Texas Instruments TPS715A33DRBRM3

Overview

TPS715A33DRBRM3 from Texas Instruments is a fixed-output 3.3-V, 80-mA low-dropout linear regulator with 3.2-μA quiescent current, 2.5–24-V input range, and 650-mV typical dropout at full load-designed for battery-powered microcontroller systems including MSP430-based sensing nodes and portable medical devices.

For engineers reviewing the TPS715A33DRBRM3 datasheet, TPS715A33DRBRM3 pinout, TPS715A33DRBRM3 application, or TPS715A33DRBRM3 equivalent, key selection criteria include ultra-low IQ stability across 0–80 mA, guaranteed 3.3-V ±1.6% output accuracy over –40°C to +125°C, and compatibility with ≥0.47-μF ceramic output capacitors in space-constrained WSON-6 layouts.

Technical Context

The TPS715A33DRBRM3 implements a CMOS pass transistor architecture with internal soft-start and brick-wall overcurrent protection. Its reference voltage is fixed at 1.205 V, and regulation is achieved via error amplifier feedback to the gate of the pass device-enabling stable operation without external compensation.

This variant is the "new chip" version of the TPS715A family, featuring improved ground current consistency (3.2–4.8 μA over temperature/load), lower output noise (425 μV_RMS), tighter line regulation (20–22 mV), and enhanced thermal performance in the DRB/DRV package options-specifically validated for 3.3-V fixed-output use with no external resistors required.

Key Specifications

Pinout & Package

TPS715A33DRBRM3 is packaged in a 2-mm × 2-mm, 6-pin WSON (DRV) with exposed thermal pad. The package supports hand-held and ultra-portable applications and features optimized thermal performance via bottom-side copper connection.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS70933DRVR and MCP1700T-3302E/MB, the TPS715A33DRBRM3 uniquely balances 24-V input tolerance, 3.2-μA IQ, 650-mV dropout, and 0.47-μF stability-making it the only option qualified for long-life, wide-input, high-temperature embedded systems without compromising capacitor size or efficiency.

Availability

TPS715A33DRBRM3 is available at Aetrix Electronics and suitable for home automation sensors, portable medical monitors, and industrial I/O modules requiring stable component supply with long lifecycle assurance and traceable sourcing.

Supply support for TPS715A33DRBRM3 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 expertise and broad automotive/industrial qualification.

The TPS715A product line was engineered specifically for ultra-low-power, wide-input-voltage battery and industrial applications-emphasizing quiescent current optimization, thermal resilience, and minimal external component count in miniaturized packages.

FAQ

What is the maximum input voltage rating for TPS715A33DRBRM3?

The TPS715A33DRBRM3 has an absolute maximum input voltage of 30 V for the new-chip revision, with recommended operation up to 24 V. This allows direct connection to 24-V industrial rails or multi-cell battery stacks without external clamping-critical for ruggedized edge devices where input transients exceed nominal supply levels.

Does TPS715A33DRBRM3 require an external feedback resistor network?

No, the TPS715A33DRBRM3 is a fixed-output 3.3-V variant and contains internal feedback-no external resistors are needed. This simplifies layout, reduces BOM cost, and eliminates resistor tolerance errors that affect output accuracy in adjustable LDOs like the TPS715A01.

What output capacitor value is required for stable operation of TPS715A33DRBRM3?

The TPS715A33DRBRM3 requires a minimum effective output capacitance of 0.47 μF (50% derated from nominal), meaning a 1-μF X7R ceramic capacitor is recommended. This enables stable regulation with fast transient response and fits within tight 2-mm × 2-mm WSON footprint constraints.

How does the overcurrent protection behave in TPS715A33DRBRM3 during a short-circuit event?

The TPS715A33DRBRM3 employs a brick-wall current limit (160–500 mA depending on VIN) that clamps output current without shutting down. During sustained overload, the device remains active but enters thermal stress-requiring proper PCB copper area and ambient derating per its R_θJA = 69.5°C/W specification to avoid junction exceedance.

Is TPS715A33DRBRM3 compatible with lithium-ion battery discharge profiles?

Yes-the TPS715A33DRBRM3 maintains regulation down to 3.95 V input (3.3 V + 650 mV dropout) and draws only 3.2 μA quiescent current, enabling full utilization of Li-ion cells from 4.2 V down to ~3.0 V system cutoff. Its low IQ and wide VIN make it ideal for single-cell battery longevity in portable instrumentation.