LTM4620
Dual 13A or Single 26A
DC/DC µModule Regulator
FEATURES
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DESCRIPTION
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Complete Standalone Dual Output Power Supply
Dual 13A or Single 26A Output
Wide Input Voltage Range: 4.5V to 16V
Output Voltage Range: 0.6V to 2.5V
±1.5% Maximum Total DC Output Error
Multiphase Current Sharing with Multiple
LTM4620s Up to 100A
Differential Remote Sense Amplifier
Current Mode Control/Fast Transient Response
Adjustable Switching Frequency
Overcurrent Foldback Protection
Frequency Synchronization
Internal Temperature Monitor
Output Overvoltage Protection
SnPb or RoHS Compliant Finish
Thermally Enhanced (15mm
×
15mm
×
4.41mm) LGA
Package and (15mm
×
15mm
×
5.01mm) BGA Package
APPLICATIONS
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Telecom and Networking Equipment
Storage and ATCA Cards
Industrial Equipment
The
LTM
®
4620
is a complete dual 13A output switching
mode DC/DC power supply. Included in the package are
the switching controller, power FETs, inductors, and all
supporting components. Operating from an input voltage
range of 4.5V to 16V, the LTM4620 supports two outputs
each with an output voltage range of 0.6V to 2.5V, set by a
single external resistor. Its high efficiency design delivers
up to 13A 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 power module is
offered in a proprietary space saving and thermally
enhanced 15mm
×
15mm
×
4.41mm LGA pack-
age and 15mm
×
15mm
×
5.01mm BGA package,
with integrated top-side heat sink. The LTM4620 is avail-
able with SnPb (BGA) or RoHS compliant terminal finish.
L,
LT, LTC, LTM, Linear Technology, the Linear logo, µModule, Burst Mode, LTpowerCAD
and PolyPhase are registered trademarks of Analog Devices, Inc. All other trademarks are the
property of their respective owners.
Click to view associated TechClip Videos.
TYPICAL APPLICATION
26A, 1.2V Output DC/DC µModule
®
Regulator
INTV
CC
4.7µF
MODE_PLLIN CLKOUT INTV
CC
V
IN
120k
TEMP
RUN1
RUN2
TRACK1
5.1V*
0.1µF
TRACK2
f
SET
PHASMD
121k
* PULL-UP RESISTOR AND
ZENER ARE OPTIONAL
SGND
GND
DIFFP
DIFFN
LTM4620
5k
PGOOD
V
IN
4.5V TO 16V
10k*
EXTV
CC
PGOOD1
V
OUT1
V
OUTS1
DIFFOUT
SW1
V
FB1
V
FB2
COMP1
COMP2
V
OUTS2
V
OUT2
SW2
PGOOD2
V
OUT
1.2V AT 26A
60.4k
1.2V Efficiency vs I
OUT
90
100µF
6.3V
EFFICIENCY (%)
22µF
×
4
25V
+
470µF
6.3V
80
70
60
50
+
100µF
6.3V
PGOOD
470µF
6.3V
40
5V
IN
/500kHz
12V
IN
/500kHz
0 2 4 6 8 10 12 14 16 18 20 22 24 26
OUTPUT CURRENT (A)
4620 TA01b
4620 TA01a
4620fc
For more information
www.linear.com/LTM4620
1
LTM4620
ABSOLUTE MAXIMUM RATINGS
(Note 1)
V
IN
(Note 8).................................................–0.3V to 18V
V
SW1
, V
SW2
....................................................–1V to 18V
PGOOD1, PGOOD2, RUN1, RUN2,
INTV
CC
, EXTV
CC
.......................................... –0.3V to 6V
MODE_PLLIN, f
SET
, TRACK1, TRACK2,
DIFFOUT, PHASMD ............................... –0.3V to INTV
CC
V
OUT1
, V
OUT2
, V
OUTS1
, V
OUTS2
..................... –0.3V to 6V
DIFFP, DIFFN ......................................... –0.3V to INTV
CC
COMP1, COMP2, V
FB1
, V
FB2
(Note 6) ........ –0.3V to 2.7V
INTV
CC
Peak Output Current ................................100mA
Internal Operating Temperature Range (Note 2)
E- and I-Grade ................................... –40°C to 125°C
MP-Grade .......................................... –55°C to 125°C
Storage Temperature Range .................. –55°C to 125°C
Peak Package Body Temperature .......................... 245°C
