Texas Instruments TPS79912YZUT

Overview

TPS79912YZUT from Texas Instruments is a 200-mA, ultra-low-noise, high-PSRR low-dropout linear regulator in a 5-pin DSBGA package (0.97 mm × 1.34 mm), delivering fixed 1.2 V output with 2% total accuracy over –40°C to +125°C, 40 μA quiescent current, and 100 mV dropout at full load - deployed in RF power stages and precision analog rails of wearable electronics and Bluetooth modules.

For engineers reviewing the TPS79912YZUT datasheet, TPS79912YZUT pinout, TPS79912YZUT application, or TPS79912YZUT equivalent, this page delivers verified package mapping, validated noise/PSRR performance at 1 kHz and 10 kHz, confirmed thermal shutdown behavior at 165°C, and real-world transient response data for RF-sensitive LDO selection.

Technical Context

The TPS79912YZUT uses a PMOS pass element with advanced BiCMOS fabrication to achieve 100 mV dropout at 200 mA while maintaining 66 dB PSRR at 1 kHz and 51 dB at 10 kHz. Its internal 1.193-V bandgap reference and precision feedback loop ensure ±2% output accuracy across line, load, and temperature.

Inrush current protection activates immediately on EN toggle, clamping startup surge; an integrated overshoot detection circuit engages a pulldown resistor if VOUT exceeds nominal by >5%, ensuring stable power-up in compact RF subsystems.

Key Specifications

Pinout & Package

TPS79912YZUT is housed in a 5-bump, thin, die-sized ball grid array (DSBGA) package measuring 0.97 mm × 1.34 mm with 0.4-mm pitch, optimized for ultra-compact PCB footprints in wearable and mobile RF designs.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS79912YZUT, the TPS79912DDCR offers identical regulation performance but trades thermal efficiency and size for assembly flexibility, while the MCP1703T-1202E/MB sacrifices RF-grade noise suppression and transient control for ultra-low quiescent current in non-analog applications.

Availability

TPS79912YZUT is available at Aetrix Electronics and suitable for wireless transceivers, wearable sensor nodes, VCO power supplies, and industrial BLE gateways requiring stable component supply with guaranteed long-term manufacturability.

Supply support for TPS79912YZUT 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 RF and precision analog systems demanding ultralow noise, high PSRR, and minimal quiescent current in miniature packages - targeting next-generation wireless, sensing, and portable electronics.

FAQ

What is the maximum input voltage rating for the TPS79912YZUT?

The TPS79912YZUT has an absolute maximum input voltage of 7.0 V, but its recommended operating range is 2.7 V to 6.5 V. Operation below 2.7 V is permitted only if VIN ≥ VOUT + VDO (i.e., ≥1.3 V for 1.2-V output), as specified in Section 6.3 of the datasheet. Exceeding 7.0 V risks permanent damage.

Does the TPS79912YZUT require an external noise-reduction capacitor to achieve its rated output noise?

Yes - the TPS79912YZUT achieves its lowest output noise (12.6 µV_RMS) only when a 0.01-µF ceramic capacitor is connected to the NR pin. Without it, noise rises to ~113 µV_RMS. The NR capacitor bypasses bandgap reference noise and improves PSRR; TI recommends X7R dielectrics with low leakage.

Can the TPS79912YZUT be used in applications requiring zero-load operation?

Yes - the TPS79912YZUT is stable with no output load. However, its specified 2% output accuracy requires a minimum load of 500 µA. Below that, especially near 125°C junction temperature, output voltage may deviate beyond tolerance; design accordingly for open-circuit or high-impedance monitoring use cases.

How does the enable pin (EN) behave during power-up, and what is its leakage current?

The EN pin of the TPS79912YZUT is active-high with V_EN(HI) = 1.2 V (min) and V_EN(LO) = 0.4 V (max). Its leakage current is ≤1 µA when enabled and ≤1 µA when disabled (ISHDN = 0.15–1 µA). Connecting EN directly to IN is permissible if shutdown control is unnecessary.

What thermal metrics apply to the TPS79912YZUT in its YZU (DSBGA) package?

The TPS79912YZUT in the YZU package has R_θJA = 143.3°C/W, R_θJC(top) = 1.1°C/W, and R_θJB = 84.7°C/W. Its exceptionally low junction-to-case (top) resistance enables efficient heat transfer to the PCB via the top-side solder balls, critical for thermal management in sealed wearable enclosures.