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Texas Instruments LP87524BRNFTQ1
- Part No.:
- LP87524BRNFTQ1
- Manufacturer:
- Texas Instruments
- Package:
- 26-PowerVFQFN
- Datasheet:
-
LP87524BRNFTQ1.pdf
- Description:
- IC REG BUCK ADJ QUAD 26VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:439
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Product details
Overview
LP87524BRNFTQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive-qualified quad buck converter IC designed for radar and imaging MMIC power delivery in AWR/IWR platforms. It delivers four independent 4-MHz synchronous step-down outputs with total up to 10 A, 0.6–3.36 V programmable output voltage per channel, and 3.8 mV/µs slew-rate control - enabling precise sequencing for RF and digital subsystems in automotive radar modules.
For engineers reviewing the LP87524BRNFTQ1 datasheet, LP87524BRNFTQ1 pinout, LP87524BRNFTQ1 application, or LP87524BRNFTQ1 equivalent, key selection considerations 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 LP87524BRNFTQ1 integrates four independent buck regulator cores, each with dedicated high-side and low-side FETs (RDS(ON) HS: 29–65 mΩ; LS: 17–35 mΩ), programmable soft-start, and autonomous PFM/PWM auto-mode transition at 200 mA (PWM→PFM) and 600 mA (PFM→PWM). It supports external clock synchronization (1–24 MHz) and provides real-time die temperature monitoring with thermal warning (115–147 °C) and shutdown (140–160 °C).
Its digital control architecture includes a 3.4-MHz-capable I²C interface with configurable GPIOs (EN1/EN2/EN3), programmable PGOOD thresholds (±20 mV for rising/falling ramps), and interrupt masking. Remote voltage sensing compensates IR drop between regulator output and point-of-load, improving DC accuracy to ±2% (VOUT ≥1 V, PWM mode) and ±20 mV (VOUT <1 V).
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 UVLO (2.51–2.75 V) and OVP (5.6–6.1 V) protection. |
| Output Voltage Range | 0.6 V to 3.36 V per channel - 10 mV/5 mV/20 mV step resolution enables fine-grained rail tuning for RF, digital, and I/O domains. |
| Switching Frequency | 4 MHz nominal (3.6–4.4 MHz) - enables ultra-small external inductors (0.47 µH) and reduces EMI in space-constrained radar modules. |
| Total Output Current | Up to 10 A combined - distributed across four channels (e.g., Buck0: 1.5 A, Buck1: 1.5 A, Buck2: 4 A, Buck3: 2.5 A per default AWR configuration). |
| I²C Interface Speed | Up to 3.4 MHz (High-Speed mode) - allows rapid register access for dynamic voltage scaling and fault recovery in real-time radar processing. |
| Thermal Protection | Dual-level thermal management: warning flag at 115–147 °C (configurable), shutdown at 140–160 °C - ensures safe operation under sustained RF load conditions. |
| Load Current Sensing | Integrated measurement with 20 mA LSB resolution and <10% accuracy above 1 A - eliminates need for external current-sense resistors and PCB area. |
Pinout & Package
VQFN-HR (26-pin) package, 4.50 mm × 4.00 mm body size with exposed thermal pad - optimized for high-power density and thermal dissipation in automotive radar modules.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| FB_B0–FB_B3 | Feedback input (x4) | Remote-sensing inputs for individual buck regulators - enables accurate regulation at point-of-load despite PCB trace resistance. |
| SW_B0–SW_B3 | Switch node (x4) | High-frequency switching nodes connecting to external inductors - require tight layout and low-inductance paths to minimize EMI. |
| VIN_B0–VIN_B3 | Input power (x4) | Independent input pins per buck channel - must be externally tied together and locally bypassed to reduce cross-regulator coupling. |
| EN1/EN2/EN3 | Enable/GPIO (x3) | Configurable as enable signals or programmable GPIOs (push-pull/open-drain) - used for sequencing external LDOs or processor reset control. |
| SDA/SCL | I²C data/clock | High-speed bidirectional interface - supports standard (100 kHz), fast (400 kHz), fast+ (1 MHz), and high-speed (3.4 MHz) modes with 1.65–3.6 V logic levels. |
| nINT/PGOOD/NRST | Interrupt/Power Good/Reset | Open-drain nINT signals system faults; PGOOD is programmable per rail; NRST provides hardware reset with internal 650–1700 kΩ pulldown. |
Key Features
| Feature | Design Value |
|---|---|
| Spread-spectrum & phase interleaving | Reduces peak EMI by spreading switching energy across frequency band and offsetting channel phases - critical for meeting CISPR-25 Class 5 in radar systems. |
