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Texas Instruments LP87522BRNFTQ1
- Part No.:
- LP87522BRNFTQ1
- Manufacturer:
- Texas Instruments
- Package:
- 26-PowerVFQFN
- Datasheet:
-
LP87522BRNFTQ1.pdf
- Description:
- IC REG BUCK ADJ 4A/9A 26VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:250
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Product details
Overview
LP87522BRNFTQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive buck converter IC with four integrated MOSFETs, configured as one 3-phase and one 1-phase output. It delivers up to 9.0 A (3-phase) and 4.0 A (1-phase) at 2.8–5.5 V input, 0.6–3.36 V programmable output, and 2 MHz switching frequency. Used in infotainment and ADAS camera power rails.
For engineers reviewing the LP87522BRNFTQ1 datasheet, LP87522BRNFTQ1 pinout, LP87522BRNFTQ1 application, or LP87522BRNFTQ1 equivalent, key selection factors include phase configuration flexibility, I²C-programmable PGOOD thresholds, remote differential voltage sensing for multiphase outputs, and integrated load-current measurement without external sense resistors.
Technical Context
The LP87522BRNFTQ1 implements automatic PWM-to-PFM mode transition and dynamic phase adding/shedding across its two independent output rails - a 3-phase rail (BUCK0–BUCK2) and a 1-phase rail (BUCK3). Each rail supports programmable slew rate control, soft-start sequencing, and independent enable/GPIO control via EN1–EN3 pins.
It integrates a 2 MHz current-mode synchronous buck controller per phase, with on-die high-side (29–65 mΩ) and low-side (17–35 mΩ) FETs, spread-spectrum operation, and external clock synchronization capability (1–24 MHz). Remote sensing compensates IR drop between regulator and point-of-load for ±2% DC output accuracy.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.8 V to 5.5 V - supports wide automotive battery range including cold-crank transients down to 2.8 V. |
| Output Voltage Range | 0.6 V to 3.36 V in 5–20 mV steps - enables precise core voltage setting for SoCs and image sensors. |
| Max Output Current | 9.0 A (3-phase rail), 4.0 A (1-phase rail) - meets peak power demands of radar processors and high-res camera ISPs. |
| Switching Frequency | 1.8–2.2 MHz - allows compact 0.47 µH inductors and reduces EMI filtering burden in space-constrained modules. |
| I²C Interface Speed | Up to 3.4 MHz (High-Speed mode) - enables fast register writes during dynamic voltage scaling sequences. |
| Thermal Rating | Ambient –40°C to +125°C, Junction up to +140°C - qualified for under-hood and display cluster mounting locations. |
| Protection Features | Overtemperature warning/shutdown, OVP/UVLO, short-circuit & overload protection, and programmable PGOOD - ensures robust fault handling in safety-critical systems. |
Pinout & Package
VQFN-HR (RNF) 26-pin package, 4.50 mm × 4.00 mm body size, with exposed thermal pad. Designed for high-power density automotive PCB layouts requiring efficient heat dissipation through the bottom thermal pad.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SW_B0–SW_B3 | Buck switch node (x4) | Connects to external inductor; each drives one phase of the 3+1 configuration - SW_B0/B1/B2 form 3-phase rail, SW_B3 is standalone 1-phase. |
| FB_B0–FB_B3 | Feedback input (x4) | Remote differential sensing inputs - FB_B0/FB_B1/FB_B2 used for 3-phase rail; FB_B3 for 1-phase rail; supports Kelvin connection to POL. |
| VIN_B0–VIN_B3 | Input power supply (x4) | Independent input pins per phase - must be externally tied together and locally bypassed; decouples noise between phases. |
| EN1/EN2/EN3 | Configurable enable/GPIO (x3) | Programmable digital inputs that control rail enable, voltage level selection, or external device sequencing (e.g., processor reset). |
| SDA/SCL | I²C bidirectional data/clock | Supports standard/fast/fast+/high-speed modes - enables real-time telemetry (load current, temperature) and dynamic reconfiguration. |
| PGOOD | Power-good open-drain output | Programmable threshold (±8–20 mV) with 4–13 ms debounce - signals stable regulation to host processor or PMIC sequencer. |
| nINT | Interrupt output | Active-low open-drain signal indicating faults (OCP, OTP, UVLO) or status events (rail ready, PGOOD assertion). |
| NRST | Reset input | Asynchronous active-low reset - initiates full internal state reset and reinitializes all registers and output sequencing. |
