General Description
The RTQ2106 is a 3A, high-efficiency, current mode
synchronous step-down converter which is optimized for
automotive applications. The device operates with input
voltages from 3V to 36V and is protected from load dump
transients up to 42V, eases input surge protection design.
The device can program the output voltage between 0.8V
to VIN. The low quiescent current design with the integrated
low RDS(ON) power MOSFETs achieves high efficiency over
the wide load range. The peak current mode control with
simple external compensation allows the use of small
inductors and results in fast transient response and good
loop stability.
The ultra-low minimum on-time enable constant-frequency
operation even at very high step down ratios. For switching
noise sensitive applications, it can be externally
synchronized from 300kHz to 2200kHz. The build-in
spread-spectrum frequency modulation further helping
systems designers with better EMC management.
The RTQ2106 provides complete protection functions such
as input under voltage lockout, output under voltage
protection, over current protection, and thermal shutdown.
Cycle-by-cycle current limit provides protection against
shorted outputs and soft-start eliminates input current
surge during start-up. The RTQ2106 is available in
TSSOP-14 (Exposed Pad) package.

Features
 AEC-Q100 Grade 1 Qualified
 Wide Input Voltage Range
 4V to 36V
 3V to 36V (Soft-start is finished)
 Wide Output Voltage Range : 0.8V to VIN
 Maximum Output Current : 3A
 Peak Current Mode Control
 Integrated 90mΩ Switch and 90mΩ Synchronous
Rectifier
 Low Quiescent Current : 40μA
 Fast 60ns Minimum Switch On-Time
 Ultra-Short 65ns Minimum Switch Off-Time
 Synchronizable Switching : 300kHz to 2.2MHz
 Selectable PSM/FPWM at Light Load
 Built-In Spread-Spectrum Frequency Modulation for
Low EMI
 Externally Adjustable Soft-Start
 Power Good Indication
 Enable Control
 0.8V ±1.5% Reference Accuracy
 Adjustable Current Limit
 Adjacent Pin-Short Protection
 Built-In UVLO, UVP, OTP

Applications
 Automotive Systems
 Car Camera Module and Car Cockpit Systems
 Connected Car Systems
 Point of Load Regulator in Distributed Power Systems
 Digital Set Top Boxes
 Broadband Communications