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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Voltage Regulators - Linear + Switching

Texas Instruments LP87322FRHDRQ1

Name: LP87322FRHDRQ1
Brand: Texas Instruments
SKU: LP87322FRHDRQ1
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: LP87322FRHDRQ1

Manufacturer:: Texas Instruments

Category:: Voltage Regulators - Linear + Switching

Package:: 28-VFQFN Exposed Pad

Datasheet:: LP87322FRHDRQ1.pdf

Description:: LP87322F-Q1 AUTOMOTIVE DUAL 2A B

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Product details

Overview

LP87322FRHDRQ1 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), all in a single 5-mm × 5-mm VQFN package with wettable flanks. It supports I²C programmability, slew-rate-controlled startup/shutdown, spread-spectrum EMI reduction, and remote voltage sensing for point-of-load accuracy-designed specifically for automotive camera modules requiring tight transient response and robust thermal protection.

For engineers reviewing the LP87322FRHDRQ1 datasheet, LP87322FRHDRQ1 pinout, LP87322FRHDRQ1 application, or LP87322FRHDRQ1 equivalent, key selection criteria include its dual-buck + dual-LDO architecture, 2-MHz switching frequency with phase interleaving, programmable PGOOD timing, integrated overtemperature/overvoltage/short-circuit protection, and automotive-grade (-40°C to +125°C ambient) qualification.

Technical Context

The LP87322FRHDRQ1 implements two independent synchronous buck regulators with programmable output voltage (0.7–3.36 V), 2-MHz fixed-frequency PWM operation, and AUTO mode enabling seamless PWM/PFM transitions based on load current. Each buck includes dedicated feedback pins (FB_B0/FB_B1), separate input (VIN_B0/VIN_B1) and switch-node (SW_B0/SW_B1) terminals, and configurable current limiting (1.5–3 A forward limit).

Its dual LDOs accept 2.5–5.5 V input and deliver 0.8–3.3 V at up to 300 mA with <±2% DC accuracy, 53 dB PSRR at 10 kHz, and 82 µV_RMS noise. All regulation paths support remote sensing, programmable slew rates, and coordinated sequencing via I²C or EN signal-enabling precise power-up/down control in multi-rail automotive systems.

Key Specifications

Parameter	Value and Actual Design Meaning
Input Voltage Range	2.8–5.5 V for buck inputs (VIN_Bx/VANA); 2.5–5.5 V for LDO inputs-supports common automotive 3.3 V/5 V rails and battery-backed supplies.
Buck Output Voltage	0.7–3.36 V in programmable steps (10 mV below 0.73 V, 5 mV up to 1.4 V, 20 mV above)-covers core logic, memory, and interface rail requirements.
Buck Max Output Current	2 A per channel-sufficient for powering image signal processors (ISPs), SoCs, and high-speed SerDes in camera modules.
LDO Output Voltage	0.8–3.3 V programmable in 0.1-V steps-enables clean analog supply for sensors, ADCs, and clock buffers.
LDO Max Output Current	300 mA per channel-adequate for low-noise biasing of camera sensor analog front-ends and reference circuits.
Switching Frequency	1.8–2.2 MHz (typ. 2 MHz)-enables compact external components (0.47 µH inductors, ≤22 µF output caps) and avoids AM radio band interference.
Thermal Rating	AEC-Q100 Grade 1 (–40°C to +125°C ambient); junction limit 140°C with thermal warning at 115–135°C-ensures reliability in under-hood and dashboard environments.

Pinout & Package

LP87322FRHDRQ1 uses a 28-pin, 5.00 mm × 5.00 mm VQFN package with wettable flanks and exposed thermal pad-optimized for automotive PCB assembly and thermal dissipation in space-constrained camera ECUs.

Pin/Terminal	Circuit Role	Design Meaning
VIN_B0 / VIN_B1	Buck input power supply	Separate pins for each buck stage; must be connected externally to same supply node and locally bypassed-prevents cross-regulator coupling.
SW_B0 / SW_B1	Buck high-side/low-side switch node	Direct connection to external inductor; requires careful layout to minimize EMI and switching losses.
FB_B0 / FB_B1	Output voltage feedback	Remote sense capability compensates IR drop between regulator output and point-of-load-improves voltage accuracy at SoC pins.
VOUT_LDO0 / VOUT_LDO1	LDO regulated output	Low-noise outputs usable for analog sensor bias, clock generation, or reference voltage-no external pass transistor required.
EN	Global enable input	Active-high digital control for synchronized startup/shutdown of all regulators and GPO signals-enables system-level power sequencing.
nINT	Open-drain interrupt output	Signals fault conditions (OVP, UVLO, thermal warning, PGOOD failure)-reduces software polling overhead in safety-critical systems.
PGOOD	Power-good status indicator	Programmable gating time (800 µs) and ±40 mV monitoring window-ensures downstream logic only activates after stable rail establishment.
SCL / SDA	I²C serial interface	Supports Standard (100 kHz), Fast (400 kHz), Fast+ (1 MHz), and High-Speed (3.4 MHz) modes-enables real-time configuration and telemetry.