Key Features
| Feature | Design Value |
|---|---|
| Configurable 3+1 phase architecture | Enables optimized power delivery: 3-phase rail for high-current SoC cores, 1-phase rail for auxiliary peripherals - minimizes ripple and improves transient response vs. fixed-configuration alternatives. |
| Integrated current sensing | Measures total output current per rail with 20 mA LSB resolution and <10% error - eliminates need for external sense resistors and associated board area and power loss. |
| Phase interleaving & spread spectrum | Reduces input/output ripple amplitude by >50% and lowers peak EMI by spreading energy across 2 MHz ±10% band - simplifies compliance with CISPR 25 Class 5. |
| Programmable startup/shutdown sequencing | Delays and order controlled via I²C or GPIO - allows safe power-up of dependent logic (e.g., FPGA config before I/O bank enable) without external timing components. |
| Remote differential voltage sensing | Compensates for up to 100 mΩ PCB trace resistance between regulator and load - maintains ±2% output accuracy at point-of-load under varying current loads. |
Applications
| Infotainment Head Unit Power | Digital Cluster Display Supply |
|---|---|
|
Use Scenario: Powers application processor, GPU, and DDR memory in central infotainment units with dynamic DVFS requirements. IC Role / Device Role / Timing Role: Primary multi-rail PMIC delivering 1.1 V @ 8 A (3-phase) and 3.3 V @ 2 A (1-phase) with synchronized soft-start. Use Value: Phase shedding below 1 A load extends battery runtime; I²C telemetry enables thermal throttling coordination with SoC. |
Use Scenario: Supplies LCD driver, touch controller, and microcontroller in instrument clusters with strict EMI limits. IC Role / Device Role / Timing Role: Dual-output buck regulator providing 1.8 V @ 6 A (3-phase) and 5.0 V @ 1.5 A (1-phase) with spread-spectrum switching. Use Value: Low-noise 2 MHz operation avoids AM radio band; PGOOD sequencing ensures display initialization before backlight enable. |
| Radar Processor Core Supply | ADAS Camera ISP Power |
|
Use Scenario: Delivers clean, tightly regulated voltage to 77 GHz radar SoCs with rapid load transients during chirp bursts. IC Role / Device Role / Timing Role: High-bandwidth 3-phase rail (1.0 V @ 9 A) with <±40 mV transient response and 3.8 mV/µs slew-rate limiting. Use Value: Fast phase-add/shed transitions (<1 µs) suppress output droop during 10 A step loads; remote sensing maintains voltage at die pad. |
Use Scenario: Powers image signal processor and high-speed MIPI interface in surround-view camera modules. IC Role / Device Role / Timing Role: Dual-rail solution: 1.2 V @ 4 A (3-phase) for ISP core, 2.8 V @ 2 A (1-phase) for MIPI PHY with independent PGOOD monitoring. Use Value: Independent enable control allows staggered power-up to limit inrush; I²C readback confirms rail health before frame capture. |
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 |
|---|---|---|---|
| LP87523BRNFTQ1 | Configured as one 2-phase + two 1-phase outputs - lacks 3-phase capability but offers greater rail count flexibility. | Better suited for systems requiring three independent lower-current rails (e.g., SoC core, I/O, memory) rather than one high-current rail + auxiliary. | Select LP87523BRNFTQ1 when needing three separate regulated outputs instead of one high-current 3-phase rail. |
| LP87525BRNFTQ1 | Two independent 2-phase outputs - no 1-phase option; higher per-rail current (8 A) but less granular phase control. | Ideal for dual-core processors or redundant power paths where balanced 2-phase loads dominate over asymmetric 3+1 use cases. | Choose LP87525BRNFTQ1 for symmetric dual-rail designs requiring 8 A per rail with interleaved ripple cancellation. |
Compared with LP87522BRNFTQ1, LP87523BRNFTQ1 trades 3-phase headroom for additional rail independence, while LP87525BRNFTQ1 sacrifices configurability for higher per-rail current and simpler dual-rail control - all share identical package, I²C interface, and automotive qualification.
Availability
LP87522BRNFTQ1 is available at Aetrix Electronics and suitable for automotive infotainment, digital cluster, and ADAS camera power applications requiring stable component supply, AEC-Q100 compliance, and long-term production continuity.
