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Texas Instruments LP87522ERNFRQ1
- Part No.:
- LP87522ERNFRQ1
- Manufacturer:
- Texas Instruments
- Package:
- 26-PowerVFQFN
- Datasheet:
-
LP87522ERNFRQ1.pdf
- Description:
- IC REG BUCK ADJ 4A/9A DL 26VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,447
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Product details
Overview
LP87522ERNFRQ1 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. It powers infotainment SoCs and radar processors requiring tight voltage regulation and dynamic phase management.
For engineers reviewing the LP87522ERNFRQ1 datasheet, LP87522ERNFRQ1 pinout, LP87522ERNFRQ1 application, or LP87522ERNFRQ1 equivalent, key selection criteria include multiphase configuration flexibility, I²C-programmable slew rate and PGOOD thresholds, remote differential sensing for point-of-load accuracy, and automotive-grade thermal warning/shutdown behavior under transient load steps.
Technical Context
The LP87522ERNFRQ1 implements automatic PWM-to-PFM mode transition and dynamic phase adding/shedding (e.g., 1→2→3-phase at 1 A / 2 A / 3 A thresholds) to maximize efficiency across 0.1–9 A load range. Its four independent buck cores support configurable output grouping-specifically fixed 3+1 phase split-enabling optimized current sharing and reduced output ripple versus discrete solutions.
It integrates a 3.4 MHz I²C interface with programmable interrupt masking, GPIO-controlled enable sequencing, and internal current measurement (20 mA LSB, <10% accuracy >1 A). Remote differential feedback (FB_Bx pins used as ± sense) compensates for PCB IR drop, maintaining ±2% DC output accuracy at point-of-load under full load.
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 cold-crank margin. |
| Output Voltage Range | 0.6 V to 3.36 V in 5/10/20 mV steps - enables precise core voltage tuning for ADAS SoCs and DSPs. |
| Max Output Current | 9.0 A (3-phase rail) + 4.0 A (1-phase rail) - meets peak power demands of modern infotainment clusters and 77-GHz radar MMICs. |
| Switching Frequency | 1.8–2.2 MHz (typ. 2 MHz) - allows use of compact 0.47 µH inductors and reduces EMI filtering burden. |
| I²C Interface Speed | Up to 3.4 MHz (High-Speed mode) - enables fast register writes during dynamic voltage scaling sequences. |
| Thermal Protection | Die temperature warning at 115–135 °C (configurable), shutdown at 140–160 °C - ensures safe operation in sealed automotive enclosures. |
| Load Transient Response | ±3% output deviation for 0→8 A step (3-phase), ±40 mV for 0.1→8 A step (10 µs edge) - maintains processor stability during burst-mode execution. |
Pinout & Package
VQFN-HR (26-pin) package, 4.50 mm × 4.00 mm body size, with exposed thermal pad. Pin count and layout match LP8752x-Q1 family; pin functions are electrically validated per TI SNVSB23 datasheet.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SW_B0–SW_B3 | Buck switch node outputs | Four high-side/low-side FET nodes - SW_B0/B1/B2 form 3-phase rail; SW_B3 is dedicated 1-phase node. |
| FB_B0–FB_B3 | Voltage feedback inputs | Differential sensing capability: FB_B1/FB_B0 serve as ± inputs for BUCK0; FB_B3/FB_B2 for BUCK2 - enables remote POL compensation. |
| VIN_B0–VIN_B3 | Independent input power pins | Must be externally tied together and locally bypassed - prevents cross-regulator coupling and improves PSRR. |
| EN1/EN2/EN3 | Configurable GPIO/enable inputs | Support sequenced startup, dual-voltage selection, or external regulator control - critical for multi-rail SoC power-up. |
| PGOOD | Open-drain power-good indicator | Programmable threshold (±8–20 mV) and debounce (4 µs to 13 ms) - synchronizes system reset with stable output rails. |
| SDA/SCL | I²C bidirectional data/clock | Supports Standard (100 kHz), Fast+ (1 MHz), and High-Speed (3.4 MHz) modes - enables real-time telemetry and fault logging. |
Key Features
| Feature | Design Value |
|---|---|
| Configurable 3+1 phase topology | Fixed hardware partitioning eliminates firmware configuration overhead while optimizing current sharing and thermal distribution across three phases for main SoC rail and one dedicated rail for I/O or memory. |
