Texas Instruments TLV70019DDCT

Overview

TLV70019DDCT from Texas Instruments is a 200-mA, low-quiescent-current, low-dropout linear regulator with fixed 1.9-V output, designed for power-sensitive portable applications. It delivers 2% output accuracy, 31-μA quiescent current, 43-mV dropout at 50 mA (V_OUT = 2.8 V), and operates from 2-V to 5.5-V input. It powers core logic rails in battery-operated handheld devices where efficiency and transient response are critical.

For engineers reviewing the TLV70019DDCT datasheet, TLV70019DDCT pinout, TLV70019DDCT application, or TLV70019DDCT equivalent, key selection considerations include its 1.5-mm × 1.5-mm WSON-6 package, enable-controlled shutdown (1-μA I_SHDN), stability with ≥0.1-μF ceramic output capacitance, high PSRR (68 dB @ 1 kHz), and thermal/overcurrent protection - all validated across –40°C to +125°C junction temperature.

Technical Context

The TLV70019DDCT uses a PMOS pass transistor architecture enabling ultra-low dropout voltage that scales with load current (e.g., 43 mV @ 50 mA, 175 mV @ 200 mA @ V_OUT = 2.35 V). Its precision bandgap reference and error amplifier ensure ±2% DC accuracy over full temperature and line/load conditions.

It integrates active-high enable (VEN_H = 0.9 V, VEN_L = 0.4 V), undervoltage lockout (UVLO = 1.9 V), thermal shutdown (trip = 160°C, reset = 140°C), and foldback current limiting (ICL = 220–860 mA). The device remains stable with output capacitance as low as 0.1 μF, supporting compact, cost-effective X5R/X7R ceramic capacitors under bias and temperature derating.

Key Specifications

Pinout & Package

TLV70019DDCT is housed in a 1.5-mm × 1.5-mm, 6-pin WSON (DSE) package with wettable flanks, optimized for space-constrained PCB layouts and automated optical inspection (AOI).

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLS850F0TESK and TPS7A0519PDBVR, TLV70019DDCT offers the optimal balance of ultra-low dropout, 0.1-μF stability, enable control, and compact WSON-6 packaging - making it preferred for consumer portable designs where size, cost, and design flexibility are prioritized over automotive qualification or absolute lowest IQ.

Availability

TLV70019DDCT is available at Aetrix Electronics and suitable for wireless handsets, Bluetooth audio devices, ZigBee network nodes, and Li-ion powered portable medical sensors requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for TLV70019DDCT 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 design expertise and broad automotive, industrial, and consumer portfolio coverage.

The TLV700 series was engineered specifically for portable battery-powered equipment - emphasizing low IQ, fast transient response, small footprint, and robust protection - targeting smartphones, wearables, and wireless sensor nodes.

FAQ

What is the minimum input voltage required for TLV70019DDCT to regulate 1.9 V?

The TLV70019DDCT requires VIN ≥ VOUT + VDO. With a typical dropout of 43 mV at 50 mA, the minimum functional input is ~1.943 V. However, per Recommended Operating Conditions, VIN must be ≥2.0 V to guarantee specification compliance across temperature and process variation - below this, UVLO (1.9 V) may disable regulation or cause instability.

Can TLV70019DDCT operate without an input capacitor?

While the TLV70019DDCT does not require an input capacitor for stability, TI strongly recommends a 0.1–1 μF low-ESR ceramic capacitor from IN to GND. This suppresses input source impedance effects, improves load transient response, and enhances PSRR - especially critical when the device is remote from the power source or driven by high-impedance supplies.

Is TLV70019DDCT compatible with 0.1-μF output capacitance across temperature and bias?

Yes - TLV70019DDCT is explicitly characterized and guaranteed stable with ≥0.1 μF effective output capacitance, defined as the capacitance value after accounting for DC bias and temperature derating. This enables use of compact 0201/0402 X5R/X7R ceramics, unlike legacy LDOs requiring ≥2.2 μF.

What happens to TLV70019DDCT output during thermal shutdown?

When junction temperature reaches ~160°C, TLV70019DDCT disables the output and enters thermal shutdown. The device remains off until junction temperature cools to ~140°C, then automatically resumes regulation. During cycling, output voltage collapses and recovers - design must ensure this behavior does not disrupt system state or cause latch-up in downstream circuitry.

Does TLV70019DDCT support reverse voltage protection?

No - TLV70019DDCT contains a body diode from OUT to IN in its PMOS pass element. If VOUT exceeds VIN, uncontrolled reverse current flows. For applications with potential reverse bias (e.g., hot-swap, backup battery), an external Schottky diode or ideal diode controller must be added to block reverse conduction and limit current to ≤5% of rated output.