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Texas Instruments LP87524PRNFRQ1
- Part No.:
- LP87524PRNFRQ1
- Manufacturer:
- Texas Instruments
- Package:
- 26-PowerVFQFN
- Datasheet:
-
LP87524PRNFRQ1.pdf
- Description:
- IC REG BUCK ADJ QUAD 26VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,275
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Product details
Overview
LP87524PRNFRQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive-qualified quad buck DC-DC converter IC for radar and imaging MMIC power management. It delivers four independent 4-MHz synchronous step-down outputs (Buck0–Buck3), supports 2.8 V to 5.5 V input, programmable 0.6 V–3.36 V outputs, and up to 10 A total output current with 3.8 mV/µs slew-rate control. It powers AWR/IWR radar SoCs in automotive radar modules.
For engineers reviewing the LP87524PRNFRQ1 datasheet, LP87524PRNFRQ1 pinout, LP87524PRNFRQ1 application, or LP87524PRNFRQ1 equivalent, key selection criteria include its 4-MHz switching frequency with spread-spectrum and phase interleaving, I²C interface supporting up to 3.4 MHz, remote sensing capability, and integrated load-current measurement without external sense resistors.
Technical Context
The LP87524PRNFRQ1 implements four independent PWM-controlled buck regulators with integrated high-side and low-side FETs (RDS(ON) HS: 29–65 mΩ; LS: 17–35 mΩ). Each regulator supports automatic PFM/PWM mode transition at 200 mA (PWM→PFM) and 600 mA (PFM→PWM), enabling high efficiency across light to full load.
It features a programmable I²C interface (100 kHz–3.4 MHz), configurable GPIOs (EN1/EN2/EN3), synchronized clock input (1–24 MHz), and comprehensive protection including overtemperature warning (115–147 °C), thermal shutdown (140–160 °C), OVP/UVLO on VANA, and per-phase overcurrent limiting (e.g., Buck2 forward limit: 4.0–6.0 A).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.8 V to 5.5 V - supports direct connection to automotive battery rail with transient tolerance. |
| Output Voltage Range | 0.6 V to 3.36 V - digitally programmable in 5–20 mV steps, enabling precise rail tuning for RF/digital cores. |
| Switching Frequency | 4 MHz nominal (3.6–4.4 MHz) - enables compact 0.47 µH inductors and reduces EMI in radar band-sensitive designs. |
| Total Output Current | Up to 10 A - distributed across four phases (e.g., LP87524P-Q1: Buck0/Buck2 = 3 A each, Buck1 = 1.5 A, Buck3 = 2.5 A). |
| I²C Interface Speed | Up to 3.4 MHz (High-Speed mode) - allows fast dynamic voltage scaling during radar frame transitions. |
| Output Slew Rate | 3.8 mV/µs - minimizes output overshoot and inrush current during startup and voltage changes. |
| Thermal Protection | Die temperature warning at 115–147 °C and shutdown at 140–160 °C - ensures safe operation in under-hood environments. |
Pinout & Package
The LP87524PRNFRQ1 is housed in a 26-pin VQFN-HR package (4.50 mm × 4.00 mm) with exposed thermal pad. Pin functions are validated per TI SNVSAW2B datasheet Rev. B (December 2018).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| FB_B0–FB_B3 | Feedback inputs (x4) | Remote voltage sensing nodes for per-buck output regulation; enable point-of-load accuracy. |
| SW_B0–SW_B3 | Switch node outputs (x4) | Internal high-side/low-side FET drain connections; require local LC filtering per phase. |
| VIN_B0–VIN_B3, VANA | Power inputs (x5) | Separate input pins per buck stage - must be externally tied and locally bypassed to minimize crosstalk. |
| EN1/EN2/EN3 | Configurable enables / GPIOs | Multi-function digital pins supporting enable sequencing, voltage-level selection, or external control signals. |
| SCL/SDA/nINT/CLKIN/NRST | Digital interface & control | I²C bus, interrupt output, external clock sync, and hardware reset - all support automotive voltage thresholds. |
| PGOOD | Power-good status | Programmable open-drain or push-pull output indicating all enabled rails are within ±2% (or ±20 mV) tolerance. |
Key Features
