LTM4606
Ultralow EMI 28V
IN
, 6A
DC/DC µModule Regulator
FeaTures
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DescripTion
The
LTM
®
4606
is a complete EN55022 Class B certified
noise high voltage 6A switching mode DC/DC power supply.
Included in the package are the switching controller, power
FETs, inductor, and all support components. The on-board
input filter and noise cancellation circuits achieve low noise
operation, thus effectively reducing the electromagnetic
interference (EMI). Operating over an input voltage range
of 4.5V to 28V, the LTM4606 supports an output voltage
range of 0.6V to 5V, set by a single resistor. This high ef-
ficiency design delivers 6A continuous current (8A peak).
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
device supports output voltage tracking and output volt-
age margining.
Furthermore, the µModule
®
regulator can be synchronized
with an external clock for reducing undesirable frequency
harmonics and allows PolyPhase
®
operation for high load
currents.
The LTM4606 is offered in space saving 15mm
×
15mm
×
2.82mm LGA and 15mm
×
15mm
×
3.42mm BGA pack-
ages. The LTM4606 is available with SnPb (BGA) or RoHS
compliant terminal finish.
L,
LT, LTC, LTM, µModule, PolyPhase, Linear Technology, the Linear logo 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, 6304066, 6476589, 6580258, 6677210, 6774611, 8163643.
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Complete Low EMI Switch Mode Power Supply
Wide Input Voltage Range: 4.5V to 28V
6A DC Typical, 8A Peak Output Current
0.6V to 5V Output Voltage Range
EN55022 Class B Certified
Output Voltage Tracking and Margining
PLL Frequency Synchronization
±1.75% Total DC Error
Power Good Output
Current Foldback Protection (Disabled at Start-Up)
Parallel/Current Sharing
Current Mode Control
Up to 93% Efficiency at 5V
IN
, 3.3V
OUT
Programmable Soft-Start
Output Overvoltage Protection
–55°C to 125°C Operating Temperature Range
(LTM4606MP)
SnPb or RoHS Compliant Finish
15mm
×
15mm
×
2.82mm LGA Package
15mm
×
15mm
×
3.42mm BGA Package
applicaTions
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ASICs or FPGA Transceivers
Telecom, Servers and Networking Equipment
Industrial Equipment
RF Equipment
Typical applicaTion
Ultralow Noise 2.5V/6A Power Supply with 4.5V to 28V Input
4.5V TO 28V
V
IN
PLLIN
V
OUT
PGOOD
RUN LTM4606
COMP
INTV
CC
DRV
CC
f
SET
TRACK/SS
V
D
SGND
V
FB
FCB
MARG0
MARG1
MPGM
PGND
CLOCK SYNC
2.5V AT 6A
47pF
R
FB
19.1k
MARGIN
CONTROL
392k
5% MARGIN
4606 TA01a
Radiated Emission Scan at 12V
IN
, 2.5V
OUT
/6A
50
40
SIGNAL AMPLITUDE (dBµV/m)
30
20
10
0
–10
–20
–30
30
226.2
422.4
618.6
814.8
1010
128.1
324.3
520.5
716.7
912.9
FREQUENCY (MHz)
4606 TA01b
ON/OFF
C
IN
10µF
35V
CERAMIC
x2
C
OUT
TRACK/SS
CONTROL
10µF
35V
4606fd
For more information
www.linear.com/LTM4606
1
LTM4606
absoluTe MaxiMuM raTings
(Note 1)
DRV
CC
, V
OUT
................................................ –0.3V to 6V
PLLIN, FCB, TRACK/SS, MPGM, MARG0,
MARG1, PGOOD, RUN ..............–0.3V to INTV
CC
+ 0.3V
