LTM4603HV
6A, 28V DC/DC µModule
IN
with PLL, Output Tracking
and Margining
U
DESCRIPTIO
FEATURES
TheLTM®4603HVisacomplete6Astep-downswitchmode
DC/DC power supply with onboard switching controller,
MOSFETs, inductor and all support components. The
μModuleTM 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 LTM4603HV supports an
outputvoltagerangeof0.6Vto5Vaswellasoutputvoltage
tracking and margining. The high efficiency design deliv-
ers 6A continuous current (8A peak). Only bulk input and
output capacitors are needed to complete the design.
■
Complete Switch Mode Power Supply
■
Wide Input Voltage Range: 4.5V to 28V
■
6A DC Typical, 8A Peak Output Current
■
0.6V to 5V Output Voltage
■
Output Voltage Tracking and Margining
■
Remote Sensing for Precision Regulation
■
Typical Operating Frequency: 1MHz
■
PLL Frequency Synchronization
■
1.5% Regulation
■
Current Foldback Protection (Disabled at Start-Up)
■
Pin Compatible with the LTM4601/LTM4601HV/
The low profile (2.8mm) and light weight (1.7g) package
easily mounts on the 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.
LTM4603
■
Ultrafast Transient Response
■
Current Mode Control
■
Up to 93% Efficiency at 5V , 3.3V
IN
OUT
■
■
■
Programmable Soft-Start
Output Overvoltage Protection
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 remote sense amplifier can be used to accurately
regulate an output voltage independent of load current.
Pb-Free (e4) RoHS Compliant Package with Gold
Finish Pads
■
Small Footprint, Low Profile (15mm × 15mm ×
2.8mm) SurfaceUMount LGA Package
APPLICATIO S
, 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.
■
Telecom and Networking Equipment
■
Servers
■
Industrial Equipment
Point of Load Regulation
■
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TYPICAL APPLICATIO
2.5V/6A with 4.5V to 28V Input μModule Regulator
CLOCK SYNC
Efficiency vs Load Current with 24VIN
100
V
IN
4.5V TO 28V
TRACK/SS CONTROL
90
80
70
60
V
IN
PLLIN TRACK/SS
V
2.5V
6A
OUT
PGOOD
V
OUT
100pF
V
FB
ON/OFF
RUN
COMP
INTV
MARG0
MARG1
V
OUT_LCL
MARGIN
CONTROL
C
OUT
LTM4603HV
C
IN
CC
19.1k
DRV
DIFFV
V
24V , 1.8V
IN
CC
OUT
+
OUT
OUT
OUT
24V , 2.5V
IN
MPGM
SGND PGND
50
40
OSNS
24V , 3.3V
–
IN
V
OSNS
24V , 5V
IN
OUT
392k
f
SET
0
1
2
3
4
5
6
7
5% MARGIN
LOAD CURRENT (A)
4603HV TA01a
4603HV G03
4603hvf
1