PIN CONFIGURATION
TOP VIEW
TEMP
M
L
K
J
TOP VIEW
TEMP
M
L
K
J
EXTV
CC
EXTV
CC
V
IN
V
IN
CLKOUT
SW1
PHASMD
MODE_PLLIN
TRACK1
V
FB1
V
OUTS1
H
G
RUN1
F
SGND
GND
E
D
C
B
A
1
2
3
4
5
COMP1 COMP2
SGND V
FB2
TRACK2
f
SET
SGND V
OUTS2
GND
INTV
CC
SW2
PGOOD1
PGOOD2
RUN2
DIFFOUT
DIFFP
DIFFN
CLKOUT
SW1
PHASMD
MODE_PLLIN
TRACK1
V
FB1
V
OUTS1
H
G
RUN1
F
SGND
GND
E
D
C
B
A
COMP1 COMP2
SGND V
FB2
TRACK2
f
SET
SGND V
OUTS2
GND
INTV
CC
SW2
PGOOD1
PGOOD2
RUN2
DIFFOUT
DIFFP
DIFFN
V
OUT1
GND
6
7
8
9
V
OUT2
V
OUT1
GND
4
5
6
7
8
9
V
OUT2
10
11
12
1
2
3
10
11
12
LGA PACKAGE
144-LEAD (15mm
×
15mm
×
4.41mm)
BGA PACKAGE
144-LEAD (15mm
×
15mm
×
5.01mm)
T
JMAX
= 125°C,
θ
JA
= 7°C/W,
θ
JCbottom
= 1.5°C/W,
θ
JCtop
= 3.7°C/W,
θ
JB
+
θ
BA
≅
7°C/W
θ
VALUES DEFINED PER JESD 51-12
WEIGHT = 3.037g
T
JMAX
= 125°C,
θ
JA
= 7°C/W,
θ
JCbottom
= 1.5°C/W,
θ
JCtop
= 3.7°C/W,
θ
JB
+
θ
BA
≅
7°C/W
θ
VALUES DEFINED PER JESD 51-12
WEIGHT = 3.232g
ORDER INFORMATION
PART NUMBER
LTM4620EV#PBF
LTM4620IV#PBF
LTM4620EY#PBF
LTM4620IY#PBF
LTM4620IY
LTM4620MPY#PBF
LTM4620MPY
PAD OR BALL FINISH
Au (RoHS)
Au (RoHS)
SAC305 (RoHS)
SAC305 (RoHS)
SnPb (63/37)
SAC305 (RoHS)
SnPb (63/37)
http://www.linear.com/product/LTM4620#orderinfo
PART MARKING*
DEVICE
LTM4620V
LTM4620V
LTM4620Y
LTM4620Y
LTM4620Y
LTM4620Y
LTM4620Y
FINISH CODE
e4
e4
e1
e1
e0
e1
e0
PACKAGE
TYPE
LGA
LGA
BGA
BGA
BGA
BGA
BGA
MSL
RATING
3
3
3
3
3
3
3
TEMPERATURE RANGE
(Note 2)
–40°C to 125°C
–40°C to 125°C
–40°C to 125°C
–40°C to 125°C
–40°C to 125°C
–55°C to 125°C
–55°C to 125°C
Consult Marketing for parts specified with wider operating temperature
ranges. *Device temperature grade is indicated by a label on the shipping
container. Pad or ball finish code is per IPC/JEDEC J-STD-609.
• Terminal Finish Part Marking:
www.linear.com/leadfree
• Recommended LGA and BGA PCB Assembly and Manufacturing
Procedures:
www.linear.com/umodule/pcbassembly
• LGA and BGA Package and Tray Drawings:
www.linear.com/packaging
4620fc
2
For more information
www.linear.com/LTM4620
LTM4620
ELECTRICAL CHARACTERISTICS
SYMBOL
V
IN
V
OUT
V
OUT1(DC)
,
V
OUT2(DC)
Input Specifications
V
RUN1
, V
RUN2
I
INRUSH(VIN)
I
Q(VIN)
RUN Pin On/Off Threshold
Input Inrush Current at Start-Up
RUN Rising
I
OUT
= 0A, C
IN
= 22µF ×3, C
SS
= 0.01µF,
C
OUT
= 100µF ×3, V
OUT1
= 1.5V, V
OUT2
= 1.5V,
V
IN
= 12V
V
IN
= 12V, V
OUT
= 1.5V, Burst Mode Operation
V
IN
= 12V, V
OUT
= 1.5V, Pulse-Skipping Mode
V
IN
= 12V, V
OUT
= 1.5V, Switching Continuous
Shutdown, RUN = 0, V
IN
= 12V
V
IN
= 5V, V
OUT
= 1.5V, I
OUT
= 13A
V
IN
= 12V, V
OUT
= 1.5V, I
OUT
= 13A
V
IN
= 12V, V
OUT
= 1.5V (Notes 7, 8)
V
OUT
= 1.5V, V
IN
from 4.5V to 16V
I
OUT
= 0A for Each Output,
For Each Output, V
OUT
= 1.5V, 0A to 13A
V
IN
= 12V (Note 7)
For Each Output, I
OUT
= 0A, C
OUT
= 100µF ×3/
X7R/Ceramic, 470µF POSCAP V
IN
= 12V,
,
V
OUT
= 1.5V, Frequency = 400kHz
V
IN
= 12V, V
OUT
= 1.5V, f
SET
= 1.25V (Note 4)
400
,
C
OUT
= 100µF/X5R/Ceramic, 470µF POSCAP
V
OUT
= 1.5V, I
OUT
= 0A V
IN
= 12V
,
C
OUT
= 100µF/X5R/Ceramic, 470µF POSCAP
No Load, TRACK/SS with 0.01µF to GND,
V
IN
= 12V
Load: 0% to 50% to 0% of Full Load
C
OUT
= 22µF ×3/X5R/Ceramic, 470µF POSCAP
V
IN
= 12V, V
OUT
= 1.5V
Load: 0% to 50% to 0% of Full Load,
V
IN
= 12V, C
OUT
= 100µF, 470µF POSCAP
V
IN
= 12V, V
OUT
= 1.5V
10
5
l
l
The
l
denotes the specifications which apply over the specified internal
operating temperature range (Note 2). Specified as each individual output channel. T
A
= 25°C, V
IN
= 12V and V
RUN1
, V
RUN2
at 5V
unless otherwise noted. Per the typical application in Figure 23.
