My Inquiry
My Account
Texas Instruments P87702DRHBRQ1
- Part No.:
- P87702DRHBRQ1
- Manufacturer:
- Texas Instruments
- Package:
- -
- Datasheet:
-
P87702DRHBRQ1.pdf
- Description:
- IC REG BOOST AND DUAL BUCK REGUL
- Quantity:
- Payment:
- Shipping:
Inventory:4,949
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LP87702DRHBRQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive power management IC integrating two high-efficiency buck converters (3.5-A max each), a 5-V boost converter (600-mA max), dual external voltage monitoring inputs, programmable power-good signals, window watchdog with reset output, and comprehensive protection including overtemperature, OVP/UVLO, short-circuit, and overload detection. It serves as the primary power sequencer and safety monitor in radar and camera ECU designs.
For engineers reviewing the LP87702DRHBRQ1 datasheet, LP87702DRHBRQ1 pinout, LP87702DRHBRQ1 application, or LP87702DRHBRQ1 equivalent, this device supports I²C interface up to 3.4 MHz, spread-spectrum modulation, remote sensing for ±0.7 V to 3.36 V buck outputs, and synchronized start-up/shutdown sequencing - critical for ASIL-B–capable ADAS subsystems.
Technical Context
The LP87702DRHBRQ1 implements dual independent buck regulators with auto PWM/PFM mode switching and configurable 2/3/4-MHz switching frequencies, plus a dedicated 5-V boost stage supporting both boost and bypass modes. Its diagnostic architecture includes two analog voltage monitoring inputs (VMON1/VMON2), a dedicated reference voltage rail (VANA), and a window watchdog with WDI input and WD_RESET output.
It features programmable slew-rate control for soft-start/soft-stop, OTP-configured startup sequences, and integrated current measurement (±10% accuracy) for buck outputs. All regulation, monitoring, and protection functions are accessible and configurable via a high-speed I²C interface supporting Standard, Fast, Fast+, and High-Speed modes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Buck Output Current | 3.5 A per channel - supports high-current FPGA, SoC, or sensor core rails without external MOSFETs |
| Boost Output | 5 V @ 600 mA - powers radar transceivers or camera ISPs requiring stable 5-V supply |
| Switching Frequency | 2/3/4 MHz - enables compact 0.47-µH inductors and reduces EMI in dense PCB layouts |
| I²C Speed Support | Up to 3.4 MHz - allows fast register access for real-time fault response and dynamic voltage scaling |
| Operating Temp Range | −40°C to +125°C (TA) - meets AEC-Q100 Grade 1 requirements for under-hood automotive use |
| Voltage Monitoring Inputs | Two independent VMON pins with ±1% to ±7% programmable windows - validates external LDOs or battery rails |
| Protection Features | Overtemperature warning (115–150°C), shutdown (140–160°C), OVP/UVLO, short-circuit, and load overload - enables fail-safe system behavior |
Pinout & Package
The LP87702DRHBRQ1 is housed in a thermally enhanced 32-pin VQFN package (5.00 mm × 5.00 mm) with exposed thermal pad for efficient heat dissipation in automotive environments.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| EN1 | Programmable Enable Input | Primary hardware enable signal controlling all converters and diagnostics; active-high, Schmitt-triggered |
| FB_B0 / FB_B1 | Buck Feedback Inputs | Analog inputs for closed-loop voltage regulation; support remote sensing to compensate PCB IR drop |
| PG0 / PG1 | Programmable Power-Good Outputs | Open-drain or push-pull outputs indicating regulated output stability; configurable per rail |
| VMON1 / VMON2 | External Voltage Monitoring Inputs | Analog inputs for monitoring auxiliary supplies (e.g., 12-V domain, CAN transceiver rail) |
| WDI / WD_RESET | Window Watchdog Interface | Digital watchdog input and reset output - ensures firmware liveness and triggers safe state entry on timeout |
| SCL / SDA | I²C Serial Interface | Standard-compliant bidirectional bus supporting 100 kHz–3.4 MHz; enables full configuration and fault logging |
| VOUT_BST | Boost Output | 5-V regulated output; also functions as bypass switch output when VIN ≥ 4.5 V |
| SW_B0 / SW_B1 / SW_BST | Switch Node Terminals | High-frequency switching nodes connecting to external inductors and catch diodes/FETs |
Key Features
| Feature | Design Value |
|---|---|
| Auto PWM/PFM Mode | Maintains >85% efficiency across 1 mA–3.5 A load range - eliminates manual mode selection and optimizes light-load quiescent current |
