Texas Instruments TLV705185YFPT

Overview

TLV705185YFPT from Texas Instruments is a 1.85-V fixed-output, 200-mA low-dropout (LDO) linear regulator in a 0.77-mm × 0.77-mm DSBGA package. It delivers 0.5% output accuracy, 145 mV dropout at 200 mA, 35 μA quiescent current, and 70 dB PSRR at 1 kHz - optimized for Li-ion–powered wireless handsets and Bluetooth devices.

For engineers reviewing the TLV705185YFPT datasheet, TLV705185YFPT pinout, TLV705185YFPT application, or TLV705185YFPT equivalent, key selection considerations include ultra-low profile packaging (0.15-mm max height), stability with only 0.1-μF ceramic output capacitance, enable-controlled shutdown (1 μA I_SHDN), thermal/overcurrent protection, and sub-1-V startup capability under UVLO (1.9 V).

Technical Context

The TLV705185YFPT uses a PMOS pass transistor to achieve low dropout and maintain regulation down to (VIN – VOUT) = 145 mV at full load. Its error amplifier enables ±0.5% DC accuracy across –40°C to +125°C and supports zero-load regulation.

It integrates undervoltage lockout (1.9 V rising threshold), active-high enable logic (0.9 V turn-on, 0.4 V turn-off), and internal thermal shutdown (160°C trip). The device is stable with ≥0.1-μF effective ceramic output capacitance and achieves 26.6 μV_RMS integrated noise (100 Hz–100 kHz) at 1.85 V output.

Key Specifications

Pinout & Package

TLV705185YFPT is housed in a 4-pin, 0.77-mm × 0.77-mm, 0.15-mm maximum height DSBGA (YFPT) package - optimized for space-constrained mobile PCBs and thin-profile assemblies.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPL720F185PDBVR and MCP1700T-1802E/TT, TLV705185YFPT offers superior noise performance (26.6 vs. ≥40 μV_RMS), tighter DC accuracy (±0.5% vs. ±2%), and integrated enable/UVLO - making it the preferred choice for RF-critical, battery-operated systems demanding minimal board area.

Availability

TLV705185YFPT is available at Aetrix Electronics and suitable for wireless handsets, Bluetooth modules, and Zigbee network nodes requiring stable component supply, long-lifecycle support, and consistent DSBGA packaging across production batches.

Supply support for TLV705185YFPT 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 power management technologies, with decades of LDO design expertise for portable and industrial applications.

The TLV705 series was engineered specifically for space- and power-constrained RF portable electronics - delivering ultra-low quiescent current, low noise, and miniature packaging without sacrificing thermal robustness or accuracy.

FAQ

What is the output voltage tolerance of TLV705185YFPT over temperature and load?

The TLV705185YFPT maintains ±0.5% DC output accuracy across –40°C to +125°C junction temperature and 0–200 mA load current, as specified in its electrical characteristics table. This tight tolerance ensures reliable operation of 1.8-V logic interfaces without external trimming or calibration, even under thermal stress or dynamic loading in handheld devices.

Can TLV705185YFPT operate with a 2.0-V input supply?

Yes - TLV705185YFPT supports VIN as low as 2.0 V, which is sufficient to maintain 1.85 V output given its 145-mV dropout at 200 mA. At 200 mA load, minimum required VIN is 1.995 V (1.85 V + 0.145 V), making it fully functional down to end-of-discharge voltage of single-cell Li-ion batteries.

Does TLV705185YFPT require an external pull-up resistor on the EN pin?

No - TLV705185YFPT's EN pin has negligible leakage current (≤0.01 μA) and is compatible with direct connection to VIN for always-on operation. When enable control is needed, it accepts standard 1.2-V or 1.8-V GPIO signals without external level-shifting, thanks to its 0.9-V turn-on threshold.

What is the minimum output capacitance required for stability with TLV705185YFPT?

TLV705185YFPT is stable with a minimum effective output capacitance of 0.1 μF ceramic - verified across temperature and bias conditions. This allows use of compact, low-cost 0402/0201 MLCCs without derating concerns, unlike many legacy LDOs requiring ≥1-μF tantalum or large ceramics.

How does TLV705185YFPT handle reverse voltage at the VOUT pin?

TLV705185YFPT contains a PMOS pass transistor with an intrinsic body diode from VOUT to VIN. If VOUT exceeds VIN, uncontrolled reverse current flows. For applications with possible back-driving (e.g., hot-swap, multi-rail systems), TI recommends adding an external Schottky diode or MOSFET-based reverse-current protection circuit to limit reverse current to ≤5% of rated output current.