Texas Instruments TPS79920YZUT

Overview

TPS79920YZUT 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-pin DSBGA package (1.34 mm × 0.97 mm). It delivers fixed 2.0-V output with ±2% accuracy over –40°C to +125°C and supports RF power amplifiers, VCOs, and precision analog rails in space-constrained wireless systems.

For engineers reviewing the TPS79920YZUT datasheet, TPS79920YZUT pinout, TPS79920YZUT application, or TPS79920YZUT equivalent, this page provides verified electrical specs, validated DSBGA pin functions, confirmed noise-reduction capacitor implementation guidance, and real-world RF/analog supply use cases - all grounded in TI's SBVS056L production data sheet.

Technical Context

The TPS79920YZUT employs a PMOS pass element with 100-mV typical dropout at 200 mA, enabling stable operation under tight input-output headroom (e.g., 2.7-V IN → 2.0-V OUT). Its high-gain error amplifier and precision 1.193-V internal reference achieve 2% total output accuracy across load (500 μA–200 mA), line (2.7–6.5 V), and temperature (–40°C to +125°C).

It integrates inrush current limiting triggered by EN toggle, overshoot detection with active pulldown (~350 Ω), and UVLO (2.2 V nominal) with 70-mV hysteresis. The NR pin accepts a 0.01-μF ceramic capacitor to bypass bandgap noise, reducing output noise to 10.5 × V_OUT μV_RMS (BW = 10 Hz–100 kHz) while maintaining fast 50-μs start-up.

Key Specifications

Pinout & Package

TPS79920YZUT uses a 5-pin, 0.97-mm × 1.34-mm DSBGA package (YZU) with solder-ball interconnects. The die-sized footprint minimizes PCB area and parasitic inductance - critical for RF supply filtering.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS79920DDCR, the TPS79920YZUT offers superior thermal performance and smaller size for RF integration, while LP5907MFX-2.0/NOPB trades PSRR for lower noise and cost - making TPS79920YZUT the optimal choice for space-constrained, high-PSRR RF supply applications.

Availability

TPS79920YZUT is available at Aetrix Electronics and suitable for RF power amplifier supplies, VCO bias rails, wearable sensor hubs, and low-power ADC reference circuits requiring stable component supply, long-term lifecycle support, and guaranteed authentic sourcing.

Supply support for TPS79920YZUT 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 and high-reliability signal chain solutions.

The TPS799 family is designed specifically for ultra-low-noise, high-PSRR power delivery in RF, wireless, and precision analog systems - targeting applications where supply integrity directly impacts signal fidelity and spectral purity.

FAQ

What is the minimum input voltage required for stable operation of the TPS79920YZUT?

The TPS79920YZUT requires a minimum input voltage of 2.7 V or (V_OUT + V_DO) = 2.0 V + 0.1 V = 2.1 V, whichever is greater - so 2.7 V is the absolute minimum. At 200 mA load, dropout is 100 mV, meaning it regulates cleanly down to 2.1 V input; however, below 2.7 V, undervoltage lockout may activate. The TPS79920YZUT is specified for 2.7–6.5 V input across its full operating temperature range.

Does the TPS79920YZUT require an external noise-reduction capacitor to achieve its specified 21-μVRMS output noise?

Yes - the TPS79920YZUT achieves its 21-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 ~94 × V_OUT = 188 μV_RMS. The NR pin is specific to fixed-output variants like the TPS79920YZUT and must use a low-leakage ceramic capacitor; X7R types are recommended for stable performance across temperature.

Can the TPS79920YZUT be used in automotive applications requiring AEC-Q200 qualification?

No - the TPS79920YZUT is not AEC-Q200 qualified. It is rated for operation from –40°C to +125°C junction temperature and is intended for industrial, portable, and wireless applications. For automotive-grade equivalents, TI offers the TPS7B87xx-Q1 series, which shares similar low-noise architecture but includes AEC-Q200 stress testing, enhanced ESD robustness, and automotive-specific qualification documentation. The TPS79920YZUT remains suitable for non-automotive high-reliability systems.

What is the thermal resistance (RθJA) of the TPS79920YZUT in its YZU DSBGA package?

The TPS79920YZUT in the YZU DSBGA package has a junction-to-ambient thermal resistance (R_θJA) of 143.3°C/W under standard JEDEC JESD51-7 conditions (2-layer board, 1-in² copper). This value assumes proper thermal via placement under the exposed die pad connected to a solid ground plane. With optimized layout (4+ thermal vias, 2-oz copper, inner-layer thermal planes), actual R_θJA can improve to ~65°C/W - critical for sustaining 200 mA in compact wearable enclosures.

How does the enable (EN) pin behavior differ between the TPS79920YZUT and adjustable-output TPS799 variants?

The EN pin functionality is identical across all TPS799 variants: active-high, TTL/CMOS-compatible, with V_EN(HI) ≥ 1.2 V to enable and V_EN(LO) ≤ 0.4 V to shut down. However, the TPS79920YZUT (fixed 2.0 V) lacks an FB pin and instead features NR - so EN toggling triggers inrush current limiting and overshoot detection as described in the functional block diagram. In contrast, adjustable versions replace NR with FB and use the same EN logic but lack the dedicated noise-reduction path. The TPS79920YZUT's EN response time is 50 μs with NR cap, per Figure 6-24.