| Programmable Slew Rate | Configurable 0.47–15 mV/µs output ramp rate - prevents inrush current and output overshoot during power sequencing |
| Spread-Spectrum Modulation | Reduces peak EMI by ±1% frequency dithering - simplifies compliance with CISPR 25 Class 5 radiated emissions limits |
| Dedicated VANA Rail | Separate 2.8–5.5 V analog supply - isolates sensitive ADCs, references, and comparators from noisy digital/switching domains |
| OTP Configuration | One-time-programmable memory stores default startup sequence, voltage targets, and protection thresholds - eliminates boot-time I²C initialization |
Applications
| Automotive Radar ECU | ADAS Camera Module |
|---|---|
Use Scenario: Powers 77-GHz radar SoC, RF front-end, and microcontroller in compact front-bumper module. IC Role / Device Role / Timing Role: Primary power sequencer and functional safety monitor - regulates 1.0-V core, 1.8-V I/O, and 5-V RF supply while validating external 12-V input. Use Value: Integrated window watchdog and dual voltage monitors satisfy ISO 26262 ASIL-B diagnostic coverage requirements without external components. |
Use Scenario: Supplies image sensor, ISP, and video encoder in rear-view or surround-view camera housing. IC Role / Device Role / Timing Role: Dual-buck regulator with remote sensing delivers precise 1.2-V and 2.8-V rails; boost stage powers 5-V USB-C or MIPI PHY. Use Value: Programmable start-up delays ensure sensor power-up precedes ISP clock enable - eliminating initialization glitches and frame drops. |
| Automotive Sensor Fusion Unit | Industrial Radar Transceiver |
Use Scenario: Consolidates power for inertial measurement unit (IMU), GNSS receiver, and AI accelerator in centralized domain controller. IC Role / Device Role / Timing Role: Multi-rail PMIC with synchronized enable sequencing - coordinates voltage ramps across heterogeneous silicon dies. Use Value: Configurable GPOs and interrupt masking allow custom fault-handling logic for sensor-specific failure modes (e.g., IMU bias drift). |
Use Scenario: Powers 24-GHz industrial radar transceiver in factory automation or level-sensing equipment. IC Role / Device Role / Timing Role: Robust 5-V boost stage drives high-side FET gate drivers; buck converters supply FPGA logic and ADC reference. Use Value: −40°C to +125°C operation and 150°C thermal shutdown ensure reliability in uncooled enclosures near motors or welding stations. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar multi-rail automotive power management applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS65381A-Q1 | Single 3-A buck + dual LDOs; no boost; integrated CAN transceiver; lower integration of monitoring functions | Better suited for MCU-centric ECUs without radar/camera high-current demands | Select when CAN physical layer integration and lower BOM count outweigh need for 5-V boost or dual 3.5-A bucks |
| LM61480-Q1 | Single 8-A buck only; no boost, no monitoring, no I²C; higher current but minimal diagnostics | Targeted at high-power core rails where safety monitoring is handled externally | Choose when system-level functional safety is implemented via separate ASIL-certified monitor ICs |
Compared with TPS65381A-Q1 and LM61480-Q1, the LP87702DRHBRQ1 uniquely combines dual high-current bucks, integrated 5-V boost, and automotive-grade diagnostics in one package - reducing board area and enabling single-chip ASIL-B power subsystems for radar and vision systems.
Availability
LP87702DRHBRQ1 is available at Aetrix Electronics and suitable for automotive radar, ADAS camera modules, and industrial radar systems requiring stable component supply, long-term lifecycle assurance, and AEC-Q100-compliant traceability.
Supply support for LP87702DRHBRQ1 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 LP87702DRHBRQ1 belongs to TI's LP87xx-Q1 automotive PMIC family, engineered specifically for radar, camera, and sensor fusion applications demanding high integration, diagnostic rigor, and ASIL-B compliance.
FAQ
What is the maximum supported I²C clock frequency for the LP87702DRHBRQ1?
The LP87702DRHBRQ1 supports I²C communication up to 3.4 MHz in High-Speed mode, enabling rapid register reads/writes for dynamic voltage scaling and real-time fault reporting. This capability is essential for time-critical diagnostics in automotive radar systems where latency must remain below 100 µs. The LP87702DRHBRQ1 maintains full functionality across Standard (100 kHz), Fast (400 kHz), Fast+ (1 MHz), and High-Speed (3.4 MHz) modes without requiring external level shifters.
