XRP7725
Intel Node Manager Compatible Programmable
Power Management System
June 2018
Rev. 1.0.1
GENERAL DESCRIPTION
The XRP7725 is a quad channel Digital Pulse
Width Modulated (DPWM) Step down (buck)
controller. A wide 4.75V to 5.5V and 5.5V to
25V input voltage dual range allows for single
supply operation from standard power rails.
With integrated FET gate drivers, two LDOs for
standby power and a 105kHz to 1.23MHz
independent channel to channel programmable
constant operating frequency, the XRP7725
reduces overall component count and solution
footprint and optimizes conversion efficiencies.
A selectable digital Pulse Frequency Mode
(DPFM) and low operating current result in
better than 80% efficiency down to 10mA load
provides support for portable and Energy Star
compliant applications. Each XRP7725 output
channel is individually programmable down to
a minimum 0.6V with a resolution of 2.5mV,
and configurable for precise soft start and soft
stop sequencing, including delay and ramp
control.
The XRP7725 operation is fully controlled via
an SMBus-compliant I
2
C interface allowing for
advanced local and/or remote reconfiguration,
full performance monitoring and reporting as
well as fault handling.
Built-in independent output over voltage, over
temperature, over-current and under voltage
lockout protections insure safe operation
under abnormal operating conditions.
The XRP7725 is offered in a RoHS compliant,
“green”/halogen free 44-pin TQFN package.
FEATURES
•
Quad Channel Step-down Controller
−
Digital PWM 105kHz-1.23MHz Operation
−
Individual Channel Frequency Selection
−
Patented digital PFM with Ultrasonic mode
−
Patented Over Sampling Feedback
•
Instantaneous current monitoring –
Intel
®
Node Manager Compatible
•
4.75V to 25V Input Voltage
−
4.75V to 5.5V and 5.5V to 25V Input
Ranges
−
0.6V to 5.5V Output Voltage
•
SMBus Compliant - I
2
C Interface
−
Full Power Monitoring and Reporting
•
3 x 15V Capable PSIO + 2 x GPIOs
•
Full Start/Stop Sequencing Support
•
Built-in Thermal, Over-Current, UVLO
and Output Over-Voltage Protections
•
On Board 5V and 3.3V Standby LDOs
•
On Board Non-volatile Memory
•
Supported by PowerArchitect™ 5
APPLICATIONS
•
•
•
•
•
•
•
•
Blade Servers
Micro Servers
Network Adapter Cards
Base Stations
Switches/Routers
Broadcast Equipment
Industrial Control Systems
Automatic Test Equipment
TYPICAL APPLICATION DIAGRAM
XRP7725
Figure 1: XRP7725 Application Diagram
1/35
Rev. 1.0.1
Intel Node Manager Compatible Programmable Power
Management System
FEATURES AND BENEFITS
Programmable Power Benefits
•
Fully Configurable
−
Output set point
−
Feedback compensation
−
Frequency set point
−
Under voltage lock out
−
Input voltage measurement
−
Gate drive dead time
•
Reduced Development Time
−
Configurable and re-configurable for
different Vout, Iout, Cout, and Inductor
values
−
No need to change external passives for a
new output specification.
•
Higher integration and Reliability
−
Many external components used in the
past can be eliminated thereby
significantly improving reliability.
PowerArchitect™ 5.1 Design and
Configuration Software
−
Wizard quickly generates a base design
−
Calculates all configuration registers
−
Projects can be saved and/or recalled
−
GPIOs can be configured easily and
intuitively
−
Dashboard interface can be used for real-
time monitoring and debug
System Benefits
•
Intel Node Manager Compatible current
monitoring.
•
Ability to perform remote configuration
updates.
•
Ability to analyze operating history, perform
diagnostics and if required, take the supply
off-line after making other system
adjustments.
System Integration Capabilities
•
Single supply operation
•
I
2
C interface allows:
XRP7725
−
Intel Node Manager Compatible as well as
other Power Management systems
−
Modification or reading of internal
registers that control or monitor:
−
Output Current
−
Input and Output Voltage
−
Soft-Start/Soft-Stop Time
−
Power Good
−
Part Temperature
−
Enable/Disable Outputs
−
Over Current
−
Over Voltage
−
Temperature Faults
−
Adjusting fault limits and
disabling/enabling faults
−
Packet Error Checking (PEC) on I
2
C
communication
•
5 GPIO pins with a wide range of
configurability
−
Fault reporting (including UVLO
Warn/Fault, OCP Warn/Fault, OVP,
Temperature, Soft-Start in progress,
Power Good, System Reset)
−
Allows a Logic Level interface with other
non-digital IC’s or as logic inputs to other
devices
•
Frequency and Synchronization
Capability
−
Selectable switching frequency between
105kHz and 1.2MHz
−
Main oscillator clock and DPWM clock can
be synchronized to external sources
−
‘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
•
4 Independent SMPS channels and 2
LDOs in a 7x7mm TQFN
2/35
Rev. 1.0.1
XRP7725
Intel Node Manager Compatible Programmable Power
Management System
ABSOLUTE MAXIMUM RATINGS
These are stress ratings only and functional operation of
the device at these ratings or any other above those
indicated in the operation sections of the specifications
below is not implied. Exposure to absolute maximum
rating conditions for extended periods of time may affect
reliability.
