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Texas Instruments LP87565VRNFRQ1
- Part No.:
- LP87565VRNFRQ1
- Manufacturer:
- Texas Instruments
- Package:
- 26-PowerVFQFN
- Datasheet:
-
LP87565VRNFRQ1.pdf
- Description:
- IC REG BUCK ADJ 16A DL 26VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,000
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Product details
Overview
LP87565VRNFRQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive buck converter IC configured as two independent 2-phase DC/DC outputs, delivering up to 8 A per output (16 A total), with programmable 0.6–3.36 V output voltage, 2 MHz switching frequency, and I²C-controlled slew-rate (0.47–10 mV/µs). It powers high-performance infotainment SoCs and ADAS domain controllers requiring tightly regulated, low-noise, multi-rail power.
For engineers reviewing the LP87565VRNFRQ1 datasheet, LP87565VRNFRQ1 pinout, LP87565VRNFRQ1 application, or LP87565VRNFRQ1 equivalent, key selection criteria include its dual 2-phase topology, integrated current sensing without external resistors, remote differential voltage sensing for point-of-load accuracy, and automotive-grade thermal warning/shutdown thresholds (125°C warn, 150°C shutdown).
Technical Context
The LP87565VRNFRQ1 implements four synchronous buck cores arranged exclusively as two independent 2-phase outputs-enabling higher current capability and lower ripple per rail versus single-phase configurations. Each 2-phase output supports automatic phase shedding (down to 1-phase) and adding based on load current thresholds (e.g., 0.7 A shed, 1 A add), maintaining peak efficiency across wide load ranges.
Its I²C interface supports Standard (100 kHz), Fast (400 kHz), Fast+ (1 MHz), and High-Speed (3.4 MHz) modes, enabling dynamic voltage scaling and real-time telemetry (load current, temperature, PGOOD status). The device integrates a PLL for clock synchronization and spread-spectrum modulation to reduce EMI in sensitive automotive environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Configuration | Two independent 2-phase buck outputs (not 4-phase, 3+1, or 4×1); enables dual high-current rails with interleaved ripple cancellation. |
| Max Output Current | 8 A per 2-phase output (16 A total); limited by thermal design and input voltage (≥3 V required for full rating). |
| Input Voltage Range | 2.8 V to 5.5 V; compatible with automotive battery-supplied 3.3 V or 5 V intermediate rails. |
| Output Voltage Range | 0.6 V to 3.36 V in programmable steps (10 mV below 0.73 V, 5 mV up to 1.4 V, 20 mV above); supports core, I/O, and memory rail requirements. |
| Switching Frequency | 1.8–2.2 MHz (typ. 2 MHz); enables use of compact 0.47 µH inductors and reduces output capacitor size. |
| Efficiency Peak | 90% at 4 A/phase (8 A per 2-phase rail) with 3.7 V input / 1.8 V output; achieved via low RDS(on) HS (29–65 mΩ) and LS (17–35 mΩ) FETs. |
| I²C Speed Support | Up to 3.4 MHz (High-Speed mode); allows rapid register access for dynamic voltage/frequency scaling in processor power management. |
Pinout & Package
VQFN-HR (RNF) 26-pin package, 4.50 mm × 4.00 mm body, with exposed thermal pad. Designed for automotive PCB layouts requiring high thermal reliability and low EMI.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SW_B0, SW_B1 | Buck0 and Buck1 switch nodes | Connect to respective 0.47 µH inductors; require tight layout to minimize switching loop area and EMI. |
| FB_B0, FB_B1 | Positive feedback for Buck0/Buck1 | Remote sense points for differential voltage regulation; must be routed directly to load for IR-drop compensation. |
| VIN_B0, VIN_B1 | Independent input supplies for Buck0/Buck1 | Not internally connected-must be externally tied together and locally bypassed with ≥1.9 µF ceramic capacitors. |
| EN1, EN2, EN3 | Configurable enable/GPIO pins | Control startup sequencing of internal regulators or external devices (e.g., PMIC reset, load switches). |
| SCL, SDA | I²C serial interface | Support 3.4 MHz operation; require pull-up resistors (10 kΩ typical) to VANA (3.3 V). |
| PGOOD | Open-drain power-good indicator | Asserts after soft-start and voltage stabilization; monitors ±14 mV window around final VOUT for rail integrity. |
| NRST | Active-low device reset | Asynchronous reset input; internal 650–1700 kΩ pulldown ensures defined state during power-up. |
