LTM4604AV Ver la hoja de datos (PDF) - Analog Devices
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LTM4604AV Datasheet PDF : 22 Pages
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LTM4604A
Low Voltage, 4A DC/DC
µModule Regulator with Tracking
FEATURES
n Complete Standalone Power Supply
n ±1.75% Max Total DC Output Error (–40°C to 125°C)
n Wide Input Voltage Range: 2.375V to 5.5V
n 4A DC, 5A Peak Output Current
n 0.8V to 5V Output
n Output Voltage Tracking
n UltraFastTM Transient Response
n Power Good Indicator
n Current Mode Control
n Current Foldback Protection, Parallel/Current Sharing
n Up to 95% Efficiency
n Programmable Soft-Start
n Micropower Shutdown: IQ ≤ 7µA
n Overtemperature Protection
n 9mm × 15mm × 2.32mm LGA and
9mm × 15mm × 3.42mm BGA Packages
APPLICATIONS
n Telecom and Networking Equipment
n Servers
n Storage Cards
n ATCA Cards
n Industrial Equipment
DESCRIPTION
The LTM®4604A is a complete 4A switch mode step-down
µModule® (micromodule) regulator with ±1.75% maxi-
mum total output voltage error. Included in the package
are the switching controller, power FETs, inductor and
all support components. Operating over an input voltage
range of 2.375V to 5.5V, the LTM4604A supports an out-
put voltage range of 0.8V to 5V, set by a single resistor.
This high efficiency design delivers up to 4A continuous
current (5A peak). Only input and output capacitors are
needed to complete the design.
The 0.630mm LGA pads with 1.27mm pitch simplify
PCB layout by providing standard trace routing and via
placement. (The LTM4604A has smaller pads than the
LTM4604). The low profile package enables utilization
of unused space on the bottom of PC boards for high
density point of load regulation. High switching fre-
quency and a current mode architecture enable a very
fast transient response to line and load changes without
sacrificing stability.
Fault protection features include foldback current protec-
tion, thermal shutdown and a programmable soft-start
function. The LTM4604A is offered with SnPb (BGA) or
RoHS-compliant terminal finish.
All registered trademarks and trademarks are the property of their respective owners.
TYPICAL APPLICATION
3.3V to 2.5V/4A µModule Regulator
VIN
3.3V
10µF
6.3V
VIN
PGOOD VOUT
LTM4604A
COMP
FB
RUN/SS TRACK
GND
VIN
2.37k
VOUT
2.5V
4A
22µF
6.3V
×2
4604A TA01a
Efficiency vs Output Current
100
VIN = 3.3V
95
VOUT = 2.5V
90
85
80
75
70
65
0
1
2
3
OUTPUT CURRENT (A)
4
4604A TA01b
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For more information www.analog.com
Rev. D
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