LTM4630A
Dual 18A or Single 36A
DC/DC Module Regulator
FEATURES DESCRIPTION
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Dual 18A or Single 36A Output The LTM 4630A is a dual 18A or single 36A output switch-
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ing mode step-down DC/DC Module (micromodule)
Input Voltage Range: 4.5V to 18V (after date code
regulator with wider V range and higher efficiency
1720*)
OUT
n than LTM4630. Included in the package are the switch-
Output Voltage Range: 0.6V to 8V (after date code
ing controllers, power FETs, inductors and all supporting
1720*)
components. Operating from an input voltage range of
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1.5% Maximum Total DC Output Error Over Line,
4.5V to 18V, the LTM4630A supports two outputs each
Load and Temperature
with an output voltage range of 0.6V to 8V, each set by a
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Higher Light Load Efficiency and Wider V Range
OUT
single external resistor. Its high efficiency design delivers
Than LTM4630
up to 18A continuous current for each output. Only a few
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Differential Remote Sense Amplifier
input and output capacitors are needed. The LTM4630A
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Current Mode Control/Fast Transient Response
is pin compatible with the LTM4620 and LTM4620A (dual
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Multiphase Parallel Current Sharing Up to 144A
13A, single 26A) and the LTM4630 (dual 18A, single 36A).
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Internal Temperature Monitor
The device supports frequency synchronization, multi-
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Pin Compatible with the LTM4620A (Dual 13A,
phase operation, Burst Mode operation and output voltage
Single 26A) and LTM4630 (Dual 18A, Single 36A)
tracking for supply rail sequencing and has an onboard
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Adjustable Switching Frequency or Synchronization
temperature diode for device temperature monitoring. High
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Overcurrent Foldback Protection
switching frequency and a current mode architecture enable
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Selectable Burst Mode Operation, Pulse Skipping
a very fast transient response to line and load changes
Mode Operation
without sacrificing stability.
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Soft-Start/Voltage Tracking
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Fault protection features include overvoltage and
Output Overvoltage Protection
n overcurrent protection. The LTM4630A is offered in 16mm
16mm 16mm 4.41mm LGA and 16mm 16mm
16mm 4.41mm LGA and 16mm 16mm 5.01mm
5.01mm BGA Packages
BGA packages.
APPLICATIONS
*Maximum V =15V and V =5.3V with date code before 1720.
IN OUT
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Telecom and Networking Equipment All registered trademarks and trademarks are the property of their respective owners. Protected
by U.S. Patents, including 5481178, 5705919, 5929620, 6100678, 6144194, 6177787, 6304066
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Storage and ATCA Cards
and 6580258. Other patents pending.
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Industrial Equipment
TYPICAL APPLICATION
36A, 1.2V Output DC/DC Module Regulator 1.2V and 3.3V
OUT OUT
10k Efficiency vs I
OUT
INTV PGOOD
CC
100
4.7F
PGOOD2
INTV PGOOD1
CC
V 95
IN
V
V V OUT
IN OUT1
4.5V TO 15V
22F +
100F 470F
V
25V 120k OUTS1 90
6.3V 6.3V
4
TEMP DIFFOUT
85
TRACK1 V
FB1
TRACK2
V
FB2
60.4k
80
LTM4630A
0.1F COMP1
f
SET
COMP2
75
75k
12 V , 1.2V , 300kHz
IN OUT
PINS UNUSED IN V
OUT2
RUN1 12 V , 3.3V , 600kHz
IN OUT
+
70
THIS APPLICATION: 100F
DIFFP 470F
5 V , 1.2V , 300kHz
IN OUT
RUN2
CLKOUT 6.3V
6.3V 5 V , 3.3V , 500kHz
IN OUT
PHASMD DIFFN
EXTV
CC 65
SW1
SGND GND MODE_PLLIN 0 2 4 6 8 10 12 14 16 18
SW2
4630A TA01a LOAD CURRENT (A)
V
OUTS2
4630A TA01b
4630afb
1
For more information www.linear.com/LTM4630A
EFFICIENCY (%)LTM4630A
ABSOLUTE MAXIMUM RATINGS PIN CONFIGURATION
(Note 1)
DIFFP, DIFFN ......................................... 0.3V to INTV
CC
V (Note 8) ................................................ 0.3V to 20V
IN
COMP1, COMP2, V , V (Note 6) ........ 0.3V to 2.7V
FB1 FB2
V , V ....................................................1V to 20V
SW1 SW2
INTV Peak Output Current ................................100mA
CC
PGOOD1, PGOOD2, RUN1, RUN2,
Internal Operating Temperature Range
INTV , EXTV .......................................... 0.3V to 6V
CC CC
(Note 2) ............................................. 40C to 125C
MODE_PLLIN, f , TRACK1, TRACK2,
SET
Storage Temperature Range .................. 55C to 125C
DIFFOUT, PHASMD ............................... 0.3V to INTV
CC
Peak Package Body Temperature .......................... 245C
V , V , V , V (Note 6) ...... 0.3V to 10V
OUT1 OUT2 OUTS1 OUTS2
TOP VIEW TOP VIEW
TEMP EXTV
TEMP EXTV CC
CC
M M
L L
V
IN
K K
J J
H INTV H INTV
CC CC
CLKOUT CLKOUT
SW2 SW2
SW1 SW1
G G PGOOD1
PGOOD1
PGOOD2
PGOOD2 PHASMD RUN1 SGND
PHASMD RUN1 SGND
RUN2
RUN2
F F
MODE_PLLIN
MODE_PLLIN
DIFFOUT
DIFFOUT
GND COMP1 COMP2 GND COMP1 COMP2
DIFFP DIFFP
E E
DIFFN
DIFFN
TRACK1 TRACK1
V
V SGND TRACK2 GND
SGND FB2 TRACK2 GND FB2
V V
FB1
FB1
D D
V
V f
f SGND OUTS2 SGND OUTS2
SET SET
C
C
V V
OUTS1
OUTS1
B
B
V V V
OUT1 OUT2
GND OUT2 GND
A
A
1 2 3 4 5 6 7 8 9 10 11 12 1 2 3 4 5 6 7 8 9 10 11 12
BGA PACKAGE
LGA PACKAGE
144-LEAD (16mm 16mm 4.41mm) 144-LEAD (16mm 16mm 5.01mm)
T = 125C, = 7C/W, = 1.5C/W, = 3.7C/W, + 7C/W
T = 125C, = 7C/W, = 1.5C/W, = 3.7C/W, + 7C/W
JMAX JA JCbottom JCtop JB JBA JMAX JA JCbottom JCtop JB JBA
VALUES DEFINED PER JESD51-12
VALUES DEFINED PER JESD51-12
WEIGHT = 3.2g
WEIGHT = 3.39g
ORDER INFORMATION