Key Features
| Feature | Design Value |
|---|---|
| Automotive qualification | AEC-Q100 Grade 1 (−40°C to +125°C ambient), HBM ±2 kV, CDM ±500 V-validated for under-hood and cockpit applications. |
| Integrated current measurement | 20.47 A full-scale range, 20 mA LSB resolution, <10% accuracy above 1 A-eliminates need for external sense resistors and associated board space/power loss. |
| Programmable slew rate | 0.47–10 mV/µs (7 settings), with hardware-enforced limits based on output capacitance-prevents overshoot during dynamic voltage scaling and controls inrush current. |
| Thermal protection | Dual-level monitoring: die temperature warning at 125°C (configurable), shutdown at 150°C with 20°C hysteresis-ensures safe operation under sustained overload or poor airflow. |
| Phase interleaving & auto scaling | Automatic phase shedding (e.g., 2→1 phase at 0.7 A) and adding (1→2 at 1 A) per 2-phase rail-maintains >85% efficiency from 100 mA to full load. |
Applications
| Infotainment Application Processor Power | ADAS Radar Signal Processor Rail |
|---|---|
|
Use Scenario: Powers quad-core ARM Cortex-A72-based infotainment SoC with dynamic DVFS demands across CPU, GPU, and memory subsystems. IC Role / Device Role / Timing Role: Dual 2-phase buck regulator providing independent 0.8 V (core) and 1.1 V (GPU) rails with synchronized soft-start and slew-controlled transitions. Use Value: Enables sub-10 µs voltage transitions without overshoot, reducing SoC boot time and supporting real-time OS scheduling requirements. |
Use Scenario: Supplies clean, low-noise 1.2 V power to 77 GHz radar DSP with strict <±15 mV ripple tolerance over temperature. IC Role / Device Role / Timing Role: One 2-phase output delivers 8 A with remote differential sensing and spread-spectrum switching to suppress EMI coupling into RF front-end. Use Value: Achieves 3 mVp-p ripple in PWM mode-meets radar ADC reference stability requirements and avoids false object detection. |
| Automotive Digital Cluster Display SoC | Camera ISP and Image Sensor Interface |
|
Use Scenario: Powers Tegra-based digital instrument cluster SoC requiring multiple tightly regulated rails (0.9 V core, 1.8 V I/O, 3.3 V interface). IC Role / Device Role / Timing Role: Two 2-phase outputs configured as 0.9 V/8 A (core) and 1.8 V/8 A (I/O), sequenced via EN1/EN2 GPIOs with programmable delays. Use Value: Eliminates need for discrete sequencing IC; supports fail-safe shutdown via nINT interrupt on overtemperature or PGOOD fault. |
Use Scenario: Delivers 1.2 V/4 A and 2.8 V/2 A to image signal processor and CIS interface logic in surround-view camera module. IC Role / Device Role / Timing Role: Uses one 2-phase rail for 1.2 V (ISP core) and second 2-phase rail split into two 1-phase outputs (2.8 V + auxiliary 1.8 V) via configuration registers. Use Value: Reduces BOM count by 3 external regulators; integrated OVP/UVP protects sensitive CIS pixels from supply transients. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar multi-phase buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LP87562VRNFRQ1 | Configured as one 3-phase + one 1-phase output (12 A + 4 A); different phase allocation and current sharing behavior. | Preferred for asymmetric loads (e.g., main SoC + auxiliary MCU), not dual symmetric high-current rails. | Select LP87562VRNFRQ1 only when system requires unequal rail current distribution and cannot tolerate dual 2-phase topology constraints. |
| TPS65917B1RSLRQ1 | Single-chip PMIC with 4 buck converters (max 3 A each), LDOs, and battery charger; no multi-phase capability or remote sensing. | Targets entry-level infotainment with lower current needs (<3 A/rail) and integrated charging/battery management. | Choose TPS65917B1RSLRQ1 for cost-sensitive designs needing integrated battery path control but lacking high-current, low-ripple requirements of LP87565VRNFRQ1. |
Compared with LP87562VRNFRQ1 and TPS65917B1RSLRQ1, the LP87565VRNFRQ1 uniquely delivers dual symmetric 2-phase outputs with integrated current sensing and remote differential feedback-making it the only option among the three capable of powering two independent 8-A automotive SoC domains while maintaining <±15 mV regulation accuracy under dynamic load.