PARAMETER
Input DC Voltage
Output Voltage
Output Voltage, Total Variation with
Line and Load
(Note 8)
C
IN
= 22µF
×
3, C
OUT
= 100µF
×
1 Ceramic,
470µF POSCAP V
OUT
= 1.5V
,
CONDITIONS
l
l
l
MIN
4.5
0.6
1.477
TYP
MAX
16
2.5
UNITS
V
V
V
1.5
1.523
1.1
1.25
150
1
1.40
V
mV
A
V
RUN1HYS
, V
RUN2HYS
RUN Pin On Hysteresis
Input Supply Bias Current
5
15
65
50
4.6
1.853
0
0.01
0.5
15
13
0.025
0.75
mA
mA
mA
µA
A
A
A
%/V
%
mV
P-P
kHz
780
kHz
mV
ms
I
S(VIN)
Output Specifications
I
OUT1(DC)
, I
OUT2(DC)
ΔV
OUT1(LINE)
/V
OUT1
ΔV
OUT2(LINE)
/V
OUT2
ΔV
OUT1
/V
OUT1
ΔV
OUT2
/V
OUT2
Input Supply Current
Output Continuous Current Range
Line Regulation Accuracy
Load Regulation Accuracy
V
OUT1(AC)
, V
OUT2(AC)
Output Ripple Voltage
f
S
(Each Channel)
f
SYNC
(Each Channel)
ΔV
OUTSTART
(Each Channel)
t
START
(Each Channel)
ΔV
OUT(LS)
(Each Channel)
t
SETTLE
(Each Channel)
I
OUT(PK)
(Each Channel)
Control Section
V
FB1
, V
FB2
I
FB1
, I
FB2
V
OVL
Feedback Overvoltage Lockout
Voltage at V
FB
Pins
Output Ripple Voltage Frequency
SYNC Capture Range
Turn-On Overshoot
Turn-On Time
500
Peak Deviation for Dynamic Load
30
mV
Settling Time for Dynamic Load
Step
Output Current Limit
20
20
µs
A
I
OUT
= 0A, V
OUT
= 1.5V
(Note 6)
l
0.592
0.64
0.600
–5
0.66
0.606
–20
0.68
V
nA
V
l
4620fc
For more information
www.linear.com/LTM4620
3
LTM4620
The
l
denotes the specifications which apply over the specified internal
operating temperature range (Note 2). Specified as each individual output channel. T
A
= 25°C, V
IN
= 12V and VRUN1, VRUN2 at 5V
unless otherwise noted. Per the typical application in Figure 23.
