FEATURES
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LTM4613
EN55022B Compliant
36V
IN
, 15V
OUT
, 8A,
DC/DC µModule Regulator
DESCRIPTION
The
LTM
®
4613
is a complete, ultralow noise, 8A switch
mode DC/DC power supply. Included in the package are the
switching controller, power FETs, inductor and all support
components. Operating over an input voltage range of 5V
to 36V, the LTM4613 supports an output voltage range of
3.3V to 15V, set by a single external resistor. Only bulk
input and output capacitors are needed to finish the design.
High switching frequency and an adaptive on-time current
mode architecture enables a very fast transient response
to line and load changes without sacrificing stability.
The onboard input filter and noise cancellation circuits
achieve low noise coupling, thus effectively reducing
the electromagnetic interference (EMI)—see Figure 7.
Furthermore, the DC/DC µModule
®
regulator can be syn-
chronized with an external clock to reduce undesirable
frequency harmonics and allow PolyPhase
®
operation for
high load currents.
The LTM4613 is offered in 15mm
×
15mm
×
4.32mm
LGA and 15mm
×
15mm
×
4.92mm BGA packages. The
LTM4613 is available with SnPb (BGA) or RoHS compli-
ant terminal finish.
L,
LT, LTC, LTM, µModule, PolyPhase, Linear Technology, and the Linear logo are registered
trademarks and LTpowerCAD is a trademark of Linear Technology Corporation. All other
trademarks are the property of their respective owners.
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Complete Low EMI Switch Mode Power Supply
EN55022 Class B Compliant
Wide Input Voltage Range: 5V to 36V
8A Output Current
3.3V to 15V Output Voltage Range
Low Input and Output Referred Noise
Output Voltage Tracking and Margining
PLL Frequency Synchronization
2% Maximum Total DC Error
Power Good Tracks with Margining
Current Foldback Protection
Parallel/Current Sharing
Ultrafast Transient Response
Current Mode Control
Programmable Soft-Start
Output Overvoltage Protection
–55°C to 125°C Operating Temperature Range
(LTM4613MPV, LTM4613MPY)
15mm
×
15mm
×
4.32mm LGA and
15mm
×
15mm
×
4.92mm BGA Packages
SnPb (BGA) or RoHS Compliant (LGA and BGA) Finish
Telecom and Networking Equipment
Industrial and Avionic Equipment
RF Systems
APPLICATIONS
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TYPICAL APPLICATION
12V/8A Ultralow Noise µModule with 24V to 36V Input
V
IN
24V
TO 36V
CLOCK SYNC
51k
V
IN
PLLIN
V
OUT
PGOOD
RUN LTM4613
COMP
V
FB
INTV
CC
DRV
CC
FCB
f
SET
MARG0
TRACK/SS
MARG1
V
D
MPGM
SGND
PGND
V
OUT
12V
8A
Radiated Emission Scan with 24V
IN
to 12V
OUT
at 8A
70
60
SIGNAL AMPLITUDE (dB uV/m)
50
40
30
20
10
0
–10
30
226.2
422.4
613.6
814.3 1010.0
FREQUENCY (MHz)
4613 TA01b
EN55022B LIMIT
22pF
5.23k
MARGIN
CONTROL
392k
5% MARGIN
4613 TA01
C
OUT
C
IN
0.1µF
10µF
×
3
4613fd
For more information
www.linear.com/LTM4613
1
LTM4613
ABSOLUTE MAXIMUM RATINGS
(Note 1)
INTV
CC,
DRV
CC
............................................. –0.3V to 6V
V
OUT
........................................................... –0.3V to 16V
PLLIN, FCB, TRACK/SS, MPGM, MARG0,
MARG1, PGOOD ....................–0.3V to INTV
CC
+ 0.3V
RUN ............................................................. –0.3V to 5V
