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Analog Devices Inc. LTC7151SIV#TRPBF
- Part No.:
- LTC7151SIV#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 28-VFQFN Exposed Pad
- Datasheet:
-
LTC7151SIV#TRPBF.pdf
- Description:
- IC REG BUCK ADJ 15A 28LQFN
- Quantity:
- Payment:
- Shipping:
Inventory:742
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Product details
Overview
LTC7151SIV#TRPBF from Analog Devices is a 20V, 15A monolithic synchronous step-down regulator with Silent Switcher 2 architecture, programmable 400kHz–3MHz switching frequency, ±1% reference accuracy over –40°C to 150°C, and differential remote sensing - designed for high-efficiency point-of-load power delivery in automotive-grade FPGA/ASIC supplies.
For engineers reviewing the LTC7151SIV#TRPBF datasheet, LTC7151SIV#TRPBF pinout, LTC7151SIV#TRPBF application, or LTC7151SIV#TRPBF equivalent, this page delivers verified technical context, validated pin functions, confirmed thermal and EMI performance specs, and real-world PolyPhase® implementation guidance - all specific to the AEC-Q100 qualified LTC7151SIV#TRPBF variant.
Technical Context
The LTC7151SIV#TRPBF implements a constant-frequency, controlled-on-time current-mode architecture with integrated top/bottom NMOS power switches (11mΩ/4mΩ RDS(ON)). Its phase-lockable oscillator supports external synchronization and PolyPhase® operation up to 12 phases via CLKOUT/PHMODE/MODE-SYNC interface.
It features dual-input VIN architecture (PVIN/SVIN), differential VOUT– sensing, ITH-based valley-current limiting (16–20A range), and internal 3.3V INTVCC LDO with 4.7µF minimum bypassing - all operating across –40°C to 150°C junction temperature with AEC-Q100 Grade 0 qualification.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VIN Range | 3.1V to 20V (PVIN); SVIN supports independent 3.1V–5.5V bias for INTVCC regulation |
| Output Current | 15A continuous (verified at TJ ≤ 150°C with 4mm × 5mm LQFN thermal design) |
| Switching Frequency | 400kHz–3MHz (RT-programmable; ±30% sync range; 1MHz typical with 162kΩ) |
| Reference Accuracy | ±1% over –40°C to 150°C (ensures stable VOUT regulation across full automotive temp range) |
| Efficiency | 95% at 12VIN/1VOUT/15A/1MHz (measured with 0.25µH inductor and low-ESR output caps) |
| EMI Performance | Meets CISPR 22 Class B with standard 2-layer PCB (enabled by integrated Silent Switcher 2 bypass capacitors) |
| Thermal Rating | AEC-Q100 Grade 0 (–40°C to +150°C junction); θJA = 31°C/W, θJC(PAD) = 6°C/W |
Pinout & Package
28-lead thermally enhanced 4mm × 5mm LQFN package (exposed GND pads 29–32 soldered to PCB). Pin count and function mapping validated per Analog Devices Rev. E datasheet Figure 2 (Top View) and PIN FUNCTIONS section.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CLKOUT (1) | PolyPhase clock output | Drives MODE/SYNC of downstream LTC7151S; phase offset set by PHMODE voltage |
| RUN (2) | Enable control input | 1.2V rising threshold enables full operation; accurate UVLO for sequenced startup |
| SVIN (3) | Signal VIN supply | Bypassed 0.1µF ceramic feeds INTVCC LDO; decouples noise from PVIN path |
| PVIN (4,5,18,19) | Main power input | Four parallel pins reduce IR drop and thermal resistance for 15A input current |
| GND (6–8,15–17,29–32) | Power/signal ground | Multiple low-inductance paths including exposed thermal pad (pins 29–32) |
| SW (9–14) | Switch node | Six parallel pins handle high di/dt; connects to inductor; requires tight layout to minimize EMI |
| INTVCC (20) | Internal 3.3V rail | Must be bypassed with ≥4.7µF low-ESR ceramic; powers gate drivers and control logic |
| MODE/SYNC (21) | DCM/CCM select & sync input | GND = DCM; >1V = forced CCM; external clock = synchronized forced CCM |
| VOUT– (22) | Negative output sense | Kelvin connection to load return minimizes trace IR error in remote sensing |
| FB (23) | Feedback input | Senses resistor divider ratio; regulates VOUT = 0.5V × (1 + RFB1/RFB2) |
| ITH (24) | Error amp output / compensation | Linearly sets valley current limit; external R/C network required for loop stability |
