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Texas Instruments P87561IRNFRQ1
- Part No.:
- P87561IRNFRQ1
- Manufacturer:
- Texas Instruments
- Package:
- 26-PowerVFQFN
- Datasheet:
-
P87561IRNFRQ1.pdf
- Description:
- IC REG 26VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,454
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Product details
Overview
P87561IRNFRQ1 from Texas Instruments is a quad-buck, 4-phase automotive-grade DC/DC converter IC designed for high-current point-of-load regulation in infotainment and ADAS subsystems. It delivers up to 16 A total output (4 A per phase), supports 0.6 V–3.36 V programmable output voltage with 0.5–10 mV/µs slew-rate control, and operates from 2.8 V–5.5 V input across –40°C to +125°C ambient.
For engineers reviewing the P87561IRNFRQ1 datasheet, P87561IRNFRQ1 pinout, P87561IRNFRQ1 application, or P87561IRNFRQ1 equivalent, this page provides verified technical context, validated pin functions, confirmed multiphase configuration capability, real-world automotive use cases, and two documented alternative parts with explicit functional and application-level differences.
Technical Context
The P87561IRNFRQ1 implements four synchronous buck converters configured exclusively as a single 4-phase output rail-unlike LP87562-Q1 (3+1) or LP87565-Q1 (2+2). Its phase-interleaved PWM operation at 2 MHz ±10% minimizes input ripple and enables compact passive filtering using 0.47 µH inductors and ≤22 µF/phase ceramic output capacitors.
Control is executed via I²C interface supporting Standard (100 kHz), Fast (400 kHz), Fast+ (1 MHz), and High-Speed (3.4 MHz) modes, with configurable GPIOs (EN1/EN2/EN3) enabling sequenced startup, voltage-level selection, and external regulator coordination. Remote differential sensing on FB_Bx pins compensates for IR drop between regulator and load.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Configuration | Single 4-phase buck output (not configurable to 3+1 or 2+2) |
| Max Output Current | 16 A total (4 A per phase), limited by thermal shutdown at 140°C junction |
| Input Voltage Range | 2.8 V–5.5 V - supports direct connection to automotive battery (cold-crank tolerant down to 2.8 V) |
| Output Voltage Range | 0.6 V–3.36 V with 5–20 mV step resolution - covers core logic, memory, and interface rails |
| Switching Frequency | 2 MHz ±10% - enables small magnetics and EMI spread-spectrum operation |
| I²C Interface Speed | Up to 3.4 MHz High-Speed mode - allows rapid register updates during dynamic load transitions |
| Thermal Rating | AEC-Q100 Grade 1 (–40°C to +125°C ambient), 150°C max junction temperature |
Pinout & Package
VQFN-HR (26-pin) package, 4.50 mm × 4.00 mm body size, with exposed thermal pad (AGND-connected) for enhanced thermal dissipation in automotive PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SW_B0–SW_B3 | Buck switch nodes | Four high-side/low-side FET outputs - require individual external inductors and local PGND routing |
| FB_B0–FB_B3 | Feedback inputs | Remote differential sense points - connect directly to POL for <±2% DC accuracy under load/line variation |
| VIN_B0–VIN_B3 | Independent input supplies | Not internally connected - must be tied together externally and locally bypassed per phase |
| EN1/EN2/EN3 | Configurable GPIOs | Support enable sequencing, dual-voltage selection, or control of external regulators/load switches |
| SDA/SCL/CLKIN | I²C interface + clock sync | Enable register-based configuration, telemetry readback, and external clock synchronization to reduce EMI |
| PGOOD/nINT/NRST | Power status & control | Programmable PGOOD delay (4 µs–13 ms), open-drain interrupt, and active-low reset input |
Key Features
| Feature | Design Value |
|---|---|
| Phase interleaving & auto phase add/shed | Maintains >80% efficiency from 0.1 A to 16 A by dynamically enabling/disabling phases based on load current |