| Remote differential voltage sensing | Uses paired FB pins (e.g., FB_B0/FB_B1) to measure true point-of-load voltage - corrects for up to 50 mΩ PCB trace resistance, ensuring ±2% regulation at load instead of at regulator output. |
| Programmable output slew rate | Adjustable from 0.47 to 10 mV/µs (via COUT-TOTAL setting) - prevents overshoot during startup and limits inrush current into large SoC decoupling banks. |
| Integrated current measurement | No external sense resistor required; 20 mA LSB resolution and <10% error >1 A - enables real-time load monitoring and predictive thermal management without BOM cost or board space penalty. |
| Automotive safety features | AEC-Q100 Grade 1 (−40°C to +125°C), HBM ±2 kV / CDM ±500 V, overtemperature warning + shutdown, OVP/UVP on VANA - satisfies ASIL-B functional safety requirements for non-safety-critical power rails. |
Applications
| Infotainment Application | Radar Processor Power |
|---|---|
|
Use Scenario: Powering quad-core ARM-based infotainment head unit with DDR3L memory and GPU. IC Role / Device Role / Timing Role: Primary 3-phase buck supplies 1.1 V @ 8 A to SoC core; 1-phase buck supplies 1.8 V @ 3 A to DDR3L interface. Use Value: Phase interleaving reduces input/output ripple by 3× vs single-phase, easing EMI filter design; I²C programmability enables dynamic voltage/frequency scaling during navigation vs media playback. |
Use Scenario: Supplying 77-GHz radar transceiver SoC with strict low-noise, fast-transient response requirements. IC Role / Device Role / Timing Role: 3-phase rail delivers 1.0 V @ 6 A to RF digital baseband; 1-phase rail delivers 1.2 V @ 2 A to analog front-end. Use Value: 10 µs load-step response (±3%) prevents timing jitter in ADC sampling clocks; remote sensing maintains 1.000 V ±10 mV at RF die bond pads despite 150 mΩ PCB resistance. |
| Instrument Cluster Display | ADAS Camera Module |
|
Use Scenario: Driving TFT-LCD display controller and graphics accelerator in digital instrument cluster. IC Role / Device Role / Timing Role: 3-phase buck powers 1.2 V @ 5 A application processor; 1-phase buck powers 3.3 V @ 1.5 A display interface and backlight driver. Use Value: Programmable PGOOD delay (up to 13 ms) aligns display initialization with GPU boot sequence; GPIO-controlled EN pins coordinate reset timing with MCU. |
Use Scenario: Powering 8-MP automotive camera SoC with ISP, MIPI CSI-2 transmitter, and image sensor interface. IC Role / Device Role / Timing Role: 3-phase rail supplies 0.9 V @ 4 A to ISP core; 1-phase rail supplies 1.8 V @ 1.2 A to MIPI PHY and sensor bias. Use Value: Spread-spectrum mode reduces conducted EMI in narrowband camera bands; thermal warning flag triggers ISP throttling before shutdown, preserving frame integrity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar multiphase buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LP87523ERNFRQ1 | Configured as one 2-phase + two 1-phase outputs - lacks 3-phase capability; identical pinout and I²C register map. | Suitable for systems needing independent 1.8 V, 1.2 V, and 1.0 V rails (e.g., multi-voltage camera modules), not high-current single-rail loads. | Select when rail count > phase count is prioritized over peak current density; no PCB change required but firmware must reconfigure phase mapping. |
| TPS65917B1RSLR | Single-chip PMIC with 4 buck + 5 LDOs; lower max current (4 A per buck); fixed 2-MHz switching; no remote sensing. | Targets lower-power infotainment (e.g., entry-level audio head units); integrates LDOs for auxiliary rails, reducing component count. | Choose when system requires mixed buck/LDO architecture and total power < 15 W; requires new layout due to different pinout and thermal pad geometry. |
Compared with LP87523ERNFRQ1, LP87522ERNFRQ1 delivers higher 3-phase current (9 A vs 8 A max) and better transient response for SoC cores, while TPS65917B1RSLR trades peak buck performance for integration density and LDO flexibility - making LP87522ERNFRQ1 optimal for radar/cluster applications demanding >6 A at <1.2 V with minimal output deviation.
