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Texas Instruments LP87322ERHDRQ1
- Part No.:
- LP87322ERHDRQ1
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Regulators - Linear + Switching
- Package:
- 28-VFQFN Exposed Pad
- Datasheet:
-
LP87322ERHDRQ1.pdf
- Description:
- LP87322E-Q1 AUTOMOTIVE DUAL 2A B
- Quantity:
- Payment:
- Shipping:
Inventory:9,185
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Product details
Overview
LP87322ERHDRQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive power management IC integrating two high-current buck converters (2 A each, 0.7–3.36 V) and two linear regulators (300 mA each, 0.8–3.3 V), controlled via I²C and EN signal, designed for camera and radar ECU power rails.
For engineers reviewing the LP87322ERHDRQ1 datasheet, LP87322ERHDRQ1 pinout, LP87322ERHDRQ1 application, or LP87322ERHDRQ1 equivalent, key selection factors include programmable slew rate (0.47–10 mV/µs), spread-spectrum/phase-interleaved EMI reduction, remote voltage sensing, and integrated overtemperature/overvoltage/short-circuit protection.
Technical Context
The LP87322ERHDRQ1 implements dual synchronous buck regulators with auto PWM/PFM mode switching and configurable current limits (1.5–3 A), plus dual LDOs with 82 µVrms noise and 53 dB PSRR at 10 kHz. It supports external clock synchronization (1–24 MHz) and internal PLL for jitter-controlled timing.
Its I²C interface (up to 3.4 MHz) enables full register-based configuration of startup/shutdown sequencing, PGOOD thresholds, interrupt masking, and GPO/GPO2 timing-critical for deterministic power-up in ADAS domain controllers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.8–5.5 V for bucks/VANA; 2.5–5.5 V for LDO inputs - supports wide automotive battery range including cold-crank transients. |
| Buck Output Current | 2 A per channel - sufficient to power SoCs, image sensors, and radar MMICs without external boost stages. |
| LDO Output Current | 300 mA per channel - suitable for low-noise analog supplies (e.g., SerDes PHY, ADC reference). |
| Switching Frequency | 1.8–2.2 MHz (PWM mode) - enables compact 0.47 µH inductors and avoids AM radio band interference. |
| Output Slew Rate | Programmable 0.47–10 mV/µs - minimizes inrush current and output overshoot during voltage transitions. |
| Thermal Protection | Overtemperature warning at 115–135°C (configurable); shutdown at 140–160°C - ensures safe operation in sealed ECU enclosures. |
| I²C Speed Support | Up to 3.4 MHz (High-Speed mode) - enables fast register writes for dynamic voltage scaling in real-time systems. |
Pinout & Package
LP87322ERHDRQ1 uses a 28-pin, 5.0 mm × 5.0 mm VQFN package with wettable flanks and exposed thermal pad for enhanced PCB heat dissipation in automotive under-hood environments.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN_B0 / VIN_B1 | Buck input supply pins | Separate high-current inputs for each buck; must be locally bypassed and tied together externally - prevents cross-regulator coupling. |
| SW_B0 / SW_B1 | Buck switch node outputs | Connect to external inductor; floating if unused - requires careful layout to minimize EMI and ringing. |
| FB_B0 / FB_B1 | Buck feedback inputs | Support remote sensing - compensates IR drop to maintain ±2% DC accuracy at point-of-load. |
| VOUT_LDO0 / VOUT_LDO1 | LDO regulated outputs | Low-noise 0.8–3.3 V supplies; pulldown resistance 150–350 Ω when disabled - prevents floating bias in standby. |
| SCL / SDA | I²C serial interface | Supports Standard/Fast/Fast+/High-Speed modes; requires external pullups - enables firmware-configurable power sequencing. |
| nINT / PGOOD / GPO / CLKIN | Digital I/O signals | Open-drain interrupt, push-pull power-good, programmable GPO, and dual-function CLKIN/GPO2 - provides system-level status and control signaling. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for −40°C to +125°C ambient operation - meets automotive head unit, camera, and radar ECU thermal requirements. |
| Spread-spectrum + phase interleaving | Reduces peak EMI by >10 dB compared to fixed-frequency operation - simplifies EMC compliance in dense PCB layouts. |
