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LTM4601V-1

Description
12A DC/DC μModules with PLL, Output Tracking and Margining
File Size384KB,28 Pages
ManufacturerLinear ( ADI )
Websitehttp://www.analog.com/cn/index.html
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LTM4601V-1 Overview

12A DC/DC μModules with PLL, Output Tracking and Margining

FEATURES
LTM4601/LTM4601-1
12A DC/DC µModules
with PLL, Output Tracking
and Margining
DESCRIPTIO
The LTM
®
4601 is a complete 12A step-down switch mode
DC/DC power supply with onboard switching controller,
MOSFETs, inductor and all support components. The
µModule
TM
is housed in a small surface mount 15mm
×15mm ×
2.8mm LGA package. Operating over an input
voltage range of 4.5 to 20V, the LTM4601 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) 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.
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. The onboard remote sense amplifier is not
available in the LTM4601-1.
, LTC, LT 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
Complete Switch Mode Power Supply
Wide Input Voltage Range: 4.5V to 20V
12A DC Typical, 14A Peak Output Current
0.6V to 5V Output Voltage
Output Voltage Tracking and Margining
Parallel Multiple µModules for Current Sharing
Differential Remote Sensing for Precision
Regulation (LTM4601 Only)
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 5V
IN
, 3.3V
OUT
Programmable Soft-Start
Output Overvoltage Protection
Small Footprint, Low Profile (15mm × 15mm ×
2.8mm) Surface Mount LGA Package
APPLICATIO S
Telecom and Networking Equipment
Servers
Industrial Equipment
Point of Load Regulation
TYPICAL APPLICATIO
V
IN
4.5V TO 20V
V
IN
PGOOD
RUN
COMP
INTV
CC
DRV
CC
MPGM
SGND
1.5V/12A Power Supply with 4.5V to 20V Input
95
CLOCK SYNC
TRACK/SS CONTROL
PLLIN TRACK/SS
V
OUT
V
FB
MARG0
MARG1
V
OUT_LCL
DIFFV
OUT
V
OSNS+
V
OSNS–
f
SET
R
SET
40.2k
4601 TA01a
Efficiency and Power Loss
vs Load Current
4.0
EFFICIENCY
90
V
OUT
1.5V
12A
85
EFFICIENCY (%)
80
75
70
65
60
POWER LOSS
55
50
0
2
4
6
8
10
OUTPUT CURRENT (A)
12
14
1.0
0.5
12V
IN
5V
IN
2.0
1.5
5V
IN
3.5
12V
IN
3.0
2.5
100pF
MARGIN
CONTROL
ON/OFF
C
IN
LTM4601
C
OUT
R1
392k
5% MARGIN
PGND
U
U
U
POWER LOSS (W)
4601 TA01b
4601f
1

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Description 12A DC/DC μModules with PLL, Output Tracking and Margining 12A DC/DC μModules with PLL, Output Tracking and Margining 12A DC/DC μModules with PLL, Output Tracking and Margining 12A DC/DC μModules with PLL, Output Tracking and Margining
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