Texas Instruments TPS79325DBVREP

Overview

TPS79325DBVREP from Texas Instruments is a 2.5 V, 200-mA ultra-low-noise, high-PSRR low-dropout linear regulator in a 5-pin SOT-23 (DBV) package. It delivers 2.5 V ±2% output with 112 mV dropout at full load, 32 µV_RMS output noise, and 70 dB PSRR at 10 kHz - optimized for RF power supply filtering in portable wireless systems.

For engineers reviewing the TPS79325DBVREP datasheet, TPS79325DBVREP pinout, TPS79325DBVREP application, or TPS79325DBVREP equivalent, key selection criteria include its fixed 2.5 V output, EN-controlled shutdown (<1 µA standby), stability with 2.2-µF ceramic output capacitor, and BYPASS pin for noise reduction in VCO/PLL supply rails.

Technical Context

The TPS79325DBVREP employs a proprietary BiCMOS process to achieve ultralow dropout voltage and minimal reference noise coupling. Its internal 250-kΩ resistor on the BYPASS pin forms an RC filter with external capacitance to suppress bandgap reference noise before it modulates the output.

It integrates thermal shutdown, current limiting (~400 mA), and UVLO (2.25–2.65 V) with hysteresis. The device operates across –40°C to 125°C and supports fast start-up (≤100 µs with 0.01 µF bypass capacitor) while maintaining 170 µA typical quiescent current.

Key Specifications

Pinout & Package

TPS79325DBVREP is housed in a RoHS-compliant, lead-free 5-pin SOT-23 (DBV) package, 2.9 mm × 1.6 mm × 1.45 mm, with gull-wing leads and moisture sensitivity level 1 (260°C peak reflow).

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS79325DBVR and LP5907MFX-2.5/NOPB, the TPS79325DBVREP uniquely combines space-grade reliability (–40°C to 125°C EP rating), 70 dB PSRR at 10 kHz, and a dedicated BYPASS pin - making it optimal for RF-critical, long-lifecycle embedded systems where both noise and ripple rejection are non-negotiable.

Availability

TPS79325DBVREP is available at Aetrix Electronics and suitable for RF power amplifier biasing, VCO/PLL core supply, portable medical sensor analog front-ends, and industrial IoT edge node MCU core rails requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for TPS79325DBVREP 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 delivering analog, embedded processing, and connectivity solutions with emphasis on reliability, precision, and energy efficiency.

The TPS793xx family was designed specifically for noise-sensitive, battery-powered RF and portable electronics - prioritizing ultralow noise, high PSRR, fast transient response, and minimal external component count in space-constrained SOT-23 packages.

FAQ

What is the minimum input voltage required for TPS79325DBVREP to regulate 2.5 V at 200 mA?

The minimum input voltage is calculated as VO(typ) + VDO(max) = 2.5 V + 0.112 V = 2.612 V. However, per datasheet Section 4, the absolute minimum input is also constrained to VO + 1 V = 3.5 V for the TPS79325DBVREP. Therefore, the actual minimum valid input is 3.5 V - ensuring safe operation across all load and temperature conditions. This value is explicitly confirmed in the Electrical Characteristics table under "Input voltage" test conditions.

Does TPS79325DBVREP require an external feedback resistor network?

No, TPS79325DBVREP is a fixed-output variant and does not require external feedback resistors. It integrates internal resistor divider circuitry to set the 2.5 V output. Only the adjustable TPS79301DBVREP variant uses FB and external R1/R2. The TPS79325DBVREP pinout omits FB (pin 5 is BYPASS), confirming its fixed-voltage architecture.

Can TPS79325DBVREP operate with a 1-µF output capacitor?

No - the datasheet specifies a minimum 2.2-µF ceramic output capacitor for guaranteed stability across –40°C to 125°C. Using 1 µF risks oscillation or degraded transient response, especially at high temperatures or full load. Figure 20 (Typical Regions of Stability) confirms instability occurs below 2.2 µF for Co across the full operating range.

What is the purpose of the BYPASS pin on TPS79325DBVREP?

TPS79325DBVREP's BYPASS pin connects internally to the voltage reference through a 250-kΩ resistor. An external capacitor (e.g., 0.1 µF) forms a low-pass filter that attenuates reference noise before it modulates the output stage - directly enabling the 32 µV_RMS noise spec. Larger bypass capacitance slows start-up due to the RC time constant but further reduces integrated noise.

Is TPS79325DBVREP compatible with standard SOT-23 PCB footprints?

Yes - TPS79325DBVREP uses the JEDEC-standard 5-pin SOT-23 (DBV) package with 0.95 mm pin pitch and 1.45 mm max height. Its footprint matches common SOT-23-5 land patterns (e.g., TI DBV0005A outline). Pin 1 location and gull-wing lead geometry are fully compliant, enabling drop-in placement on existing SOT-23-5 layouts.