| Programmable startup/shutdown sequencing | GPO signals synchronized to EN enable precise timing control of downstream rails - eliminates race conditions in multi-rail systems. |
| Remote voltage sensing (RVS) | Compensates up to 100 mΩ trace resistance between regulator and load - maintains ±0.5% regulation accuracy at point-of-load. |
| Integrated protection suite | Includes OVP, UVLO, short-circuit detection (280–440 mV buck threshold), and thermal warning/shutdown - eliminates need for discrete fault management circuitry. |
Applications
| Automotive Camera Module | Surround View System ECU |
|---|---|
|
Use Scenario: Powers image sensor, ISP, and SerDes transmitter in rear-view or side-mirror camera modules. IC Role / Device Role / Timing Role: Dual-buck supplies core logic (1.1 V) and I/O (1.8 V); LDOs deliver clean 2.8 V for analog front-end and 1.2 V for MIPI PHY. Use Value: Programmable slew rate prevents sensor reset during power-up; remote sensing ensures stable voltage at sensor die despite long flex traces. |
Use Scenario: Manages power for four-camera fusion controller with real-time stitching and display output. IC Role / Device Role / Timing Role: Coordinates sequenced enable of CPU core, memory, GPU, and LVDS display driver using GPOs and PGOOD chaining. Use Value: I²C-configurable startup delays eliminate manual hardware timing adjustments; spread-spectrum reduces EMI coupling into video signal paths. |
| Radar System ECU | Automotive Head Unit |
|
Use Scenario: Supplies RF MMIC, DSP, and CAN-FD interface in 77 GHz forward radar module. IC Role / Device Role / Timing Role: Buck converters power DSP core (1.0 V) and I/O (1.8 V); LDOs provide low-noise 3.3 V for CAN transceiver and 1.2 V for ADC reference. Use Value: 82 µVrms LDO noise prevents spurious tones in radar IF chain; thermal warning flag triggers derating before shutdown. |
Use Scenario: Delivers multiple rails for infotainment SoC, touchscreen controller, audio codec, and USB-C PD negotiation. IC Role / Device Role / Timing Role: Enables independent voltage scaling of CPU, GPU, and memory domains; GPO2 used as clock source for audio PLL. Use Value: External clock sync (1–24 MHz) allows alignment with audio master clock - eliminates beat frequencies in high-fidelity playback. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-buck + dual-LDO automotive power management applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LP87322FRHDRQ1 | Buck1 output fixed at 1.5 V (vs. 1.35 V for LP87322ERHDRQ1); identical pinout, features, and package. | Requires revalidation if system relies on exact 1.35 V rail for sensor bias or FPGA I/O bank. | Select LP87322FRHDRQ1 only when 1.5 V is required for primary processor core voltage. |
| LP87322DRHDRQ1 | Buck1 output fixed at 1.8 V; same thermal performance and protection features; preview status (samples available). | Not recommended for production where 1.35 V rail is mandatory for DDR I/O or specific image sensor compatibility. | Use LP87322DRHDRQ1 for prototyping 1.8 V SoC platforms; verify availability timeline before committing to production. |
Compared with LP87322FRHDRQ1 and LP87322DRHDRQ1, the LP87322ERHDRQ1 offers the unique 1.35 V buck output optimized for modern automotive image sensors and low-voltage FPGAs, while maintaining full functional and pin compatibility across the LP87322x-Q1 family.
Availability
LP87322ERHDRQ1 is available at Aetrix Electronics and suitable for automotive camera modules, surround-view ECUs, and radar systems requiring stable component supply with AEC-Q100 qualification and long-term automotive lifecycle support.
Supply support for LP87322ERHDRQ1 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 power management solutions for automotive, industrial, and communications markets.
The LP87322x-Q1 product line delivers highly integrated, AEC-Q100-qualified PMICs targeting next-generation ADAS camera and radar ECUs, emphasizing EMI robustness, thermal resilience, and flexible I²C programmability.