V
FB
, COMP ................................................ –0.3V to 2.7V
V
IN
, V
D
....................................................... –0.3V to 28V
Internal Operating Temperature Range (Note 2)
E and I Grades ................................... –40°C to 125°C
MP Grade ........................................... –55°C to 125°C
Junction Temperature ........................................... 125°C
Storage Temperature Range .................. –55°C to 125°C
pin conFiguraTion
PLLIN
TRACK/SS
RUN
COMP
MPGM
PLLIN
TRACK/SS
RUN
COMP
MPGM
V
D
SGND
PGND
BANK 2
f
SET
MARG0
MARG1
DRV
CC
V
FB
PGOOD
SGND
NC
NC
NC
FCB
TOP VIEW
INTV
CC
TOP VIEW
INTV
CC
f
SET
MARG0
MARG1
DRV
CC
V
FB
PGOOD
SGND
NC
NC
NC
FCB
V
IN
BANK 1
V
OUT
BANK 3
V
IN
BANK 1
V
D
SGND
PGND
BANK 2
V
OUT
BANK 3
BGA PACKAGE
133-LEAD (15mm × 15mm × 3.42mm)
T
JMAX
= 125°C,
θ
JA
= 15°C/W,
θ
JCbottom
= 6°C/W,
θ
JCtop
= 16°C/W
θ
JA
DERIVED FROM 95mm
×
76mm PCB WITH 4 LAYERS
WEIGHT = 1.9g
LGA PACKAGE
133-LEAD (15mm × 15mm × 2.82mm)
T
JMAX
= 125°C,
θ
JA
= 15°C/W,
θ
JCbottom
= 6°C/W,
θ
JCtop
= 16°C/W
θ
JA
DERIVED FROM 95mm
×
76mm PCB WITH 4 LAYERS
WEIGHT = 1.7g
orDer inForMaTion
PART NUMBER
LTM4606EV#PBF
LTM4606IV#PBF
LTM4606MPV#PBF
LTM4606EY#PBF
LTM4606IY#PBF
LTM4606IY
LTM4606MPY#PBF
LTM4606MPY
PAD OR BALL FINISH
Au (RoHS)
Au (RoHS)
Au (RoHS)
SAC305 (RoHS)
SAC305 (RoHS)
SnPb (63/37)
SAC305 (RoHS)
SnPb (63/37)
PART MARKING*
DEVICE
LTM4606V
LTM4606V
LTM4606V
LTM4606Y
LTM4606Y
LTM4606Y
LTM4606Y
LTM4606Y
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
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
4606fd
2
For more information
www.linear.com/LTM4606
LTM4606
elecTrical characTerisTics
SYMBOL
V
IN(DC)
V
OUT(DC)
Input Specifications
V
IN(UVLO)
I
INRUSH(VIN)
Undervoltage Lockout Threshold
Input Inrush Current at Start-Up
I
OUT
= 0A
I
OUT
= 0A, C
IN
= 10µF x2, C
OUT
= 200µF
,
V
OUT
= 1.5V
V
IN
= 5V
V
IN
= 12V
V
IN
= 5V, V
OUT
= 1.5V, Switching Continuous
V
IN
= 12V, V
OUT
= 1.5V, Switching Continuous
Shutdown, RUN = 0, V
IN
= 12V
V
IN
= 12V, V
OUT
= 1.5V, I
OUT
= 6A
V
IN
= 5V, V
OUT
= 1.5V, I
OUT
= 6A
No Load
V
IN
= 12V, V
OUT
= 1.5V (Note 4)
V
OUT
= 1.5V, FCB = 0V, V
IN
= 4.5V to 28V,
I
OUT
= 0A
V
OUT
= 1.5V, FCB = 0V, I
OUT
= 0A to 6A
V
IN
= 12V (Note 4)
I
OUT
= 0A, C
IN
= 10µF X5R Ceramic x3 and
100µF Electrolytic
V
IN
= 5V, V
OUT
= 1.5V
V
IN
= 12V, V
OUT
= 1.5V
I
OUT
= 0A, C
OUT
= 22µF X5R Ceramic x3 and
100µF X5R Ceramic
V
IN
= 5V, V
OUT
= 1.5V
V
IN
= 12V, V
OUT
= 1.5V
I
OUT
= 5A, V
IN
= 12V, V
OUT
= 1.5V
C
OUT
= 200µF V
OUT
= 1.5V, I
OUT
= 0A,
,
TRACK/SS = 10nF
V
IN
= 12V
V
IN
= 5V
C
OUT
= 200µF; V
OUT
= 1.5V, TRACK/SS = Open
I
OUT
= 1A Resistive Load
V
IN
= 5V
V
IN
= 12V
Load: 0% to 50% to 0% of Full Load
C
OUT
= 22µF Ceramic, 470µF x2
V
IN
= 12V
V
OUT
= 1.5V
l
The
l
denotes the specifications which apply over the specified internal
operating temperature range, otherwise specifications are at T
A
= 25°C (Note 2). V
IN
= 12V, unless otherwise noted. Per typical
application (front page) configuration, R
FB
= 40.2k.
