Texas Instruments TPS62826ADMQR

Overview

TPS62826ADMQR from Texas Instruments is a synchronous step-down DC/DC converter delivering up to 3A output current with 1% feedback voltage accuracy (0.594–0.606V) across –40°C to 125°C, 2.4V–5.5V input range, and 0.6V–4.0V adjustable output. It employs DCS-Control topology for fast transient response and operates in power-save mode (PSM) at light loads to maintain high efficiency in portable electronics and SSDs.

For engineers reviewing the TPS62826ADMQR datasheet, TPS62826ADMQR pinout, TPS62826ADMQR application, or TPS62826ADMQR equivalent, key selection criteria include its 2.2MHz fixed-frequency PWM operation, 4μA quiescent current, active output discharge, power-good signal, and thermal shutdown with hiccup protection - all in a 1.5mm × 1.5mm 6-pin VSON-HR (DMQ) package.

Technical Context

The TPS62826ADMQR uses adaptive constant-on-time DCS-Control with stabilized switching frequency, enabling seamless transition between PWM and PSM modes without output voltage disturbance. Its control loop regulates output down to 0.6V via internal 600mV reference and supports 100% duty cycle for ultra-low dropout operation.

It integrates 26mΩ high-side and 25mΩ low-side MOSFETs, features an open-drain power-good (PG) output with 100μs deglitch delay, and implements hiccup short-circuit protection triggered after 32 switching cycles. Shutdown current is 0.05μA, and soft-start time is 1.25ms to 95% of nominal VOUT.

Key Specifications

Pinout & Package

TPS62826ADMQR is housed in a thermally enhanced 6-pin VSON-HR (DMQ) package measuring 1.5mm × 1.5mm with exposed thermal pad on bottom. Pin 4 is GND; pins 1–3 and 5–6 are functional terminals as defined below.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS62826DMQR, the TPS62826ADMQR trades light-load efficiency for fixed-frequency stability and lower ripple - making it preferable in noise-sensitive imaging or high-speed digital systems. Against TPS62825ADMQ, it delivers 50% higher current in identical footprint, enabling consolidation of multiple rails.

Availability

TPS62826ADMQR is available at Aetrix Electronics and suitable for solid state drives, portable electronics, and industrial PCs requiring stable component supply, long-term lifecycle support, and traceable sourcing for production programs.

Supply support for TPS62826ADMQR 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 technologies, with decades of expertise in high-efficiency DC/DC conversion.

The TPS6282x product line was designed for space-constrained, battery-sensitive applications demanding ultra-low IQ, high accuracy, and seamless mode transitions - targeting portable, imaging, and industrial edge devices.

FAQ

What is the switching frequency of the TPS62826ADMQR and how stable is it?

The TPS62826ADMQR operates at a nominal switching frequency of 2.2MHz with tightly controlled variation across input voltage and load conditions. As a forced-PWM device, it maintains continuous conduction mode and avoids frequency modulation - delivering consistent EMI behavior and low output voltage ripple essential for noise-sensitive applications like image sensors and high-speed serial interfaces. This stability is inherent to its DCS-Control architecture and does not require external compensation.

Does the TPS62826ADMQR support output voltages below 1.0V?

Yes, the TPS62826ADMQR supports output voltages from 0.6V to 4.0V using an external resistor divider on the FB pin. Its internal 600mV reference and ±1% accuracy over –40°C to 125°C enable precise low-voltage regulation for modern SoC cores and FPGA I/O banks. For example, setting R2 = 100kΩ and R1 = 100kΩ yields VOUT = 1.2V; scaling R1 further achieves 0.6V with verified stability per TI's recommended LC combinations.

How does the power-good (PG) signal behave during startup and fault conditions?

The TPS62826ADMQR's PG pin is an open-drain output that goes high-impedance only when VFB reaches 96–98% of target (rising) and remains high until VFB falls below 90–94% (falling), with 100μs blanking on rise and 20μs deglitch on fall. It asserts low during EN = low, UVLO (VIN < 2.2V), thermal shutdown (>150°C), or output undervoltage - enabling reliable power sequencing and system-level fault detection without external supervision circuits.

What thermal performance can be expected from the TPS62826ADMQR in a standard 2-layer PCB layout?

In a JEDEC-standard 2-layer board with 1-in² 2oz copper pour under the exposed thermal pad, the TPS62826ADMQR exhibits a junction-to-ambient thermal resistance (RθJA) of 129.5°C/W. At 3A/1.8V output from 5V input (≈85% efficiency), power dissipation is ~0.54W, resulting in ~70°C junction rise above ambient - well within the –40°C to 125°C operating range. Adding internal layers or thermal vias reduces RθJA significantly, as shown on the TPS62826EVM-794 (71.4°C/W).

Can the TPS62826ADMQR be used in a pre-biased output start-up scenario?

Yes, the TPS62826ADMQR supports start-up into a pre-biased output, meaning it can safely begin regulation even when the output capacitor already holds a voltage close to the target VOUT. This capability is enabled by its internal soft-start circuitry and controlled gate drive sequencing, preventing reverse current flow or output overshoot. The soft-start time is fixed at 1.25ms to 95% of nominal VOUT, regardless of initial output voltage level.