VCCD, LDO5, LDO3_3, GLx, VOUTx ............. -0.3V to 7.0V
ENABLE, 5V_EXT ....................................... -0.3V to 7.0V
GPIO0/1, SCL, SDA ............................................... 6.0V
PSIOs Inputs, BFB .................................................. 18V
DVDD, AVDD ........................................................ 2.0V
V
CC
....................................................................... 28V
LX# ............................................................. -1V to 28V
BSTx, GHx .................................................... VLXx + 6V
Storage Temperature .............................. -65°C to 150°C
Junction Temperature .......................................... 150°C
Power Dissipation ................................ Internally Limited
Lead Temperature (Soldering, 10 sec) ................... 300°C
ESD Rating (HBM - Human Body Model) .................... 2kV
OPERATING RATINGS
Input Voltage Range V
CC
............................... 5.5V to 25V
Input Voltage Range V
CC
= LDO5 ................ 4.75V to 5.5V
VOUT1, 2, 3, 4 ...................................................... 5.5V
Junction Temperature Range ....................-40°C to 125°C
JEDEC Thermal Resistance θ
JA
..........................30.2°C/W
ELECTRICAL SPECIFICATIONS
Specifications with standard type are for an Operating Junction Temperature of T
J
= 25°C only; limits applying over the full
Operating Junction Temperature range are denoted by a “•”. Typical values represent the most likely parametric norm at T
J
= 25°C, and are provided for reference purposes only. Unless otherwise indicated, V
CC
= 5.5V to 25V, 5V EXT open.
Q
UIESCENT
C
URRENT
Parameter
V
CC
Supply Current in SHUTDOWN
ENABLE Turn On Threshold
ENABLE Pin Leakage Current
0.82
Min.
Typ.
10
Max.
20
0.95
10
-10
440
600
Units
µA
V
uA
uA
µA
Conditions
EN = 0V, V
CC
= 12V
V
CC
= 12V Enable Rising
EN=5V
EN=0V
LDO3_3 disabled, all channels disabled
V
CC
Supply Current in STANDBY
GPIOs programmed as inputs
V
CC
=12V,EN = 5V
V
CC
Supply Current 2ch PFM
3.1
mA
2 channels on and set at 5V, VOUT forced
to 5.1V, no load, non-switching, Ultra-
sonic off, V
CC
=12 V, No I
2
C activity.
4 channels on and set at 5V, VOUT forced
to 5.1V, no load, non-switching, Ultra-
sonic off, V
CC
=12V, No I
2
C activity.
All channels enabled, Fsw=600kHz, gate
drivers unloaded, No I
2
C activity.
V
CC
Supply Current 4ch PFM
V
CC
Supply Current ON
4.0
18
mA
mA
3/35
Rev. 1.0.1
XRP7725
Intel Node Manager Compatible Programmable Power
Management System
I
NPUT
V
OLTAGE
R
ANGE AND
U
NDERVOLTAGE
L
OCKOUT
Parameter
V
CC
Range
Min.
5.5
4.75
Typ.
Max.
25
5.5
Units
V
V
•
•
Conditions
With V
CC
connected to LDO5
V
OLTAGE
F
EEDBACK
A
CCURACY AND
O
UTPUT
V
OLTAGE
S
ET
P
OINT
R
ESOLUTION
Parameter
VOUT Regulation Accuracy
Low Output Range
0.6V to 1.6V
PWM Operation
VOUT Regulation Accuracy
Mid Output Range
0.6V to 3.2V
PWM Operation
VOUT Regulation Accuracy
High Output Range
0.6V to 5.5V
PWM Operation
VOUT Regulation Range
VOUT Native Set Point
Resolution
VOUT Fine Set Point Resolution
1
Min.
-5
-20
-7.5
-22.5
-15
-45
-20
-50
-30
-90
-40
-100
0.6
Typ.
Max.
