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