| Feature | Design Value |
|---|---|
| Phase-interleaved 4-MHz operation | Reduces input/output ripple and EMI peak amplitude by distributing switching events across four phases. |
| Integrated load-current measurement | Monitors real-time per-phase current without external sense resistors - simplifies layout and improves accuracy. |
| Programmable start-up/shutdown sequencing | Enables controlled power-up/down of radar subsystems via ENx/GPIO coordination and voltage ramp timing. |
| Spread-spectrum modulation | Lowers radiated emissions in narrowband radar bands (e.g., 76–81 GHz) without sacrificing regulation performance. |
| Remote sensing with dedicated FB pins | Compensates for PCB IR drop between converter output and MMIC supply pins - maintains <±2% DC accuracy. |
Applications
| Radar Transceiver Power | Automotive Camera Module |
|---|---|
|
Use Scenario: Powers RF front-end and baseband processors in 77-GHz AWR/IWR radar sensors. IC Role / Device Role / Timing Role: Quad-buck PMIC delivering isolated, sequenced, and tightly regulated rails (e.g., 1.0 V, 1.2 V, 1.8 V, 3.3 V) to MMICs and DSPs. Use Value: Enables compliance with CISPR 25 Class 5 EMI limits via 4-MHz interleaving and spread-spectrum, while maintaining <2% output accuracy under dynamic load transients. |
Use Scenario: Supplies image sensor, ISP, and interface logic in ADAS camera systems with ASIL-B requirements. IC Role / Device Role / Timing Role: Single-chip power solution managing core, I/O, analog, and interface voltages with fault reporting via nINT and PGOOD. Use Value: Reduces bill-of-materials by replacing four discrete buck converters; supports functional safety diagnostics via thermal warning, OVP/UVLO, and per-rail PGOOD monitoring. |
| Instrument Cluster Display | ADAS Domain Controller |
|
Use Scenario: Delivers multiple voltage rails to TFT-LCD driver, microcontroller, and CAN transceiver in digital instrument clusters. IC Role / Device Role / Timing Role: Configurable quad-output regulator with GPIO-controlled sequencing to manage display backlight dimming and MCU wake-up timing. Use Value: Eliminates need for external sequencing ICs; programmable slew rate prevents display flicker during power-up and voltage transitions. |
Use Scenario: Provides primary power domains for centralized ADAS compute platforms integrating radar, vision, and fusion processing. IC Role / Device Role / Timing Role: High-efficiency multi-rail source supporting heterogeneous SoC cores (CPU, GPU, accelerator) with independent voltage/frequency scaling. Use Value: Achieves >90% peak efficiency at 1–3 A loads, reducing thermal load in sealed controller enclosures; I²C programmability enables OTA firmware-based rail reconfiguration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad-buck automotive power management applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LP87524J-Q1 | Same pinout and register map; default outputs tuned for 1 V/1.8 V RF rails with ferrite-filter support. | Better suited for cost-sensitive radar modules requiring lower-voltage RF bias (e.g., 1 V LDO-fed MMICs). | Select when fixed 1 V/1.8 V RF rail configuration suffices and ferrite-based filtering is preferred over active LDO post-regulation. |
| LP87524B-Q1 | Identical package and interface; default outputs set to 3.3 V/1.2 V/1.8 V/2.3 V targeting mixed I/O + RF + digital loads. | Optimized for infotainment and cluster applications needing higher I/O voltage (3.3 V) and flexible RF bias (1.8 V, 2.3 V). | Choose when system requires native 3.3 V I/O rail and dual RF rails (1.8 V + 2.3 V) without external LDOs. |
Compared with LP87524J-Q1 and LP87524B-Q1, the LP87524PRNFRQ1 offers identical electrical and mechanical compatibility but is specifically configured for high-current RF rails (1 V @ 3 A, 1 V @ 3 A) in AWR/IWR radar platforms - making it optimal for next-gen millimeter-wave sensor designs demanding tighter current capability on dual RF outputs.
