Texas Instruments TPS735285DRVT

Overview

TPS735285DRVT from Texas Instruments is a 500-mA, low-noise, high-PSRR, low-dropout linear regulator with fixed 2.85-V output, operating from 2.7 V to 6.5 V input. It delivers 2% output accuracy over load, line, and temperature (–40°C to +125°C), features 45 μA quiescent current, 280 mV dropout at 500 mA, and is stable with a 2.2-μF ceramic output capacitor. It serves as a post-DC/DC ripple filter in IP network cameras and macro base stations.

For engineers reviewing the TPS735285DRVT datasheet, TPS735285DRVT pinout, TPS735285DRVT application, or TPS735285DRVT equivalent, key selection criteria include its 13.2 μV_RMS output noise, 68 dB PSRR at 1 kHz, fast 45-μs startup, WSON-6 package thermal performance (R_θJB = 34.7°C/W), and NR pin support for feed-forward noise reduction.

Technical Context

The TPS735285DRVT uses a PMOS pass transistor architecture enabling low dropout (280 mV at 500 mA) and high PSRR via a high-gain, high-bandwidth error amplifier. Its fixed-output variant integrates a dedicated NR pin for external feed-forward capacitor (C_FF = 10 nF typical) to suppress bandgap reference noise, reducing output noise to 13.2 μV_RMS.

It incorporates active protection including thermal shutdown (trip at 165°C, reset at 145°C), undervoltage lockout (UVLO with 70-mV hysteresis), and internal current limiting (800–1900 mA). The enable pin (EN) supports TTL/CMOS-compatible active-high control with sub-1-μA shutdown current.

Key Specifications

Pinout & Package

TPS735285DRVT is housed in a thermally enhanced 2-mm × 2-mm WSON-6 package with exposed thermal pad (DRV suffix), optimized for PCB heat dissipation via 2×2 thermal vias to ground plane.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar low-noise LDO regulator applications.

Compared with TPL730F285DRVT and TPS7A20285PDQNR, the TPS735285DRVT offers the optimal balance of low noise (13.2 μV_RMS), high PSRR (68 dB), and industry-standard WSON-6 footprint-making it the preferred choice for cost-sensitive, thermally constrained telecom and imaging designs requiring proven field reliability.

Availability

TPS735285DRVT is available at Aetrix Electronics and suitable for IP network cameras, macro base stations, and thermostats requiring stable component supply, long-lifecycle support, and consistent parametric performance across production batches.

Supply support for TPS735285DRVT 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 power management technologies, with decades of LDO design heritage and automotive/industrial qualification expertise.

The TPS735 series was engineered for RF and precision analog applications demanding low noise, high PSRR, and ultra-low quiescent current in compact packages-targeting wireless infrastructure, imaging, and industrial sensing markets.

FAQ

What is the maximum input voltage rating for the TPS735285DRVT?

The TPS735285DRVT has an absolute maximum input voltage of 7 V, but its recommended operating range is 2.7 V to 6.5 V. Exceeding 6.5 V may degrade long-term reliability or trigger internal protection circuits. For sustained operation, maintain VIN ≤ 6.5 V with adequate derating margin per thermal conditions.

Does the TPS735285DRVT require an external feed-forward capacitor on the NR pin?

Yes-the TPS735285DRVT's NR pin (Pin 2) is designed for a 10-nF feed-forward capacitor to achieve its specified 13.2 μV_RMS output noise and 68 dB PSRR at 1 kHz. Omitting this capacitor increases noise to ~95 × V_OUT and reduces PSRR by up to 10 dB at low frequencies.

Can the TPS735285DRVT be used without connecting the EN pin?

Yes-the EN pin (Pin 4) can be tied directly to the IN pin to permanently enable the TPS735285DRVT. This configuration eliminates external control logic while maintaining full regulation functionality, provided the input voltage remains within 2.7–6.5 V during all operational states.

What is the thermal performance of the TPS735285DRVT in its WSON-6 package?

The TPS735285DRVT in DRV (WSON-6) package has a junction-to-board thermal resistance (R_θJB) of 34.7°C/W and junction-to-ambient (R_θJA) of 65.1°C/W under JEDEC-standard high-K board conditions. Effective thermal via placement beneath the exposed pad is essential to realize these values in production layouts.

How does the TPS735285DRVT handle reverse voltage conditions?

The TPS735285DRVT contains a body diode in its PMOS pass transistor that conducts when V_OUT exceeds V_IN. This path is not current-limited, so sustained reverse voltage can cause overheating or damage. External reverse-voltage protection (e.g., series Schottky diode) is required in systems where V_OUT may exceed V_IN.