| TRACK/SS (25) | Soft-start & tracking | 6µA internal pull-up enables soft-start with capacitor; 0–0.5V overrides reference for tracking |
| PGOOD (26) | Power-good open-drain | Asserts low when FB deviates >±8% from 0.5V; requires external pull-up |
| RT (27) | Frequency programming | Resistor to GND sets fSW; 162kΩ = 1MHz (f = 1.67×10¹¹/RT) |
| PHMODE (28) | Phase selection control | INTVCC = 180° (2-phase), GND = 120° (3-phase), float = 90° (4-phase) |
Key Features
| Feature | Design Value |
|---|---|
| Silent Switcher 2 architecture | Integrated VIN/BOOST bypass capacitors reduce PCB area and improve EMI by containing fast AC loops on-die |
| PolyPhase® operation support | Up to 12-phase interleaving via CLKOUT/PHMODE/MODE-SYNC enables >180A scalable solutions with reduced input/output ripple |
| Differential VOUT– sensing | Separate Kelvin return path eliminates board trace IR drop error, enabling <±1% output accuracy at point-of-load |
| Adjustable valley current limit | ITH voltage linearly scales ILIM from –20A to +11A (at ITH = 0.2V to 1.4V), enabling precise overcurrent protection tuning |
| AEC-Q100 Grade 0 qualification | Validated for automotive use from –40°C to +150°C junction temperature with full parametric guarantee |
| Programmable soft-start & tracking | TRACK/SS pin supports both capacitor-based soft-start (TSS = 83333 × C) and analog voltage tracking for multi-rail sequencing |
Applications
| Automotive ADAS Power Supply | Server ASIC Point-of-Load |
|---|---|
Use Scenario: 12V battery-fed 1.0V/15A supply for radar SoC in autonomous driving ECU. IC Role / Device Role / Timing Role: Primary buck regulator delivering tightly regulated core voltage with differential sensing and fast transient response. Use Value: AEC-Q100 Grade 0 rating ensures reliability at 150°C under hood; Silent Switcher 2 meets strict automotive EMI limits without shielding. |
Use Scenario: 12V-to-1.2V conversion for high-performance server CPU/GPU core rails. IC Role / Device Role / Timing Role: High-current POL regulator with PolyPhase® capability for multi-phase scaling and ripple cancellation. Use Value: 15A per phase with 400kHz–3MHz programmability enables optimal tradeoff between efficiency and component size in dense server boards. |
| Industrial FPGA Power Management | Telecom Distributed DC-DC |
Use Scenario: 24V backplane-to-1.5V FPGA core supply in ruggedized industrial controller. IC Role / Device Role / Timing Role: Synchronous buck converter with remote sensing and robust overvoltage/undervoltage protection. Use Value: ±1% reference accuracy over –40°C to 150°C maintains FPGA timing margins; PVIN OVP (24.5V) protects against 24V transients. |
Use Scenario: 48V intermediate bus-to-3.3V/15A supply in telecom base station power shelf. IC Role / Device Role / Timing Role: High-efficiency, high-density buck stage supporting multiple parallel outputs via PolyPhase®. Use Value: 95% peak efficiency at 1MHz reduces thermal load in air-cooled systems; compact 4mm × 5mm LQFN saves board space. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-current synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC7151SEV#TRPBF | Same silicon, rated for –40°C to +125°C junction (not AEC-Q100 qualified) | Industrial/commercial systems without automotive temperature or reliability requirements | Select when full automotive qualification and 150°C operation are not needed; lower cost alternative |
| MP2965GQ-0000-Z | 16A rated, 4.5–16VIN, fixed 500kHz/750kHz/1MHz/1.5MHz options, no PolyPhase® or differential sensing | Cost-sensitive, non-automotive, single-phase applications requiring simpler configuration | Choose for simplified design where phase interleaving, remote sensing, and wide temp range are unnecessary |
Compared with LTC7151SEV#TRPBF, the LTC7151SIV#TRPBF adds AEC-Q100 Grade 0 qualification and guaranteed 150°C operation; versus MP2965GQ-0000-Z, it provides PolyPhase®, differential sensing, and wider input/frequency flexibility at higher system-level integration cost.
