LTM4601HV Datasheet, PDF (1/28 Pages) Linear Technology – 12A 28VIN DC/DC μModule with PLL, Output Tracking and Margining

FEATURES
■ _{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}
■ _{Parallel Multiple µModules}^TM _{for Current Sharing}
■ _{Differential Remote Sensing for Precision}
Regulation
■ _{PLL Frequency Synchronization}
■ _{±1.5% Regulation}
■ _{Current Foldback Protection (Disabled at Start-Up)}
■ _{Pb-Free (e4) RoHS Compliant Package with Gold}
Finish Pads
■ _{Ultrafast Transient Response}
■ _{Current Mode Control}
■ _{Up to 95% Efficiency at 5VIN, 3.3VOUT}
■ _{Programmable Soft-Start}
■ _{Output Overvoltage Protection}
■ _{Small Footprint, Low Profile (15mm × 15mm ×}
2.8mm) Surface Mount LGA Package
U
APPLICATIO S
■ _{Telecom and Networking Equipment}
■ _Servers
■ _{Industrial Equipment}
■ _{Point of Load Regulation}
LTM4601HV
12A 28V_IN DC/DC µModule
with PLL, Output Tracking
and Margining
DESCRIPTIO
The LTM^®4601HV 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 is housed in a small surface mount 15mm
×15mm × 2.8mm LGA package. Operating over an input
voltage range of 4.5 to 28V, the LTM4601HV supports an
output voltage 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) package
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.
A high switching frequency and adaptive on-time current
mode architecture deliver a very fast transient response
to line and load changes without sacrificing stability. An
onboard differential remote sense amplifier can be used
to accurately regulate an output voltage independent of
load current.
, LT, LTC, LTM and PolyPhase are registered trademarks of Linear Technology
Corporation. µModule is a trademark 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 APPLICATIO
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 _LTM4601HV 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
4601HV TA01a
Efficiency and Power Loss
vs Load Current
95
6
90
12V_IN
85
5
80
24V_IN
EFFICIENCY
4
75
70
3
65
24V_IN
60
12V_IN
2
POWER LOSS
55
1
50
45
0
0 2 4 6 8 10 12 14
LOAD CURRENT (A)
4601HV TA01b
4601hvf
1