Key Features

Feature	Design Value
Spread-spectrum & phase interleaving	Reduces peak EMI by >10 dB across 150 kHz–1 GHz-meets CISPR-25 Class 5 requirements without added shielding or filtering.
Programmable output slew rate	0.47–10 mV/µs range (7 settings)-minimizes inrush current and output overshoot during startup/voltage changes, protecting downstream capacitors and ICs.
Remote voltage sensing	Dedicated FB pins with Kelvin connection support-compensates for PCB trace resistance, maintaining ±0.5% output accuracy at point-of-load.
Integrated protection suite	Includes overtemperature warning/shutdown (115–140°C), buck/LDO short-circuit detection (280–450 mV), VANA OVP/UVLO, and current-limiting-eliminates need for discrete protection circuitry.
Configurable GPO/GPO2	Two general-purpose outputs (CLKIN dual-function, GPO) synchronizable to EN-enables hardware-triggered reset, LED control, or inter-IC signaling without MCU intervention.

Applications

Automotive Camera Module	Surround View System ECU
Use Scenario: Powers image sensor, ISP, and serializer in front/rear/side ADAS cameras operating in engine bay or bumper locations. IC Role / Device Role / Timing Role: Dual-buck supplies core digital rails (1.2 V, 1.8 V); dual-LDOs provide clean analog bias (2.8 V, 3.3 V); I²C enables dynamic rail scaling during video capture modes. Use Value: Remote sensing maintains <±1% output accuracy at sensor die; spread-spectrum reduces EMI coupling into high-speed MIPI CSI-2 lanes.	Use Scenario: Supplies multiple camera ISPs and FPGA-based stitching units in 4-camera surround-view ECUs mounted near vehicle chassis. IC Role / Device Role / Timing Role: Coordinates power sequencing across four independent imaging chains using programmable startup delays and GPO-triggered resets. Use Value: Phase-interleaved buck operation lowers input ripple current by 30%, reducing bulk capacitor size and improving system-level efficiency.
Radar System ECU	Automotive Head Unit
Use Scenario: Delivers stable 1.0 V and 1.2 V rails to millimeter-wave radar SoCs and 3.3 V to RF front-end components in front-grille radar modules. IC Role / Device Role / Timing Role: Buck converters handle high-current digital cores; LDOs supply low-noise analog/RF sections; thermal warning flag alerts MCU before derating occurs. Use Value: 53 dB PSRR at 10 kHz suppresses switching noise from buck stages, preserving radar receiver sensitivity and SNR.	Use Scenario: Powers infotainment SoC, display controller, audio codec, and touch controller in center-stack head units with strict EMC and thermal constraints. IC Role / Device Role / Timing Role: Dual-buck supplies processor core/memory; dual-LDOs feed display interface and audio analog blocks; PGOOD ensures safe boot sequence. Use Value: Programmable slew rate prevents voltage droop on shared 5 V input rail during simultaneous SoC and display power-up.

Automotive Camera Module

Surround View System ECU

Use Scenario: Powers image sensor, ISP, and serializer in front/rear/side ADAS cameras operating in engine bay or bumper locations.

IC Role / Device Role / Timing Role: Dual-buck supplies core digital rails (1.2 V, 1.8 V); dual-LDOs provide clean analog bias (2.8 V, 3.3 V); I²C enables dynamic rail scaling during video capture modes.

Use Value: Remote sensing maintains <±1% output accuracy at sensor die; spread-spectrum reduces EMI coupling into high-speed MIPI CSI-2 lanes.

Use Scenario: Supplies multiple camera ISPs and FPGA-based stitching units in 4-camera surround-view ECUs mounted near vehicle chassis.

IC Role / Device Role / Timing Role: Coordinates power sequencing across four independent imaging chains using programmable startup delays and GPO-triggered resets.

Use Value: Phase-interleaved buck operation lowers input ripple current by 30%, reducing bulk capacitor size and improving system-level efficiency.

Radar System ECU

Automotive Head Unit

Use Scenario: Delivers stable 1.0 V and 1.2 V rails to millimeter-wave radar SoCs and 3.3 V to RF front-end components in front-grille radar modules.

IC Role / Device Role / Timing Role: Buck converters handle high-current digital cores; LDOs supply low-noise analog/RF sections; thermal warning flag alerts MCU before derating occurs.

Use Value: 53 dB PSRR at 10 kHz suppresses switching noise from buck stages, preserving radar receiver sensitivity and SNR.

Use Scenario: Powers infotainment SoC, display controller, audio codec, and touch controller in center-stack head units with strict EMC and thermal constraints.

IC Role / Device Role / Timing Role: Dual-buck supplies processor core/memory; dual-LDOs feed display interface and audio analog blocks; PGOOD ensures safe boot sequence.

Use Value: Programmable slew rate prevents voltage droop on shared 5 V input rail during simultaneous SoC and display power-up.