5
20
7.5
22.5
15
45
20
50
30
90
40
100
5.5
Units
mV
mV
mV
mV
mV
mV
mV
mV
mV
mV
mV
mV
V
mV
•
•
•
•
•
•
•
Conditions
0.6 ≤ VOUT ≤ 1.6V
0.6 ≤ VOUT ≤ 1.6V
V
CC
=LDO5
0.6 ≤ VOUT ≤ 3.2V
0.6 ≤ VOUT ≤ 3.2V
V
CC
=LDO5
0.6 ≤ VOUT ≤ 5.5V
0.6 ≤ VOUT ≤ 4.2V
V
CC
=LDO5
Without external divider network
Low Range
Mid Range
High Range
Low Range
Mid Range
High Range
Low Range
Mid Range
High Range
Low Range
Mid Range
High Range
Low Range
Mid Range
High Range
Low Range
Mid Range
High Range
12.5
25
50
2.5
5
10
120
90
75
10
1
0.67
-155
-310
-620
-5
-10
-20
9
1
-0.5
0.5
157.5
315
630
5
10
20
16
mV
VOUT Input Resistance
VOUT Input Resistance in PFM
Operation
Power Good and OVP Set Point
Range (from set point)
Power Good and OVP Set Point
Accuracy
BFB Set Point Range
BFB Set Point Resolution
BFB Accuracy
kΩ
MΩ
mV
mV
V
V
V
Note 1: Fine Set Point Resolution not available in PFM
4/35
Rev. 1.0.1
XRP7725
Intel Node Manager Compatible Programmable Power
Management System
C
URRENT AND
AUX ADC (M
ONITORING
ADC
S
)
Parameter
Current Sense Accuracy
Current Sense ADC INL
DNL
Current Limit Set Point
Resolution and Current
Sense ADC Resolution
Current Sense ADC Range
VOUT ADC Resolution
VOUT ADC Accuracy
V
CC
ADC Range
UVLO WARN SET
UVLO WARN CLEAR
UVLO FAULT SET (Note 3)
V
CC
ADC Resolution
V
CC
ADC Accuracy
Die Temp ADC Resolution
Die Temp ADC Range
-44
-1
5
156
-1
4.6
4.4
4.4
4.2
200
1
-120
-280
15
30
60
1
25
4.72
4.72
4.55
Min.
-3.75
-10
-5
-12.5
Typ.
±1.25
±2.5
±0.4
0.27
1.25
2.5
20
40
mV
LSB
V
V
V
V
mV
LSB
°C
°C
Output value is in Kelvin
Vin <= 20V
Note 2
UVLO WARN set point 4.6V, V
CC
=LDO5
UVLO WARN set point 4.6V, V
CC
=LDO5
UVLO FAULT set point 4.4V, V
CC
=LDO5
mV
mV
mV
Low Range (≤120mV)
High Range (≤280mV)
Low Range (≤120mV)
High Range (≤280mV)
Low Range
Mid Range
High Range
Max.
3.75
10
5
+12.5
Units
mV
mV
mV
mV
LSB
•
•
Conditions
Low Range (≤120mV)
-60mV applied
High Range (≤280mV)
-150mV
Note 2: Although Range of V
CC
ADC is 0V to 25V, operation below 4.55 is not supported.
Note 3: This test ensures an UVLO FAULT flag will be given before the LDO5 hardware UVLO trips.
L
INEAR
R
EGULATORS
Parameter
LDO5 Output Voltage
LDO5 Current Limit
LDO5 UVLO
LDO5 PGOOD Hysteresis
LDO5 Bypass Switch Resistance
Bypass Switch Activation
Threshold
Bypass Switch Activation
Hysteresis
LDO3_3 Output Voltage
LDO3_3 Current Limit
Maximum total LDO loading
during ENABLE start-up
3.15
53
2.5
150
3.3
3.45
85
30
Min.
4.85
135
4.74
375
1.1
1.5
2.5
Typ.
5.0
155
Max.
5.15
180
Units
V
mA
V
mV
Ω
%
mV
V
mA
mA
•
•
•
V5EXT Rising, % of threshold setting
V5EXT Falling
4.6V ≤ LDO5 ≤ 5.5V
0mA < I
LDO3_3OUT
< 50mA
LDO3_3 Fault Set
ENABLE transition from logic low to
high. Once LDO5 in regulation above
limits apply.
•
•
•
Conditions
5.5V ≤ V
CC
≤ 25V
0mA < I
LDO5OUT
< 130mA, LDO3_3 Off
LDO5 Fault Set
V
CC
Rising
V
CC
Falling
5/35
Rev. 1.0.1
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