = 27°C/W and ΨJT = 0.28°C/W, and the exposed thermal pad (pins 41–44) must be soldered to a PCB thermal plane to achieve these ratings - as specified in the Package Description (p.37).
Is the LT7182SRV#PBF pin-compatible with earlier LT7182 variants like the LT7182R?
No - the LT7182SRV#PBF is not pin-compatible with the LT7182R. While both share the same 40-lead LQFN footprint, the LT7182SRV#PBF introduces updated pin functions including VOUT1_CFG/POLYPHASE_CFG (Pin 9) and revised BOOST/SW routing per the Pin Configuration diagram (Rev. A, p.3). The datasheet does not list LT7182R as a drop-in replacement, and pin mapping differences preclude direct substitution without layout revision.
LT7182SRV#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- Silent Switcher®2
- Package/Case:
- 40-VFQFN Exposed Pad
- Packaging:
- Tray
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 2
- Voltage - Input (Min):
- 1.5V
- Voltage - Input (Max):
- 20V
- Voltage - Output (Min/Fixed):
- 0.4V
- Voltage - Output (Max):
- 17V
- Current - Output:
- 6A, 6A
- Frequency - Switching:
- 400kHz ~ 4MHz
- Synchronous Rectifier:
- -
- Operating Temperature:
- -40°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 40-LQFN (7x5)
LT7182SRV#PBF FAQ
1.How can I place an order for LT7182SRV#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT7182SRV#PBF 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 LT7182SRV#PBF reliable?
The price and inventory of LT7182SRV#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT7182SRV#PBF is usually 5 days.
3.What payment methods are accepted for LT7182SRV#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT7182SRV#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT7182SRV#PBF?
LT7182SRV#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT7182SRV#PBF 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 LT7182SRV#PBF?
For technical support, including LT7182SRV#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT7182SRV#PBF requirements.
6.How does Aetrix verify that LT7182SRV#PBF is sourced from the original manufacturer or authorized distributors?
All LT7182SRV#PBF 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 LT7182SRV#PBF meets industry standards.
7.What is the process for return or replacement of LT7182SRV#PBF?
All LT7182SRV#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LT7182SRV#PBF, 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 LT7182SRV#PBF part is unused and in its original packaging.
Return procedure for LT7182SRV#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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