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
LP87322ERHDRQ1	Buck1 output fixed at 1.35 V (vs. LP87322FRHDRQ1's 1.50 V); identical LDOs, package, and feature set.	Targeted at systems requiring 1.35 V core rail (e.g., certain TI Jacinto processors); not suitable where 1.5 V is mandated by SoC spec.	Select LP87322ERHDRQ1 only when 1.35 V matches target processor VDD_CORE requirement-otherwise LP87322FRHDRQ1 ensures correct 1.5 V compliance.
TPS65910A3RSLR	Triple buck + triple LDO; lower max buck current (1.5 A); no spread-spectrum; different I²C register map and pinout.	Broad automotive infotainment use; lacks phase interleaving and remote sensing-less optimal for high-EMI camera/radar applications.	Choose TPS65910A3RSLR for cost-sensitive head units with simpler rail counts; LP87322FRHDRQ1 remains preferred for EMI-critical camera/radar designs requiring 2 A buck current and advanced noise suppression.

Compared with LP87322ERHDRQ1, LP87322FRHDRQ1 provides a higher fixed 1.5 V buck output essential for newer vision SoCs, while both share identical thermal performance, protection features, and sequencing flexibility. Against TPS65910A3RSLR, LP87322FRHDRQ1 delivers superior EMI control, higher current capability, and tighter output accuracy-justifying its use in demanding ADAS domains.

Availability

LP87322FRHDRQ1 is available at Aetrix Electronics and suitable for automotive camera modules, surround-view ECUs, and radar system power delivery requiring stable component supply, AEC-Q100 compliance, and long-term production continuity.

Supply support for LP87322FRHDRQ1 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 electronics-with decades of expertise in high-reliability power management solutions.

The LP87322-Q1 product line was designed specifically for automotive vision and radar systems, integrating tightly coupled buck-LDO architectures, advanced EMI mitigation, and AEC-Q100 Grade 1 qualification to meet stringent functional safety and thermal demands.

FAQ

What is the fixed output voltage of the primary buck converter in LP87322FRHDRQ1?

The LP87322FRHDRQ1 has Buck1 (B0) configured for a fixed 1.50 V output-verified in TI's device comparison table and confirmed by orderable part number suffix "F". This setting targets core voltage requirements of modern automotive image signal processors and radar SoCs, and cannot be reprogrammed to other values without changing to a different variant like LP87322ERHDRQ1 (1.35 V) or LP87322DRHDRQ1 (1.8 V).

Does LP87322FRHDRQ1 support remote voltage sensing for its buck regulators?

Yes, LP87322FRHDRQ1 supports remote voltage sensing via dedicated FB_B0 and FB_B1 pins. As documented in Section 7.3, this feature compensates for IR drop between the regulator output and point-of-load, improving output voltage accuracy at the load-critical for maintaining stable operation of sensitive image sensors and high-speed SerDes interfaces in automotive camera modules.

What protection features are integrated into LP87322FRHDRQ1?

LP87322FRHDRQ1 integrates comprehensive protection: overtemperature warning (115–135°C) and shutdown (140–160°C), VANA 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 supervision ICs in automotive ECU designs.

Can LP87322FRHDRQ1 synchronize its switching frequency to an external clock?

Yes, LP87322FRHDRQ1 supports external clock synchronization via the CLKIN pin (dual-function as GPO2). As specified in Section 6.5, it accepts 1–24 MHz external clocks with ±30% accuracy tolerance, enabling EMI reduction through frequency dithering or alignment with system master clocks-particularly valuable in multi-IC radar or camera clusters where switching harmonics must be de-correlated.

Is LP87322FRHDRQ1 qualified for automotive temperature grade 1 operation?

Yes, LP87322FRHDRQ1 is AEC-Q100 qualified for Grade 1 with –40°C to +125°C ambient operating temperature and 140°C maximum junction temperature. This qualification is explicitly stated in the Features section and validated across all electrical characteristics in Section 6.5-ensuring reliable operation in under-hood, dashboard, and exterior-mounted camera and radar applications.

LP87322FRHDRQ1 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)

LP87322FRHDRQ1 FAQ

1.How can I place an order for LP87322FRHDRQ1 through Aetrix?

Please submit a Request for Quotation (RFQ) for LP87322FRHDRQ1 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 LP87322FRHDRQ1 reliable?

The price and inventory of LP87322FRHDRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LP87322FRHDRQ1 is usually 5 days.

3.What payment methods are accepted for LP87322FRHDRQ1?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LP87322FRHDRQ1 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for LP87322FRHDRQ1?

LP87322FRHDRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your LP87322FRHDRQ1 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 LP87322FRHDRQ1?

For technical support, including LP87322FRHDRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LP87322FRHDRQ1 requirements.

6.How does Aetrix verify that LP87322FRHDRQ1 is sourced from the original manufacturer or authorized distributors?

All LP87322FRHDRQ1 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 LP87322FRHDRQ1 meets industry standards.

7.What is the process for return or replacement of LP87322FRHDRQ1?

All LP87322FRHDRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with LP87322FRHDRQ1, 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 LP87322FRHDRQ1 part is unused and in its original packaging.

Return procedure for LP87322FRHDRQ1:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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