LTM4601AHV_15 Datasheet, PDF (1/30 Pages) Linear Technology – 12A, 28VIN DC/DC Module Regulator with PLL, Output Tracking and Margining

LTM4601AHV
12A, 28V_IN DC/DC µModule
Regulator with PLL, Output
Tracking and Margining
Features
Description
n _{Complete Switch Mode Power Supply}
n _{Wide Input Voltage Range: 4.5V to 28V}
n _{12A DC Typical, 14A Peak Output Current}
n _{0.6V to 5V Output Voltage}
n _{Output Voltage Tracking and Margining}
n _{Redundant Mounting Pads for Enhanced}
Solder-Joint Strength
n _{Parallel Multiple µModule}^® _{Regulators for}
Current Sharing
n _{Differential Remote Sensing for Precision Regulation}
n _{PLL Frequency Synchronization}
n _{±1.5% Total DC Error}
n _{Current Foldback Protection (Disabled at Start-Up)}
n _{SnPb or RoHS Compliant Finish}
n _{–55°C to 125°C Operating Temperature Range}
(LTM4601AHVMPV)
n _{Ultrafast™ Transient Response}
n _{Up to 95% Efficiency at 5VIN, 3.3VOUT}
n _{Programmable Soft-Start}
n _{Output Overvoltage Protection}
n _{Enhanced (15mm × 15mm × 2.82mm) Surface Mount}
LGA and (15mm × 15mm × 3.42mm) BGA Packages
Applications
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.
n _{Telecom, Industrial and Networking Equipment}
n _{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.
Typical Application
2.5V/12A Power Supply with 4.5V to 28V Input
V_IN
4.5V TO 28V
C_IN
CLOCK SYNC
TRACK/SS CONTROL
V_IN
PGOOD
PLLIN TRACK/SS
V_OUT
ON/OFF
R1
392k
V_FB
RUN
MARG0
COMP _LTM4601AHV MARG1
INTV_CC
V_{OUT_LCL}
DRV_CC
MPGM
DIFFV_OUT
V_OSNS+
V_OSNS–
SGND PGND ^fSET
5% MARGIN
100pF
MARGIN
CONTROL
V_OUT
2.5V
12A
C_OUT
R_SET
19.1k
4601AHV TA01a
Efficiency and Power Loss
vs Load Current
95
6
90 ^{EFFICIENCY 12VIN}
85
5
80
24V_IN
4
75
POWER LOSS
70
3
65
24V_IN
60
12V_IN
2
55
1
50
45
0
0 2 4 6 8 10 12 14
LOAD CURRENT (A)
4601AHV TA01b
For more information www.linear.com/LTM4601AHV
4601ahvfc
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