Regulators. LTM4601-1 Datasheet

LTM4601-1 Datasheet PDF

Part LTM4601-1
Description 12A uModule Regulators
Feature Features n Complete Switch Mode Power Supply n Wide Input Voltage Range: 4.5V to 20V n 12A DC Typ.
Manufacture Linear Technology
Datasheet
Download LTM4601-1 Datasheet

Features n Complete Switch Mode Power Supply n Wide Input LTM4601-1 Datasheet





LTM4601-1
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 Parallel Multiple µModule Regulators for Current
Sharing
n Differential Remote Sensing for Precision
Regulation (LTM4601 Only)
n PLL Frequency Synchronization
n ±1.5% Regulation
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 Small Footprint, Low Profile
(15mm × 15mm × 2.82mm) Surface Mount LGA and
(15mm × 15mm × 3.42mm) BGA Packages
Applications
n Telecom and Networking Equipment
n Servers
n Industrial Equipment
n Point of Load Regulation
LTM4601/LTM4601-1
12A µModule Regulators
with PLL, Output Tracking
and Margining
Description
The LTM®4601 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 small surface mount
15mm × 15mm × 2.82mm LGA and 15mm × 15mm ×
3.42mm BGA packages. Operating over an input voltage
range of 4.5V to 20V, the LTM4601 supports an output
voltage range of 0.6V to 5V as well as output voltage
tracking and margining. The high efficiency design deliv-
ers 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
in unused space on the back side of PC boards for high
density point of load regulation. The µModule regulator
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 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 LTM4601-1.
L, LT, LTC, LTM, Linear Technology, the Linear logo, µModule and PolyPhase are registered
trademarks and 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, 6580258, 6304066, 6476589, 6774611, 6677210.
Typical Application
1.5V/12A Power Supply with 4.5V to 20V Input
VIN
4.5V TO 20V
CIN
CLOCK SYNC
TRACK/SS CONTROL
VIN
PGOOD
PLLIN TRACK/SS
VOUT
ON/OFF
R1
392k
RUN
COMP
INTVCC
DRVCC
MPGM
LTM4601
SGND PGND
VFB
MARG0
MARG1
VOUT_LCL
DIFFVOUT
VOSNS+
VOSNS–
fSET
5% MARGIN
100pF
MARGIN
CONTROL
RSET
40.2k
4601 TA01a
VOUT
1.5V
12A
COUT
Efficiency and Power Loss
vs Load Current
95
EFFICIENCY
90
5VIN
85 12VIN
80
75
70 12VIN
65 5VIN
60
POWER LOSS
55
4.0
3.5
3.0
2.5
2.0
1.5
1.0
50
0
24
0.5
6 8 10 12 14
LOAD CURRENT (A)
4601 TA01b
For more information www.linear.com/LTM4601
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1



LTM4601-1
LTM4601/LTM4601-1
Absolute Maximum Ratings
(Note 1)
INTVCC, DRVCC, VOUT_LCL, VOUT (VOUT ≤ 3.3V with
DIFFVOUT)..................................................... –0.3V to 6V
PLLIN, TRACK/SS, MPGM, MARG0, MARG1,
PGOOD, fSET...............................–0.3V to INTVCC + 0.3V
RUN (Note 5)................................................ –0.3V to 5V
VFB, COMP................................................. –0.3V to 2.7V
VVOINS.N..S..+..,..V..O..S..N..S.........................................................–..0....3..V...t.o...I.N–T0V.3CVC
to 20V
+ 0.3V
Operating Temperature Range (Note 2)....–40°C to 85°C
Junction Temperature............................................ 125°C
Storage Temperature Range................... –55°C to 125°C
Reflow (Peak Body) Temperature........................... 245°C
Pin Configuration
TOP VIEW
TOP VIEW
VIN
PGND
VOUT
fSET
MARG0
MARG1
DRVCC
VFB
PGOOD
SGND
VOSNS+/NC2*
DIFFVOUT/NC3*
VOUT_LCL
VOSNS–/NC1*
LGA PACKAGE
118-LEAD (15mm × 15mm × 2.82mm)
TJMAX = 125°C, θJA = 15°C/W, θJC = 6°C/W,
θJA DERIVED FROM 95mm × 76mm PCB WITH 4 LAYERS
WEIGHT = 1.7g
*LTM4601-1 ONLY
VIN
PGND
VOUT
fSET
MARG0
MARG1
DRVCC
VFB
PGOOD
SGND
VOSNS+/NC2*
DIFFVOUT/NC3*
VOUT_LCL
VOSNS–/NC1*
BGA PACKAGE
118-LEAD (15mm × 15mm × 3.42mm)
TJMAX = 125°C, θJA = 15.5°C/W, θJC = 6.5°C/W,
θJA DERIVED FROM 95mm × 76mm PCB WITH 4 LAYERS
WEIGHT = 1.9g
*LTM4601-1 ONLY
Order Information
PART NUMBER
PAD OR BALL FINISH
LTM4601EV#PBF
LTM4601IV#PBF
LTM4601EV-1#PBF
LTM4601IV-1#PBF
LTM4601EY#PBF
LTM4601IY#PBF
LTM4601EY-1#PBF
LTM4601IY-1#PBF
LTM4601IY
LTM4601IY-1
Au (RoHS)
Au (RoHS)
Au (RoHS)
Au (RoHS)
SAC305 (RoHS)
SAC305 (RoHS)
SAC305 (RoHS)
SAC305 (RoHS)
SnPb (63/37)
SnPb (63/37)
PART MARKING*
DEVICE
FINISH CODE
LTM4601V
e4
LTM4601V
LTM4601V-1
e4
e4
LTM4601V-1
LTM4601Y
LTM4601Y
LTM4601Y-1
e4
e1
e1
e1
LTM4601Y-1
e1
LTM4601Y
e0
LTM4601Y-1
e0
PACKAGE
TYPE
LGA
LGA
LGA
LGA
BGA
BGA
BGA
BGA
BGA
BGA
2 For more information www.linear.com/LTM4601
MSL
RATING
3
3
3
3
3
3
3
3
3
3
TEMPERATURE RANGE
(Note 2)
–40°C to 85°C
–40°C to 85°C
–40°C to 85°C
–40°C to 85°C
–40°C to 85°C
–40°C to 85°C
–40°C to 85°C
–40°C to 85°C
–40°C to 85°C
–40°C to 85°C
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