Texas Instruments TPS563209DDCT

Overview

TPS563209 from Texas Instruments is a 3-A synchronous step-down DC/DC converter in a 6-pin SOT-23 (DDC) package, featuring integrated 68-mΩ high-side and 39-mΩ low-side MOSFETs, D-CAP2™ control for fast transient response, 4.5 V to 17 V input range, and 0.76 V to 7 V adjustable output voltage. It delivers stable power to core logic rails in compact consumer electronics.

For engineers reviewing the TPS563209 datasheet, TPS563209 pinout, TPS563209 application, or TPS563209 equivalent, this page provides verified electrical parameters, validated pin functions, confirmed thermal and protection behavior, and real-world implementation context - all specific to the TPS563209 variant, not the 2-A TPS562209 sibling.

Technical Context

The TPS563209 employs adaptive on-time D-CAP2™ control with internal ramp compensation, enabling stable operation with ultra-low-ESR ceramic or polymer output capacitors without external compensation. Its fixed 650 kHz switching frequency and forced continuous conduction mode (CCM) minimize light-load output ripple.

Protection architecture includes cycle-by-cycle over-current limiting with hiccup-mode under-voltage recovery, non-latch OVP at 125% V_FB, UVLO with 3.75 V threshold and 0.32 V hysteresis, and thermal shutdown at 155°C. Startup supports pre-biased outputs via internal soft-start timing of 1.0 ms.

Key Specifications

Pinout & Package

TPS563209 uses a 6-pin SOT-23 (DDC) package measuring 1.6 mm × 2.9 mm, optimized for high-density layouts and thermally enhanced PCB mounting. The exposed pad is electrically connected to GND and must be soldered to a thermal pad for reliable power dissipation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS562209, the TPS563209 delivers 50% higher output current with lower FET losses, while MP2332HGTL-Z offers extended input range but sacrifices key protections and ease-of-use features - making TPS563209 optimal for space-constrained 3-A applications requiring robust, plug-and-play integration.

Availability

TPS563209 is available at Aetrix Electronics and suitable for digital TV power supplies, HD Blu-ray player designs, and networking home terminals requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for TPS563209 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-reliability power conversion ICs.

The TPS56x209 product line delivers highly integrated, easy-to-use synchronous buck regulators targeting compact consumer and computing applications where minimal external components, fast transient response, and thermal robustness are critical.

FAQ

What is the maximum continuous output current supported by the TPS563209?

The TPS563209 is rated for 3 A continuous output current under recommended operating conditions (T_J ≤ 150°C, adequate PCB copper). This rating is validated with the integrated 68-mΩ high-side and 39-mΩ low-side MOSFETs and assumes proper thermal layout per TI's DDC package guidelines. Derating applies above 85°C ambient.

Does the TPS563209 support startup into a pre-biased output voltage?

Yes, the TPS563209 supports pre-biased soft-start: when the output capacitor is already charged, the device delays switching until the internal reference voltage exceeds the feedback voltage (VFB), preventing reverse current flow and ensuring controlled ramp-up. This behavior is confirmed in the datasheet Section 7.3.2.

What is the purpose of the VBST pin on the TPS563209?

The VBST pin on the TPS563209 supplies the bootstrap voltage for the high-side MOSFET gate driver. A 0.1 µF ceramic capacitor must be placed between VBST and SW to generate the required ~5.5 V gate drive above SW potential. Omitting or misplacing this capacitor causes high-side FET failure and regulator malfunction.

How does the TPS563209 handle over-current conditions?

The TPS563209 implements cycle-by-cycle valley-current limiting. If sensed current exceeds the OCL threshold (~3.2 A typical), the low-side FET remains on to clamp current, and the OCL threshold is reduced in subsequent cycles until fault clears. Persistent overload triggers hiccup-mode UVP shutdown after 14 µs delay.

Can the TPS563209 operate with ceramic output capacitors only?

Yes - the D-CAP2™ control architecture of the TPS563209 is explicitly designed for stability with ultra-low-ESR ceramic capacitors (e.g., X5R/X7R MLCCs), eliminating the need for electrolytic or polymer caps. TI recommends 20–68 µF total ceramic capacitance, as validated in Application Note SLVSCM5A.