Text preview for : RT9248.PDF part of Various RT9248 . Electronic Components Datasheets Various RT9248.PDF
Back to : RT9248.PDF | Home
Preliminary RT9248
Multi-Phase PWM Controller for CPU Core Power Supply
General Description Features
The RT9248 is a multi-phase buck DC/DC controller Multi-Phase Power Conversion with Automatic
integrated with all control functions for GHz CPU VRM. Phase Selection
The RT9248 controls 2 or 3 buck switching stages operating VRM9 & VRD10 DAC Output with Active Droop
in interleaved phase set automatically. The multi-phase Compensation for Fast Load Transient
architecture provides high output current while maintaining Smooth VCORE Transition at VID Jump
low power dissipation on power devices and low stress on Multi-Level VID125 Input for VRM9 & VRD10
input and output capacitors. The high equivalent operating Selection
frequency also reduces the component dimension and the Power Stage Thermal Balance by RDS(ON) Current
output voltage ripple in load transient. Sense
Hiccup Mode Over-Current Protection
RT9248 controls both voltage and current loops to achieve
Programmable Switching Frequency (50kHz to
good regulation, response & power stage thermal balance.
400kHz per Phase), Under-Voltage Lockout and
Precise current loop using RDS(ON) as sense component
Soft-Start
builds precise load line for strict VRM DC & transient
High Ripple Frequency Times Channel Number
specification and also ensures thermal balance of different
RoHS Compliant and 100% Lead (Pb)-Free
power stages. The settings of current sense, droop tuning,
VCORE initial offset and over current protection are
independent to compensation circuit of voltage loop. The
Applications
feature greatly facilitates the flexibility of CPU power supply Intel