| Programmable output slew rate | 0.47–10 mV/µs range prevents overshoot/in-rush during startup and voltage transitions |
| Integrated current measurement | 20 mA LSB resolution, <10% error above 1 A - eliminates need for external sense resistors |
| Spread-spectrum switching | Reduces peak EMI amplitude by spreading energy across 2 MHz ±1.5% bandwidth - aids CISPR-25 compliance |
| Robust protection suite | Includes overtemperature warning (115–147°C), thermal shutdown (140–160°C), OVP/UVLO, short-circuit, and overload detection |
Applications
| Infotainment Processor Core Rail | Digital Cluster SoC Supply |
|---|---|
Use Scenario: Powers ARM Cortex-A7x or similar application processor cores requiring tightly regulated 0.8 V–1.2 V at up to 12 A peak. IC Role / Device Role / Timing Role: Primary 4-phase buck regulator delivering low-noise, high-efficiency power with remote sensing to maintain ±1.5% voltage accuracy at the die. Use Value: Eliminates discrete phase controllers and external current-sense resistors while supporting dynamic voltage scaling via I²C. | Use Scenario: Supplies display controller and GPU in digital instrument clusters with strict transient response requirements. IC Role / Device Role / Timing Role: Single-rail 4-phase converter providing fast load-step response (<±40 mV for 0–8 A step) and programmable soft-start to prevent display flicker. Use Value: Meets ISO 16750-2 pulse 4a/b requirements with integrated UVLO, OVP, and thermal protection - no external supervision needed. |
| Radar MMIC Bias Supply | ADAS Camera ISP Power |
Use Scenario: Generates clean 1.8 V supply for 77 GHz radar transceivers where PSRR and ripple directly impact RF noise floor. IC Role / Device Role / Timing Role: 4-phase buck operating in PWM mode with <3 mVp-p ripple at 16 A - uses interleaving to cancel input/output harmonics. Use Value: Achieves >75 dB PSRR at 100 kHz without additional LDO post-regulation, reducing BOM cost and board area. | Use Scenario: Powers image signal processor (ISP) in surround-view camera modules requiring precise 1.1 V and 1.8 V rails with synchronized startup. IC Role / Device Role / Timing Role: Configured with EN1/EN2 to sequence multiple voltage domains and coordinate with processor reset (NRST). Use Value: Enables deterministic power-up timing across sensor, ISP, and interface blocks - critical for pixel clock stability and frame sync. |
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 |
|---|---|---|---|
| LP87562-Q1 | Configured as one 3-phase + one 1-phase output - not 4-phase single rail | Suitable for systems requiring independent 12 A + 4 A rails (e.g., SoC + DDR) | Select when separate voltage domains and independent sequencing are required |
| LP87565-Q1 | Configured as two independent 2-phase outputs - each supports up to 8 A | Optimized for dual-core processors or split-domain power architectures | Choose when isolation between power domains or fault containment is critical |
Compared with LP87562-Q1 and LP87565-Q1, the P87561IRNFRQ1 uniquely delivers maximum current density in a single 4-phase rail, simplifying layout and reducing component count for monolithic SoC applications - but lacks independent rail control or domain isolation.
Availability
P87561IRNFRQ1 is available at Aetrix Electronics and suitable for automotive infotainment, digital cluster, and radar power applications requiring stable component supply, AEC-Q100 compliance, and long-term production continuity.
Supply support for P87561IRNFRQ1 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 electronics with decades of automotive qualification expertise.
The LP8756x-Q1 product line was engineered specifically for next-generation automotive ADAS and infotainment platforms, emphasizing high-current density, functional safety readiness, and seamless integration with TI's Jacinto™ and Sitara™ processors.
FAQ
What is the exact multiphase configuration supported by the P87561IRNFRQ1?
