explain

Tps54202 is a 2A synchronous step-down converter with an input voltage range of 4.5V to 28V. The device includes two integrated switching field effect transistors (FETs) and has the functions of internal loop compensation and 5ms internal soft start, which can reduce the number of components.

By integrating MOSFET and using SOT-23 package, tps54202 obtains high power density and occupies a large proportion on printed circuit board (PCB)

Very small space. Advanced eco mode implementation maximizes light load efficiency and reduces power loss. The introduction of spread spectrum operation can improve EMI performance.

The cycle by cycle current limiting function on the high side MOSFET protects the converter under overload conditions and is enhanced by the freewheeling current limiting function of the low side MOSFET to prevent current runaway. When the overcurrent duration exceeds the preset time, the hiccup mode protection function will be triggered.

characteristic

• wide input voltage range from 4.5V to 28V

• integrated 148m Ω and 78m Ω MOSFET with continuous output current of 2A

• the off current is as low as 2 µ A and the quiescent current is 45 μ A

• internal 5ms soft start

• 500KHz fixed switching frequency

• spread spectrum reduces EMI

• advanced eco mode ™ Pulse jump

• peak current mode control

• internal loop compensation

• provide overcurrent protection for both MOSFETs through intermittent mode protection

• overvoltage protection

• thermal shutdown

• SOT-23 (6) package

application

• 12V, 24V distributed bus power supply

• industrial applications

– white goods

• consumer applications

– audio

– STB, DTV

– printer