| Programmable slew rate (3.23–4.4 mV/µs) | Minimizes output voltage overshoot and inrush current during startup/voltage transitions - protects sensitive RF MMICs from transient stress. |
| Remote voltage sensing (per channel) | Compensates for IR drop between regulator and load - maintains ±2% output accuracy at point-of-load without requiring sense traces on PCB. |
| Integrated load-current measurement | 20 mA LSB resolution, <10% error above 1 A - eliminates external sense resistors, saves board space, and avoids associated power loss and thermal drift. |
| Configurable GPIOs with direction control | Three ENx pins support bidirectional I/O with programmable drive strength and open-drain/push-pull modes - enables flexible system-level sequencing and status reporting. |
Applications
| Radar Transceiver Power | Automotive Cluster Display |
|---|---|
Use Scenario: Powers AWR1843/6843 RF transceivers requiring tightly regulated, low-noise 1.0 V, 1.2 V, 1.8 V, and 3.3 V rails with strict sequencing and fast transient response. IC Role / Device Role / Timing Role: Quad-buck PMIC delivering independent, synchronized, and slew-controlled outputs - acts as primary power source for MMIC, DSP, memory, and interface blocks. Use Value: Enables single-chip power solution for radar SoCs with 4-MHz switching, reducing external component count by >30% vs discrete buck designs while meeting CISPR-25 EMI limits. |
Use Scenario: Supplies multiple voltage domains (core, I/O, backlight, touch controller) in digital instrument clusters with varying load profiles and thermal constraints. IC Role / Device Role / Timing Role: Centralized power manager providing sequenced, monitored, and protected outputs - coordinates startup/shutdown with MCU via I²C and GPIOs. Use Value: Simplifies BOM with integrated PGOOD, thermal warning, and interrupt signaling - reduces need for external supervisors and improves system-level fault diagnostics. |
| ADAS Camera Module | Radar Signal Processor |
Use Scenario: Powers image sensor, ISP, and SerDes in 77-GHz radar camera fusion modules where EMI-sensitive analog circuits coexist with high-speed digital interfaces. IC Role / Device Role / Timing Role: Low-noise, spread-spectrum buck regulator supplying clean 1.2 V core and 2.8 V I/O rails - uses phase interleaving to suppress switching noise coupling into analog signal paths. Use Value: Achieves <4 mVp-p ripple in PWM mode (COUT = 22 µF, L = 0.47 µH) - meets stringent noise requirements for high-dynamic-range image sensors. |
Use Scenario: Delivers stable, sequenced power to C66x/C7x DSP cores and accelerator units in automotive radar processors requiring sub-100 ns transient response. IC Role / Device Role / Timing Role: High-bandwidth power controller with 45 µs current measurement and programmable soft-start - enables real-time load monitoring and adaptive voltage scaling. Use Value: Supports dynamic voltage/frequency scaling (DVFS) via I²C with <100 µs register update latency - improves power efficiency during variable radar chirp processing loads. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad-buck power management applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LP87524JRNFTQ1 | Same pinout and package; differs in factory-default output configuration (Buck2 = 1.0 V / 4 A, Buck3 = 1.8 V / 2.5 A) and forward current limit thresholds. | Optimized for AWR/IWR radar with ferrite-filtered RF rails; lower Buck2 VOUT suits 1-V core logic in newer MMICs. | Select when default 1.0-V Buck2 rail matches target SoC requirements - avoids I²C reconfiguration during bring-up. |
| LP87524PRNFTQ1 | Same mechanical form; differs in per-channel current ratings (Buck0/Buck2 = 3 A each) and default VOUT (Buck0 = 1.0 V, Buck2 = 1.0 V). | Targeted at compact radar modules with dual 1-V RF rails; higher per-rail current supports parallel MMIC configurations. | Choose for space-constrained designs needing two 3-A 1-V outputs - trades off Buck1 current (1.5 A) for enhanced RF rail capability. |
Compared with LP87524JRNFTQ1 and LP87524PRNFTQ1, the LP87524BRNFTQ1 offers the highest default Buck2 output (1.8 V / 4 A) and is optimized for legacy AWR1642/1843 platforms requiring 1.8-V RF bias, making it the preferred choice for established radar designs with minimal firmware adaptation.
