NCP5393 ON Semiconductor, NCP5393 Datasheet - Page 13

• Manufacturer Part Number: NCP5393
• Description: 2/3/4-Phase Controller
• Manufacturer: ON Semiconductor

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Functional Description
General
compatible with both Parallel (PVI) and Serial (SVI)
protocols for AMD Processors. The device provides
complete
high-performance step-down DC-DC voltage regulator,
optimized for advanced microprocessor power supply
supporting both PVI and SVI communication. It embeds two
independent controllers for CPU CORE and the integrated
NB, each one with its set of protections. The Controller
performs a single-phase control for the NB Section and a
programmable 2- to-4 phase control for the CORE Section
featuring Dual-Edge multiphase architecture.
this particular configuration the SVI bus is used as a static
bus configuring 4 operative voltages for both the sections
and ignoring any serial-VID command. It can be used for
the board debug before plugging-in the CPU.
differential phase current sensing, optional load-line
voltage positioning, and programmable V
offsets to provide accurately regulated power parallel- and
serial-VID AMD processors. Dual-edge multiphase
modulation provides the fastest initial response to dynamic
load events.
in order to configure itself to work as a Single-Plane PVI
controller or Dual-Plane SVI controller. The NCP5393
manages On the Fly VID transitions and maintains the slew
rates as defined when the transitions take place. NCP5393
is available in TQFN48 Package.
Remote Output Sensing Amplifier (RSA)
V
reference point by connecting the V
core
NCP5393 is an universal CPU Power Supply Controller
NCP5393 also supports V_FIX mode for board debug: in
The NCP5393 incorporates differential voltage sensing,
NCP5393 is able to detect which kind of CPU is connected
A true differential amplifier allows the NCP5393 to measure
9.5
9.0
8.5
8.0
7.5
7.0
10
voltage feedback with respect to the V
0
Figure 7. 12VMON Undervoltage Lockout
control
Threshold Voltage vs. Temperature
T
J
V
V
, JUNCTION TEMPERATURE (°C)
CC
CC
logic
Decreasing Voltage
Increasing Voltage
25
and
core
reference point to VSP,
protections
50
DD
TYPICAL CHARACTERISTICS
and V
core
for
ground
http://onsemi.com
DDNB
NCP5393
a
75
13
and the V
configuration keeps ground potential differences between the
local controller ground and the V
from affecting regulation of V
ground reference points. The RSA also subtracts the DAC
(minus VID offset) voltage, thereby producing an unamplified
output error voltage at the DIFFOUT pin. This output also has
a 1.3 V bias voltage as the floating ground to allow both
positive and negative error voltages.
Precision Programmable DAC
trimmed. This DAC has 0.5% accuracy over the entire
operating temperature range of the part. The DAC can be
programmed to support both PVI and SVI VID code
specifications.
High Performance Voltage Error Amplifier
and bandwidth. Although not required when operating as the
controller of a voltage regulator, a capacitor from COMP to
VFB is required for stable unity gain test configurations.
Gate Driver Outputs and 2/3/4 Phase Operation
mode. In 2-phase mode, phases 1 and 3 should be used to
drive the external gate drivers, G2 and G4 must be grounded.
In 3-phase mode, gate output G4 must be grounded. In
4-phase mode all 4 gate outputs are used as shown in the
4-phase Applications Schematic. The Current Sense inputs
of unused channels should be connected to GND. Please
refer to table “PIN CONNECTIONS vs. PHASE COUNTS”
for details.
370
360
350
340
330
320
310
A precision programmable DAC is provided and system
The error amplifier is designed to provide high slew rate
The part can be configured to run in 2-, 3-, or 4-phase
0
Figure 8. PWRGOOD Voltage vs. Temperature
PWRGOOD Upper Voltage
PWRGOOD Lower Voltage
core
T
J
, JUNCTION TEMPERATURE (°C)
ground reference point to VSN. This
25
core
core
between V
ground reference point
50
core
and V
core
75