LTM4603HV Datasheet, PDF (1/24 Pages) Linear Technology – 6A, 28VIN DC/DC μModule with PLL, Output Tracking and Margining

FEATURES
■ _{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/}
LTM4603
■ _{Ultrafast Transient Response}
■ _{Current Mode Control}
■ _{Up to 93% Efficiency at 5VIN, 3.3VOUT}
■ _{Programmable Soft-Start}
■ _{Output Overvoltage Protection}
■ _{Pb-Free (e4) RoHS Compliant Package with Gold}
Finish Pads
■ _{Small Footprint, Low Profile (15mm × 15mm ×}
2.8mm) Surface_UMount LGA Package
APPLICATIO S
■ _{Telecom and Networking Equipment}
■ _Servers
■ _{Industrial Equipment}
■ _{Point of Load Regulation}
LTM4603HV
6A, 28V_IN DC/DC µModule
with PLL, Output Tracking
and Margining
DESCRIPTIO
The LTM^®4603HV is a complete 6A 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 28V, the LTM4603HV supports an
output voltage range of 0.6V to 5V as well as output voltage
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.
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.
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.
, 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.
TYPICAL APPLICATIO
2.5V/6A with 4.5V to 28V Input μModule Regulator
V_IN
4.5V TO 28V
C_IN
CLOCK SYNC
TRACK/SS CONTROL
ON/OFF
392k
V_IN
PGOOD
PLLIN TRACK/SS
V_OUT
V_FB
RUN
MARG0
COMP _LTM4603HV MARG1
INTV_CC
V_{OUT_LCL}
DRV_CC
MPGM
DIFFV_OUT
V_OSNS+
V_OSNS–
SGND PGND ^fSET
100pF
MARGIN
CONTROL
19.1k
V_OUT
2.5V
6A
C_OUT
5% MARGIN
4603HV TA01a
Efficiency vs Load Current with 24V_IN
100
90
80
70
60
50
40
01
24V_IN, 1.8V_OUT
24V_IN, 2.5V_OUT
24V_IN, 3.3V_OUT
24V_IN, 5V_OUT
2 34 5 6 7
LOAD CURRENT (A)
4603HV G03
4603hvf
1