General Description
The RTQ2159 is a high-performance, synchronous
step-down DC-DC converter that can deliver up to 8A
output current from a 2.85V to 6.5V input supply. The
output voltage can be programmed from 0.6V to 1.5V
with I2C controlled 7-Bits VID.
The device integrates low RDS(ON) power MOSFETs,
accurate reference voltage and an integrated diode of
bootstrap circuit to offer a very compact solution.
The RTQ2159 adopts Advanced Constant On-Time
(ACOT® ) control architecture that provides ultrafast
transient response and further reduces the
external-component count. In steady states, the
ACOT® operates in nearly constant switching
frequency over line, load and output voltage ranges
and makes the EMI filter design easier. The RTQ2159
operations in Forced-CCM that helps meet tight voltage
regulation accuracy requirements.
The device offers independent enable control input pin
and power good indicator for easily sequence control.
To control the inrush current during the startup, the
device provides a programmable soft-start up by an
external capacitor connected to the SS pin. Fully
protection features are also integrated in the device
including the cycle-by-cycle current limit control, UVP,
input UVLO and OTP. The RTQ2159 is available in a
thermally enhanced WET-WQFN-21L 4x4 (FC)
package.

Features
 AEC-Q100 Grade 1 Qualified
 Dramatically Fast Transient Response
 Selectable Switching Frequency (0.46MHz /
0.69MHz / 0.92MHz / 2.1MHz)
 Extremely High Efficiency 15mΩ/10mΩ MOSFETs
 Advanced COT Control Loop
 Wide Input Voltage Range from 2.85V to 6.5V
 Optimized for Ceramic Output Capacitors
 Internal Start-Up into Pre-biased Outputs
 Power Good Indicator
 Enable Control
 Over-Current and Over-Temperature Protections
 Under-Voltage Protection with Hiccup Mode
 VID Control Range Via I2C Compatible Interface :
0.6V to 1.5V step = 10mV

Applications
 Automotive Systems
 Infotainment and Cockpit Systems
 Vehicle ADAS ECU
 Connected Car Systems
 High Density DDR Memory
 Broadband Communications and Industrial
Systems