Texas Instruments TLV71128518DDSET

Overview

TLV71128518DDSET from Texas Instruments is a dual-channel, low-quiescent-current LDO regulator with fixed 2.8V and 1.8V outputs, 200mA per channel, 150mV dropout at full load, ±2% output accuracy over –40°C to +125°C, and integrated EN1/EN2 enable control - used for independent power rail generation in portable RF subsystems.

For engineers reviewing the TLV71128518DDSET datasheet, TLV71128518DDSET pinout, TLV71128518DDSET application, or TLV71128518DDSET equivalent, key selection criteria include dual-rail sequencing capability, low-noise 48µV_RMS output, 70dB PSRR at 1kHz, active pulldown on outputs, and 1.5mm × 1.5mm SON-6 footprint for space-constrained handheld designs.

Technical Context

The TLV71128518DDSET integrates two independent PMOS-based LDO regulators sharing a common input but featuring dedicated VREF and EN pins per channel, enabling asynchronous enable/disable and minimizing crosstalk between outputs. Each regulator includes internal current limiting (220–550mA), thermal shutdown (+165°C trip), and undervoltage lockout (1.9V VIN threshold).

It features EN pin pull-down resistors (6mA I_EN sink) to ensure reliable disable during GPIO three-state conditions, and supports stable operation with ≥0.1µF ceramic output capacitance - unlike legacy LDOs requiring larger ESR or minimum COUT.

Key Specifications

Pinout & Package

Package: 1.5mm × 1.5mm SON-6 (DSE), thermally enhanced, exposed pad (not electrically connected).

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV71128518DDSET, TPL7112818DDSET offers identical functionality with updated manufacturing flow, while TPS7A202818DQNR trades pulldown capability and footprint for superior noise rejection and quiescent performance - making TLV71128518DDSET optimal for cost-sensitive, space-constrained RF handhelds requiring guaranteed output discharge.

Availability

TLV71128518DDSET is available at Aetrix Electronics and suitable for smartphone baseband power, wireless headset audio cores, portable medical sensor hubs, industrial handheld scanners, and other applications requiring stable component supply with tight voltage tolerance and low thermal profile.

Supply support for TLV71128518DDSET 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 and embedded processing chips for industrial, automotive, and personal electronics markets.

The TLV711 series was developed specifically for portable RF applications demanding dual low-noise, low-I_Q rails in minimal footprint - emphasizing dropout efficiency, sequencing flexibility, and robustness in battery-powered environments.

FAQ

What are the exact output voltages and tolerances of the TLV71128518DDSET?

The TLV71128518DDSET delivers precisely 2.8V on OUT1 and 1.8V on OUT2, each with ±2% DC accuracy over the full operating temperature range of –40°C to +125°C. This tolerance is guaranteed under all load conditions up to 200mA per channel and input voltages from 2.0V to 5.5V, as verified in the SBVS142A datasheet's Electrical Characteristics table.

Does the TLV71128518DDSET support independent enable control for each output?

Yes, the TLV71128518DDSET provides fully independent EN1 and EN2 pins - allowing asynchronous turn-on/off of the 2.8V and 1.8V outputs. EN1 controls OUT1, EN2 controls OUT2, and each has a 0.9V enable threshold with internal 6mA pulldown, ensuring deterministic disable behavior even when driving microcontroller GPIOs in high-impedance state.

What is the minimum output capacitance required for stability with the TLV71128518DDSET?

The TLV71128518DDSET is stable with an effective output capacitance of 0.1µF or greater - achievable using standard X5R/X7R ceramic capacitors. While 1µF is recommended for optimal transient response and PSRR, the device does not require high-ESR or tantalum capacitors, simplifying design and reducing cost versus older LDO families.

How does the active pulldown feature of the TLV71128518DDSET improve system reliability?

The TLV71128518DDSET's active pulldown rapidly discharges both OUT1 and OUT2 when either EN pin is deasserted, preventing back-powering of downstream ICs (e.g., FPGAs or sensors) that could cause latch-up or data corruption. This eliminates the need for external bleed resistors and ensures safe, controlled power-down in portable devices with mixed-voltage domains.

Is the TLV71128518DDSET compatible with 3.3V and 5V input rails?

Yes, the TLV71128518DDSET accepts input voltages from 2.0V to 5.5V, making it compatible with both 3.3V and 5V intermediate rails. At 3.3V input, its 150mV dropout enables full 200mA delivery to the 2.8V rail; at 5V input, it supports higher裕度 for noisy environments or aging batteries, while maintaining ±2% regulation and 70dB PSRR.