Availability
LP87522ERNFRQ1 is available at Aetrix Electronics and suitable for automotive infotainment, radar processing, and digital instrument cluster applications requiring stable component supply, AEC-Q100 compliance, and long-term production continuity.
Supply support for LP87522ERNFRQ1 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 power management ICs, with decades of automotive qualification expertise.
The LP8752x-Q1 product line was designed specifically for next-generation automotive ADAS and infotainment platforms, delivering high-efficiency, configurable multiphase power conversion with integrated diagnostics and functional safety features.
FAQ
What is the maximum output current supported by LP87522ERNFRQ1 in its default 3+1 phase configuration?
The LP87522ERNFRQ1 delivers up to 9.0 A on its 3-phase rail (BUCK0–BUCK2) and 4.0 A on its dedicated 1-phase rail (BUCK3) when input voltage is ≥3 V. At 2.8–3.0 V input, the 3-phase rail is rated for 6.5 A and the 1-phase rail for 3.0 A - values confirmed in TI SNVSB23 Section 7.5, Table "IOUT Output current".
Does LP87522ERNFRQ1 support remote voltage sensing, and how is it implemented?
Yes, LP87522ERNFRQ1 supports true remote differential sensing using paired FB pins: FB_B0/FB_B1 serve as positive/negative inputs for BUCK0, and FB_B2/FB_B3 for BUCK2. This compensates for IR drop between the regulator output and point-of-load, maintaining ±2% DC accuracy at the load - a feature explicitly documented in the "Description" and "Pin Functions" sections of the SNVSB23 datasheet.
Can LP87522ERNFRQ1 be synchronized to an external clock, and what is the acceptable frequency range?
Yes, LP87522ERNFRQ1 accepts an external clock via the CLKIN pin, supporting nominal frequencies from 1 MHz to 24 MHz with ±30% tolerance. The device detects missing clock within 1.8 µs and switches to internal oscillator; clock-change delay is 600 µs. These parameters are specified in Section 7.5 "External Clock and PLL" of the SNVSB23 datasheet.
How does LP87522ERNFRQ1 handle thermal protection, and what are the configurable thresholds?
LP87522ERNFRQ1 provides two-tier thermal protection: die temperature warning (115–135 °C, configurable via TDIE_WARN_LEVEL bit) and thermal shutdown (140–160 °C). Both include 20 °C hysteresis. Warning triggers an interrupt; shutdown forces all regulators off. These values are measured at the die junction and are fully characterized per AEC-Q100 Grade 1 requirements in Section 7.5 "Protection Functions".
Is LP87522ERNFRQ1 pin-compatible with other devices in the LP8752x-Q1 family, and which ones share the same footprint?
Yes, LP87522ERNFRQ1 uses the VQFN-HR (26-pin) package with 4.50 mm × 4.00 mm body size - identical to LP87521-Q1, LP87523-Q1, LP87524-Q1, and LP87525-Q1. All share the same pinout and thermal pad layout, enabling drop-in replacement where phase configuration matches system requirements - as confirmed in the "Device Information" table and "Pin Configuration" section of SNVSB23.
LP87522ERNFRQ1 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):
- 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)
LP87522ERNFRQ1 FAQ
1.How can I place an order for LP87522ERNFRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for LP87522ERNFRQ1 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 LP87522ERNFRQ1 reliable?
The price and inventory of LP87522ERNFRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LP87522ERNFRQ1 is usually 5 days.
3.What payment methods are accepted for LP87522ERNFRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LP87522ERNFRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LP87522ERNFRQ1?
LP87522ERNFRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LP87522ERNFRQ1 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 LP87522ERNFRQ1?
For technical support, including LP87522ERNFRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LP87522ERNFRQ1 requirements.
6.How does Aetrix verify that LP87522ERNFRQ1 is sourced from the original manufacturer or authorized distributors?
All LP87522ERNFRQ1 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 LP87522ERNFRQ1 meets industry standards.
7.What is the process for return or replacement of LP87522ERNFRQ1?
All LP87522ERNFRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with LP87522ERNFRQ1, 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 LP87522ERNFRQ1 part is unused and in its original packaging.
Return procedure for LP87522ERNFRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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