Feature

• PMBus 1.3 Compliant

• Support Stackable up to 4 Phases

• Adaptive Constant-On-Time Control with Fast

Transient Response.

• Input Voltage Range: 2.97V to 16V with

External Bias, or 4.2V to 16V with Internal bias.

• Output Voltage Range: 0.4V to 0.9xVIN up to

5.5V Max

• 30A Continuous Output Current.

• Excellent Load and Line Regulations with 0.5%

Voltage Accuracy.

• Differential Remote Sensing

• Mode Selection Between Pulse Skip and CCM

at Light Load

• Programmable Soft-start Time

• Programmable Switch Valley Current Limit

• Selectable Switching Frequency: 400kHz,

600kHz, 800kHz and 1MHz

• OCP, NOCP, OVP, UVLO and OTP

• 4mm x 5mm, 25-Pin QFN Package

• RoHS compliant and Green

Applications

• Computing, Data Center and Servers

• Switches, Routers and Networking

• Base Station

• 12V Distribution Power Systems

Description

The RS53385 is a high-power density, fully

integrated synchronous buck converter with PMBus

interface. It has a wide input voltage range and can

support up to 30A continuous output current at

defined conditions. LDO is integrated internally,

which is very suitable for single input supply

conditions. External bias is optional for maximizing

efficiency. A differential remote sensing scheme and

an internal feedback reference voltage achieve

±1% tolerance over full temperature range and, in

conjunction, they perform an excellent good line and

load regulation.

Switching frequency can be configured from 400kHz,

600kHz, 800kHz, to 1MHz. The RS53385 uses

Constant-On-Time control algorithm with fast

transient response. Pure MLCC output capacitors

can be used to save space and cost.

RS53385 has full protection features including OCP,

NOCP, OVP, UVP and over temperature protection

(OTP).

The RS53385 is available in a 4mm x 5mm 25-Pin

QFN package