Texas Instruments TLV71125125DSER

Overview

TLV71125125DSER from Texas Instruments is a dual-channel, 200mA low-dropout linear regulator with fixed 2.5V and 1.25V outputs, 2% accuracy over –40°C to +125°C, 150mV dropout at 200mA (VOUT = 2.8V), and 35µA quiescent current per channel - designed for power-sensitive portable devices including smartphones and handheld audio.

For engineers reviewing the TLV71125125DSER datasheet, TLV71125125DSER pinout, TLV71125125DSER application, or TLV71125125DSER equivalent, key selection criteria include dual independent enable control (EN1/EN2), active pulldown on outputs, EN pin pull-down resistors (D-suffix), 1.5mm × 1.5mm SON-6 package, and stability with ≥0.1µF ceramic output capacitance.

Technical Context

The TLV71125125DSER integrates two independent PMOS-based LDO regulators sharing a common input (IN) and ground (GND), each with dedicated reference, error amplifier, and pass element. Each channel features dedicated VREF to minimize crosstalk between outputs.

It includes thermal shutdown (trip at +165°C, reset at +145°C), over-current protection with 220–550mA current limit, undervoltage lockout (UVLO at 1.9V VIN rising), and EN pin pull-down resistors - enabling reliable disable during weak GPIO states in processor-powered systems.

Key Specifications

Pinout & Package

Package: 1.5mm × 1.5mm SON-6 (DSE), wettable flank, 0.5mm pitch, exposed thermal pad (GND-connected).

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV71025125DSER, TLV71125125DSER reduces design risk by eliminating external pull-down components and improves system reliability during MCU boot; TPL7407LDR is not a functional substitute as it provides switching, not regulation.

Availability

TLV71125125DSER is available at Aetrix Electronics and suitable for smartphone baseband power, portable audio codec supply, and industrial handheld scanner applications requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for TLV71125125DSER 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 belongs to TI's low-I_Q dual-LDO product line, engineered specifically for battery-powered devices needing independent, sequenced, low-noise dual-rail supplies with minimal quiescent current.

FAQ

What are the fixed output voltages of the TLV71125125DSER?

The TLV71125125DSER provides two fixed output voltages: 2.5V on OUT1 and 1.25V on OUT2. These values are factory-programmed using OTP technology and cannot be adjusted externally. Both outputs maintain ±2% accuracy across –40°C to +125°C junction temperature and full load range, making TLV71125125DSER suitable for precision analog and digital core supplies in portable systems.

Does TLV71125125DSER require external pull-down resistors on EN1 and EN2?

No, TLV71125125DSER does not require external pull-down resistors on EN1 or EN2. The "D" suffix indicates integrated ~6kΩ pull-down resistors on both enable pins, ensuring the regulators remain disabled during power-up, MCU reset, or floating GPIO states. This eliminates BOM cost and layout area needed for external resistors, simplifying design validation for TLV71125125DSER in space-constrained applications.

What is the minimum output capacitance required for TLV71125125DSER stability?

The TLV71125125DSER is stable with an effective output capacitance of 0.1µF or greater - typically achieved using X5R/X7R ceramic capacitors in 0201 or 0402 packages. Unlike many LDOs, TLV71125125DSER does not require high-ESR tantalum or specific capacitor types. The 0.1µF minimum enables compact, low-cost designs while maintaining >60° phase margin across temperature and load conditions.

How does the active pulldown feature benefit TLV71125125DSER in portable systems?

The active pulldown circuit in TLV71125125DSER rapidly discharges OUT1 and OUT2 when either regulator is disabled, preventing floating voltages that could cause latch-up or undefined logic states in downstream circuits. This is especially valuable in portable systems with mixed-signal ICs (e.g., codecs, sensors), where uncontrolled discharge through parasitic paths degrades startup timing and increases system-level power-up failures. TLV71125125DSER's pulldown operates independently per channel.

Can TLV71125125DSER operate from a single-cell Li-ion battery?

Yes, TLV71125125DSER supports input voltages from 2.0V to 5.5V, making it compatible with single-cell Li-ion batteries (nominal 3.7V, operating range ~3.0V–4.2V). With a 150mV dropout at 200mA (for VOUT = 2.8V), TLV71125125DSER delivers regulated 2.5V and 1.25V down to ~2.65V input - well within typical Li-ion discharge curves. Its 35µA quiescent current per channel further extends usable battery capacity in standby modes.