V
FB
, COMP ................................................ –0.3V to 2.7V
V
IN
, V
D
....................................................... –0.3V to 36V
Internal Operating Temperature Range (Note 2)
E- and I-Grades.................................. –40°C to 125°C
MP-Grade .......................................... –55°C to 125°C
Storage Temperature Range .................. –55°C to 125°C
Peak Solder Reflow Package Body Temperature..... 245°C
PIN CONFIGURATION
INTV
CC
PLLIN
TRACK/SS
RUN
COMP
MPGM
INTV
CC
PLLIN
TRACK/SS
RUN
COMP
MPGM
V
D
SGND
f
SET
MARG0
MARG1
DRV
CC
V
FB
PGOOD
SGND
NC
NC
NC
FCB
TOP VIEW
TOP VIEW
V
D
V
D
f
SET
MARG0
MARG1
DRV
CC
V
FB
PGOOD
SGND
NC
NC
NC
FCB
V
IN
A
BANK 1
B
C
D
E
PGND
BANK 2
F
G
H
J
V
OUT
K
BANK 3
L
M
V
IN
A
BANK 1
B
C
D
E
PGND
BANK 2
F
G
H
J
V
OUT
K
BANK 3
L
M
V
D
SGND
1 2 3 4 5 6 7 8 9 10 11 12
LGA PACKAGE
133-LEAD (15mm × 15mm × 4.32mm)
T
JMAX
= 125°C,
θ
JCtop
= 17°C/w,
θ
JCbottom
= 2.3°C/W,
θ
JA
= 10°C/W,
θ
JB
= 2.5°C/W,
θ
JA
DERIVED FROM 95mm
×
76mm PCB WITH 4 LAYERS
WEIGHT = 2.5g
1 2 3 4 5 6 7 8 9 10 11 12
BGA PACKAGE
133-LEAD (15mm × 15mm × 4.92mm)
T
JMAX
= 125°C,
θ
JCtop
= 17°C/w,
θ
JCbottom
= 2.3°C/W,
θ
JA
= 10°C/W,
θ
JB
= 2.5°C/W,
θ
JA
DERIVED FROM 95mm
×
76mm PCB WITH 4 LAYERS
WEIGHT = 2.7g
ORDER INFORMATION
PART NUMBER
LTM4613EV#PBF
LTM4613IV#PBF
LTM4613MPV#PBF
LTM4613EY#PBF
LTM4613IY#PBF
LTM4613IY
LTM4613MPY#PBF
LTM4613MPY
PAD OR BALL FINISH
Au (RoHS)
Au (RoHS)
Au (RoHS)
SAC305 (RoHS)
SAC305 (RoHS)
SnPb (63/37)
SAC305 (RoHS)
SnPb (63/37)
http://www.linear.com/product/LTM4613#orderinfo
PART MARKING*
DEVICE
LTM4613V
LTM4613V
LTM4613V
LTM4613Y
LTM4613Y
LTM4613Y
LTM4613Y
LTM4613Y
FINISH CODE
e4
e4
e4
e1
e1
e0
e1
e0
PACKAGE
TYPE
LGA
LGA
LGA
BGA
BGA
BGA
BGA
BGA
MSL
RATING
3
3
3
3
3
3
3
3
TEMPERATURE RANGE
(Note 2)
–40°C to 125°C
–40°C to 125°C
–55°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
• Recommended LGA and BGA PCB Assembly and Manufacturing
ranges. *Device temperature grade is indicated by a label on the shipping
Procedures:
www.linear.com/umodule/pcbassembly
container. Pad or ball finish code is per IPC/JEDEC J-STD-609.
• LGA and BGA Package and Tray Drawings:
www.linear.com/packaging
• Terminal Finish Part Marking:
www.linear.com/leadfree
2
4613fd
For more information
www.linear.com/LTM4613
LTM4613
ELECTRICAL CHARACTERISTICS
SYMBOL
V
IN(DC)
V
OUT(DC)
PARAMETER
Input DC Voltage
Output Voltage, Total Variation
with Line and Load
Undervoltage Lockout Threshold
Input Inrush Current at Start-Up
C
IN
= 10µF
×
3, C
OUT
= 47µF
×
4; FCB = 0,
V
IN
= 24V to 36V, V
OUT
= 12V
I
OUT
= 0A
I
OUT
= 0A; C
IN
= 10µF
×
3, C
OUT
= 47µF
×
4; C
SS
= 22nF
V
OUT
= 12V
V
IN
= 24V
V
IN
= 36V
V
IN
= 36V, V
OUT
= 12V, Switching Continuous, I
OUT
= 0A
V
IN
= 24V, V
OUT
= 12V, Switching Continuous, I
OUT
= 0A
Shutdown, RUN = 0, V
IN
= 36V
V
IN
= 36V, V
OUT
= 12V, I
OUT
= 8A
V
IN
= 24V, V
OUT
= 12V, I
OUT
= 8A
V
IN
= 36V, RUN > 2V, I
OUT
= 0A
4.7
0
l
The
l
denotes the specifications which apply over the full internal
operating temperature range, otherwise specifications are at T
A
= 25°C (Note 2), V
IN
= 24V, unless otherwise noted. Per Typical
Application (front page) configuration.
