Texas Instruments TPS79912YZUR

Overview

TPS79912YZUR from Texas Instruments is a 200-mA, low-quiescent-current (40 μA), ultralow-noise (10.5 × V_OUT μV_RMS), high-PSRR (66 dB @ 1 kHz) low-dropout linear regulator in a 5-bump DSBGA package (0.97 mm × 1.34 mm). It delivers fixed 1.2 V output with ±2% accuracy over –40°C to +125°C and supports RF power amplifiers, VCOs, and precision analog circuits requiring clean, stable bias.

For engineers reviewing the TPS79912YZUR datasheet, TPS79912YZUR pinout, TPS79912YZUR application, or TPS79912YZUR equivalent, this page provides verified electrical specs, validated DSBGA pin functions, confirmed noise-reduction capacitor interface behavior, and real-world transient response data for portable RF and wearable electronics designs.

Technical Context

The TPS79912YZUR uses a PMOS pass element with 100 mV typical dropout at 200 mA, enabling operation with minimal input–output headroom. Its high-gain, high-bandwidth error amplifier delivers fast line/load transient response and maintains 66 dB PSRR at 1 kHz even with 1.0 V headroom.

It integrates an active overshoot-detection circuit that engages a 350-Ω pulldown resistor when V_OUT exceeds nominal by ≥5%, and features inrush current limiting during EN toggle start-up. The NR pin enables external 0.01-μF bypassing of bandgap noise, reducing total output noise to 12.6 μV_RMS at 1.2 V.

Key Specifications

Pinout & Package

TPS79912YZUR 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. This ultra-compact, low-profile package (0.49 mm max height) targets space-constrained RF modules and wearable PCBs where thermal pad access and board area are critical.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPL720F12PDBVR and TPS7A2012PDQNR, TPS79912YZUR uniquely combines DSBGA-5 packaging, 100 mV dropout at 200 mA, and NR-pin-enabled 12.6 μV_RMS noise - making it the only viable option for space-constrained, noise-sensitive 1.2 V RF bias applications.

Availability

TPS79912YZUR is available at Aetrix Electronics and suitable for base station RF modules, wearable health sensors, Bluetooth LE audio earbuds, and Wi-Fi 6E transceivers requiring stable component supply with full traceability and long-term lifecycle support.

Supply support for TPS79912YZUR 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 designing analog ICs, embedded processors, and connectivity solutions for industrial, automotive, and personal electronics markets.

The TPS799 family targets ultra-low-noise, high-PSRR power regulation in portable RF and precision analog systems - specifically engineered for VCOs, LNAs, ADCs, and wearables where noise, size, and quiescent current are critical.

FAQ

What is the maximum input voltage for TPS79912YZUR?

The absolute maximum input voltage for TPS79912YZUR is 7.0 V, but the recommended operating range is 2.7 V to 6.5 V. Operation below 2.7 V is prohibited unless V_OUT + V_DO is less than 2.7 V - which does not apply to the 1.2 V output, so minimum valid input is 1.3 V (1.2 V + 100 mV dropout). Exceeding 7.0 V risks permanent damage per Absolute Maximum Ratings.

Does TPS79912YZUR require an input capacitor?

TPS79912YZUR does not require an input capacitor for stability, but TI recommends a 0.1–1 μF low-ESR ceramic capacitor near the IN pin to improve source impedance, transient response, and PSRR - especially when the device is located >1 inch from the power source or shares input rails with noisy DC/DC converters. This is explicitly stated in Section 8.2.2.1 of the datasheet.

How does the NR pin function on TPS79912YZUR?

The NR pin on TPS79912YZUR is specific to fixed-output versions and provides a dedicated node to connect a 0.01-μF ceramic capacitor that bypasses internal bandgap reference noise. When used, it reduces total output noise from ~94 × V_OUT to 10.5 × V_OUT μV_RMS - yielding 12.6 μV_RMS at 1.2 V. This pin is unconnected in adjustable versions and must not be left floating in fixed versions.

What is the thermal performance of TPS79912YZUR in its DSBGA package?

TPS79912YZUR in the YZU (DSBGA-5) package has a junction-to-board thermal resistance (R_θJB) of 84.7°C/W and junction-to-case (top) resistance (R_θJC(top)) of 1.1°C/W. Its small 0.97 mm × 1.34 mm footprint limits heat spreading, so PCB copper area under the thermal pad is critical. The device activates thermal shutdown at 165°C and resets at 145°C, as verified in Section 6.5 Electrical Characteristics.

Can TPS79912YZUR be used without load current?

Yes, TPS79912YZUR is stable with zero load current, but its output voltage accuracy specification (±2%) requires a minimum load of 500 μA. Below this, output voltage may deviate beyond tolerance - particularly at high junction temperatures near +125°C. For always-on sensor nodes drawing microamps, a 10-kΩ bleed resistor to ground ensures compliance with accuracy specs while adding only 0.12 mW loss.