Analog Devices Linear LTM 4700 User Manual

FEATURES

Dual 50A or Single 100A Digitally Adjustable Outputs with
n
Digital Interface for Control, Compensation and Monitoring
Wide Input Voltage: 4.5V to 16V
n
Output Voltage Range: 0.5V to 1.8V
n
~90% Full Load Efficiency from 12V
n
±0.5% Maximum DC Output Error Over Temperature
n
±3% Current Readback Accuracy (25°C to 125°C)
n
Integrated Input Current Sense Amplifier
n
400kHz PMBus-Compliant I
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Supports Telemetry Polling Rates Up to 125Hz
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Integrated 16-Bit ∆Σ ADC
n
Constant Frequency Current Mode Control
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Parallel and Current Share Multiple Modules
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15mm × 22mm × 7.87mm BGA Package
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Readable Data:
Input and Output Voltages, Currents, and Temperatures
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Running Peak Values, Uptime, Faults and Warnings
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Internal EEPROM and Fault Logging with ECC
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Writable Data and Configurable Parameters:
Output Voltage, Voltage Sequencing and Margining
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Digital Soft-Start/Stop Ramp
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Optimize Analog Loop Compensation
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OV/UV/OT, UVLO, Frequency and Phasing
n

APPLICATIONS

System Optimization, Characterization and Data Min-
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ing in Prototype, Production and Field Environments
Telecom, Datacom, and Storage Systems
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TYPICAL APPLICATION

Dual 50A µModule Regulator with Digital Interface
for Control and Monitoring*
V
IN
5.75V TO 16V
22µF
×8
ON/OFF CONTROL
FAULT INTERRUPTS,
POWER SEQUENCING
PWM CLOCK AND
TIME-BASE
SYNCHRONIZATION
REGISTER WRITE
PROTECTION
*FOR COMPLETE CIRCUIT, SEE FIGURE 46
Document Feedback
Dual 50A or Single 100A µModule Regulator
with Digital Power System Management
to 1V at 100A
IN OUT
2
C Serial Interface
V V
IN0 OUT0
V
+
IN1
V
OSNS0
SV
IN
LOAD
0
–
RUN
V
0
OSNS0
RUN
1
LTM4700
V
OUT1
FAULT0
+
V
OSNS1
FAULT1
–
LOAD
V
1
OSNS1
SGND
SYNC
SHARE_CLK
2
SCL
I C/SMBus I/F WITH
SDA
PMBus COMMAND SET
WP
ALERT
GND TO/FROM IPMI OR OTHER BOARD
MANAGEMENT CONTROLLER
4700 TA01a
For more information

DESCRIPTION

The LTM 4700
®
µModule (power module) DC/DC regulator featuring
®
remote configurability and telemetry-monitoring of power
management parameters over
2
I C-based digital interface protocol. The LTM4700 is
comprised of fast analog control loops, precision mixed-
signal circuitry, EEPROM, power MOSFETs, inductors and
supporting components. The LTM4700 product video is
available on website.
The LTM4700's 2-wire serial interface allows outputs to
be margined, tuned and ramped up and down at program-
mable slew rates with sequencing delay times. Input and
output currents and voltages, output power, temperatures,
uptime and peak values are readable. Custom configura-
tion of the EEPROM contents is not required. At start-up,
output voltages, switching frequency, and channel phase
angle as-signments can be set by pin-strapping resistors.
The LTpowerPlay
verter and demo kits
The LTM4700 is offered in a 15mm × 22mm × 7.87mm
BGA package available with SnPb or RoHS compliant
terminal finish.
All registered trademarks and trademarks are the property of their respective owners. Protected
by U.S. Patents including 5408150, 5481178, 5705919, 5929620, 6144194, 6177787, 6580258,
7420359, 8163643. Licensed under U.S. Patent 7000125 and other related patents worldwide.
Click to view associated Video Design Idea.
100
V ,
OUT0
ADJUSTABLE
95
UP TO 50A
220µF
90
×8
85
V ,
OUT1
ADJUSTABLE
UP TO 50A
80
220µF
×8
75
70
www.analog.com
LTM4700
is a dual 50A or single 100A step-down
PMBus— an open standard
GUI and DC1613 USB-to-PMBus con-
®
are available.
Efficiency vs Current at 12V Input
1.5V
1.0V
0 10 20 30 40
LOAD CURRENT (A)
OUT
OUT
50
4700 TA01b
Rev. B
1