LTM4601AHV Datasheet, PDF (1/28 Pages) Linear Technology – 12A, 28VIN DC/DC μModule with PLL, Output Tracking and Margining

LTM4601AHV
FEATURES
12A, 28V_IN DC/DC µModule
with PLL, Output Tracking
and Margining
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 μModules}^TM _{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 _{Pb-Free (e4) RoHS Compliant Package with Gold}
Finish Pads
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 × 2.8mm) Surface Mount}
LGA Package
APPLICATIONS
n _{Telecom, Industrial and Networking Equipment}
n _{Military and Avionics Systems}
The LTM^®4601AHV is a complete 12A step-down switch
mode DC/DC power supply with onboard switching
controller, MOSFETs, inductor and all support compo-
nents. The μModule is housed in a small surface mount
15mm × 15mm × 2.8mm LGA package. The LTM4601AHV
LGA package is designed with redundant mounting pads
to enhance solder-joint strength for extended temperature
cycling endurance. Operating over an input voltage range
of 4.5 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 (2.8mm) and light weight (1.7g) pack-
age easily mounts in unused space on the back side of
PC boards for high density point of load regulation. The
μModule 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.
L, LT, LTC and LTM are registered trademarks of Linear Technology Corporation. PolyPhase is
a registered trademark of Linear Technology Corporation. μModule and Ultrafast 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
4601ahvf
1