Texas Instruments TPS562219ADDFT

Overview

TPS562219ADDFT from Texas Instruments is a 2-A synchronous step-down DC-DC converter in an 8-pin SOT-23 (DDF) package, featuring D-CAP2™ control mode, 650-kHz fixed switching frequency, 4.5 V to 17 V input range, and 0.76 V to 7 V adjustable output voltage. It integrates 133-mΩ high-side and 80-mΩ low-side MOSFETs, supports pre-biased startup, and delivers power-good signaling for digital TV and STB point-of-load regulation.

For engineers reviewing the TPS562219ADDFT datasheet, TPS562219ADDFT pinout, TPS562219ADDFT application, or TPS562219ADDFT equivalent, key selection criteria include its 2-A continuous output capability, 1% VFB accuracy at 25°C, <10 µA shutdown current, and compatibility with ceramic/polymer output capacitors without external compensation.

Technical Context

The TPS562219ADDFT employs adaptive on-time D-CAP2™ control, combining internal ramp generation with feedback voltage comparison to achieve fast transient response and stability with ultra-low-ESR capacitors. Its one-shot timer sets on-time proportional to VIN and inversely proportional to VOUT, enabling quasi-fixed 650-kHz operation across input and load variations.

It operates exclusively in continuous conduction mode (CCM), reducing light-load ripple versus discontinuous mode. Protection includes cycle-by-cycle overcurrent limiting via valley-current sensing, hiccup-mode under-voltage protection, non-latch OVP/UVLO, and thermal shutdown at 155°C with 35°C hysteresis.

Key Specifications

Pinout & Package

TPS562219ADDFT is housed in an 8-pin SOT-23 (DDF) package measuring 1.60 mm × 2.90 mm, optimized for high-density PCB layouts and thermal performance with R_θJA = 106.1°C/W.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS562219ADDFT, TPS563219ADDFT offers higher current capacity with identical footprint and feature set, while MP2315DJ-LF-Z trades integration for lower BOM cost but adds design complexity and reduces system-level reliability features.

Availability

TPS562219ADDFT is available at Aetrix Electronics and suitable for digital TV power supply, HD Blu-ray player, and digital set-top box applications requiring stable component supply, long-term lifecycle support, and consistent parametric performance.

Supply support for TPS562219ADDFT 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 TPS56x219A product line was designed specifically for space-constrained, cost-sensitive consumer electronics requiring simple, efficient, and highly integrated point-of-load DC-DC solutions with minimal external components.

FAQ

What is the maximum recommended output current for TPS562219ADDFT?

The TPS562219ADDFT is rated for 2 A continuous output current under recommended operating conditions (T_A = –40°C to 85°C, proper layout and thermal management). Its current limit threshold is 2.5–4.3 A depending on operating conditions, but sustained operation above 2 A may exceed thermal limits in the SOT-23 (DDF) package. Always verify junction temperature using R_θJA = 106.1°C/W and ambient conditions in your design before TPS562219ADDFT deployment.

Does TPS562219ADDFT support pre-biased output startup?

Yes, TPS562219ADDFT supports pre-biased output startup. When the output capacitor is pre-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's Feature Description section 7.3.2 and is intrinsic to the TPS562219ADDFT's control architecture - no external circuitry is required to enable this function.

What is the purpose of the VBST pin on TPS562219ADDFT?

VBST on TPS562219ADDFT supplies the bootstrap voltage for the high-side MOSFET gate driver. It must be connected to SW through a 0.1 µF ceramic capacitor to generate the ~5.5 V gate drive voltage needed to fully enhance the high-side FET. Failure to implement this capacitor results in insufficient high-side drive, increased conduction loss, and potential device malfunction. This requirement is mandatory for all operating conditions of TPS562219ADDFT.

Can TPS562219ADDFT operate with ceramic output capacitors only?

Yes, TPS562219ADDFT is explicitly designed for use with low-ESR ceramic output capacitors - including multi-layer ceramics - thanks to its D-CAP2™ control architecture. The internal compensation and ramp injection eliminate the need for ESR-based loop stabilization. Recommended total output capacitance is 20–68 µF, and typical designs use two parallel 22 µF X5R/X7R MLCCs with ≤2 mΩ ESR each, as validated in the TPS562219ADDFT reference design.

What protections are built into TPS562219ADDFT?

TPS562219ADDFT integrates cycle-by-cycle overcurrent limiting, hiccup-mode output undervoltage protection (UVP), non-latch overvoltage protection (OVP), non-latch UVLO, and thermal shutdown at 155°C with 35°C hysteresis. All protections are hardware-based and require no configuration. The OVP triggers at 125% of VFB threshold (e.g., ~0.956 V for 1.05 V output), and UVP activates at 65% of VFB threshold, both verified in Electrical Characteristics Table 6.5 of the official datasheet for TPS562219ADDFT.