Supply support for LP87522BRNFTQ1 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 functional safety design.
The LP8752x-Q1 product line was developed specifically for next-generation automotive domain controllers and ADAS platforms, emphasizing high-efficiency multi-phase conversion, I²C-based system-level power orchestration, and robust fault resilience.
FAQ
What is the exact phase configuration supported by the LP87522BRNFTQ1?
The LP87522BRNFTQ1 is factory-configured for one 3-phase output (BUCK0–BUCK2) and one 1-phase output (BUCK3). This configuration is fixed and cannot be reprogrammed to other topologies like 2+2 or 4-phase. The 3-phase rail supports up to 9.0 A at VIN ≥3 V, while the 1-phase rail delivers up to 4.0 A under the same condition. LP87522BRNFTQ1 does not support 4-phase or dual-2-phase modes.
Does the LP87522BRNFTQ1 require external current-sense resistors for load monitoring?
No, the LP87522BRNFTQ1 integrates on-die current sensing for both output rails, providing 20 mA LSB resolution and <10% accuracy above 1 A load. This eliminates external sense resistors, reducing BOM cost, PCB area, and power loss. The measured current value is accessible via I²C register reads - no calibration or external circuitry is needed for basic telemetry in LP87522BRNFTQ1 applications.
How does remote differential voltage sensing work on the LP87522BRNFTQ1?
The LP87522BRNFTQ1 uses dedicated FB_Bx pins (FB_B0–FB_B2 for the 3-phase rail; FB_B3 for the 1-phase rail) to sense voltage directly at the point-of-load. These pins connect to the load-side of PCB traces, enabling the IC to compensate for IR drop between the regulator output and the load. This maintains ±2% DC output accuracy at the load under varying current conditions - a critical capability for LP87522BRNFTQ1 deployments in high-current automotive modules.
What I²C speeds does the LP87522BRNFTQ1 support, and why does it matter?
The LP87522BRNFTQ1 supports I²C standard (100 kHz), fast (400 kHz), fast+ (1 MHz), and high-speed (3.4 MHz) modes. High-speed mode enables sub-100 µs register writes, which is essential for dynamic voltage scaling during real-time processor workload changes. This speed directly impacts system responsiveness in LP87522BRNFTQ1-based power architectures where firmware must rapidly adjust output voltages or sequence events.
Can the LP87522BRNFTQ1 operate with an external clock source, and what are the requirements?
Yes, the LP87522BRNFTQ1 accepts an external clock on the CLKIN pin, supporting nominal frequencies from 1 MHz to 24 MHz with ±30% tolerance. External clock synchronization minimizes EMI by aligning switching edges with system clocks and enables deterministic timing in time-sensitive applications. The LP87522BRNFTQ1 automatically detects clock loss within 1.8 µs and reverts to its internal oscillator - ensuring uninterrupted operation if the external clock fails.
LP87522BRNFTQ1 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:
- 1
- Voltage - Input (Min):
- 2.8V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 0.6V
- Voltage - Output (Max):
- 3.36V
- Current - Output:
- 4A, 9A
- 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)
LP87522BRNFTQ1 FAQ
1.How can I place an order for LP87522BRNFTQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for LP87522BRNFTQ1 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 LP87522BRNFTQ1 reliable?
The price and inventory of LP87522BRNFTQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LP87522BRNFTQ1 is usually 5 days.
3.What payment methods are accepted for LP87522BRNFTQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LP87522BRNFTQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LP87522BRNFTQ1?
LP87522BRNFTQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LP87522BRNFTQ1 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 LP87522BRNFTQ1?
For technical support, including LP87522BRNFTQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LP87522BRNFTQ1 requirements.
6.How does Aetrix verify that LP87522BRNFTQ1 is sourced from the original manufacturer or authorized distributors?
All LP87522BRNFTQ1 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 LP87522BRNFTQ1 meets industry standards.
7.What is the process for return or replacement of LP87522BRNFTQ1?
All LP87522BRNFTQ1 units undergo pre-shipment inspection (PSI). If there is an issue with LP87522BRNFTQ1, 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 LP87522BRNFTQ1 part is unused and in its original packaging.
Return procedure for LP87522BRNFTQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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