XRP7724
Quad Channel Digital PWM/PFM
Programmable Power Management System
System Integration Capabilities
Single supply operation
I2C interface allows:
FEATURES AND BENEFITS
Programmable Power Benefits
Fully Configurable
Output set point
Communication with a System Controller
or other Power Management devices for
optimized system function
Feedback compensation
Frequency set point
Under voltage lock out
Input voltage measurement
Gate drive dead time
Access to modify or read internal
registers that control or monitor:
Output Current
Input and Output Voltage
Soft-Start/Soft-Stop Time
‘Power Good’
Reduced Development Time
Configurable and re-configurable for
different Vout, Iout, Cout, and Inductor
values
Part Temperature
Enable/Disable Outputs
Over Current
No need to change external passives for a
new output specification.
Over Voltage
Higher integration and Reliability
Temperature Faults
Many external circuits used in the past
can be eliminated significantly improving
reliability.
Adjusting fault limits and
disabling/enabling faults
Packet Error Checking (PEC) on I2C
communication
PowerArchitect™ 5.0 Design and
5 GPIO pins with a wide range of
Configuration Software
configurability
Wizard quickly generates a base design
Calculates all configuration registers
Projects can be saved and/or recalled
Fault reporting (including UVLO
Warn/Fault, OCP Warn/Fault, OVP,
Temperature, Soft-Start in progress,
Power Good, System Reset)
GPIOs can be configured easily and
intuitively
Allows a Logic Level interface with other
non-digital IC’s or as logic inputs to other
devices
“Dashboard” Interface can be used for
real-time monitoring and debug
Frequency and Synchronization
System Benefits
Capability
Reliability is enhanced via communication
with the system controller which can obtain
real time data on an output voltage, input
voltage and current.
Selectable switching frequency between
105kHz and 1.2MHz
Main oscillator clock and DPWM clock can
be synchronized to external sources
System processors can communicate with
the XRP7724 directly to obtain data or
make adjustments to react to circuit
conditions
‘Master’, ‘Slave’ and ‘Stand-alone’
Configurations are possible
Internal MOSFET Drivers
Internal FET drivers (4Ω/2Ω) per channel
Built-In Automatic Dead-time adjustment
30ns Rise and Fall times
A system process or could also be
configured to log and analyze operating
history, perform diagnostics and if required,
take the supply off-line after making other
system adjustments.
4 Independent SMPS channels and 2
LDOs in a 7x7mm TQFN
© 2012 Exar Corporation
12/29
Rev. 1.0.1
EXAR [ EXAR CORPORATION ]
