Texas Instruments TPS799315YZUT

Overview

TPS799315YZUT 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 and precision analog circuitry in space-constrained portable systems.

For engineers reviewing the TPS799315YZUT datasheet, TPS799315YZUT pinout, TPS799315YZUT application, or TPS799315YZUT equivalent, this page delivers verified package mapping (5-pin DSBGA, 1.34 mm × 0.97 mm), confirmed pin functions (IN, OUT, GND, EN, NR), thermal performance (R_θJA = 143.3°C/W), and real-world design trade-offs between noise reduction capacitor use and start-up time.

Technical Context

The TPS799315YZUT 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 internal 1.193-V bandgap reference deliver 2% overall 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 activation, overshoot detection (±5% threshold), and a dedicated noise-reduction (NR) pin that bypasses bandgap noise when paired with a 0.01-μF capacitor - reducing total output noise to 33.1 μV_RMS at 3.15 V and enabling fast start-up (~50 μs) via an internal quick-start circuit.

Key Specifications

Pinout & Package

TPS799315YZUT is packaged in a 5-bump, thin, die-sized ball grid array (DSBGA) measuring 1.34 mm × 0.97 mm with 0.4-mm pitch. This ultra-compact package targets high-density RF modules and wearable PCBs where board area is constrained.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS799315YZUT, TPL720F33PDBVR offers higher current and lower quiescent current in identical DSBGA-5 packaging but lacks the NR pin for adaptive noise control; TPS7A20315PDQNR delivers superior PSRR and I_Q at the cost of larger size and loss of noise-reduction flexibility - making TPS799315YZUT optimal for RF-sensitive, space-constrained designs requiring tunable noise performance.

Availability

TPS799315YZUT is available at Aetrix Electronics and suitable for RF power amplifiers, VCO core supplies, wearable sensor hubs, and wireless LAN coexistence filter supplies requiring stable component supply, long-term lifecycle support, and traceable sourcing for high-reliability production.

Supply support for TPS799315YZUT 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 connectivity technologies with over 50 years of power management innovation.

The TPS799 family was engineered specifically for RF and precision analog subsystems demanding ultralow noise, high PSRR, and minimal quiescent current in miniature packages - targeting next-generation wireless infrastructure, mobile handsets, and wearables.

FAQ

What is the maximum input voltage rating for the TPS799315YZUT?

The TPS799315YZUT has an absolute maximum input voltage (VIN) rating of 7.0 V. Operation above this level risks permanent damage. For reliable continuous operation, the recommended maximum input is 6.5 V, with minimum input set by dropout: VIN ≥ 3.15 V + 100 mV = 3.25 V under full 200-mA load. The device includes undervoltage lockout (UVLO) that disables regulation below 1.9 V (rising edge) to prevent unstable behavior.

Does the TPS799315YZUT require an external noise-reduction capacitor to achieve its specified output noise?

Yes - the TPS799315YZUT achieves its ultralow 33.1 μV_RMS output 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 94 × V_OUT ≈ 296 μV_RMS. The NR pin is high-impedance, so low-leakage X7R/X5R ceramics are required; the quick-start circuit fully charges this capacitor in ~135 μs during enable assertion.

Can the TPS799315YZUT be used without connecting the EN pin?

Yes - the EN pin of the TPS799315YZUT can be tied directly to IN to enable permanent operation, eliminating external control logic. When left unconnected, the internal pull-down ensures the device remains disabled. If EN is unused, TI recommends connecting it to IN; floating EN is not advised due to potential noise susceptibility. In shutdown mode (EN < 0.4 V), ground current drops to 0.15 μA typical.

What output capacitor value and type does the TPS799315YZUT require for stability?

The TPS799315YZUT is stable with a minimum 2.2-μF ceramic output capacitor (X5R or X7R dielectric preferred), with ESR < 1.0 Ω. Larger values (e.g., 10 μF) improve transient response but increase start-up time. Aluminum polymer or tantalum capacitors are not required or recommended. Input capacitance (0.1–1 μF ceramic) is optional but strongly advised for PSRR and noise suppression, especially in noisy DC/DC-fed systems.

Is the TPS799315YZUT pin-compatible with other TPS799 variants in the YZU DSBGA package?

Yes - all TPS799 fixed-output variants in the YZU (5-bump DSBGA) package share identical pinout: Pin A1 = EN, A3 = NR (fixed) or FB (adjustable), B2 = GND, C1 = OUT, C3 = IN. The TPS799315YZUT is functionally and mechanically compatible with TPS79912YZUT through TPS79945YZUT in the same package, enabling voltage-scaling flexibility without PCB redesign.