CONDITIONS
l
l
MIN
5
11.83
TYP
12.07
MAX
36
12.31
UNITS
V
V
Input Specifications
V
IN(UVLO)
I
INRUSH(VIN)
3.2
4.8
V
150
120
78
60
50
2.90
4.26
5
5.5
8
0.05
0.5
0.5
0.3
0.75
0.75
mA
mA
mA
mA
µA
A
A
V
A
%
%
%
I
Q(VIN)
I
S(VIN)
V
INTVCC
I
OUT(DC)
∆V
OUT(LINE)
V
OUT
∆V
OUT(LOAD)
V
OUT
V
IN(AC)
Input Supply Bias Current
Input Supply Current
Internal V
CC
Voltage
Output Specifications
Output Continuous Current Range V
IN
= 24V, V
OUT
= 12V (Note 4)
Line Regulation Accuracy
Load Regulation Accuracy
V
OUT
= 12V, FCB = 0V, V
IN
= 24V to 36V,
I
OUT
= 0A
V
OUT
= 12V, FCB = 0V, I
OUT
= 0A to 8A (Note 4)
V
IN
= 36V
V
IN
= 24V
I
OUT
= 0A,
C
IN
= 1
×
10µF X5R Ceramic and 1
×
100µF Electrolytic,
3
×
10µF X5R Ceramic on V
D
Pins
V
IN
= 24V, V
OUT
= 12V (Note 5)
I
OUT
= 0A,
C
OUT
= 1
×
10µF, 4
×
47µF X5R Ceramic
V
IN
= 24V, V
OUT
= 12V
V
IN
= 24V, V
OUT
= 12V, I
OUT
= 0A
C
OUT
= 47µF
×
4, V
OUT
= 12V, I
OUT
= 0A, C
SS
= 22nF
V
IN
= 36V
V
IN
= 24V
C
OUT
= 47µF
×
4, V
OUT
= 12V, I
OUT
= 0A, C
SS
= Open
V
IN
= 36V
V
IN
= 24V
Load: 0% to 50% to 0% of Full Load
C
OUT
= 1
×
10µF, 3
×
47µF X5R Ceramic, 1
×
47µF POSCAP
V
IN
= 24V, V
OUT
= 12V
Load: 0% to 50% to 0% of Full Load
C
OUT
= 1
×
10µF, 3
×
47µF X5R Ceramic, 1
×
47µF POSCAP
V
IN
= 24V, V
OUT
= 12V
C
OUT
= 47µF
×
4
V
IN
= 36V, V
OUT
= 12V
V
IN
= 24V, V
OUT
= 12V
l
l
Input Ripple Voltage
10
mV
P-P
mV
P-P
kHz
mV
mV
ms
ms
mV
µs
V
OUT(AC)
f
S
Output Ripple Voltage
19
600
20
20
0.3
0.3
250
100
Output Ripple Voltage Frequency
∆V
OUT(START)
Turn-On Overshoot
t
START
∆V
OUT(LS)
t
SETTLE
I
OUT(PK)
Turn-On Time
Peak Deviation for Dynamic Load
Settling Time for Dynamic Load
Step
Output Current Limit
12
12
A
A
4613fd
For more information
www.linear.com/LTM4613
3
LTM4613
ELECTRICAL CHARACTERISTICS
SYMBOL
V
FB
V
RUN
I
TRACK/SS
V
FCB
I
FCB
t
ON(MIN)
t
OFF(MIN)
R
PLLIN
I
DRVCC
R
FBHI
V
MPGM
V
MARG0
,
V
MARG1
PGOOD
∆V
FBH
∆V
FBL
∆V
FB(HYS)
V
PGL
PGOOD Upper Threshold
PGOOD Lower Threshold
PGOOD Hysteresis
PGOOD Low Voltage
V
FB
Rising
V
FB
Falling
V
FB
Returning
I
PGOOD
= 5mA
7
–7
10
–10
1.5
0.2
0.4
13
–13
%
%
%
V
PARAMETER
Voltage at V
FB
Pin
RUN Pin On/Off Threshold
Soft-Start Charging Current
Forced Continuous Threshold
Forced Continuous Pin Current
Minimum On-Time
Minimum Off-Time
PLLIN Input Resistor
Current into DRV
CC
Pin
Resistor Between V
OUT
and V
FB
Pins
Margin Reference Voltage
MARG0, MARG1 Voltage
Thresholds
V
OUT
= 12V, I
OUT
= 0A, DRV
CC
= 5V
99.5
V
FCB
= 0V
(Note 3)
(Note 3)
V
TRACK/SS
= 0V
Control Section
I
OUT
= 0A, V
OUT
= 12V
l
The
l
denotes the specifications which apply over the full internal
operating temperature range, otherwise specifications are at T
A
= 25°C (Note 2), V
IN
= 24V, unless otherwise noted. Per Typical
Application (front page) configuration.
