General Description

RT6575K is a single-channel step-down controller

generating supply voltage for battery-powered systems.

It includes a Pulse-Width Modulation (PWM) controller

adjustable from 2V to 5.5V, and a fixed 5V linear

regulator. The linear regulator provides up to 100mA

output current. Other features include on-board powerup sequencing, a power-good output, internal soft-start,

and soft-discharge output that prevents negative

voltage during shutdown.

A constant current ripple PWM control scheme operates

without sense resistors and provides 100ns response to

load transient. For maximizing power efficiency, the

RT6575K automatically switches to the diode-emulation

mode in light load applications. The RT6575K is

available in the VQFN-16L 3x3 package.

Features

⚫ CCRCOT Control with 100ns Load Step Response

⚫ PWM Maximum Duty Ratio > 98%

⚫ 5V to 25V Input Voltage Range

⚫ 2V to 5.5V Output Voltage Range

⚫ 5V LDO with 100mA Output Current

⚫ Two Selectable Frequency Settings

⚫ Internal Soft-Start and Soft-Discharge

⚫ 4700ppm/°C RDS(ON) Current Sensing

⚫ Independent Switcher Enable Control

⚫ Built-in OVP/UVP/OCP/OTP

⚫ Non-Latch UVLO

⚫ Power Good Indicator

⚫ RoHS Compliant and Halogen Free

Applications

⚫ Notebook and Sub-Notebook Computers

⚫ System Power Supplies