POWER LOSS (W)
LTM4601/LTM4601-1
12A Module Regulators
with PLL, Output Tracking
and Margining
Fea T Descrip T
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Complete Switch Mode Power Supply The LTM 4601 is a complete 12A step-down switch mode
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Wide Input Voltage Range: 4.5V to 20V DC/DC power supply with onboard switching controller,
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12A DC Typical, 14A Peak Output Current MOSFETs, inductor and all support components. The
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0.6V to 5V Output Voltage Module regulator is housed in small surface mount
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Output Voltage Tracking and Margining 15mm 15mm 2.82mm LGA and 15mm 15mm
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Parallel Multiple Module Regulators for Current 3.42mm BGA packages. Operating over an input voltage
Sharing range of 4.5V to 20V, the LTM4601 supports an output
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Differential Remote Sensing for Precision voltage range of 0.6V to 5V as well as output voltage
Regulation (LTM4601 Only) tracking and margining. The high efficiency design deliv -
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PLL Frequency Synchronization ers 12A continuous current (14A peak). Only bulk input
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1.5% Regulation and output capacitors are needed to complete the design.
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Current Foldback Protection (Disabled at Start-Up)
The low profile and light weight package easily mounts
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SnPb or RoHS Compliant Finish
in unused space on the back side of PC boards for high
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UltraFast Transient Response
density point of load regulation. The Module regulator
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Current Mode Control
can be synchronized with an external clock for reducing
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Up to 95% Efficiency at 5V , 3.3V
IN OUT
undesirable frequency harmonics and allows PolyPhase
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Programmable Soft-Start
operation for high load currents.
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Output Overvoltage Protection
n A high switching frequency and adaptive on-time current
Small Footprint, Low Profile
mode architecture deliver a very fast transient response
(15mm 15mm 2.82mm) Surface Mount LGA and
to line and load changes without sacrificing stability. An
(15mm 15mm 3.42mm) BGA Packages
onboard differential remote sense amplifier can be used
to accurately regulate an output voltage independent of
a T
load current. The onboard remote sense amplifier is not
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Telecom and Networking Equipment
available in the LTM4601-1.
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Servers
L, LT, LTC, LTM, Linear Technology, the Linear logo, Module and PolyPhase are registered
n trademarks and UltraFast and LTpowerCAD are trademarks of Linear Technology Corporation.
Industrial Equipment
All other trademarks are the property of their respective owners. Protected by U.S. Patents
n
Point of Load Regulation including 5481178, 5847554, 6580258, 6304066, 6476589, 6774611, 6677210.
Efficiency and Power Loss
Typical a T
vs Load Current
1.5V/12A Power Supply with 4.5V to 20V Input
95 4.0
EFFICIENCY
5V
IN
CLOCK SYNC
V 90
IN
3.5
TRACK/SS CONTROL
4.5V TO 20V
85
V PLLIN TRACK/SS
IN V 12V
OUT
IN 3.0
1.5V 80
PGOOD V
OUT
100pF 12A
2.5
V
75
FB
12V
IN
RUN MARG0
ON/OFF MARGIN
70
2.0
COMP MARG1 CONTROL
C 5V
IN
LTM4601 OUT
C
IN
INTV V 65
CC OUT_LCL
1.5
DRV DIFFV
CC OUT
60
+
MPGM V
POWER LOSS
OSNS
1.0
55
V
OSNS
R1
f
SGND PGND SET
392k R
50 0.5
SET
40.2k 0 2 4 6 8 10 12 14
5% MARGIN
LOAD CURRENT (A)
4601 TA01a
4601 TA01b
4601fe
1
For more information www.linear.com/LTM4601
EFFICIENCY (%)
ion pplica
ions pplica
ion uresLTM4601/LTM4601-1
a Te Maxi Mu M r a T
(Note 1)
INTV , DRV , V , V (V 3.3V with V ............................................................. 0.3V to 20V
CC CC OUT_LCL OUT OUT IN
+
DIFFV ) .................................................... 0.3V to 6V V , V ..........................0.3V to INTV + 0.3V
OUT OSNS OSNS CC
PLLIN, TRACK/SS, MPGM, MARG0, MARG1, Operating Temperature Range (Note 2)....40C to 85C
PGOOD, f ..............................0.3V to INTV + 0.3V Junction Temperature ........................................... 125C
SET CC
RUN (Note 5) ............................................... 0.3V to 5V Storage Temperature Range .................. 55C to 125C
V , COMP ................................................ 0.3V to 2.7V Reofl w (Peak Body) Temperature .......................... 245C
FB
p in c F T
TOP VIEW
TOP VIEW
V f V f
SET
IN IN SET
MARG0
MARG0
MARG1 MARG1
DRV
DRV
CC CC
V V
FB
FB
PGND PGND
PGOOD PGOOD
SGND
SGND
+
+
V /NC2*
OSNS V /NC2*
OSNS
DIFFV /NC3*
OUT DIFFV /NC3*
OUT
V V
OUT
OUT
V
V
OUT_LCL OUT_LCL
V /NC1*
OSNS V /NC1*
OSNS
BGA PACKAGE
LGA PACKAGE
118-LEAD (15mm 15mm 3.42mm)
118-LEAD (15mm 15mm 2.82mm)
T = 125C, = 15.5C/W, = 6.5C/W,
T = 125C, = 15C/W, = 6C/W,
JMAX JA JC
JMAX JA JC
DERIVED FROM 95mm 76mm PCB WITH 4 LAYERS
DERIVED FROM 95mm 76mm PCB WITH 4 LAYERS
JA
JA
WEIGHT = 1.7g
WEIGHT = 1.9g
*LTM4601-1 ONLY
*LTM4601-1 ONLY
o r Der i n F Ma T
PART NUMBER PAD OR BALL FINISH PART MARKING* PACKAGE MSL TEMPERATURE RANGE
TYPE RATING (Note 2)
DEVICE FINISH CODE
LTM4601EV#PBF Au (RoHS) LTM4601V e4 LGA 3 40C to 85C
LTM4601IV#PBF Au (RoHS) LTM4601V e4 LGA 3 40C to 85C
LTM4601EV-1#PBF Au (RoHS) LTM4601V-1 e4 LGA 3 40C to 85C
LTM4601IV-1#PBF Au (RoHS) LTM4601V-1 e4 LGA 3 40C to 85C
LTM4601EY#PBF SAC305 (RoHS) LTM4601Y e1 BGA 3 40C to 85C
LTM4601IY#PBF SAC305 (RoHS) LTM4601Y e1 BGA 3 40C to 85C
LTM4601EY-1#PBF SAC305 (RoHS) LTM4601Y-1 e1 BGA 3 40C to 85C
LTM4601IY-1#PBF SAC305 (RoHS) LTM4601Y-1 e1 BGA 3 40C to 85C
LTM4601IY SnPb (63/37) LTM4601Y e0 BGA 3 40C to 85C
LTM4601IY-1 SnPb (63/37) LTM4601Y-1 e0 BGA 3 40C to 85C
4601fe
2
For more information www.linear.com/LTM4601
INTV
CC
PLLIN
TRACK/SS
RUN
COMP
MPGM
INTV
CC
PLLIN
TRACK/SS
RUN
COMP
MPGM
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