TPS564201DDCR 4.5V-17V Input 4A Synchronous Step-Down Converter IC TSOT-23-6

TPS564201DDCR Product Overview

When designing power supplies for digital TVs, set-top boxes, or networking home terminals, designers typically focus on three things: whether it can deliver a stable 4A output across a wide input voltage range, whether transient response meets the demands of fast load changes, and whether the external component count is low enough to save PCB area. The Texas Instruments TPS564201DDCR is a high-efficiency synchronous step-down converter built for exactly that requirement.

The device employs an adaptive on-time D-CAP2™ mode control architecture, achieving fast transient response without external compensation components while supporting low-ESR output capacitors such as POSCAP, SP-CAP, and ultra-low ESR ceramic types. It integrates 50mΩ high-side and 22mΩ low-side MOSFETs, supports a 4.5V to 17V wide input voltage range, provides an adjustable output voltage from 0.76V to 7V, and delivers up to 4A continuous output current. The switching frequency is fixed at 560kHz with 1.6% feedback voltage accuracy at 25°C.

The TPS564201DDCR automatically enters pulse skip mode at light loads, reducing switching losses while maintaining high conversion efficiency. Shutdown current is less than 5µA, suitable for applications with strict standby power requirements. Protections include cycle-by-cycle overcurrent limit, hiccup-mode overcurrent protection, non-latch undervoltage protection (UVP), and thermal shutdown (TSD), with support for startup from pre-biased output voltage. It comes in a 6-pin 1.6mm × 2.9mm TSOT-23-6 package rated for -40°C to +125°C junction temperature.

TPS564201DDCR Typical Applications

Digital TV (DTV) power supply

High-definition Blu-ray™ disc players

Networking home terminals

Digital set-top boxes (STB)

Surveillance equipment power

Point-of-Load (POL) power for 4A low-voltage loads

FAQs:

Q: What is the advantage of the D-CAP2 control mode?
A: D-CAP2™ is a proprietary adaptive on-time control architecture that achieves fast transient response without external compensation components. The control circuit is optimized for low-ESR output capacitors (POSCAP, SP-CAP, and ceramic types), significantly simplifying power supply design and reducing external component count.

Q: How is light-load efficiency?
A: The TPS564201DDCR automatically enters pulse skip mode at light loads, reducing switching losses to maintain high conversion efficiency. Shutdown current is below 5µA, suitable for standby-power-sensitive applications.

Q: How does overcurrent protection work?
A: The device integrates cycle-by-cycle overcurrent limit and hiccup-mode overcurrent protection. Cycle-by-cycle limiting immediately restricts switch current; hiccup-mode protection shuts down the converter during prolonged overload and automatically restarts after the fault clears.

Q: What is the difference between TPS564201DDCR and TPS564208DDCR?
A: Both share core specifications (4.5V-17V input, 4A output, 560kHz, TSOT-23-6). The primary difference is light-load behavior: the TPS564201 uses pulse skip mode (Eco-mode) for higher light-load efficiency; the TPS564208 uses forced PWM mode for constant switching frequency, suitable for applications with strict ripple and EMI requirements.

Q: Does it require external compensation?
A: No. D-CAP2 mode control requires no external compensation components — only appropriate inductor, capacitors, and feedback resistors.

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