Analog Devices EVAL-LT7171-1-AZ User Manual

LT7171-1 16V PolyPhase Silent Switcher Step-Down Regulator with Digital Power
General Description
Evaluation kit EVAL-LT7171-1-AZ has two dual-phase
monolithic DC/DC synchronous step-down regulators with
a 2.9V to 16V input range featuring
can supply up to 40A continuous load current. The Silent
®
Switcher structure is incorporated into the LT7171-1 to
minimize EMI and reduce PCB layout sensitivity. It also
integrates digital power system management functionality,
allowing for programmability and telemetry with a
PMBus/I2C compliant serial interface. Refer to the
LT7171-1 data sheet for more detailed information.
The EVAL-LT7171-1-AZ evaluation board is designed for
1.0V output with a switching frequency set at 1MHz. The
controlled on-time valley current-mode control with 25ns
typical minimum on-time enables a high switching
frequency at a low output voltage with excellent transient
response in a small overall solution size.
The EVAL-LT7171-1-AZ powers up to default settings and
produces power based on the NVM configuration without
the need for any serial bus communication. This allows
easy evaluation of the DC/DC converter. To fully explore
the power system management features of the part,
Performance Summary
PARAMETER
Input Voltage Range
Default Output Voltage
Maximum Continuous
Output Current
Switching Frequency
Efficiency
* The minimum V is limited by the U7 (LTC4413) that provides the RUN and V
IN
minimum V of 1.5V with a separate 3V ≤ EXTV
IN
Rev. A
O n e A n a l o g W a y , W i l m i n g t o n , M A 0 1 8 8 7 - 2 3 5 6 , U . S . A .
®
LT 7171-1. The output
Specifications are at T
SYMBOL CONDITIONS
V
IN
V
OUT
Two ICs, Four Phases
I
OUT
f
SW
V = 12V, I
Eff
IN
CC
EVAL-LT7171-1-AZ
download the GUI software LTpowerPlay
and use ADI's I
connect to the board. LTpowerPlay allows the user to
reconfigure the part on the fly, and store the configuration
in NVM, view telemetry of voltage, current, temperature,
and fault status. The NVM can be programmed up to three
times.
The EVAL-LT7171-1-AZ reserves two locations for
evaluations, up to a total of four LT7171-1 IC parallel
operations. For a detailed parallel configuration, refer to
the LT7171-1 data sheet.
GUI Download
The software can be downloaded from LTpowerPlay.
The LT7171-1 data sheet gives a complete description of
the part, operation, and application information. The data
sheet must be read in conjunction with this demo manual
for EVAL-LT7171-1-AZ.
For more details and instructions of the LTpowerPlay, refer
to LTpowerPlay GUI for the LT7171-1 Quick Start Guide.
= 25°C
A
MIN
2.9*
0.925
= 20A
OUT
≤ 5.5V. For details, refer to the LT7171-1 data sheet.
DOCUMENT FEEDBACK
T e l : 7 8 1 . 3 2 9 . 4 7 0 0 © 2 0 2 4 A n a l o g D e v i c e s , I n c . A l l r i g h t s r e s e r v e d .
Evaluation Board User Guide
System Management
2xLT7171-1, 40A
2
C/SMBus/PMBus dongle DC1613A to
TYP MAX
16
1.0
40
1 1.075
88.2
signals. LT7171-1 is capable of a
PULLUP
TECHNICAL SUPPORT
®
onto the PC
UNITS
V
V
A
MHz
%