SYMBOL
TRACK1 (I),
TRACK2 (I)
UVLO
UVLO Hysteresis
t
ON(MIN)
R
FBHI1
, R
FBHI2
V
PGOOD1
, V
PGOOD2
Low
I
PGOOD
V
PGOOD
Minimum On-Time
Resistor Between V
OUTS1
, V
OUTS2
and V
FB1
, V
FB2
Pins for Each Output
PGOOD Voltage Low
PGOOD Leakage Current
PGOOD Trip Level
I
PGOOD
= 2mA
V
PGOOD
= 5V
V
FB
with Respect to Set Output Voltage
V
FB
Ramping Negative
V
FB
Ramping Positive
6V < V
IN
< 16V
I
CC
= 0mA to 50mA
EXTV
CC
Ramping Positive
I
CC
= 20mA, V
EXTVCC
= 5V
4.5
4.8
–10
10
5
0.5
4.7
50
200
f
SET
= 1.2V
f
SET
= 0V (Note 5)
f
SET
> 2.4V, Up to INTV
CC
450
210
700
9
PHASMD = GND
PHASMD = Float
PHASMD = INTV
CC
2
500
250
780
10
250
60
90
120
0.2
1
Measured at DIFFP Input
V
DIFFP
= V
DIFFOUT
= 1.5V, I
DIFFOUT
= 100µA
5V < V
IN
< 16V
90
2
I
DIFFOUT
= 300µA
INTV
CC
– 1.4
80
3
550
290
860
11
100
5.2
2
(Note 6)
60.05
PARAMETER
Track Pin Soft-Start Pull-Up Current
Undervoltage Lockout
CONDITIONS
TRACK1 (I),TRACK2 (I) Start at 0V
V
IN
Falling
V
IN
Rising
MIN
1
TYP
1.25
3.3
3.9
0.6
90
60.4
0.1
60.75
0.3
±5
MAX
1.5
UNITS
µA
V
V
V
ns
kΩ
V
µA
%
%
V
%
V
mV
mV
kHz
kHz
kHz
µA
kΩ
Deg
Deg
Deg
V
V
V/V
kΩ
mV
dB
mA
V
ELECTRICAL CHARACTERISTICS
INTV
CC
Linear Regulator
V
INTVCC
V
INTVCC
Load Regulation
V
EXTVCC
V
EXTVCC(DROP)
V
EXTVCC(HYST)
Frequency Nominal
Frequency Low
Frequency High
f
SET
R
MODE_PLLIN
CLKOUT
Internal V
CC
Voltage
INTV
CC
Load Regulation
EXTV
CC
Switchover Voltage
EXTV
CC
Dropout
EXTV
CC
Hysteresis
Nominal Frequency
Lowest Frequency
Highest Frequency
Frequency Set Current
MODE_PLLIN Input Resistance
Phase (Relative to V
OUT1
)
Clock High Output Voltage
Clock Low Output Voltage
Gain
Input Resistance
Input Offset Voltage
Power Supply Rejection Ratio
Maximum Output Current
Maximum Output Voltage
Oscillator and Phase-Locked Loop
CLK High
CLK Low
Differential Amplifier
A
V
Differential
Amplifier
R
IN
V
OS
PSRR Differential
Amplifier
I
CL
V
OUT(MAX)
4
4620fc
For more information
www.linear.com/LTM4620
LTM4620
The
l
denotes the specifications which apply over the specified internal
operating temperature range (Note 2). Specified as each individual output channel. T
A
= 25°C, V
IN
= 12V and VRUN1, VRUN2 at 5V
unless otherwise noted. Per the typical application in Figure 23.
SYMBOL
GBW
V
TEMP
Temp Diode
TC
PARAMETER
Gain Bandwidth Product
Diode Connected PNP
Temperature Coefficient
I = 100µA
CONDITIONS
MIN
TYP
3
0.598
–2.0
MAX
UNITS
MHz
V
mV/°C
ELECTRICAL CHARACTERISTICS
Note 1:
Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and lifetime.
Note 2:
The LTM4620 is tested under pulsed load conditions such that
T
J
≈ T
A
. The LTM4620E is guaranteed to meet specifications from
0°C to 125°C internal temperature. Specifications over the –40°C to
125°C internal operating temperature range are assured by design,
characterization and correlation with statistical process controls. The
LTM4620I is guaranteed over the full –40°C to 125°C internal operating
temperature range. The LTM4620MP is tested and guaranteed over the
–55°C to 125°C operating temperature range. For output current derating
at high temperature, please refer to thermal conditions and output
current derating discussion. Note that the maximum ambient temperature
consistent with these specifications is determined by specific operating
conditions in conjunction with board layout, the rated package thermal
impedance and other environmental factors.
Note 3:
Two outputs are tested separately and the same testing condition
is applied to each output.
Note 4:
The switching frequency is programmable from 400kHz to 750kHz.
Note 5:
LTM4620 device is designed to operate from 400kHz to 750kHz
Note 6:
These parameters are tested at wafer sort.
Note 7:
See output current derating curves for different V
IN
, V
OUT
and T
A
.
Note 8:
Output current limitations. For 10V ≤ V
IN
≤ 16V, the 2.5V output
current needs to be limited to 10A/channel, switching frequency = 750kHz.
Derating curves apply. For 5V ≤ V
IN
≤ 9V, the 2.5V output current needs
to be limited to 12A/channel, switching frequency = 750kHz. Derating
curves apply. All other input and output combinations are 13A/channel
with recommended switching frequency included in the efficiency graphs.
Derating curves apply.
4620fc
For more information
www.linear.com/LTM4620
5
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