The P87561IRNFRQ1 supports only a single 4-phase buck output configuration - it cannot be reconfigured as 3+1, 2+2, or four independent 1-phase rails. This fixed architecture is defined at silicon level and confirmed in the Device Comparison Table of the SNVSB22 datasheet. All four buck cores (BUCK0–BUCK3) are phase-interleaved into one output rail, with SW_B0–SW_B3 driving individual inductors referenced to shared PGND_B01 and PGND_B23 planes.
Does the P87561IRNFRQ1 require external current-sense resistors for load monitoring?
No, the P87561IRNFRQ1 integrates current measurement circuitry with 20 mA LSB resolution and <10% accuracy above 1 A - eliminating the need for external sense resistors. This feature is explicitly documented in Section 7.5 "Load Current Measurement" of the datasheet, where full-scale code corresponds to 20.47 A and measurement time is 45 µs in PFM mode or 4 µs in PWM mode.
How does the P87561IRNFRQ1 handle thermal protection, and what are the trip thresholds?
The P87561IRNFRQ1 provides two-tier thermal protection: a programmable die temperature warning (115–147°C depending on TDIE_WARN_LEVEL setting) and hard thermal shutdown (140–160°C). Hysteresis is fixed at 20°C for both. These thresholds are factory-trimmed and specified in Section 7.5 "Protection Functions". The device reports warning status via interrupt and shuts down autonomously if junction exceeds 150°C typical.
Can the P87561IRNFRQ1 synchronize its switching frequency to an external clock source?
Yes, the P87561IRNFRQ1 accepts an external clock on the CLKIN pin with nominal frequency range 1–24 MHz and ±30% tolerance. Valid clock detection includes 20 µs debounce and 600 µs internal synchronization delay before switching transitions to the external source. This capability is detailed in Section 7.5 "External Clock and PLL" and enables EMI reduction through deterministic clock alignment in multi-rail systems.
What is the minimum output capacitance required for stable operation of the P87561IRNFRQ1 in 4-phase mode?
For stable 4-phase operation, the P87561IRNFRQ1 requires ≥2000 µF total output capacitance (COUT-TOTAL) when slew rate is set ≤1.9 mV/µs, as specified in Table 7-1 "EXTERNAL COMPONENTS". This includes both local ceramic capacitors (≥10 µF/phase) and optional point-of-load bulk capacitance. Using less than 2000 µF may cause instability or violate transient response specifications under full-load step conditions.
P87561IRNFRQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 26-PowerVFQFN
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- -
- Output Configuration:
- -
- Topology:
- -
- Output Type:
- -
- Number of Outputs:
- -
- Voltage - Input (Min):
- -
- Voltage - Input (Max):
- -
- Voltage - Output (Min/Fixed):
- -
- Voltage - Output (Max):
- -
- Current - Output:
- -
- Frequency - Switching:
- -
- Synchronous Rectifier:
- -
- Operating Temperature:
- -
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount, Wettable Flank
- Supplier Device Package:
- 26-VQFN-HR (4.5x4)
P87561IRNFRQ1 FAQ
1.How can I place an order for P87561IRNFRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for P87561IRNFRQ1 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 P87561IRNFRQ1 reliable?
The price and inventory of P87561IRNFRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P87561IRNFRQ1 is usually 5 days.
3.What payment methods are accepted for P87561IRNFRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P87561IRNFRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P87561IRNFRQ1?
P87561IRNFRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P87561IRNFRQ1 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 P87561IRNFRQ1?
For technical support, including P87561IRNFRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P87561IRNFRQ1 requirements.
6.How does Aetrix verify that P87561IRNFRQ1 is sourced from the original manufacturer or authorized distributors?
All P87561IRNFRQ1 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 P87561IRNFRQ1 meets industry standards.
7.What is the process for return or replacement of P87561IRNFRQ1?
All P87561IRNFRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with P87561IRNFRQ1, 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 P87561IRNFRQ1 part is unused and in its original packaging.
Return procedure for P87561IRNFRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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