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LTM4601AHV
Complete Switch Mode Power Supply
Wide Input Voltage Range: 4.5V to 28V
12A DC Typical, 14A Peak Output Current
0.6V to 5V Output Voltage
Output Voltage Tracking and Margining
Redundant Mounting Pads for Enhanced
Parallel Multiple μModule ? Regulators for
Differential Remote Sensing for Precision Regulation
PLL Frequency Synchronization
± 1.5% Total DC Error
Current Foldback Protection (Disabled at Start-Up)
SnPb or RoHS Compliant Finish
–55°C to 125°C Operating Temperature Range
Ultrafast? Transient Response
Up to 95% Efficiency at 5V IN , 3.3V OUT
Programmable Soft-Start
Output Overvoltage Protection
Enhanced (15mm × 15mm × 2.82mm) Surface Mount
FEATURES
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Solder-Joint Strength
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Current Sharing
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(LTM4601AHVMPV)
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LGA and (15mm × 15mm × 3.42mm) BGA Packages
APPLICATIONS
12A, 28V IN DC/DC μModule
Regulator with PLL, Output
Tracking and Margining
DESCRIPTION
The LTM ? 4601AHV is a complete 12A step-down switch
mode DC/DC power supply with onboard switching con-
troller, MOSFETs, inductor and all support components.
The μModule regulator is housed in a small surface mount
15mm × 15mm × 2.82mm LGA or 15mm × 15mm ×
3.42mm BGA package. The LTM4601AHV LGA and BGA
packages are designed with redundant mounting pads to
enhance solder-joint strength for extended temperature
cycling endurance. Operating over an input voltage range
of 4.5V to 28V, the LTM4601AHV supports an output volt-
age range of 0.6V to 5V as well as output voltage tracking
and margining. The high efficiency design delivers 12A
continuous current (14A peak). Only bulk input and output
capacitors are needed to complete the design.
The low profile and light weight package easily mounts
in unused space on the back side of PC boards for high
density point of load regulation. The μModule regulator
can be synchronized with an external clock for reducing
undesirable frequency harmonics and allows PolyPhase ?
operation for high load currents.
An onboard differential remote sense amplifier can be used
to accurately regulate an output voltage independent of
load current. The LTM4601AHV is available with SnPb or
RoHS compliant terminal finish.
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Telecom, Industrial and Networking Equipment
Military and Avionics Systems
L , LT, LTC and LTM, Linear Technology, the Linear logo, μModule and PolyPhase are
registered trademarks and Ultrafast and LTpowerCAD are trademarks of Linear Technology
Corporation. All other trademarks are the property of their respective owners. Protected by U.S.
Patents including 5481178, 5847554, 6580258, 6304066, 6476589, 6774611, 6677210.
V IN
4.5V TO 28V
LTM4601AHV
C IN
R SET
5% MARGIN
12V IN
TYPICALAPPLICATION
2.5V/12A Power Supply with 4.5V to 28V Input
CLOCK SYNC
TRACK/SS CONTROL
V IN PLLIN TRACK/SS
PGOOD V OUT
100pF
V FB
ON/OFF RUN MARG0 MARGIN
COMP MARG1 CONTROL
INTV CC V OUT_LCL
DRV CC DIFFV OUT
MPGM V OSNS+
R1 V OSNS–
392k SGND PGND f SET
19.1k
4601AHV TA01a
V OUT
2.5V
12A
C OUT
95
90
85
80
75
70
65
60
55
50
45
0
Efficiency and Power Loss
vs Load Current
EFFICIENCY
24V IN
POWER LOSS
24V IN
12V IN
2 4 6 8 10 12
LOAD CURRENT (A)
14
6
5
4
3
2
1
0
For more information www.linear.com/LTM4601AHV
4601AHV TA01b
4601ahvfc
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