Texas Instruments TPS62086RLTT

Overview

TPS62086RLTT from Texas Instruments is a 3-A synchronous step-down DC/DC converter with fixed 3.3-V output, DCS-Control™ topology, hiccup short-circuit protection, and 2.5-V to 6.0-V input range. It delivers up to 95% efficiency at 3 A, operates in Power Save Mode for light-load efficiency, and supports 100% duty cycle for ultra-low dropout-ideal for battery-powered point-of-load regulation in portable industrial sensors.

For engineers reviewing the TPS62086RLTT datasheet, TPS62086RLTT pinout, TPS62086RLTT application, or TPS62086RLTT equivalent, key selection considerations include its 2-mm × 2-mm VSON-7 package, 17-μA quiescent current, 2.4-MHz PWM switching frequency, power good (PG) open-drain output, and integrated output discharge functionality.

Technical Context

The TPS62086RLTT implements DCS-Control™ architecture-combining voltage-mode control with seamless transition between PWM and Power Save Mode (PSM)-enabling stable regulation across 0–3 A load while maintaining <1.0% output voltage accuracy and excellent transient response. Its internal compensation supports 10–150 μF output capacitors without external loop components.

It features hiccup-mode short-circuit protection triggered after 32 overcurrent events, thermal shutdown at 150°C with 20°C hysteresis, undervoltage lockout at 2.2 V (±0.1 V), and soft-start time of 0.8 ms. The fixed 3.3-V output eliminates external feedback resistors, reducing BOM count and layout area.

Key Specifications

Pinout & Package

TPS62086RLTT uses a 7-pin VSON package with an exposed thermal pad (RLT suffix). The package measures 2.0 mm × 2.0 mm × 0.6 mm and is RoHS-compliant and lead-free.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar step-down converter applications.

Compared with TPS62086RLTT, TPS62087RLTT offers identical reliability and thermal performance but targets 1.8-V loads, while TPS62865RMLR trades hiccup protection and PG for smaller size and adjustable output-making TPS62086RLTT optimal for fixed 3.3-V, safety-critical, or sequenced power systems.

Availability

TPS62086RLTT is available at Aetrix Electronics and suitable for battery-powered applications, point-of-load regulation, and processor supplies requiring stable component supply, long-lifecycle support, and consistent parametric performance across production batches.

Supply support for TPS62086RLTT 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 ICs, embedded processors, and system solutions for industrial, automotive, and personal electronics markets.

The TPS6208x family was engineered for high-efficiency, small-footprint DC/DC conversion in space- and power-constrained portable and industrial systems-emphasizing low quiescent current, robust protection, and simplified design with fixed-output variants like TPS62086RLTT.

FAQ

What is the recommended input capacitor for TPS62086RLTT?

A minimum 10-μF X7R/X5R ceramic capacitor rated for ≥6.3 V should be placed as close as possible between VIN and GND. TI recommends using a 10-μF input cap in parallel with a 1-μF high-frequency bypass cap to suppress switching noise and ensure stable operation across the 2.5–6.0-V input range. This configuration meets the device's low-ESR requirement and prevents input voltage droop during high di/dt load transients.

Does TPS62086RLTT require external feedback resistors?

No, TPS62086RLTT does not require external feedback resistors because it integrates a precision 3.3-V reference and internal resistor divider. The FB pin must be connected directly to the output node to enable fixed-output operation. Adding external resistors would disrupt regulation and void the specified ±1.0% output accuracy. This simplifies layout and reduces component count versus adjustable versions like TPS62085.

How does the hiccup short-circuit protection work in TPS62086RLTT?

TPS62086RLTT triggers hiccup protection after detecting 32 consecutive switch current limit events (ILIM ≈ 4.6 A). It then disables switching, activates the 260-Ω output discharge path via VOS, and waits ~66 μs before attempting automatic restart. This cycle repeats until the fault clears. Unlike latch-off protection, hiccup mode prevents thermal damage while allowing self-recovery-critical for unattended field-deployed equipment using TPS62086RLTT.

Can TPS62086RLTT operate with a 2.5-V input and 3.3-V output?

No, TPS62086RLTT cannot regulate 3.3 V from a 2.5-V input because VIN must exceed VOUT by at least the dropout margin. At 3 A, minimum input is ~3.5 V (calculated as VOUT + IOUT × RDS(on,H)). However, TPS62086RLTT supports 100% duty cycle mode down to VIN = VOUT under light loads. For true 2.5-V-to-3.3-V boosting, a separate boost converter is required-TPS62086RLTT is strictly a step-down device.

What is the thermal performance of TPS62086RLTT in its VSON-7 package?

TPS62086RLTT in the 2-mm × 2-mm VSON-7 (RLT) package has a junction-to-board thermal resistance (RθJB) of 17.1°C/W and junction-to-ambient (RθJA) of 107.8°C/W with standard JEDEC 2-layer board layout. With proper PCB copper pour under the exposed thermal pad, it sustains 3 A continuous output at ambient temperatures up to 85°C. Derating is required above 100°C ambient or with limited airflow-TI provides detailed layout guidelines in Section 11 of the SLVSB70C datasheet for TPS62086RLTT.