General Description

The RTQ2158A is a high-performance, Advanced

Constant On-Time (ACOT? ) monolithic synchronous

step-down DC-DC converter that can deliver up to peak

12A output current from a 2.85V to 6.5V input supply.

The device integrates low RDS(ON) power MOSFETs,

accurate 0.6V reference and an integrated diode of

bootstrap circuit to offer a very compact solution.

The RTQ2158A 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 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 RTQ2158A-QA is available

in a thermally enhanced WET-WQFN-21L 4x4 (FC)

package.

特性 Features

? AEC-Q100 Grade 1 Qualified

? Dramatically Fast Transient Response

? Steady 460kHz Switching Frequency

? Extremely High Efficiency 15m?/10m? 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

Applications

? Automotive Systems

? Infotainment and Cockpit Systems

? Vehicle ADAS ECU

? Connected Car Systems

? High Density DDR Memory

? Broadband Communications and Industrial Systems