Availability
LP87524BRNFTQ1 is available at Aetrix Electronics and suitable for automotive radar, cluster display, and ADAS camera power applications requiring stable component supply, AEC-Q100 compliance, and long-term production continuity.
Supply support for LP87524BRNFTQ1 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 company specializing in analog and embedded processing technologies, with deep expertise in automotive power management and radar signal chain solutions.
The LP87524BRNFTQ1 belongs to TI's LP875xx-Q1 family of automotive-qualified multi-rail PMICs, engineered specifically for millimeter-wave radar and vision processing platforms requiring high-efficiency, low-noise, and highly integrated power delivery.
FAQ
What is the maximum total output current supported by the LP87524BRNFTQ1?
The LP87524BRNFTQ1 supports a total output current of up to 10 A across its four buck channels. Per-channel limits vary by input voltage and configuration: Buck0 and Buck1 deliver up to 1.5 A each, Buck2 up to 4 A (at VIN ≥3 V), and Buck3 up to 2.5 A. These values reflect the LP87524BRNFTQ1's default AWR-optimized settings and are validated under recommended operating conditions (TA = −40°C to +125°C, VIN = 2.8–5.5 V).
Does the LP87524BRNFTQ1 support external clock synchronization?
Yes, the LP87524BRNFTQ1 supports external clock synchronization via the CLKIN pin. It accepts input clocks from 1 MHz to 24 MHz in 1-MHz steps, with detection delay of 1.8 µs and internal lock time of 600 µs. This feature allows the LP87524BRNFTQ1 to align switching edges with system master clocks - reducing beat frequencies and EMI in multi-PMIC or radar-processor systems.
How does the LP87524BRNFTQ1 implement remote voltage sensing?
The LP87524BRNFTQ1 implements remote voltage sensing through dedicated FB_B0–FB_B3 pins, each connected directly to the point-of-load (POL) for its respective buck channel. This topology compensates for IR drop across PCB traces and connectors, maintaining output voltage accuracy within ±2% (VOUT ≥1 V, PWM mode) at the load - without requiring additional components or layout complexity.
What protection features are integrated into the LP87524BRNFTQ1?
The LP87524BRNFTQ1 integrates overvoltage protection (OVP) and undervoltage lockout (UVLO) on VANA (5.6–6.1 V OVP, 2.51–2.75 V UVLO), per-buck overcurrent limiting (ILIM FWD: 2.3–6.0 A depending on channel and VIN), thermal warning (115–147 °C) and shutdown (140–160 °C), and programmable PGOOD monitoring with ±20 mV ramp thresholds. All protections are hardware-based and operate independently of I²C communication.
Can the EN1/EN2/EN3 pins of the LP87524BRNFTQ1 be used as general-purpose I/Os?
Yes, EN1, EN2, and EN3 on the LP87524BRNFTQ1 are multiplexed pins that can be configured as either enable signals for their respective buck regulators or as general-purpose I/Os (GPIO1–GPIO3). Their direction (input/output), drive type (push-pull or open-drain), and pull-up/down states are programmable via I²C registers - enabling flexible system-level control of external LDOs, reset lines, or status indicators.
LP87524BRNFTQ1 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:
- 4MHz
- 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)
LP87524BRNFTQ1 FAQ
1.How can I place an order for LP87524BRNFTQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for LP87524BRNFTQ1 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 LP87524BRNFTQ1 reliable?
The price and inventory of LP87524BRNFTQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LP87524BRNFTQ1 is usually 5 days.
3.What payment methods are accepted for LP87524BRNFTQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LP87524BRNFTQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LP87524BRNFTQ1?
LP87524BRNFTQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LP87524BRNFTQ1 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 LP87524BRNFTQ1?
For technical support, including LP87524BRNFTQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LP87524BRNFTQ1 requirements.
6.How does Aetrix verify that LP87524BRNFTQ1 is sourced from the original manufacturer or authorized distributors?
All LP87524BRNFTQ1 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 LP87524BRNFTQ1 meets industry standards.
7.What is the process for return or replacement of LP87524BRNFTQ1?
All LP87524BRNFTQ1 units undergo pre-shipment inspection (PSI). If there is an issue with LP87524BRNFTQ1, 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 LP87524BRNFTQ1 part is unused and in its original packaging.
Return procedure for LP87524BRNFTQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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