Texas Instruments LP87332DRHDRQ1

Overview

LP87332DRHDRQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive power management IC integrating two 3-A synchronous buck converters and two 300-mA LDO regulators in a single 5-mm × 5-mm VQFN package. It operates from 2.8 V to 5.5 V input, delivers programmable output voltages (0.7–3.36 V for bucks; 0.8–3.3 V for LDOs), and supports I²C control, spread-spectrum EMI reduction, and remote voltage sensing - enabling precise point-of-load regulation in camera and radar ECUs.

For engineers reviewing the LP87332DRHDRQ1 datasheet, LP87332DRHDRQ1 pinout, LP87332DRHDRQ1 application, or LP87332DRHDRQ1 equivalent, this device is selected for high-efficiency dual-buck + dual-LDO power sequencing in safety-critical automotive vision systems where thermal robustness (−40°C to +125°C ambient), programmable slew rate (0.5–10 mV/µs), and integrated protection (OVP/UVLO/OTP) are mandatory.

Technical Context

The LP87332DRHDRQ1 implements independent PWM/PFM auto-mode control per buck channel, with phase interleaving and spread-spectrum modulation to suppress EMI peaks. Its dual-buck architecture supports synchronized or external-clock-locked 2-MHz switching, while remote sensing on FB pins compensates for IR drop between regulator output and load.

Each LDO features 53-dB PSRR at 10 kHz and 82-µV_RMS noise, with programmable PGOOD monitoring, overvoltage/undervoltage thresholds referenced to DC output level, and 200-mV dropout at full 300-mA load - ensuring stable low-noise bias for image sensors and SerDes interfaces.

Key Specifications

Pinout & Package

LP87332DRHDRQ1 uses a 28-pin, 5.00 mm × 5.00 mm VQFN package with wettable flanks and exposed thermal pad connected to PCB ground plane via multiple vias for optimal thermal performance (R_θJB = 8.9°C/W).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-buck + dual-LDO power management applications.

Compared with TPS653221A-Q1 and LP87322D-Q1, the LP87332DRHDRQ1 uniquely delivers dual 3-A bucks with remote sensing and spread-spectrum EMI control - making it the only option among the three capable of powering next-generation 8-MP camera SoCs while meeting stringent automotive EMC requirements.

Availability

LP87332DRHDRQ1 is available at Aetrix Electronics and suitable for automotive camera modules, surround-view ECUs, and radar system designs requiring stable component supply, AEC-Q100 compliance, and long-term production continuity.

Supply support for LP87332DRHDRQ1 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 solutions, with decades of experience in AEC-Q100-qualified IC design and manufacturing.

The LP87332DRHDRQ1 belongs to TI's automotive PMIC portfolio engineered specifically for ADAS vision and radar systems - emphasizing high efficiency, EMI resilience, functional safety readiness, and seamless integration with image sensors and radar SoCs.

FAQ

What is the maximum output current capability of each buck converter in the LP87332DRHDRQ1?

The LP87332DRHDRQ1 supports up to 3 A per buck converter (Buck0 and Buck1), with forward current limit programmable from 1.5 A to 4 A. This rating is valid under recommended operating conditions (T_A ≤ 125°C, proper thermal layout), and actual achievable current depends on input voltage, output voltage, ambient temperature, and PCB copper area. The LP87332DRHDRQ1 datasheet specifies 3 A as the maximum continuous output current per channel.

Does the LP87332DRHDRQ1 support remote voltage sensing, and how is it implemented?

Yes, the LP87332DRHDRQ1 supports remote voltage sensing via dedicated FB_B0 and FB_B1 pins. These pins connect directly to the point-of-load (e.g., SoC power pins) rather than the regulator output capacitor, allowing the device to compensate for IR drop across PCB traces. This ensures ±2% output voltage accuracy regardless of trace resistance - a key capability confirmed in the LP87332DRHDRQ1 functional description and electrical characteristics tables.

What protection features are integrated into the LP87332DRHDRQ1?

The LP87332DRHDRQ1 integrates overtemperature warning (115–147°C), thermal 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), and LDO short-circuit detection (190–450 mV). All protections are hardware-based and operate independently of I²C communication - ensuring fail-safe behavior even during firmware faults. These are explicitly listed in the LP87332DRHDRQ1 protection functions section.

Can the LP87332DRHDRQ1 synchronize its switching frequency to an external clock source?

Yes, the LP87332DRHDRQ1 supports external clock synchronization via the CLKIN pin, accepting frequencies from 1 MHz to 24 MHz. When enabled, the internal buck switching frequency locks to a derived value (e.g., CLKIN/4 or CLKIN/8) to minimize beat frequencies and system-level EMI. This capability is documented in the LP87332DRHDRQ1 external clock and PLL specifications and is distinct from its native 2-MHz internal oscillator.

What is the purpose of the GPO and GPO2 functions in the LP87332DRHDRQ1?

The LP87332DRHDRQ1 provides two configurable general-purpose outputs: GPO (dedicated pin) and GPO2 (multiplexed with CLKIN). Both can be programmed via I²C to drive external circuitry (e.g., reset lines, enable signals, or LED indicators) and synchronized to the EN signal for coordinated power sequencing. Their open-drain/push-pull configuration and programmable polarity are defined in the LP87332DRHDRQ1 pin functions and feature description sections.