Texas Instruments TPS799315YZUR

Overview

TPS799315YZUR from Texas Instruments is a 200-mA, fixed-output 3.15 V low-dropout linear regulator with enable (EN), ultralow noise (10.5 × V_OUT μV_RMS), high PSRR (66 dB at 1 kHz), and 40 μA quiescent current - designed for powering noise-sensitive RF circuitry such as VCOs and WLAN front-ends in space-constrained portable devices.

For engineers reviewing the TPS799315YZUR datasheet, TPS799315YZUR pinout, TPS799315YZUR application, or TPS799315YZUR equivalent, this page delivers verified package mapping (5-bump DSBGA, 0.97 mm × 1.34 mm), confirmed pin functions (IN, OUT, GND, EN, NR), thermal performance (R_θJA = 143.3°C/W), and two validated alternative parts with documented functional and application differences.

Technical Context

The TPS799315YZUR employs a PMOS pass transistor architecture enabling 100 mV dropout at 200 mA while maintaining stability with ≥2 μF ceramic output capacitance. Its high-gain error amplifier and precision 1.193 V internal reference deliver 2% total output accuracy across –40°C to +125°C, load (500 μA–200 mA), and line (2.7 V–6.5 V) variations.

It integrates inrush current protection triggered by EN toggle, overshoot detection with active pulldown (~350 Ω), undervoltage lockout (UVLO rising threshold 2.20 V), and thermal shutdown (165°C). The NR pin supports external 0.01 μF bypassing to suppress bandgap noise and enhance PSRR beyond 10 kHz.

Key Specifications

Pinout & Package

TPS799315YZUR is packaged in a 5-bump, thin, die-sized ball grid array (DSBGA) with nominal body size 0.97 mm × 1.34 mm and 0.4-mm pitch. This ultra-compact package enables placement directly beneath RF ICs to minimize trace inductance and noise coupling.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS799315YZUR, the TPS799315DDCR offers identical regulation performance in a more manufacturable SOT-23-THIN package but sacrifices ~56% thermal efficiency; the ADP160AUJZ-3.15-R7 trades 50 mA output capacity and missing NR/overshoot features for 18 μA I_Q, making it viable only in non-critical, low-current sensing nodes.

Availability

TPS799315YZUR is available at Aetrix Electronics and suitable for wireless LAN front-ends, VCO power supplies, and wearable health sensor hubs requiring stable component supply, full production traceability, and long-term lifecycle support.

Supply support for TPS799315YZUR 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 company specializing in analog and embedded processing technologies, with leadership in power management ICs for high-reliability and signal-integrity–critical applications.

The TPS799 family was engineered specifically for RF and precision analog subsystems demanding ultralow noise, high PSRR, and minimal quiescent current - targeting wireless infrastructure, portable medical devices, and industrial IoT edge nodes.

FAQ

What is the maximum input voltage rating for the TPS799315YZUR?

The TPS799315YZUR has an absolute maximum input voltage of 7.0 V. However, its recommended operating input range is 2.7 V to 6.5 V. Exceeding 6.5 V may trigger internal protection circuits or degrade long-term reliability, even if within absolute ratings. For robust 3.15 V output, maintain VIN ≥ 3.25 V to stay above the 100 mV dropout threshold at full load.

Does the TPS799315YZUR require an external noise reduction capacitor to achieve its specified 33.2 μV_RMS output noise?

Yes - the 33.2 μV_RMS noise figure (10 Hz–100 kHz) for the TPS799315YZUR is measured with a 0.01 μF capacitor on the NR pin. Without this capacitor, output noise rises to ~94 × V_OUT = 297 μV_RMS. The NR pin must be bypassed with a low-leakage ceramic capacitor; X7R types are preferred for stable capacitance across temperature.

Can the TPS799315YZUR be used without connecting the EN pin?

Yes - the EN pin of the TPS799315YZUR can be tied directly to the IN pin to enable permanent operation. When left unconnected, EN floats high due to internal pull-up, but TI recommends tying it to IN for deterministic behavior. No external pull-up resistor is needed, and doing so avoids potential noise coupling into the high-impedance EN node.

What is the minimum output capacitance required for stability with the TPS799315YZUR?

The TPS799315YZUR requires a minimum 2.2 μF ceramic output capacitor (X5R or X7R dielectric) with ESR < 1.0 Ω for guaranteed stability across all operating conditions. Using less capacitance risks oscillation, especially under light loads or elevated temperatures. Larger values (e.g., 10 μF) improve transient response but do not affect stability margin.

How does the TPS799315YZUR handle output voltage overshoot during enable transitions?

The TPS799315YZUR incorporates active overshoot detection: if V_OUT exceeds 3.15 V by >5% (i.e., >3.308 V) during startup or load transients, an internal ~350 Ω pulldown resistor engages to clamp the output. This feature limits overshoot duration and amplitude, protecting downstream RF components like power amplifiers and mixers from overvoltage stress.