Does the LP87702DRHBRQ1 support remote voltage sensing for its buck outputs?
Yes, the LP87702DRHBRQ1 supports remote voltage sensing via dedicated FB_B0 and FB_B1 pins, allowing compensation for PCB trace resistance between the converter output and point-of-load. This feature improves DC output voltage accuracy to within ±2% over temperature and load, critical for powering noise-sensitive radar RF sections. Remote sensing is enabled by routing feedback traces directly from the load side of the output capacitor back to the FB pins - a capability confirmed in the LP87702DRHBRQ1 datasheet Section 9.2.
How does the LP87702DRHBRQ1 implement functional safety monitoring?
The LP87702DRHBRQ1 implements functional safety through dual voltage monitoring inputs (VMON1/VMON2), a window watchdog with WDI input and WD_RESET output, programmable power-good signals (PG0/PG1), overtemperature warning and shutdown, and overvoltage/undervoltage protection on all rails. These features collectively support ISO 26262 ASIL-B diagnostic coverage without external components. The LP87702DRHBRQ1's dedicated VANA reference rail and OTP-configured fault thresholds further enhance reliability in safety-critical automotive applications.
Can the LP87702DRHBRQ1 operate in boost-only mode while disabling the buck converters?
Yes, the LP87702DRHBRQ1 supports independent enable/disable control of each regulator via its I²C interface or hardware EN1 signal. The boost converter can be operated standalone - for example, to power a 5-V MIPI CSI-2 interface while keeping buck stages off - with full protection (OVP, short-circuit, thermal) remaining active. This flexibility is documented in the LP87702DRHBRQ1's device functional modes section (Section 8.4), where individual converter enable bits are defined in register 0x10.
What is the purpose of the VANA pin on the LP87702DRHBRQ1?
The VANA pin supplies regulated power to the LP87702DRHBRQ1's internal analog circuitry, including voltage references, ADCs, comparators, and monitoring blocks. It must be connected to the same node as VIN_B0/VIN_B1 and bypassed locally with ≥10 µF capacitance. Maintaining clean, low-noise VANA is essential for accurate voltage monitoring (±1% window accuracy) and stable power-good assertion - a requirement explicitly specified in the LP87702DRHBRQ1's recommended operating conditions (Section 7.3).
P87702DRHBRQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Function:
- -
- Output Configuration:
- -
- Topology:
- -
- Output Type:
- -
- Number of Outputs:
- -
- Voltage - Input (Min):
- -
- Voltage - Input (Max):
- -
- Voltage - Output (Min/Fixed):
- -
- Voltage - Output (Max):
- -
- Current - Output:
- -
- Frequency - Switching:
- -
- Synchronous Rectifier:
- -
- Operating Temperature:
- -
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- -
- Supplier Device Package:
- -
P87702DRHBRQ1 FAQ
1.How can I place an order for P87702DRHBRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for P87702DRHBRQ1 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 P87702DRHBRQ1 reliable?
The price and inventory of P87702DRHBRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P87702DRHBRQ1 is usually 5 days.
3.What payment methods are accepted for P87702DRHBRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P87702DRHBRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P87702DRHBRQ1?
P87702DRHBRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P87702DRHBRQ1 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 P87702DRHBRQ1?
For technical support, including P87702DRHBRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P87702DRHBRQ1 requirements.
6.How does Aetrix verify that P87702DRHBRQ1 is sourced from the original manufacturer or authorized distributors?
All P87702DRHBRQ1 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 P87702DRHBRQ1 meets industry standards.
7.What is the process for return or replacement of P87702DRHBRQ1?
All P87702DRHBRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with P87702DRHBRQ1, 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 P87702DRHBRQ1 part is unused and in its original packaging.
Return procedure for P87702DRHBRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P87702DRHBRQ1 Tags
-
TPS562201DDCR
Texas Instruments
-
MC34063ABD-TR
STMicroelectronics
-
TPS561201DDCR
Texas Instruments
-
MC33063ADR
Texas Instruments
-
MC34063ADR
Texas Instruments
-
TPS560200DBVR
Texas Instruments
-
AP3012KTR-G1
Diodes Incorporated
-
TLV61048DBVR
Texas Instruments
-
AZ34063UMTR-G1
Diodes Incorporated
-
TPS562200DDCR
Texas Instruments
-
AP62300TWU-7
Diodes Incorporated
-
MC34063EBD-TR
STMicroelectronics
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