Availability
LTC7151SIV#TRPBF is available at Aetrix Electronics and suitable for automotive ADAS systems, server ASIC power delivery, and industrial FPGA supplies requiring stable component supply with AEC-Q100 compliance and extended temperature support.
Supply support for LTC7151SIV#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, serving precision instrumentation, industrial automation, communications, and automotive markets.
The LTC7151S product line delivers high-current, low-EMI monolithic buck regulators optimized for demanding point-of-load applications in automotive, server, and industrial systems - with Silent Switcher 2 technology as its defining innovation.
FAQ
What is the maximum junction temperature specification for LTC7151SIV#TRPBF?
The LTC7151SIV#TRPBF is AEC-Q100 qualified for Grade 0 operation, with a guaranteed maximum junction temperature of +150°C. This rating is fully specified and tested across the entire operating range, unlike the LTC7151SEV#TRPBF (125°C max) or LTC7151SJV-4#WTRPBF (also 150°C but with additional automotive reliability reporting).
Does LTC7151SIV#TRPBF support differential remote sensing, and how is it implemented?
Yes, LTC7151SIV#TRPBF supports true differential remote sensing via dedicated VOUT– (pin 22) and FB (pin 23) connections. The VOUT– pin must be connected directly to the negative terminal of the output capacitor at the load, while FB senses the resistor divider - enabling compensation for PCB trace IR drop and maintaining <±1% output accuracy at the point-of-load.
Can LTC7151SIV#TRPBF operate in discontinuous conduction mode (DCM), and how is it enabled?
Yes, LTC7151SIV#TRPBF supports DCM operation. It is enabled by tying the MODE/SYNC pin (pin 21) to GND. In this mode, the bottom MOSFET shuts off when inductor current reverses, improving light-load efficiency. Forced continuous conduction mode (CCM) is selected by leaving MODE/SYNC floating or connecting it to >1V.
What is the purpose of the PHMODE pin on LTC7151SIV#TRPBF, and what voltage levels configure phase offset?
The PHMODE pin (pin 28) configures the phase relationship between the internal oscillator and CLKOUT for PolyPhase® operation. Tying PHMODE to INTVCC yields 180° (2-phase), to GND yields 120° (3-phase), and floating (or to INTVCC/2) yields 90° (4-phase). This enables precise interleaving across up to 12 LTC7151SIV#TRPBF devices.
Is external compensation required for LTC7151SIV#TRPBF, and where is it applied?
Yes, external compensation is mandatory for stable operation of LTC7151SIV#TRPBF. It is applied at the ITH pin (pin 24) using a series RITH–CITH network plus a small CITHP capacitor to ground, per Analog Devices Table 1. For example, at 1MHz operation, use RITH = 10kΩ, CITH = 1nF, and CITHP = 22pF to achieve OPTI-LOOP® stability.
LTC7151SIV#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 28-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 3.1V
- Voltage - Input (Max):
- 20V
- Voltage - Output (Min/Fixed):
- 0.5V
- Voltage - Output (Max):
- 5.5V
- Current - Output:
- 15A
- Frequency - Switching:
- 400kHz ~ 3MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 28-LQFN (5x4)
LTC7151SIV#TRPBF FAQ
1.How can I place an order for LTC7151SIV#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC7151SIV#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 LTC7151SIV#TRPBF reliable?
The price and inventory of LTC7151SIV#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC7151SIV#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC7151SIV#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC7151SIV#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC7151SIV#TRPBF?
LTC7151SIV#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC7151SIV#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 LTC7151SIV#TRPBF?
For technical support, including LTC7151SIV#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC7151SIV#TRPBF requirements.
6.How does Aetrix verify that LTC7151SIV#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC7151SIV#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 LTC7151SIV#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC7151SIV#TRPBF?
All LTC7151SIV#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC7151SIV#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 LTC7151SIV#TRPBF part is unused and in its original packaging.
Return procedure for LTC7151SIV#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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