Texas Instruments TPS799185YZUT

Overview

TPS799185YZUT from Texas Instruments is a 200-mA, fixed-output 1.85-V low-dropout linear regulator in a 5-bump DSBGA package (0.97 mm × 1.34 mm), featuring 40 μA quiescent current, 100 mV dropout at 200 mA, 66 dB PSRR at 1 kHz, and ±2% output accuracy over –40°C to +125°C - designed for powering noise-sensitive RF circuitry in compact wireless devices.

For engineers reviewing the TPS799185YZUT datasheet, TPS799185YZUT pinout, TPS799185YZUT application, or TPS799185YZUT equivalent, this page delivers verified package mapping, validated pin functions, confirmed noise-reduction capacitor interface, and real-world RF power rail design context - all grounded in TI's SBVS056L production data sheet.

Technical Context

The TPS799185YZUT employs a PMOS pass transistor architecture enabling ultralow dropout (100 mV typical at 200 mA) and high PSRR (66 dB @ 1 kHz) even at minimal headroom (VIN – VOUT = 0.25 V). Its precision bandgap reference and feedback loop deliver ±2% total output accuracy across load, line, and temperature.

It integrates inrush current protection triggered by EN toggle, overshoot detection with active pulldown (~350 Ω), and a dedicated NR pin for external 0.01-μF noise-reduction capacitor - reducing output noise to 10.5 × VOUT μVRMS (10 Hz–100 kHz) when used.

Key Specifications

Pinout & Package

TPS799185YZUT 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, optimized for space-constrained RF modules and wearable PCBs.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS799185YZUT, TPS799185DDCR offers identical regulation performance in a more manufacturable SOT package but sacrifices board-area efficiency and thermal performance; LP5907MFX-1.85/NOPB trades PSRR and noise-filtering flexibility for lower IQ and simpler layout, making it suitable only where input ripple is pre-conditioned.

Availability

TPS799185YZUT is available at Aetrix Electronics and suitable for RF power amplifiers, VCO bias rails, wearable sensor hubs, and smartphone camera ISP cores requiring stable component supply, consistent DSBGA packaging, and guaranteed long-term lifecycle support.

Supply support for TPS799185YZUT 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 decades of LDO innovation focused on power integrity for high-performance systems.

The TPS799 product line was engineered specifically for RF and precision analog applications demanding ultralow noise, high PSRR, and minimal quiescent current - targeting wireless infrastructure, mobile handsets, and high-fidelity sensor interfaces.

FAQ

What is the maximum input voltage rating for the TPS799185YZUT?

The TPS799185YZUT 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., ≥1.95 V for 1.85 V output), ensuring regulation is maintained without dropout violation.

Does the TPS799185YZUT require an external noise-reduction capacitor?

The TPS799185YZUT does not require an external noise-reduction capacitor to function, but connecting a 0.01-μF ceramic capacitor to the NR pin reduces output noise to 10.5 × VOUT μVRMS (10 Hz–100 kHz) and improves PSRR - critical for VCO and RF PA applications. Without it, noise rises to ~94 × VOUT μVRMS.

Can the TPS799185YZUT be used without an enable signal?

Yes - the EN pin of the TPS799185YZUT can be tied directly to IN for always-on operation. This configuration eliminates external control logic and reduces component count, while maintaining full regulation performance and 40 μA quiescent current during normal operation.

What is the thermal resistance (RθJB) of the TPS799185YZUT DSBGA package?

The TPS799185YZUT in YZU (DSBGA) package has a junction-to-board thermal resistance (RθJB) of 84.7°C/W, measured per JEDEC JESD51-8. This value reflects efficient heat transfer from the die through the solder balls into the PCB copper, supporting reliable operation at 200 mA in compact layouts with ≥1 oz copper and thermal vias.

Is the TPS799185YZUT stable with 1-μF output capacitance?

No - the TPS799185YZUT is specified and tested for stability with ≥2.2 μF ceramic output capacitance (X5R/X7R, ESR <1.0 Ω). Using 1 μF violates the minimum capacitance requirement and may cause oscillation or degraded transient response, especially under load steps or low-temperature conditions.