Availability
LP87565VRNFRQ1 is available at Aetrix Electronics and suitable for automotive infotainment, ADAS radar processing, digital cluster display, and surround-view camera power applications requiring stable component supply, AEC-Q100 compliance, and long-term production support.
Supply support for LP87565VRNFRQ1 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
Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and automotive-grade power management solutions, with decades of automotive qualification expertise.
The LP8756x-Q1 product line was designed specifically for next-generation automotive domain controllers and ADAS platforms, integrating high-efficiency multi-phase conversion, precise telemetry, and robust fault protection in a single AEC-Q100-compliant package.
FAQ
What is the exact output configuration supported by the LP87565VRNFRQ1?
The LP87565VRNFRQ1 is factory-configured exclusively for two independent 2-phase buck outputs-each capable of delivering up to 8 A. Unlike other members of the LP8756x-Q1 family (e.g., LP87561-Q1 for 4-phase or LP87564-Q1 for four 1-phase rails), the LP87565VRNFRQ1 does not support reconfiguration to 4-phase, 3+1, or 4×1 topologies. Its pinout and internal routing are fixed for dual 2-phase operation.
Does the LP87565VRNFRQ1 support remote differential voltage sensing, and how is it implemented?
Yes, the LP87565VRNFRQ1 supports remote differential voltage sensing on both 2-phase outputs. It uses dedicated FB_B0/FB_B1 (positive) and shared ground-sense paths (e.g., FB_B1 also functions as negative feedback for Buck0) to compensate for IR drop between the regulator output and point-of-load. This ensures ±0.5% DC accuracy at the load, critical for SoC core rail stability.
What are the thermal protection thresholds for the LP87565VRNFRQ1, and are they configurable?
The LP87565VRNFRQ1 features two thermal thresholds: a warning level at 125°C (configurable to 137°C via TDIE_WARN_LEVEL bit) and a shutdown level at 150°C (fixed, with 20°C hysteresis). Both are measured at the die junction. The warning flag triggers the nINT pin and can be masked via I²C register; shutdown is hardware-asserted and non-maskable to ensure safety-critical failure containment.
Can the LP87565VRNFRQ1 measure load current without external sense resistors, and what is its accuracy?
Yes, the LP87565VRNFRQ1 integrates MOSFET RDS(on)-based current sensing for all four phases. It provides 20.47 A full-scale measurement with 20 mA LSB resolution and <10% accuracy for loads above 1 A. Measurement occurs in <45 µs (PFM mode) or 4 µs (PWM mode), enabling real-time telemetry for thermal derating and dynamic power budgeting in the LP87565VRNFRQ1.
What I²C speeds and timing modes does the LP87565VRNFRQ1 support, and are pull-up resistors required?
The LP87565VRNFRQ1 supports I²C Standard (100 kHz), Fast (400 kHz), Fast+ (1 MHz), and High-Speed (3.4 MHz) modes. Pull-up resistors are mandatory on SCL and SDA lines-typically 10 kΩ to VANA (3.3 V). High-Speed mode requires controlled rise/fall times (10–80 ns) and ≤400 pF bus capacitance, as specified in Section 7.6 of the LP87565VRNFRQ1 datasheet.
LP87565VRNFRQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 26-PowerVFQFN
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 2
- Voltage - Input (Min):
- 5.5V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 0.6V
- Voltage - Output (Max):
- 3.36V
- Current - Output:
- 16A
- Frequency - Switching:
- 2MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount, Wettable Flank
- Supplier Device Package:
- 26-VQFN-HR (4.5x4)
LP87565VRNFRQ1 FAQ
1.How can I place an order for LP87565VRNFRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for LP87565VRNFRQ1 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 LP87565VRNFRQ1 reliable?
The price and inventory of LP87565VRNFRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LP87565VRNFRQ1 is usually 5 days.
3.What payment methods are accepted for LP87565VRNFRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LP87565VRNFRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LP87565VRNFRQ1?
LP87565VRNFRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LP87565VRNFRQ1 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 LP87565VRNFRQ1?
For technical support, including LP87565VRNFRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LP87565VRNFRQ1 requirements.
6.How does Aetrix verify that LP87565VRNFRQ1 is sourced from the original manufacturer or authorized distributors?
All LP87565VRNFRQ1 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 LP87565VRNFRQ1 meets industry standards.
7.What is the process for return or replacement of LP87565VRNFRQ1?
All LP87565VRNFRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with LP87565VRNFRQ1, 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 LP87565VRNFRQ1 part is unused and in its original packaging.
Return procedure for LP87565VRNFRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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