Linear Technology LTM4619EV Demo Board µModule Regulator with Tracking DC1453A DC1453A 数据表
产品代码
DC1453A
LTM4619
1
4619fb
Typical applicaTion
DescripTion
Dual, 26V
IN
, 4A DC/DC
µModule Regulator
The
down DC/DC µModule
®
(micromodule) regulator. Included
in the package are the switching controller, power FETs,
inductor, and all support components. Operating over
input voltage ranges of 4.5V to 26.5V, the LTM4619 sup-
ports two outputs with voltage ranges of 0.8V to 5V, each
set by a single external resistor. Its high efficiency design
delivers 4A continuous current (5A peak) for each output.
High switching frequency and a current mode architecture
High switching frequency and a current mode architecture
enable a very fast transient response to line and load
changes without sacrificing stability. The two outputs
are interleaved with 180° phase to minimize the ripple
noise and reduce the I/O capacitors. The device supports
frequency synchronization and output voltage tracking for
supply rail sequencing. Burst Mode operation or pulse-
skipping mode can be selected for light load operations.
Fault protection features include overvoltage protection,
Fault protection features include overvoltage protection,
overcurrent protection and foldback current limit for
short-circuit protection.
The low profile package (2.82mm) enables utilization of
The low profile package (2.82mm) enables utilization of
unused space on the bottom of PC boards for high density
point of load regulation. The power module is offered in
a 15mm
× 15mm × 2.82mm LGA package. The LTM4619
is RoHS compliant with Pb-free finish.
Dual 4A 3.3V/2.5V DC/DC µModule Regulator
FeaTures
applicaTions
n
Complete Standalone Power Supply
n
Wide Input Voltage Range: 4.5V to 26.5V
(EXTV
CC
Available for V
IN
≤ 5.5V)
n
Dual 180° Out-of-Phase Outputs with 4A DC
Typical, 5A Peak Output Current for Each
n
Dual Outputs with 0.8V to 5V Range
n
Output Voltage Tracking
n
±1.5% Maximum Total DC Output Error
n
Current Mode Control/Fast Transient Response
n
Power Good
n
Phase-Lockable Fixed Frequency 250kHz to 780kHz
n
On Board Frequency Synchronization
n
Parallel Current Sharing
n
Selectable Burst Mode
®
Operation
n
Output Overvoltage Protection
n
15mm
× 15mm × 2.82mm LGA Package
n
Telecom and Networking Equipment
n
Servers
n
Storage Cards
n
ATCA Cards
n
Industrial Equipment
n
Point of Load Regulation
Efficiency and Power Loss at 12V input
4619 TA01a
V
IN
V
FB1
COMP1
V
OUT1
TK/SS1
RUN1
PGOOD
FREQ/PLLFLTR
V
FB2
COMP2
V
OUT2
TK/SS2
RUN2
EXTV
CC
INTV
CC
MODE/PLLIN
LTM4619
SGND
PGND
28k
19.1k
100µF
100µF
V
OUT2
3.3V/4A
V
OUT1
2.5V/4A
0.1µF
10µF
×2
0.1µF
5.5V TO 26.5V
22pF
22pF
LOAD CURRENT (A)
0
EFFICIENCY (%)
POWER LOSS (W)
95
90
80
70
85
75
60
65
55
2.0
1.5
1.0
0.5
0
3
2
1
1.5
3.5
4619 TA01b
4
2.5
0.5
2.5V
OUT
3.3V
OUT
EFFICIENCY
POWER LOSS
L
, LT, LTC, LTM, Linear Technology, the Linear logo, Burst Mode and µModule are registered
trademarks and LTpowerCAD is a trademark of Linear Technology Corporation. All other
trademarks are the property of their respective owners.