TPS54336ADDAR

The TPS5433xA family are synchronous converters with an input voltage range of 4.5V to 28V. These devices integrate a low-side switch FET, eliminating the need for an external diode and reducing component count. Efficiency is significantly improved through integrated 128mΩ and 84mΩ MOSFETs, low IQ, and pulse-skip mode at light load. The shutdown supply current can be reduced to 2μA via the enable pin. The reference voltage of this buck converter maintains 1.5% accuracy over the full temperature range, providing precise voltage regulation for various loads. Cycle-by-cycle current limiting on the high-side FET protects the TPS5433xA family under overload conditions, with enhanced functionality achieved through low-side power current limiting to prevent current runaway. The low-side sink current limit turns off the low-side MOSFET to prevent excessive reverse current. Hiccup protection is triggered when an overcurrent condition persists beyond a preset time. Thermal shutdown disables the device when the die temperature exceeds the threshold, and re-enables it after a built-in thermal hiccup interval.

Applications

• Consumer applications such as Digital Television (DTV)
• Set-Top Box (STB)
• DVD/Blu-ray players
• LCD monitors
• Customer Premises Equipment (CPE) (cable modems, WiFi routers)
• Digital Light Processing (DLP) projectors
• Smart meters

Key features

• Synchronous 128mΩ and 84mΩ MOSFETs for 3A continuous output current
• TPS54335A: Internal 2ms soft-start, adjustable frequency 50kHz to 1.5MHz
• TPS54336A: Adjustable soft-start, 340kHz fixed frequency
• Quiescent current as low as 2μA during shutdown
• 0.8V reference voltage with ±0.8% accuracy
• Current mode control
• Monotonic startup for pre-biased output
• Pulse skip mode for improved light-load efficiency
• Hiccup mode overcurrent protection
• Thermal shutdown (TSD) and overvoltage transition protection
• 8-pin SO PowerPAD and 10-pin VSON packages