Texas Instruments TPS71933-33DRVT

Overview

TPS71933-33DRVT from Texas Instruments is a dual-output, 200mA low-noise LDO regulator with independent enables, delivering fixed 3.3V on OUT1 and 3.3V on OUT2. It features 70µVRMS output noise, 65dB PSRR at 1kHz, 230mV dropout at 200mA, and operates from 2.7V to 6.5V input. Designed for space-constrained portable systems requiring clean, sequenced dual-rail power.

For engineers reviewing the TPS71933-33DRVT datasheet, TPS71933-33DRVT pinout, TPS71933-33DRVT application, or TPS71933-33DRVT equivalent, key selection criteria include dual independent enable control, active pulldown on both outputs, ceramic capacitor stability (≥1µF), thermal shutdown at +160°C, and operation across –40°C to +125°C junction temperature.

Technical Context

The TPS71933-33DRVT integrates two PMOS-based LDOs sharing a common input but with fully independent enable pins (EN1/EN2), output discharge circuitry, and feedback loops. Each regulator uses sub-bandgap reference and advanced BiCMOS process to achieve ±3% output accuracy over line, load, temperature, and process variations.

It employs an ultra-low-quiescent-current architecture (90µA typical with both LDOs enabled) and includes undervoltage lockout (UVLO) with 2.45V threshold and 150mV hysteresis, plus overcurrent and thermal protection. The device is stable with 1µF X5R/X7R ceramic output capacitors and requires no minimum load.

Key Specifications

Pinout & Package

TPS71933-33DRVT is housed in a 2mm × 2mm WSON-6 (DRV) package with exposed thermal pad connected to GND. Pinout is verified per TI SBVS088C Rev. May 2008, Figure 24 (DRV top view).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-output LDO applications.

Compared with TPS71933-33DRVT, TPS71933-28DRVT offers different output pairing but identical sequencing capability, while TPS71833-33DRVT trades pulldown and efficiency for reduced complexity-neither is pin-compatible drop-in replacement due to functional differences in discharge behavior and quiescent performance.

Availability

TPS71933-33DRVT is available at Aetrix Electronics and suitable for wireless communication modules, portable imaging systems, and industrial handheld devices requiring stable component supply, guaranteed long-term availability, and full traceability.

Supply support for TPS71933-33DRVT 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 connectivity technologies, with decades of LDO design expertise and broad automotive, industrial, and consumer qualification.

The TPS719xx family was engineered specifically for portable, battery-powered applications demanding ultra-low noise, dual independent regulation, and fast, controlled power sequencing-addressing critical needs in WLAN, Bluetooth®, and multi-sensor edge devices.

FAQ

What are the exact output voltages of the TPS71933-33DRVT?

The TPS71933-33DRVT delivers precisely 3.3V on both OUT1 and OUT2. This dual-fixed 3.3V configuration is factory-programmed via EEPROM and specified with ±3% accuracy over –40°C to +125°C junction temperature, line, and load conditions. No external resistors or configuration pins are required.

Does the TPS71933-33DRVT support independent power sequencing?

Yes, the TPS71933-33DRVT provides full independent control via EN1 and EN2 pins. Each enable is active-high and electrically isolated, allowing staggered startup (e.g., enable OUT1 first for core logic, then OUT2 for peripherals) or selective shutdown-essential for managing inrush current and meeting system-level power-state transitions.

What is the purpose of the active pulldown feature in the TPS71933-33DRVT?

The TPS71933-33DRVT includes active NMOS pulldown on both OUT1 and OUT2, which rapidly discharges connected capacitance when the respective enable pin is driven low. This prevents floating outputs, eliminates residual voltage that could cause latch-up in downstream logic, and ensures predictable reset behavior-critical in battery-powered systems with tight power-state timing budgets.

Can the TPS71933-33DRVT operate from a single-cell Li-ion battery?

Yes, the TPS71933-33DRVT supports input voltages from 2.7V to 6.5V and maintains regulation down to 230mV dropout. With a nominal 3.3V output, it remains functional until battery voltage drops to ~3.53V - well within the usable range of a single-cell Li-ion (3.0V–4.2V), enabling efficient use of battery capacity without premature brownout.

Is the TPS71933-33DRVT stable with ceramic output capacitors?

Yes, the TPS71933-33DRVT is explicitly designed and characterized for stability with ≥1.0µF X5R or X7R ceramic capacitors on both outputs. These capacitors provide superior ESR performance versus tantalum or aluminum electrolytics, reducing board area, improving transient response, and eliminating aging-related drift-no additional compensation components are needed.