Texas Instruments TLV71128512DSER

Overview

TLV71128512DSER from Texas Instruments is a dual-channel, low-quiescent-current LDO regulator in a 1.5mm × 1.5mm SON-6 package, delivering 2.8V and 1.2V outputs at up to 200mA per channel with 2% output accuracy over –40°C to +125°C and 150mV dropout at 200mA (VOUT = 2.8V). It powers core and I/O rails in space-constrained portable devices such as smartphones and MP3 players.

For engineers reviewing the TLV71128512DSER datasheet, TLV71128512DSER pinout, TLV71128512DSER application, or TLV71128512DSER equivalent, key selection considerations include independent enable control per channel, active pulldown on both EN pins for robust disable behavior during GPIO indeterminate states, and stability with ≥0.1µF ceramic output capacitance.

Technical Context

The TLV71128512DSER integrates two independent PMOS-based LDO regulators, each with dedicated bandgap reference and feedback loop to minimize crosstalk between channels. Its EN1/EN2 pins feature internal pull-down resistors (TLV711-D series), ensuring reliable shutdown when driving signals float or enter high-impedance states.

Each regulator supports input voltages from 2.0V to 5.5V and provides fixed 2.8V (OUT1) and 1.2V (OUT2) outputs. The device includes over-current and thermal shutdown protection, with undervoltage lockout (UVLO) activating below 1.9V VIN and thermal reset occurring at +145°C after shutdown at +165°C.

Key Specifications

Pinout & Package

Package: 1.5mm × 1.5mm SON-6 (DSE), thermally enhanced exposed pad, 0.5mm pitch.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV71128512DSER, TLV7112812DSER requires external pull-downs for safe EN behavior, while TPS7A202812PDBVR offers lower IQ but larger package and no built-in EN pulldown - making TLV71128512DSER optimal for space-constrained, GPIO-driven portable designs requiring fail-safe enable control.

Availability

TLV71128512DSER is available at Aetrix Electronics and suitable for smartphone baseband power, wearable sensor hubs, MP3 player audio codecs, and industrial handheld terminals requiring stable component supply with guaranteed long-term availability.

Supply support for TLV71128512DSER 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 for portable and industrial applications.

The TLV711 series is designed for power-sensitive portable electronics, delivering dual-rail regulation with ultra-low IQ, robust enable behavior, and minimal PCB area - targeting smartphones, wearables, and handheld devices where battery life and board space are critical.

FAQ

What are the fixed output voltages of the TLV71128512DSER?

The TLV71128512DSER provides two factory-programmed fixed output voltages: 2.8V on OUT1 (pin 6) and 1.2V on OUT2 (pin 5). These values are laser-trimmed during manufacturing and cannot be adjusted externally. Both outputs maintain ±2% accuracy across –40°C to +125°C junction temperature and full load range.

Does the TLV71128512DSER require external pull-down resistors on EN1 and EN2?

No, the TLV71128512DSER does not require external pull-down resistors on EN1 or EN2. As a TLV711-D series device, it integrates internal 150kΩ pull-down resistors on both enable pins, ensuring automatic shutdown when GPIOs are high-impedance or un-driven - a key reliability feature for portable systems with complex power sequencing.

What is the minimum output capacitance required for stability with the TLV71128512DSER?

The TLV71128512DSER is stable with an effective output capacitance of 0.1µF or greater. A 1µF X5R/X7R ceramic capacitor is recommended for optimal transient response and PSRR, but smaller 0.1µF units (e.g., 0201-size) are sufficient for basic stability in space-constrained layouts - provided ESR remains below 200mΩ.

How does the TLV71128512DSER handle over-current or thermal faults?

Under over-current, the TLV71128512DSER limits output current to ~220–550mA (depending on VOUT and temperature) and enters constant-current mode. If sustained, power dissipation triggers thermal shutdown at +165°C. After cooling to +145°C, the device auto-restarts. This cycle repeats only if the fault persists - protecting both the TLV71128512DSER and downstream circuitry without latch-up.

Can the TLV71128512DSER be used with a 1.8V input supply?

No, the TLV71128512DSER cannot operate reliably with a 1.8V input. Its absolute minimum input voltage is 2.0V, and undervoltage lockout (UVLO) disables regulation below 1.9V. For the 2.8V output, a minimum input of ~2.95V (2.8V + 150mV dropout) is required at 200mA load - so 1.8V is electrically insufficient for either output rail.