PARAMETER
Input DC Voltage
Output Voltage, Total Variation with
Line and Load
C
IN
= 10µF x2, C
OUT
= 200µF; FCB = 0
V
IN
= 5V to 28V, I
OUT
= 0A to 6A, (Note 4)
CONDITIONS
l
l
MIN
4.5
1.474
TYP
1.5
MAX
28
1.526
UNITS
V
V
3.2
4
V
0.6
0.7
27
25
22
0.96
2.18
4.7
0
0.05
5
5.3
6
0.3
A
A
mA
mA
µA
A
A
V
A
%
I
Q(VIN)
I
S(VIN)
INTV
CC
I
OUT(DC)
DV
OUT(LINE)/
V
OUT
DV
OUT(LOAD)/
V
OUT
V
IN(AC)
Input Supply Bias Current
Input Supply Current
V
IN
= 12V, RUN > 2V
Output Continuous Current Range
Line Regulation Accuracy
Load Regulation Accuracy
Input Ripple Voltage
Output Specifications
l
0.3
%
2
3
mV
P-P
mV
P-P
mV
P-P
mV
P-P
kHz
V
OUT(AC)
Output Ripple Voltage
8
11
900
f
S
DV
OUT(START)
Output Ripple Voltage Frequency
Turn-On Overshoot
20
20
mV
mV
t
START
Turn-On Time
0.5
0.5
35
ms
ms
mV
DV
OUT(LS)
Peak Deviation for Dynamic Load
t
SETTLE
I
OUT(PK)
Settling Time for Dynamic Load Step
Load: 0% to 50% to 0% of Full Load,
V
IN
= 12V
Output Current Limit
C
OUT
= 200µF
V
IN
= 5V, V
OUT
= 1.5V
V
IN
= 12V, V
OUT
= 1.5V
25
µs
10
10
A
A
4606fd
For more information
www.linear.com/LTM4606
3
LTM4606
elecTrical characTerisTics
SYMBOL
Control Section
V
FB
V
RUN
I
TRACK/ SS
V
FCB
I
FCB
t
ON(MIN)
t
OFF(MIN)
R
PLLIN
I
DRVCC
R
FBHI
V
RUN(MAX)
Margin Section
V
MPGM
V
MARG0
, V
MARG1
PGOOD
DV
FBH
DV
FBL
DV
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
0.15
0.4
13
–13
%
%
%
V
Margin Reference Voltage
MARG0, MARG1 Voltage Threshold
1.18
1.4
V
V
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
Maximum RUN Pin Voltage
5.1V Zener Clamp
V
OUT
= 1.5V, I
OUT
= 1A, DRV
CC
= 5V
60.098
V
FCB
= 0V
(Note 3)
(Note 3)
V
TRACK/SS
= 0V
I
OUT
= 0A, V
OUT
= 1.5V
l
The
l
denotes the specifications which apply over the specified internal
operating temperature range, otherwise specifications are at T
A
= 25°C (Note 2). V
IN
= 12V, unless otherwise noted. Per typical
application (front page) configuration, R
FB
= 40.2k.
PARAMETER
CONDITIONS
MIN
0.591
1
–1
0.57
TYP
0.6
1.5
–1.5
0.6
–1
50
250
50
15
60.4
5
25
60.702
MAX
0.609
1.9
–2
0.63
–2
100
400
UNITS
V
V
µA
V
µA
ns
ns
kW
mA
kW
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 LTM4606E 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 LTM4606I is guaranteed to meet specifications over the
–40°C to 125°C internal operating temperature range. The LTM4606MP
is guaranteed and tested over the –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 output current derating curves for different V
IN
, V
OUT
and T
A
.
4606fd
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For more information
www.linear.com/LTM4606
LTM4606
Typical perForMance characTerisTics
100
Efficiency vs Load Current with
5V
IN
(FCB = 0)
100
Efficiency vs Load Current with
12V
IN
(FCB = 0)
100
Efficiency vs Load Current with
24V
IN
(FCB = 0)
90
EFFICIENCY (%)
EFFICIENCY (%)
90
EFFICIENCY (%)
1.2V
OUT
1.5V
OUT
2.5V
OUT
3.3V
OUT
5V
OUT
0
1
2
3
4
LOAD CURRENT (A)
5
6
4606 G02
90
80
80
80
70
0.6V
OUT
1.2V
OUT
1.8V
OUT
2.5V
OUT
3.3V
OUT
0
1
2
3
4
LOAD CURRENT (A)
5
6
4606 G01
70
70
60
60
60
50
50
50
2.5V
OUT
3.3V
OUT
5V
OUT
0
1
2
3
4
LOAD CURRENT (A)
5
6
4606 G03
1.2V Transient Response
1.5V Transient Response
1.8V Transient Response
I
OUT
2A/DIV
V
OUT
50mV/DIV
50µs/DIV
1.2V AT 3.5A/µs LOAD STEP
C
OUT
= 2× 22µF 10V CERAMIC
,
1× 100µF 6.3V CERAMIC
,
4606 G04
I
OUT
2A/DIV
V
OUT
50mV/DIV
50µs/DIV
1.5V AT 3.5A/µs LOAD STEP
C
OUT
= 2× 22µF 10V CERAMIC
,
1× 100µF 6.3V CERAMIC
,
4606 G05
I
OUT
2A/DIV
V
OUT
50mV/DIV
50µs/DIV
1.8V AT 3.5A/µs LOAD STEP
C
OUT
= 2× 22µF 10V CERAMIC
,
1× 100µF 6.3V CERAMIC
,
4606 G06
2.5V Transient Response
3.3V Transient Response
V
OUT
0.5V/DIV
–55°C, Start-Up, I
OUT
= 0A
I
OUT
2A/DIV
V
OUT
50mV/DIV
50µs/DIV
2.5V AT 3.5A/µs LOAD STEP
C
OUT
= 2× 22µF 10V CERAMIC
,
1× 100µF 6.3V CERAMIC
,
4606 G07
I
OUT
2A/DIV
V
OUT
100mV/DIV
50µs/DIV
3.3V AT 3.5A/µs LOAD STEP
C
OUT
= 2× 22µF 10V CERAMIC
,
1× 100µF 6.3V CERAMIC
,
4606 G08
I
IN
0.5A/DIV
1ms/DIV
V
IN
= 12V
V
OUT
= 1.5V
,
C
OUT
= 2× 22µF 10V CERAMIC
1× 100µF 6.3V CERAMIC
,
SOFT-START = 3.9nF
4606 G09
4606fd
For more information
www.linear.com/LTM4606
5
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