Texas Instruments TLV7111518DDSER

Overview

TLV7111518DDSER from Texas Instruments is a dual-channel, 200mA low-dropout linear regulator with fixed 1.5V and 1.8V outputs, 2% accuracy over –40°C to +125°C, 150mV dropout at 200mA (VOUT = 2.8V), and integrated EN1/EN2 enable pins with internal pull-down resistors. It powers core and I/O rails in portable wireless handsets and smart phones.

For engineers reviewing the TLV7111518DDSER datasheet, TLV7111518DDSER pinout, TLV7111518DDSER application, or TLV7111518DDSER equivalent, key selection criteria include dual independent enable control, active pulldown for safe shutdown during indeterminate GPIO states, 70dB PSRR at 1kHz, and stability with ≥0.1µF ceramic output capacitance.

Technical Context

The TLV7111518DDSER implements two independent PMOS-based LDO regulators sharing a common input but featuring dedicated VREF and output stages to minimize crosstalk. Each channel includes thermal shutdown, over-current protection, and undervoltage lockout at 1.9V.

Its EN1/EN2 pins incorporate internal pull-down resistors (6mA typical) to ensure reliable disable when driving signals float - a design specifically for microcontroller GPIO interfaces during power-up or reset. The device operates from 2.0V to 5.5V input and delivers regulated 1.5V/1.8V outputs with dedicated ground return paths per channel.

Key Specifications

Pinout & Package

Package: 1.5mm × 1.5mm SON-6 (DSE), thermally enhanced, exposed pad (GND-connected), RoHS-compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLC7701QDSET and TPS7A2018PDQNR, the TLV7111518DDSER uniquely integrates two precisely trimmed outputs with safety-critical EN pull-downs in a space-saving 1.5mm × 1.5mm package - enabling true dual-rail power management without compromise.

Availability

TLV7111518DDSER is available at Aetrix Electronics and suitable for smartphone application processor core rails, wireless handset RF front-end biasing, and portable audio codec supplies requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for TLV7111518DDSER 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 ICs for industrial, automotive, and consumer applications.

The TLV711 series belongs to TI's low-power LDO portfolio designed specifically for battery-powered portable devices demanding high PSRR, ultra-low IQ, and robust enable control - with the TLV7111518DDSER optimized for dual-rail smartphone and PDA power architectures.

FAQ

What are the fixed output voltages of the TLV7111518DDSER?

The TLV7111518DDSER provides two factory-programmed fixed outputs: 1.5V on OUT1 and 1.8V on OUT2. These values are set via on-chip OTP memory and require no external resistors. Both outputs maintain ±2% accuracy across –40°C to +125°C junction temperature and load currents up to 200mA each. This dual-voltage configuration makes TLV7111518DDSER ideal for powering core and I/O domains simultaneously.

Does the TLV7111518DDSER require external pull-down resistors on EN1 and EN2?

No, the TLV7111518DDSER does not require external pull-down resistors on EN1 or EN2. It integrates internal 150kΩ pull-down resistors on both enable pins - a defining feature of the "D" suffix in the part number. This ensures the regulators remain disabled during MCU power-up, reset, or GPIO floating states, eliminating risk of unintended power-on. TLV7111518DDSER thus reduces BOM count and improves system reliability in portable designs.

What is the minimum output capacitance required for stability with the TLV7111518DDSER?

The TLV7111518DDSER is stable with an effective output capacitance of 0.1µF or greater. While 1µF X5R/X7R ceramic capacitors are recommended for optimal PSRR and transient performance, the device tolerates smaller values - including 0.1µF - provided the effective capacitance (accounting for DC bias and temperature derating) remains ≥0.1µF. This flexibility allows use of compact 0201/0402 case sizes in space-constrained layouts without compromising stability.

How does the TLV7111518DDSER handle over-current or thermal faults?

When an over-current or thermal fault occurs, the TLV7111518DDSER enters current-limit mode, sourcing a fixed current independent of output voltage. If the fault persists, thermal shutdown activates at +165°C (trip) and resets at +145°C (release). The device then auto-recovers once temperature falls below the hysteresis threshold. This cycle protects both the TLV7111518DDSER and downstream circuitry without requiring external intervention or latch-up behavior.

Can the TLV7111518DDSER be used with input voltages below 2.0V?

No, the TLV7111518DDSER has a specified minimum input voltage of 2.0V per Absolute Maximum Ratings and Electrical Characteristics tables. Operation below 2.0V may result in loss of regulation, unpredictable enable behavior, or failure to meet dropout and accuracy specifications. For applications requiring sub-2.0V input, alternative LDOs with lower VIN minima - such as the TPS7A05 series - should be evaluated. TLV7111518DDSER is designed for 2.0V–5.5V operation in standard Li-ion/Li-poly battery-powered systems.