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Texas Instruments LP873222RHDRQ1
- Part No.:
- LP873222RHDRQ1
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Regulators - Linear + Switching
- Package:
- 28-VFQFN Exposed Pad
- Datasheet:
-
LP873222RHDRQ1.pdf
- Description:
- IC REG QUAD BUCK/LNR 2MHZ 28VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,197
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Product details
Overview
LP873222RHDRQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive power management IC integrating two high-current buck converters (2 A each) and two linear regulators (300 mA each), operating from 2.8 V to 5.5 V input, with programmable slew rate (0.5–10 mV/µs), 2-MHz switching frequency, and I²C control - deployed in automotive head units, camera modules, and radar ECUs.
For engineers reviewing the LP873222RHDRQ1 datasheet, LP873222RHDRQ1 pinout, LP873222RHDRQ1 application, or LP873222RHDRQ1 equivalent, key selection considerations include dual-buck + dual-LDO integration, automotive-grade thermal and EMI performance (spread-spectrum + phase interleaving), remote sensing capability, and configurable power sequencing via GPO signals synchronized to EN.
Technical Context
The LP873222RHDRQ1 implements two independent synchronous buck regulators with integrated high-side/low-side FETs (RDS(ON) HS: 50–110 mΩ; LS: 45–90 mΩ), supporting AUTO (PWM/PFM) mode for wide-load efficiency, forced PWM, and external clock synchronization. Each buck features programmable current limit (1.5–3 A), soft-start, and transient response optimized for ±55 mV load step (0.1–2 A, 400 ns edge).
Its dual LDOs deliver 0.8–3.3 V outputs with <±2% DC accuracy, 82 µVrms noise, 53 dB PSRR at 10 kHz, and fast transient response (±50/+40 mV for 1 mA → 300 mA). All regulators support remote voltage sensing, overtemperature warning (115–147 °C configurable), shutdown (140–160 °C), and independent PGOOD monitoring with deglitching (4–15 µs).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.8 V to 5.5 V for buck inputs; 2.5 V to 5.5 V for LDO inputs - supports wide automotive battery rail variation including cold-crank conditions. |
| Buck Output Current | 2 A per channel - sufficient to power SoCs, image sensors, or FPGA core rails without external boost stages. |
| LDO Output Current | 300 mA per channel - enables clean biasing of analog front-ends, SerDes, or MCU I/O domains. |
| Switching Frequency | 1.8 MHz to 2.2 MHz - allows compact 0.47 µH inductors and reduces EMI fundamental below critical bands. |
| Output Voltage Accuracy | ±2% for buck (≥1 V), ±20 mV for LDO (<1 V) - ensures stable operation of voltage-sensitive processors and ADC references. |
| Thermal Rating | AEC-Q100 Grade 1 (−40 °C to +125 °C ambient); junction max 140 °C - validated for under-hood and infotainment module deployment. |
| I²C Interface Speed | Supports Standard (100 kHz), Fast (400 kHz), Fast+ (1 MHz), and High-Speed (3.4 MHz) modes - enables real-time dynamic voltage scaling and fault reporting. |
Pinout & Package
LP873222RHDRQ1 uses a 28-pin, 5.0 mm × 5.0 mm VQFN package with wettable flanks and exposed thermal pad - optimized for automotive PCB assembly and thermal dissipation (RθJA = 36.7 °C/W, RθJB = 8.9 °C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN_B0, VIN_B1 | Buck input power pins | Separate, non-internal-connected inputs requiring local bypassing; must be tied externally to same supply node as VANA. |
| SW_B0, SW_B1 | Buck switch nodes | Connect to external inductors; floating if corresponding buck is disabled - no internal clamping diodes. |
| FB_B0, FB_B1 | Buck feedback inputs | High-impedance analog inputs for remote sensing; enable point-of-load regulation accuracy compensation for IR drop. |
| VOUT_LDO0, VOUT_LDO1 | LDO output terminals | Deliver regulated outputs; must be decoupled with ≥0.4 µF ceramic capacitors (COUT_LDO) and ≥2× that value at input (CIN_LDO). |
| EN | Global enable input | Active-high digital control initiating full power-up sequence with programmable delays and GPO synchronization. |
