Texas Instruments TLV70242PDSER

Overview

TLV70242PDSER from Texas Instruments is a 4.2 V fixed-output, 300-mA low-dropout (LDO) linear regulator in a 6-pin WSON package, featuring 2% output accuracy, 35 μA quiescent current, and active pulldown (120 Ω) for fast output discharge-designed for Li-ion battery-powered handheld devices requiring stable low-noise supply under light-load and transient conditions.

For engineers reviewing the TLV70242PDSER datasheet, TLV70242PDSER pinout, TLV70242PDSER application, or TLV70242PDSER equivalent, key selection criteria include dropout voltage at 300 mA (260–375 mV), PSRR of 68 dB at 1 kHz, thermal shutdown (165°C), UVLO (1.9 V), and compatibility with ≥0.1 μF ceramic output capacitors-critical for space-constrained portable RF and wireless applications.

Technical Context

The TLV70242PDSER uses a PMOS pass transistor to achieve low dropout and maintains regulation down to 260 mV at 300 mA load. Its precision bandgap reference and error amplifier deliver ±2% DC accuracy across –40°C to +125°C junction temperature.

It integrates active pulldown (120 Ω) for rapid output discharge during shutdown, supports input voltages from 2 V to 5.5 V, and remains stable with output capacitance as low as 0.1 μF-enabling use of small-footprint, bias-voltage-derated ceramics without compromising stability.

Key Specifications

Pinout & Package

TLV70242PDSER is housed in a 1.5 mm × 1.5 mm, 6-pin WSON (DSE) package with wettable flanks, optimized for automated optical inspection (AOI) and thermal performance (R_θJA = 321.3°C/W, R_θJC(bot) = 142.3°C/W).

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLS850F0TESK and MCP1700T-4202E/TT, TLV70242PDSER uniquely balances 300 mA capability, 4.2 V output, active pulldown, and 1.5 mm × 1.5 mm WSON packaging-making it optimal for space- and sequencing-constrained portable RF designs where all three attributes are simultaneously required.

Availability

TLV70242PDSER is available at Aetrix Electronics and suitable for smartphone power rails, Bluetooth audio SoC supplies, Zigbee end-node sensor hubs, WLAN mini-PCIe cards, and Li-ion battery management subsystems requiring stable component supply with guaranteed long-term manufacturability.

Supply support for TLV70242PDSER 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 company specializing in analog and embedded processing technologies, with leadership in power management ICs, signal chain solutions, and high-reliability design methodologies.

The TLV702 series was developed specifically for battery-powered portable electronics, emphasizing ultra-low quiescent current, small-package stability, and integrated protection-targeting smartphones, wearables, and wireless sensor nodes.

FAQ

What is the maximum input voltage rating for TLV70242PDSER?

The absolute maximum input voltage for TLV70242PDSER is 6.0 V, as specified in the Absolute Maximum Ratings table. Operation above this voltage risks permanent damage. For reliable continuous operation, TI recommends staying within the recommended input range of 2 V to 5.5 V, ensuring sufficient headroom above the 4.2 V output to maintain regulation under load and temperature variation.

Does TLV70242PDSER require an input capacitor?

While TLV70242PDSER does not require an input capacitor for stability, TI strongly recommends using a 0.1–1 μF low-ESR ceramic capacitor between IN and GND. This improves transient response, reduces input ripple coupling, and mitigates voltage excursions caused by source impedance or fast load changes-especially critical when the device is located remotely from the power source or shares a rail with switching regulators.

How does the active pulldown circuit function in TLV70242PDSER?

The TLV70242PDSER includes an internal 120 Ω pulldown resistor activated when the EN pin is driven below 0.4 V. This provides a controlled discharge path for the output capacitor, enabling rapid VOUT decay with a time constant τ ≈ 120 Ω × C_OUT. Unlike passive discharge, this feature ensures deterministic shutdown behavior-critical for preventing backfeeding, meeting sequencing requirements, and avoiding latch-up in multi-rail systems.

Can TLV70242PDSER operate with a 0.1 μF output capacitor?

Yes-TLV70242PDSER is explicitly designed to remain stable with an effective output capacitance of ≥0.1 μF, including bias and temperature derating. This allows use of smaller, lower-cost dielectrics (e.g., X5R/X7R in 0402 or 0201 packages). However, the *rated* capacitor value must exceed 0.1 μF to ensure the *effective* capacitance under operating voltage and temperature stays ≥0.1 μF; maximum ESR must remain ≤200 mΩ.

What thermal protection behavior does TLV70242PDSER exhibit?

TLV70242PDSER activates thermal shutdown at approximately 165°C junction temperature, disabling the output until the die cools to ~145°C, at which point regulation resumes. This hysteresis prevents oscillation near the trip point. Continuous cycling indicates excessive power dissipation-TI specifies a maximum operating junction temperature of 125°C for reliable long-term operation, requiring appropriate PCB copper area and airflow in the final design.