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LTM4631 Datasheet

Ultrathin Dual 10A or Single 20A DC/DC uModule Regulator

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LTM4631
Ultrathin Dual 10A or Single 20A
DC/DC µModule Regulator
Features
n Dual 10A or Single 20A Output
n Input Voltage Range: 4.5V to 15V
n Output Voltage Range: 0.6V to 1.8V
n ±1.5% Maximum Total DC Output Error Over Line,
Load and Temperature
n Differential Remote Sense Amplifier
n Current Mode Control/Fast Transient Response
n Adjustable Switching Frequency
n Overcurrent Foldback Protection
n Multiphase Parallel Current Sharing with Multiple
LTM4631s
n Frequency Synchronization
n Internal Temperature Monitor
n Selectable Burst Mode® Operation
n Soft-Start/Voltage Tracking
n Output Overvoltage Protection
n Ultrathin 16mm × 16mm × 1.91mm LGA and
16mm × 16mm × 2.51mm BGA Packages
Applications
n Telecom and Networking Equipment
n Storage and ATCA Cards
n Industrial Equipment
Description
The LTM®4631 is a dual 10A or single 20A output switch-
ing mode step-down DC/DC µModule® (power module)
regulator. Included in the package are the switching con-
troller, power FETs, inductors and all supporting compo-
nents. Operating from an input voltage range of 4.5V to
15V, the LTM4631 supports two outputs each with an
output voltage range of 0.6V to 1.8V, each set by a single
external resistor. Its high efficiency design delivers up to
10A continuous current for each output. Only a few input
and output capacitors are needed.
The device supports frequency synchronization, multi-
phase operation, Burst Mode operation and output voltage
tracking for supply rail sequencing and has an onboard
temperature diode for device temperature monitoring.
High switching frequency and a current mode architec-
ture enable a very fast transient response to line and load
changes without sacrificing stability.
Fault protection features include overvoltage and
overcurrent protection. The LTM4631 is offered in an
ultrathin 16mm × 16mm × 1.91mm LGA and 16mm ×
16mm × 2.51mm BGA packages. The LTM4631 is avail-
able with SnPb (BGA) or ROHS compliant terminal finish.
L, LT, LTC, LTM, Linear Technology, the Linear logo, µModule, Burst Mode and PolyPhase
are registered trademarks of Analog Devices, Inc. All other trademarks are the property of their
respective owners. Protected by U.S. Patents, including 5481178, 5705919, 5929620, 6100678,
6144194, 6177787, 6304066 and 6580258. Other patents pending.
Typical Application
20A, 1.2V Output Ultrathin µModule Regulator
VIN
4.5V TO 15V
22µF
25V 120k
×4
0.1µF
PINS NOT USED IN THIS CIRCUIT:
CLKOUT
EXTVCC
SW1
SW2
VOUTS2
147k
INTVCC
4.7µF 10k
MODE_PLLIN INTVCC
VIN
TEMP
TRACK1
TRACK2
fSET
PHASMD
SGND
LTM4631
GND
PGOOD1
VOUT1
VOUTS1
DIFFOUT
VFB1
VFB2
DIFFP
VOUT2
PGOOD2
DIFFN
PGOOD
100µF +
6.3V
470µF
6.3V
60.4k
PGOOD
100µF +
6.3V
VOUT
1.2V
20A
470µF
6.3V
4631 TA01a
For more information www.linear.com/LTM4631
1.2V Output Efficiency
vs Load Current
90
85
80
75
70
5V INPUT
12V INPUT
65
0 2 4 6 8 10
LOAD CURRENT (A)
3060 TA01b
4631fb
1


Analog Devices Semiconductor Electronic Components Datasheet

LTM4631 Datasheet

Ultrathin Dual 10A or Single 20A DC/DC uModule Regulator

No Preview Available !

LTM4631
Absolute Maximum Ratings
(Note 1)
VIN...............................................................–0.3V to 16V
VSW1, VSW2.....................................................–1V to 16V
PGOOD1, PGOOD2, RUN1, RUN2,
INTVCC, EXTVCC........................................... –0.3V to 6V
MODE_PLLIN, fSET, TRACK1, TRACK2,
DIFFOUT, PHASMD................................ –0.3V to INTVCC
VOUT1, VOUT2, VOUTS1, VOUTS2 (Note 6)......... –0.3V to 6V
DIFFP, DIFFN.......................................... –0.3V to INTVCC
COMP1, COMP2, VFB1, VFB2 (Note 6)......... –0.3V to 2.7V
INTVCC Peak Output Current.................................100mA
Internal Operating Temperature Range
(Note 2).............................................. –40°C to 125°C
Storage Temperature Range................... –55°C to 125°C
Peak Package Body Temperature........................... 245°C
Pin Configuration
TOP VIEW
TEMP EXTVCC
M
L
K
J
CLKOUT
SW1
PHASMD
MODE_PLLIN
H
G
F
TRACK1 E
VFB1 D
VOUTS1
C
B
A
RUN1 SGND
GND COMP1 COMP2
SGND VFB2 TRACK2
GND
fSET SGND VOUTS2
VOUT1
GND
VOUT2
SINWTV2CC
PGOOD1
PGOOD2
RUN2
DDDIIIFFFFFFPONUT
1 2 3 4 5 6 7 8 9 10 11 12
LGA PACKAGE
144-LEAD (16mm × 16mm × 1.91mm)
TJMAX = 125°C, θJA = 7°C/W, θJCbottom = 1.5°C/W, θJCtop = 3.7°C/W, θJB + θJBA 7°C/W
θ VALUES DEFINED PER JESD 51-12
WEIGHT = 1.35g
TOP VIEW
TEMP EXTVCC
M
L
K
J
CLKOUT
SW1
PHASMD
MODE_PLLIN
H
G
F
TRACK1 E
VFB1 D
VOUTS1
C
B
A
RUN1 SGND
GND COMP1 COMP2
SGND VFB2 TRACK2
GND
fSET SGND VOUTS2
VOUT1
GND
VOUT2
SINWTV2CC
PGOOD1
PGOOD2
RUN2
DDDIIIFFFFFFPONUT
1 2 3 4 5 6 7 8 9 10 11 12
BGA PACKAGE
144-LEAD (16mm × 16mm × 2.51mm)
TJMAX = 125°C, θJA = 7°C/W, θJCbottom = 1.5°C/W, θJCtop = 3.7°C/W, θJB + θJBA 7°C/W
θ VALUES DEFINED PER JESD 51-12
WEIGHT = 1.54g
4631fb
2 For more information www.linear.com/LTM4631


Part Number LTM4631
Description Ultrathin Dual 10A or Single 20A DC/DC uModule Regulator
Maker Analog Devices
Total Page 30 Pages
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