| nINT, PGOOD, GPO, CLKIN | Digital I/O signals | Open-drain interrupt (nINT), push-pull/open-drain PGOOD, configurable GPO, and dual-function CLKIN/GPO2 - support system-level fault handling and timing coordination. |
Key Features
| Feature | Design Value |
|---|---|
| Spread-spectrum + phase interleaving | Reduces peak EMI by >10 dB across 150 kHz–1 GHz band - meets CISPR-25 Class 5 requirements without added shielding. |
| Programmable output slew rate | 0.47–10 mV/µs range (7 settings) - minimizes inrush current and output overshoot during startup/voltage transitions. |
| Remote voltage sensing | Compensates for PCB trace IR drop between regulator output and load - maintains ±0.5% effective output accuracy at point-of-load. |
| Configurable thermal warning & shutdown | Die temperature thresholds user-selectable (115–147 °C warning; 140–160 °C shutdown) with 20 °C hysteresis - enables graceful system derating before failure. |
| I²C-controlled power sequencing | Start-up/shutdown delays and GPO timing fully programmable via register map - eliminates need for external sequencer ICs in multi-rail systems. |
Applications
| Automotive Head Unit | Camera Module Power |
|---|---|
Use Scenario: Central infotainment processor (e.g., TDA4VM) requiring multiple independent rails: 1.0 V core, 1.8 V memory, 3.3 V I/O, and 1.2 V analog. IC Role / Device Role / Timing Role: Primary PMIC delivering all main domain supplies with coordinated sequencing, remote sensing, and real-time fault reporting via I²C. Use Value: Reduces BOM count by consolidating four regulators into one AEC-Q100-qualified device while maintaining <±2% rail accuracy under dynamic load. |
Use Scenario: Front-facing ADAS camera with CMOS image sensor, ISP, and serializer needing low-noise, tightly regulated supplies. IC Role / Device Role / Timing Role: Supplies 1.2 V sensor core (buck), 2.8 V analog (LDO), 1.8 V ISP (buck), and 3.3 V serializer (LDO) with independent PGOOD monitoring. Use Value: LDO noise (82 µVrms) prevents image artifacts; buck efficiency (>90% at 1 A) extends thermal margin in sealed camera housing. |
| Surround View ECU | Radar System ECU |
Use Scenario: Multi-camera fusion controller processing up to four 1080p streams, demanding low-latency power state transitions. IC Role / Device Role / Timing Role: Enables fast, synchronized power-up/down of all camera interfaces using GPO signals timed to EN assertion and voltage ramp completion. Use Value: Programmable slew rate (1.9–10 mV/µs) limits inrush to <1.5 A during simultaneous rail activation - avoids brownout on shared 5 V supply. |
Use Scenario: 77-GHz radar transceiver (e.g., AWR2944) requiring ultra-stable 1.0 V core, 1.2 V PLL, and 3.3 V interface rails. IC Role / Device Role / Timing Role: Provides isolated, low-noise LDOs for RF/analog sections and high-efficiency bucks for digital cores, with external clock sync to minimize jitter coupling. Use Value: External clock synchronization (1–24 MHz) locks buck switching to system master clock - suppresses beat frequencies that degrade radar SNR. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar automotive power management applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS653211A-Q1 | Single 3-A buck + triple LDO; no spread-spectrum; lower integration density; lacks remote sensing. | Better suited for simpler single-SoC systems without multi-rail sequencing needs. | Select when only one high-current rail is required and cost-per-rail optimization outweighs integration benefits. |
| LP873220RHDRQ1 | Same family, but dual-buck only (no LDOs); identical buck specs, package, and pinout - pin-compatible subset. | Used where external LDOs already exist or noise-sensitive analog rails are handled separately. | Choose when LDO functionality is unnecessary and board space allows discrete LDO placement. |
Compared with TPS653211A-Q1 and LP873220RHDRQ1, the LP873222RHDRQ1 uniquely combines dual 2-A bucks, dual 300-mA LDOs, remote sensing, and spread-spectrum EMI reduction in a single AEC-Q100 Grade 1 package - making it optimal for complex, space-constrained automotive vision and radar ECUs requiring full rail autonomy.
