Texas Instruments TPS562209DDCT

Overview

TPS562209DDCT from Texas Instruments is a 2-A synchronous step-down DC/DC converter in a 6-pin SOT-23 (DDC) package, featuring D-CAP2™ control mode, 4.5 V to 17 V input range, 0.76 V to 7 V adjustable output, and 650 kHz fixed switching frequency. It integrates 122-mΩ high-side and 72-mΩ low-side MOSFETs and delivers fast transient response for digital TV, STB, and networking terminal power rails.

For engineers reviewing the TPS562209DDCT datasheet, TPS562209DDCT pinout, TPS562209DDCT application, or TPS562209DDCT equivalent, key selection criteria include its D-CAP2™ adaptive on-time control enabling ceramic-capacitor-only designs, 1% VFB accuracy at 25°C, 1.0-ms internal soft-start, cycle-by-cycle over-current protection, and operation across –40°C to 150°C junction temperature.

Technical Context

The TPS562209DDCT employs D-CAP2™ adaptive on-time PWM control-combining an internal ramp-compensated reference with valley-current sensing-to achieve stable regulation without external compensation, even with ultra-low-ESR ceramic output capacitors. Its one-shot timer sets on-time inversely proportional to VIN and proportional to VOUT, maintaining quasi-fixed 650 kHz frequency across input and load variations.

It operates exclusively in continuous conduction mode (CCM), reducing light-load output ripple versus discontinuous mode. Protection includes non-latch OVP (125% × VFB), hiccup-mode UVP (65% × VFB), thermal shutdown at 155°C, and UVLO with 3.75 V threshold and 0.32 V hysteresis-enabling robust operation in compact, thermally constrained consumer power supplies.

Key Specifications

Pinout & Package

TPS562209DDCT uses a 6-pin SOT-23 (DDC) package, 1.6 mm × 2.9 mm body size, with exposed pad for thermal enhancement. Pin 1 is GND (top-left, marked dot), and pin numbering follows standard SOT-23 counterclockwise orientation.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar synchronous buck regulator applications.

Compared with TPS563209DDCT, the TPS562209DDCT offers optimized thermal performance at 2 A with identical footprint and feature set; versus MP2307DN-LF-Z, it delivers superior transient stability and reduced design effort despite slightly higher unit cost.

Availability

TPS562209DDCT is available at Aetrix Electronics and suitable for digital TV power supply, HD Blu-ray player, and networking home terminal applications requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for TPS562209DDCT 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 focused on analog, embedded processing, and connectivity technologies, serving industrial, automotive, and consumer markets with high-reliability silicon and comprehensive design resources.

The TPS56x209 product line delivers highly integrated, easy-to-use synchronous buck regulators targeting space-constrained consumer electronics where minimal external components, fast transient response, and robust protection are essential.

FAQ

What is the maximum recommended output current for TPS562209DDCT?

The TPS562209DDCT is rated for 2 A continuous output current under recommended operating conditions (T_J ≤ 150°C, proper PCB thermal design). Its integrated 122-mΩ high-side and 72-mΩ low-side MOSFETs enable this rating with typical efficiency >90% at 1.05 V/2 A. Exceeding 2 A may trigger cycle-by-cycle current limit or thermal shutdown depending on layout and ambient conditions. Always verify thermal performance in final application using the device's R_θJB = 13.4°C/W specification.

Does TPS562209DDCT support startup into a pre-biased output?

Yes, the TPS562209DDCT supports pre-biased soft-start. When the EN pin is asserted high and the VFB voltage is already above the internal reference (765 mV), the device delays switching until the internal soft-start ramp exceeds the present VFB level-preventing reverse current flow and ensuring monotonic output rise. This behavior is confirmed in Section 7.3.2 of the SLVSCM5A datasheet and is critical for systems with multiple power rails or hot-swap capability.

What capacitor value is required between VBST and SW pins for TPS562209DDCT?

A 0.1 µF ceramic capacitor is required between VBST (Pin 6) and SW (Pin 2) for proper high-side gate drive operation in the TPS562209DDCT. TI specifies X7R or better dielectric with 10 V or higher voltage rating. This capacitor must be placed as close as possible to the pins with short, low-inductance traces to maintain bootstrap charge integrity during high-frequency switching. Omitting or undersizing this capacitor causes high-side FET failure or erratic regulation.

Can TPS562209DDCT operate with only ceramic output capacitors?

Yes, the TPS562209DDCT is explicitly designed for ceramic-only output capacitor configurations thanks to its D-CAP2™ control architecture. Unlike traditional voltage-mode or current-mode controllers, D-CAP2™ eliminates the need for ESR-based compensation by embedding a synthetic ripple signal-making it stable with ultra-low-ESR multilayer ceramics (e.g., 22 µF ×2 X5R). This is validated across all typical characteristics plots in the datasheet (Figures D014–D015) and confirmed in Section 7.3.1.

What is the feedback voltage accuracy of TPS562209DDCT over temperature?

The TPS562209DDCT has a feedback voltage (VFB) accuracy of ±1% at 25°C, with total variation of ±5 mV (±0.65%) over the full –40°C to 125°C ambient range, as shown in Figure D003 and D012 of the datasheet. This translates to ±6.5 mV deviation at 765 mV nominal, supporting precise output regulation for sensitive SoC cores. The tight tolerance is achieved via on-die trimming and temperature-compensated bandgap reference.