FAQ
What is the fixed output voltage of the Buck1 regulator in LP87322ERHDRQ1?
The LP87322ERHDRQ1 has Buck1 configured to a fixed 1.35 V output voltage, as specified in the device comparison table. This value is factory-programmed and not user-adjustable via I²C registers. The LP87322ERHDRQ1's 1.35 V rail is optimized for image sensor I/O and low-voltage FPGA banks commonly found in automotive camera modules.
Does LP87322ERHDRQ1 support remote voltage sensing for its buck regulators?
Yes, LP87322ERHDRQ1 supports remote voltage sensing via dedicated FB_B0 and FB_B1 pins. This feature compensates for IR drop across PCB traces between the regulator output and point-of-load, maintaining ±2% DC output accuracy even with up to 100 mΩ trace resistance - critical for stable power delivery to sensitive image sensors and radar DSPs.
What protection features are integrated into LP87322ERHDRQ1?
LP87322ERHDRQ1 integrates comprehensive protection: overtemperature warning (115–135°C) and shutdown (140–160°C), input overvoltage (5.6–6.1 V) and undervoltage lockout (2.51–2.75 V), buck short-circuit detection (280–440 mV), LDO short-circuit detection (190–450 mV), and programmable PGOOD monitoring with deglitching. These eliminate need for external fault management components.
Can LP87322ERHDRQ1 synchronize its switching frequency to an external clock?
Yes, LP87322ERHDRQ1 accepts an external clock input (1–24 MHz) on the CLKIN pin to synchronize buck switching frequency. This capability minimizes beat frequencies and EMI peaks in multi-PMIC systems - especially valuable in radar ECUs where spectral purity directly impacts detection sensitivity and false-alarm rate.
What is the maximum supported I²C bus speed for LP87322ERHDRQ1 configuration?
LP87322ERHDRQ1 supports I²C High-Speed mode up to 3.4 MHz (with 100 pF bus capacitance), enabling rapid register writes for dynamic voltage scaling and real-time fault response. This exceeds standard Fast Mode+ (1 MHz), reducing configuration latency in safety-critical ADAS applications where power state transitions must complete within strict time budgets.
LP87322ERHDRQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 28-VFQFN Exposed Pad
- Packaging:
- Bulk
- Product Status:
- Active
- Topology:
- Step-Down (Buck) (2), Linear (LDO) (2)
- Number of Outputs:
- 4
- Frequency - Switching:
- 2MHz
- Voltage/Current - Output 1:
- 0.7V ~ 3.36V, 2A
- Voltage/Current - Output 2:
- 0.7V ~ 3.36V, 2A
- Voltage/Current - Output 3:
- 0.8V ~ 3.3V, 300mA
- w/LED Driver:
- No
- w/Supervisor:
- No
- w/Sequencer:
- No
- Voltage - Supply:
- 2.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount, Wettable Flank
- Supplier Device Package:
- 28-VQFN (5x5)
LP87322ERHDRQ1 FAQ
1.How can I place an order for LP87322ERHDRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for LP87322ERHDRQ1 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 LP87322ERHDRQ1 reliable?
The price and inventory of LP87322ERHDRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LP87322ERHDRQ1 is usually 5 days.
3.What payment methods are accepted for LP87322ERHDRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LP87322ERHDRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LP87322ERHDRQ1?
LP87322ERHDRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LP87322ERHDRQ1 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 LP87322ERHDRQ1?
For technical support, including LP87322ERHDRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LP87322ERHDRQ1 requirements.
6.How does Aetrix verify that LP87322ERHDRQ1 is sourced from the original manufacturer or authorized distributors?
All LP87322ERHDRQ1 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 LP87322ERHDRQ1 meets industry standards.
7.What is the process for return or replacement of LP87322ERHDRQ1?
All LP87322ERHDRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with LP87322ERHDRQ1, 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 LP87322ERHDRQ1 part is unused and in its original packaging.
Return procedure for LP87322ERHDRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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