Texas Instruments TPS65035001RZDRQ1

Overview

TPS65035001RZDRQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive power management IC designed for camera modules, integrating three step-down converters (BUCK1: 4.0–18.3 V_IN, 2.5–4.0 V_OUT, 1.5 A; BUCK2/BUCK3: 2.5–5.5 V_IN, 0.9–1.9 V_OUT, 1.2 A each) and one adjustable LDO (1.8–3.3 V, 300 mA, I²C-controlled) in a 3.0 × 3.5 mm WQFN-22 package with wettable flanks.

For engineers reviewing the TPS65035001RZDRQ1 datasheet, TPS65035001RZDRQ1 pinout, TPS65035001RZDRQ1 application, or TPS65035001RZDRQ1 equivalent, this device supports PoC-compatible camera power sequencing, fixed 2.3-MHz PWM operation with spread-spectrum EMI reduction, and independent input rails for flexible system-level voltage domain isolation.

Technical Context

The TPS65035001RZDRQ1 implements forced fixed-frequency PWM across all three buck converters-no PFM mode-ensuring deterministic timing and predictable EMI profiles critical for automotive vision systems. BUCK1 supports direct connection to Power over Coax (PoC) lines up to 18.3 V, while BUCK2 and BUCK3 operate from lower intermediate rails (2.5–5.5 V), enabling cascaded power architecture.

The integrated LDO features high PSRR and low noise, optimized for powering image sensor analog blocks or serializer PLLs; its output is digitally adjustable via I²C interface, allowing runtime configuration without hardware changes. All regulators support independent enable/control and thermal shutdown with -40°C to +125°C ambient operation.

Key Specifications

Pinout & Package

TPS65035001RZDRQ1 is housed in a 3.0 mm × 3.5 mm, 22-pin WQFN-FCRLF (RZD) package with wettable flanks and an exposed thermal pad requiring PCB soldering per TI SLUA271 guidelines. Pin 1 is located at top-left corner (Q1 quadrant), and the package supports standard SMT reflow per MSL Level-3 (260°C peak).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar automotive camera PMIC applications.

Compared with TPS65035001RZDRQ1, the 00 variant offers identical performance with factory-set LDO voltage, reducing startup complexity; MAX20049 provides pin-compatible functionality at lower feature density but requires external sequencing logic and passive EMI mitigation.

Availability

TPS65035001RZDRQ1 is available at Aetrix Electronics and suitable for rear view camera modules, surround view systems, driver monitoring units, front ADAS cameras, and e-mirror implementations requiring stable component supply across automotive production lifecycles.

Supply support for TPS65035001RZDRQ1 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, embedded processing, and automotive ICs, with decades of leadership in power management innovation and automotive qualification.

The TPS650350-Q1 product line was engineered specifically for automotive camera power architectures-integrating PoC-ready high-voltage bucks, low-noise LDOs, and I²C configurability to replace multi-chip discrete solutions in space-constrained modules.

FAQ

What is the maximum input voltage supported by the BUCK1 regulator in the TPS65035001RZDRQ1?

The BUCK1 regulator in the TPS65035001RZDRQ1 supports a maximum input voltage of 18.3 V. This specification enables direct integration with Power over Coax (PoC) infrastructure commonly used in automotive camera links. The 18.3 V rating is validated across the full -40°C to +125°C ambient temperature range and is not derated for thermal or lifetime conditions in production-grade operation of the TPS65035001RZDRQ1.

Does the TPS65035001RZDRQ1 support I²C-based dynamic voltage adjustment for all its outputs?

The TPS65035001RZDRQ1 supports I²C-based dynamic voltage adjustment only for the integrated LDO output (VOUT_LDO), which is programmable from 1.8 V to 3.3 V in 50-mV steps. The three buck converters (BUCK1–BUCK3) have fixed output voltages set by external resistor dividers; their regulation points cannot be modified via I²C. This architecture balances flexibility for noise-sensitive analog domains with deterministic performance for digital power rails in the TPS65035001RZDRQ1.

What is the purpose of the spread-spectrum clock (SSC) feature in the TPS65035001RZDRQ1?

The spread-spectrum clock (SSC) feature in the TPS65035001RZDRQ1 modulates the 2.3-MHz switching frequency by ±1% to reduce peak radiated emissions. This helps automotive camera systems meet stringent CISPR-25 Class 5 EMI limits without requiring large external filters. SSC operates automatically on all three buck converters and does not affect regulation accuracy, load transient response, or thermal performance of the TPS65035001RZDRQ1.

How is thermal management implemented in the TPS65035001RZDRQ1?

The TPS65035001RZDRQ1 implements thermal management through an internal junction temperature sensor that asserts the open-drain THRM pin when die temperature reaches approximately 150°C. This signal can trigger system-level fault handling such as camera shutdown or power throttling. Additionally, the device requires soldering of its exposed thermal pad (EPAD) to PCB copper for effective heat conduction-TI recommends minimum 100 mm² thermal land area with ≥4 vias to inner ground planes for optimal performance in the TPS65035001RZDRQ1.

Is the TPS65035001RZDRQ1 pin-compatible with other variants in the TPS650350-Q1 family?

Yes, the TPS65035001RZDRQ1 is fully pin-compatible with all other RZDRQ1 variants (e.g., TPS65035000RZDRQ1, TPS65035002RZDRQ1) in the same WQFN-22 (RZD) package. Differences between variants are limited to factory-programmed LDO default voltage and internal register settings-no PCB layout changes are required when substituting within the family. All electrical characteristics, pin functions, thermal pad geometry, and mechanical dimensions remain identical across the TPS65035001RZDRQ1 and related orderables.