LTM4601A_15 Datasheet, PDF (1/30 Pages) Linear Technology – 12A Module Regulators with PLL, Output Tracking and Margining

FEATURES
n _{Complete Switch Mode Power Supply}
n _{Wide Input Voltage Range: 4.5V to 20V}
n _{12A DC Typical, 14A Peak Output Current}
n _{0.6V to 5V Output Voltage}
n _{Output Voltage Tracking and Margining}
n _{Redundant Mounting Pads for Enhanced Solder-}
Joint Strength
n _{Parallel Multiple µModules for Current Sharing}
n _{Differential Remote Sensing for Precision}
Regulation (LTM4601A Only)
n _{PLL Frequency Synchronization}
n _{±1.5% Total DC Error}
n _{Current Foldback Protection (Disabled at Start-Up)}
n _{SnPb or RoHS Compliant Finish}
n _{UltraFast™ Transient Response}
n _{Current Mode Control}
n _{Up to 95% Efficiency at 5VIN, 3.3VOUT}
n _{Programmable Soft-Start}
n _{Output Overvoltage Protection}
n _{Enhanced (15mm × 15mm × 2.82mm) Surface Mount}
LGA and (15mm × 15mm × 3.42mm) BGA Packages
APPLICATIONS
n _{Telecom and Networking Equipment}
n _Servers
LTM4601A/LTM4601A-1
12A µModule Regulators
with PLL, Output Tracking
and Margining
DESCRIPTION
The LTM^®4601A is a complete 12A step-down switch mode
DC/DC power supply with onboard switching controller,
MOSFETs, inductor and all support components. The
µModule^® regulator is housed in a small surface mount
15mm × 15mm × 2.82mm LGA or 15mm × 15mm ×
3.42mm BGA package. The LTM4601A LGA and BGA
packages are designed with redundant mounting pads to
enhance solder-joint strength for extended temperature
cycling endurance. Operating over an input voltage range
of 4.5V to 20V, the LTM4601A 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 and light weight package easily mounts
on the back side of PC boards. The µModule regulator
can be synchronized with an external clock for reducing
undesirable frequency harmonics and allows PolyPhase^®
operation for high load currents.
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 LTM4601A-1.
L, LT, LTC, LTM, µModule and PolyPhase are registered trademarks of Linear Technology
Corporation. UltraFast and LTpowerCAD are trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners. Protected by U.S. Patents
including 5481178, 5847554, 6304066, 6476589, 6580258, 6677210, 6774611.
TYPICAL APPLICATION
1.5V/12A Power Supply with 4.5V to 20V Input
V_IN
4.5V TO 20V
C_IN
CLOCK SYNC
TRACK/SS CONTROL
V_IN
PGOOD
PLLIN TRACK/SS
V_OUT
ON/OFF
R1
392k
RUN
COMP
INTV_CC
DRV_CC
MPGM
LTM4601A
SGND PGND
V_FB
MARG0
MARG1
V_{OUT_LCL}
DIFFV_OUT
V_OSNS+
V_OSNS–
f_SET
5% MARGIN
100pF
MARGIN
CONTROL
R_SET
40.2k
4601A TA01a
V_OUT
1.5V
12A
C_OUT
Efficiency and Power Loss
vs Load Current
95
4.0
EFFICIENCY 5V_IN
90
3.5
85
12V_IN
3.0
80
75
2.5
12V_IN
70
2.0
5V_IN
65
1.5
60
55
POWER LOSS
1.0
50
0
24
0.5
6 8 10 12 14
LOAD CURRENT (A)
4601A TA01b
For more information www.linear.com/LTM4601A
4601afe
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