Availability
LP87524PRNFRQ1 is available at Aetrix Electronics and suitable for automotive radar modules, ADAS camera power systems, and instrument cluster displays requiring stable component supply, AEC-Q100 qualification, and long-term production continuity.
Supply support for LP87524PRNFRQ1 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 LP87524PRNFRQ1 belongs to TI's LP875xx-Q1 family - engineered specifically for millimeter-wave radar (AWR/IWR) and advanced driver-assistance systems, emphasizing high-frequency switching, EMI control, and functional safety-aware power sequencing.
FAQ
What is the maximum output current supported by LP87524PRNFRQ1 per buck channel?
The LP87524PRNFRQ1 supports up to 3 A on Buck0 and Buck2, 1.5 A on Buck1, and 2.5 A on Buck3 - totaling 10 A. These values reflect the LP87524P-Q1 variant's rated current limits under 2.8 V ≤ VIN < 3 V and VIN ≥ 3 V conditions, verified in TI's SNVSAW2B datasheet Section 6.5.
Does LP87524PRNFRQ1 support external clock synchronization?
Yes, LP87524PRNFRQ1 accepts an external clock input (CLKIN) from 1 MHz to 24 MHz in 1-MHz steps. This enables EMI reduction through deterministic frequency alignment with system clocks and eliminates beat frequencies in radar-sensitive applications.
How does LP87524PRNFRQ1 implement load-current measurement without sense resistors?
LP87524PRNFRQ1 uses internal MOSFET RDS(ON) sensing combined with duty-cycle and switching waveform analysis to estimate per-phase current. It provides 20-mA resolution and <10% accuracy above 1 A, eliminating external sense resistors and associated board space and power loss.
What protection features are integrated into LP87524PRNFRQ1?
LP87524PRNFRQ1 integrates overtemperature warning (configurable 115–147 °C), thermal shutdown (140–160 °C), VANA overvoltage/undervoltage lockout, per-phase overcurrent limiting (forward/negative), output overvoltage/undervoltage monitoring for PGOOD, and short-circuit protection - all meeting AEC-Q100 reliability requirements.
Is LP87524PRNFRQ1 pin-compatible with other variants in the LP87524x-Q1 family?
Yes, LP87524PRNFRQ1 shares identical 26-pin VQFN-HR (4.5 mm × 4.0 mm) packaging and pinout with LP87524B-Q1 and LP87524J-Q1. All variants use the same register map and I²C command structure, enabling hardware reuse across radar, cluster, and infotainment platforms.
LP87524PRNFRQ1 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:
- 4
- Voltage - Input (Min):
- 2.8V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 0.6V
- Voltage - Output (Max):
- 3.36V
- Current - Output:
- 4A, 4A, 4A, 4A
- Frequency - Switching:
- 2MHz, 3MHz, 4MHz
- Synchronous Rectifier:
- No
- 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)
LP87524PRNFRQ1 FAQ
1.How can I place an order for LP87524PRNFRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for LP87524PRNFRQ1 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 LP87524PRNFRQ1 reliable?
The price and inventory of LP87524PRNFRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LP87524PRNFRQ1 is usually 5 days.
3.What payment methods are accepted for LP87524PRNFRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LP87524PRNFRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LP87524PRNFRQ1?
LP87524PRNFRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LP87524PRNFRQ1 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 LP87524PRNFRQ1?
For technical support, including LP87524PRNFRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LP87524PRNFRQ1 requirements.
6.How does Aetrix verify that LP87524PRNFRQ1 is sourced from the original manufacturer or authorized distributors?
All LP87524PRNFRQ1 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 LP87524PRNFRQ1 meets industry standards.
7.What is the process for return or replacement of LP87524PRNFRQ1?
All LP87524PRNFRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with LP87524PRNFRQ1, 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 LP87524PRNFRQ1 part is unused and in its original packaging.
Return procedure for LP87524PRNFRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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