Texas Instruments TPS79915YZUT

Overview

TPS79915YZUT from Texas Instruments is a 200-mA, low-quiescent-current (40 μA), ultralow-noise (10.5 × V_OUT μV_RMS), high-PSRR (66 dB at 1 kHz) low-dropout linear regulator in a 5-bump DSBGA package (0.97 mm × 1.34 mm). It delivers a fixed 1.5-V output with ±2% accuracy over –40°C to +125°C and 100-mV dropout at full load, targeting RF power rails in wearable transceivers and precision analog subsystems.

For engineers reviewing the TPS79915YZUT datasheet, TPS79915YZUT pinout, TPS79915YZUT application, or TPS79915YZUT equivalent, this page provides verified package mapping, validated pin functions for the YZU DSBGA variant, confirmed noise-reduction architecture, and real-world transient response data - all critical for noise-sensitive LDO selection in space-constrained RF designs.

Technical Context

The TPS79915YZUT employs a PMOS pass element with advanced BiCMOS process technology to achieve 100-mV dropout at 200 mA while maintaining 40-μA quiescent current. Its high-gain, high-bandwidth error amplifier enables 66-dB PSRR at 1 kHz and fast line/load transient response via an active pulldown circuit that engages on >5% output overshoot.

It integrates inrush current protection triggered by EN toggle, undervoltage lockout (UVLO) with 70-mV hysteresis (2.20-V threshold), and thermal shutdown at 165°C. The NR pin supports external 0.01-μF bypass capacitor to suppress bandgap noise, reducing total output noise to 15.8 μV_RMS at 1.5 V.

Key Specifications

Pinout & Package

The TPS79915YZUT is housed in a 5-bump, die-sized ball grid array (DSBGA) package measuring 0.97 mm × 1.34 mm with 0.4-mm pitch, optimized for ultra-compact RF modules and wearables.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS79915DDCR and ADP160AUJZ-1.5-R7, the TPS79915YZUT uniquely combines DSBGA miniaturization, integrated inrush limiting, and balanced noise/PSRR performance - making it the optimal choice for production-volume, space-constrained RF modules requiring robust power sequencing.

Availability

TPS79915YZUT is available at Aetrix Electronics and suitable for RF transceiver biasing, VCO/PLL core supplies, wearable sensor hubs, low-power MCU core rails, and precision analog subsystems requiring stable component supply with guaranteed long-term availability.

Supply support for TPS79915YZUT 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 and embedded processing technologies, with decades of LDO innovation focused on power integrity and signal-chain performance.

The TPS799 product line was engineered specifically for noise-sensitive RF and precision analog applications - delivering ultralow noise, high PSRR, and miniature packaging without compromising thermal robustness or accuracy.

FAQ

What is the maximum input voltage rating for the TPS79915YZUT?

The TPS79915YZUT has an absolute maximum input voltage of 7.0 V. However, its recommended operating input range is 2.7 V to 6.5 V. Operation above 6.5 V risks exceeding safe junction temperature limits and violates the device's specified operating conditions per the TI datasheet SBVS056L.

Does the TPS79915YZUT require an external noise-reduction capacitor to achieve its specified 15.8 μV_RMS output noise?

Yes - the TPS79915YZUT achieves its ultralow 15.8 μV_RMS noise (10 Hz–100 kHz) only when a 0.01-μF ceramic capacitor is connected to the NR pin. Without this capacitor, output noise rises to ~141 μV_RMS (94 × 1.5 V), as documented in the Electrical Characteristics table of the TPS79915YZUT datasheet.

Can the TPS79915YZUT be used with output capacitance below 2.2 μF?

No - the TPS79915YZUT is only guaranteed stable with ≥2.2 μF ceramic output capacitance (X5R/X7R, ESR < 1 Ω). Using smaller values risks oscillation and degraded transient response, as confirmed in Section 6.5 and Figure 6-20 of the official TI datasheet SBVS056L.

What is the thermal resistance (R_θJA) of the TPS79915YZUT in its YZU DSBGA package?

The TPS79915YZUT in the YZU DSBGA package has a junction-to-ambient thermal resistance (R_θJA) of 143.3°C/W, measured under standard JEDEC JESD51-7 conditions. This value assumes a 2-layer PCB with 1-in² copper pour and is critical for calculating maximum allowable power dissipation at elevated ambient temperatures.

How does the enable pin (EN) behavior differ between active and shutdown states for the TPS79915YZUT?

When EN ≥ 1.2 V, the TPS79915YZUT operates normally with 40-μA quiescent current. When EN ≤ 0.4 V, it enters shutdown mode with 150-nA typical ground current. The transition thresholds include 70-mV hysteresis to prevent chatter near the switching point, as specified in the Electrical Characteristics table of the TPS79915YZUT datasheet.