Availability
LP873222RHDRQ1 is available at Aetrix Electronics and suitable for automotive head units, camera modules, and radar ECUs requiring stable component supply, long-term lifecycle support, and AEC-Q100-compliant traceability.
Supply support for LP873222RHDRQ1 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 leadership in automotive power management and functional safety solutions.
The LP873222RHDRQ1 belongs to TI's automotive-grade PMIC portfolio designed specifically for ADAS and infotainment systems - emphasizing high integration, EMI robustness, thermal resilience, and ASIL-ready diagnostics.
FAQ
What is the maximum supported input voltage for LP873222RHDRQ1 buck regulators?
The LP873222RHDRQ1 buck regulators accept an input voltage range of 2.8 V to 5.5 V on VIN_B0 and VIN_B1 pins. Absolute maximum rating is 6 V, but operation above 5.5 V violates recommended conditions and may trigger overvoltage protection on the VANA rail. The device requires VIN_Bx and VANA to be connected to the same supply node.
Does LP873222RHDRQ1 support remote voltage sensing for its buck outputs?
Yes, LP873222RHDRQ1 supports remote voltage sensing via dedicated FB_B0 and FB_B1 pins. This feature compensates for IR drop between the regulator output and point-of-load, improving effective output voltage accuracy to within ±0.5% at the load - critical for powering voltage-sensitive processors and ADCs in automotive systems.
How does the LP873222RHDRQ1 handle thermal protection?
The LP873222RHDRQ1 provides configurable thermal warning (115–147 °C, user-selectable) and thermal shutdown (140–160 °C) with 20 °C hysteresis. Warning triggers an interrupt via nINT; shutdown disables all regulators. These thresholds are set via registers and remain active across all operating modes, including standby.
Can LP873222RHDRQ1 synchronize its switching frequency to an external clock?
Yes, LP873222RHDRQ1 accepts an external clock signal (1–24 MHz) on the CLKIN pin to synchronize buck switching. This minimizes beat frequencies in multi-PMIC systems and reduces EMI coupling into sensitive RF or imaging circuits - a key requirement in radar and camera modules.
What are the I²C timing capabilities of LP873222RHDRQ1?
LP873222RHDRQ1 supports I²C Standard (100 kHz), Fast (400 kHz), Fast+ (1 MHz), and High-Speed (3.4 MHz) modes. Timing parameters are guaranteed across temperature and voltage, with rise/fall times specified down to 10 ns for High-Speed mode - enabling fast configuration updates and real-time telemetry in automotive networks.
LP873222RHDRQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 28-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- 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:
- 2.8V ~ 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)
LP873222RHDRQ1 FAQ
1.How can I place an order for LP873222RHDRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for LP873222RHDRQ1 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 LP873222RHDRQ1 reliable?
The price and inventory of LP873222RHDRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LP873222RHDRQ1 is usually 5 days.
3.What payment methods are accepted for LP873222RHDRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LP873222RHDRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LP873222RHDRQ1?
LP873222RHDRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LP873222RHDRQ1 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 LP873222RHDRQ1?
For technical support, including LP873222RHDRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LP873222RHDRQ1 requirements.
6.How does Aetrix verify that LP873222RHDRQ1 is sourced from the original manufacturer or authorized distributors?
All LP873222RHDRQ1 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 LP873222RHDRQ1 meets industry standards.
7.What is the process for return or replacement of LP873222RHDRQ1?
All LP873222RHDRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with LP873222RHDRQ1, 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 LP873222RHDRQ1 part is unused and in its original packaging.
Return procedure for LP873222RHDRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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