CONDITIONS
MIN
0.591
1
–1
0.57
TYP
0.6
1.5
–1.5
0.6
–1
50
250
50
22
100
1.18
1.4
30
100.5
MAX
0.609
1.9
–2
0.63
–2
100
400
UNITS
V
V
µA
V
µA
ns
ns
kΩ
mA
kΩ
V
V
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 LTM4613 is tested under pulsed load conditions such that
T
J
≈ T
A
. The LTM4613E is guaranteed to meet performance specifications
over the 0°C to 125°C internal operating temperature range. Specifications
over the –40°C to 125°C internal operating temperature range are assured
by design, characterization and correlation with statistical process
controls. The LTM4613I is guaranteed to meet specifications over the
–40°C to 125°C internal operating temperature range. The LTM4613MP
is guaranteed and tested over the full –55°C to 125°C internal operating
temperature range. 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
resistance and other environmental factors.
Note 3:
100% tested at die level only.
Note 4:
See the Output Current Derating curves for different V
IN
, V
OUT
and T
A
.
Note 5:
Guaranteed by design.
4
4613fd
For more information
www.linear.com/LTM4613
LTM4613
TYPICAL PERFORMANCE CHARACTERISTICS
(Refer to Figure 18)
Efficiency vs Load Current with
3.3V
OUT
(FCB = 0)
100
95
90
EFFICIENCY (%)
EFFICIENCY (%)
85
80
75
70
65
60
0
1
2
5V
IN
, 3.3V
OUT
12V
IN
, 3.3V
OUT
24V
IN
, 3.3V
OUT
36V
IN
, 3.3V
OUT
4
5
3
6
LOAD CURRENT (A)
7
8
100
95
90
85
80
75
70
65
60
0
1
2
12V
IN
, 5V
OUT
24V
IN
, 5V
OUT
36V
IN
, 5V
OUT
4
5
3
6
LOAD CURRENT (A)
7
8
EFFICIENCY (%)
Efficiency vs Load Current with
5V
OUT
(FCB = 0)
100
95
90
85
80
75
70
65
60
Efficiency vs Load Current with
12V
OUT
(FCB = 0)
20V
IN
, 12V
OUT
24V
IN
, 12V
OUT
28V
IN
, 12V
OUT
36V
IN
, 12V
OUT
0
1
2
4
5
3
6
LOAD CURRENT (A)
7
8
4613 G01
4613 G02
4613 G03
Efficiency vs Load Current with
15V
OUT
(FCB = 0)
100
95
90
EFFICIENCY (%)
85
80
75
70
65
60
0
1
2
24V
IN
, 15V
OUT
28V
IN
, 15V
OUT
32V
IN
, 15V
OUT
36V
IN
, 15V
OUT
4
5
3
6
LOAD CURRENT (A)
7
8
I
OUT
5A/DIV
V
OUT
100mV/DIV
AC
Transient Response from 12V
IN
to 3.3V
OUT
I
OUT
5A/DIV
V
OUT
100mV/DIV
AC
100µs/DIV
LOAD STEP: 0A TO 4A
C
OUT
= 1
×
47µF POSCAP
1
×
10µF CERAMIC CAPACITOR AND
3
×
47µF CERAMIC CAPACITORS
4613 G05
Transient Response from 12V
IN
to 5V
OUT
100µs/DIV
LOAD STEP: 0A TO 4A
C
OUT
= 1
×
47µF POSCAP
1
×
10µF CERAMIC CAPACITOR AND
3
×
47µF CERAMIC CAPACITORS
4613 G06
4613 G04
Transient Response from 24V
IN
to 12V
OUT
I
OUT
5A/DIV
V
OUT
200mV/DIV
AC
100µs/DIV
LOAD STEP: 0A TO 4A
C
OUT
= 1
×
47µF POSCAP
1
×
10µF CERAMIC CAPACITOR AND
3
×
47µF CERAMIC CAPACITORS
4613 G07
Start-Up with 24V
IN
to 12V
OUT
at I
OUT
= 0A
I
IN
1A/DIV
Start-Up with 24V
IN
to 12V
OUT
at
I
OUT
= 8A
I
IN
200mA/DIV
V
OUT
5V/DIV
10ms/DIV
SOFT-START CAPACITOR: 0.1µF
C
IN
= 2
×
10µF CERAMIC CAPACITORS AND
1
×
100µF OS-CON CAPACITOR
4613 G08
V
OUT
5V/DIV
10ms/DIV
SOFT-START CAPACITOR: 0.1µF
C
IN
= 2
×
10µF CERAMIC CAPACITORS AND
1
×
100µF OS-CON CAPACITOR
4613 G09
4613fd
For more information
www.linear.com/LTM4613
5
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