Texas Instruments TPS79325DBVRG4

Overview

TPS79325DBVRG4 from Texas Instruments is a fixed-output 2.5 V, 200-mA low-dropout linear regulator in SOT-23-5 package, featuring 112 mV dropout at 200 mA, 70 dB PSRR at 10 kHz, and 33 µV_RMS output noise (with 0.01 µF NR capacitor), designed for RF power supply filtering in portable wireless receivers and ADC biasing.

For engineers reviewing the TPS79325DBVRG4 datasheet, TPS79325DBVRG4 pinout, TPS79325DBVRG4 application, or TPS79325DBVRG4 equivalent, this page delivers verified specifications, validated pin functions, confirmed RF-grade noise/PSRR performance, and real-world implementation guidance for battery-powered analog signal chains.

Technical Context

The TPS79325DBVRG4 employs a PMOS pass transistor architecture enabling ultra-low dropout and reverse-current protection via an integrated body diode. Its proprietary BiCMOS process achieves stable regulation with only a 2.2 µF ceramic output capacitor while maintaining fast 50 µs startup time using a 0.001 µF NR bypass capacitor.

It integrates undervoltage lockout (UVLO) with 2.25–2.65 V threshold and hysteresis, active-high enable logic (VEN(high) ≥ 1.7 V), and thermal shutdown activation at ~165°C. Ground current remains at 170 µA typical under load and drops below 1 µA in shutdown mode.

Key Specifications

Pinout & Package

SOT-23-5 (DBV) package: 2.90 mm × 1.60 mm footprint, 1.3 mm height, surface-mount, RoHS-compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS79325DBVRG4, TPS79325DBVT offers identical performance in smaller packaging format, while TPS7A2025PDQNR trades RF-grade noise/PSRR for nanoamp quiescent current - making the original optimal for mixed-signal RF systems demanding both low noise and moderate load capability.

Availability

TPS79325DBVRG4 is available at Aetrix Electronics and suitable for RF receiver power supplies, portable audio DAC biasing, cellular baseband core supplies, medical sensor signal chains, and industrial handheld instrumentation requiring stable component supply and full production traceability.

Supply support for TPS79325DBVRG4 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 and embedded processing solutions, with over 90 years of innovation in power management ICs and precision analog design.

The TPS793 family was engineered specifically for noise-sensitive, battery-powered RF and audio applications - prioritizing ultralow output noise, high PSRR, fast transient response, and minimal external component count in sub-3-mm footprints.

FAQ

What is the minimum input voltage required for TPS79325DBVRG4 to regulate at 2.5 V?

The TPS79325DBVRG4 requires VIN ≥ 3.5 V to maintain regulation at 200 mA load, based on its 112 mV dropout specification. At lighter loads, VIN may drop as low as 2.7 V (per recommended operating conditions), but output accuracy degrades near dropout. For reliable 2.5 V output across full load range, maintain VIN ≥ 3.5 V. The device also incorporates UVLO that disables output if VIN falls below 2.25 V.

Does TPS79325DBVRG4 require an external noise reduction capacitor?

TPS79325DBVRG4 does not require but strongly benefits from an external capacitor on the NR pin: 0.01 µF yields 33 µV_RMS output noise, while omitting it increases noise to 55 µV_RMS. The NR capacitor filters internal bandgap noise and improves PSRR by up to 20 dB. TI recommends 0.001–0.1 µF ceramic (X7R/X5R) placed close to the NR pin with short traces.

Can TPS79325DBVRG4 be used with a 1-µF output capacitor?

No - TPS79325DBVRG4 is only guaranteed stable with ≥2.2 µF ceramic output capacitance (X7R/X5R dielectric). Using 1 µF violates the minimum COUT requirement and risks oscillation or poor transient response. For space-constrained designs, select the 2.2 µF 0402 or 0603 case size; TI validates stability with 2.2 µF ±20% tolerance parts.

What is the thermal shutdown behavior of TPS79325DBVRG4?

TPS79325DBVRG4 activates thermal shutdown at ~165°C junction temperature, disabling the output until junction cools to ~140°C. This cycling protects against permanent damage but indicates excessive power dissipation. For continuous operation, keep TJ ≤ 125°C using PCB copper pour and verify with θ_JA = 225.1°C/W (SOT-23-5). Derate output current above 85°C ambient.

Is TPS79325DBVRG4 pin-compatible with other TPS793 variants?

Yes - all TPS793 fixed-output versions in SOT-23-5 (DBV) package share identical pinout: IN (1), GND (2), EN (3), NR (4), OUT (5). TPS79325DBVRG4 can replace TPS79318, TPS79328, TPS79330, etc., on the same footprint, provided input voltage and load requirements align with the specific variant's ratings.