TPS62811QWRWYRQ1

1 Features

· AEC-Q100 qualified for automotive applications

  -Device temperature grade 1:

    -40°℃ to+125℃TA

· Input voltage range:2.75Vto 6V

· Family of 1A,2A,3A and4A

· Quiescent current 15-uA typical

· Output voltage from 0.6V to 5.5V

· Output voltage accuracy ±1%(PWM operation)

· Adjustable soft-start

· Forced PWM or PWM and PFM operation

· Adjustable switching frequency of 1.8MHz to 4MHz

· Precise ENABLE input allows

  -User-defined undervoltage lockout

  -Exact sequencing

· 100% duty cycle mode

· Active output discharge

· Spread spectrum clocking-optional

· Fold-back overcurrent protection-optional

· Power good output with window comparator

· Package with wettable flanks

2 Applications

· Infotainment head unit

· Hybrid and reconfigurable cluster

· Telematics control unit

· Surround view ECU

· ADAS sensor fusion

· External amplifier

3 Description 

The TPS6281x-Q1 is family of pin-to-pin 1-A,2-A,3-A and 4-A synchronous step-down DC/DC converters. All devices offer high efficiency and ease of use. The TPS6281x-Q1 family is based on a peak current mode control topology. TPS6281x-Q1 isdesigned for automotive applications such as Infotainment and advanced driver assistance systems. Low resistive switches allow up to 4-A continuous output current at high ambient temperature. The switching frequency is externally adjustable from 1.8 MHz to 4 MHz and can also be synchronized to an external clock in the samefrequency range. In PWM/PFM mode, the TPS6281x-Q1 automatically enter Power Save Mode at light loads to maintain high efficiency across the whole load range. The TPS6281x-Q1 provide 1% output voltage accuracy in PWM mode which helps design a power supply with high output voltage accuracy. The SS/TR pin allows setting the start-up time or formingtracking of the output voltage to an external source. This allows external sequencing of different supply rails and limiting the inrush current during start-up.

The TPS6281x-Q1 is available in a 3-mm x 2-mm VQFN package with wettable flanks.

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