1 Features
• AEC-Q100 qualified for automotive applications
– Device temperature grade 1:
–40°C to +125°C TA
• Functional Safety-Capable
– Documentation available to aid functional safety
system design
• Input voltage range: 2.75 V to 6 V
• Family of 1 A, 2 A, 3 A and 4 A
• Quiescent current 15-μA typical
• Output voltage from 0.6 V to 5.5 V
• Output voltage accuracy ±1% (PWM operation)
• Adjustable soft start
• Forced PWM or PWM and PFM operation
• Adjustable switching frequency of
1.8 MHz to 4 MHz
• Precise ENABLE input allows
– User-defined undervoltage lockout
– Exact sequencing
• 100% duty cycle mode
• Active output discharge
• Spread spectrum clocking - 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. The TPS6281x-
Q1 is designed 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 same frequency 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 forming tracking of the
output voltage to an external source. This feature
allows external sequencing of different supply rails
and limiting the inrush current during start-up.
The TPS6281x-Q1 is available in a 3-mm × 2-mm
VQFN package with wettable flanks.