1
Rev. B
TYPICAL APPLICATION
FEATURES
DESCRIPTION
Dual 30A or Single 60A µModule Regulator
with Digital Power System Management
The
is a dual 30A or single 60A step-down
µModule
®
(power module) DC/DC regulator featuring
remote configurability and telemetry-monitoring of power
management parameters over PMBus
—an open stan-
dard I
2
C-based digital interface protocol. The LTM4680
is comprised of digitally programmable analog control
loops, precision mixed-signal circuitry, EEPROM, power
MOSFETs, inductors and supporting components.
The LTM4680 product video is available on the website.
The LTM4680’s 2-wire serial interface allows outputs
to be margined, tuned and ramped up and down at pro-
grammable slew rates with sequencing delay times. True
input current sense, output currents and voltages, output
power, temperatures, uptime and peak values are read-
able. Custom configuration of the EEPROM contents is not
required. At start-up, output voltages, switching frequency,
and channel phase angle assignments can be set by pin-
strapping resistors. The
GUI and DC1613
USB-to-PMBus converter and demo kits are available.
The LTM4680 is offered in a 16mm
×
16mm
×
7.82mm
BGA package available with SnPb or RoHS compliant ter-
minal finish. Pin compatible with LTM4678.
APPLICATIONS
n
Dual 30A or Single 60A Digitally Adjustable Analog
Loops with Digital Interface for Control and Monitoring
n
Wide Input Voltage Range: 4.5V to 16V
n
Output Voltage Range: 0.5V to 3.3V
n
90% Full Load Efficiency from 12V
IN
to 1V
OUT
at 60A
n
±0.5% Maximum DC Output Error Over Temperature
n
±2.5% Current Readback Accuracy (25°C to 125°C)
n
Integrated Input Current Sense Amplifier
n
400kHz PMBus-Compliant I
2
C Serial Interface
n
Supports Telemetry Polling Rates up to 125Hz
n
Constant Frequency Current Mode Control
n
Parallel and Current Share Multiple Modules
n
Pin Compatible with LTM4678
n
16mm
×
16mm
×
7.82mm BGA Package
Readable Data:
n
Input and Output Voltages, Currents, and Temperatures
n
Running Peak Values, Uptime, Faults and Warnings
n
Onboard EEPROM Fault Log Record
Writable Data and Configurable Parameters:
n
Output Voltage, Voltage Sequencing and Margining
n
Digital Soft-Start/Stop Ramp, Program Analog Loop
n
OV/UV/OT, UVLO, Frequency and Phasing
n
System Optimization, Characterization and Data Mining
in Prototype, Production and Field Environments
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.
Dual 30A µModule Regulator with Digital Interface for Control and Monitoring*
Efficiency vs Current at 12V Input
1.0V, 250kHz
1.5V, 425kHz
LOAD CURRENT (A)
0
5
10
15
20
25
30
65
70
75
80
85
90
95
100
EFFICIENCY (%)
4680 TA01b
R
SENSE
22µF
×5
100µF
×8
100µF
×8
V
OSNS0
+
V
OSNS0
–
FAULT0
FAULT1
WP
SYNC
V
IN0
V
OUT0
SCL
SDA
RUN0
RUN1
V
IN1
V
OSNS1
+
V
OUT1
ALERT
SHARE_
CLK
GND
SV
IN
V
OSNS1
–
SGND
IN
+
IN
–
LTM4680
LOAD0
LOAD1
I
2
C/SMBus I/F WITH PMBus
COMMAND SET TO/FROM
IPMI OR OTHER BOARD
MANAGEMENT CONTROLLER
4.5V to 16V
(FROM
4.5V TO 5.75V,
CONNECT
V
IN
, SV
IN
AND INTV
CC
TOGETHER)
ON/OFF CONTROL
FAULT INTERRUPTS
SYNCHRONIZATION TIME-BASE
REGISTER WRITE PROTECTION
V
OUT1
ADJUSTABLE
UP TO 30A
V
OUT0
ADJUSTABLE
UP TO 30A
4680 TA01a
*FOR COMPLETE CIRCUIT, SEE FIGURE 46
Click to view associated Video Design Idea.
