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 a space saving and thermally
enhanced 15mm
×
15mm
×
2.8mm LGA package, which
enables utilization of unused space on the bottom of
PC boards for high density point of load regulation. The
LTM4606 is Pb-free and RoHS compliant.
n
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
Ultrafast Transient Response
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
(LTM4606MPV)
Small Surface Mount Footprint, Low Profile Package
(15mm
×
15mm
×
2.8mm)
ASICs or FPGA Transceivers
Telecom, Servers and Networking Equipment
Industrial Equipment
RF Equipment
applicaTions
n
n
n
n
L,
LT, LTC, LTM, Linear Technology, the Linear logo, µModule and PolyPhase are registered
trademarks of Linear Technology Corporation. All other trademarks are the property of their
respective owners.
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
4606fb
1
LTM4606
absoluTe MaxiMuM raTings
(Note 1)
pin conFiguraTion
TOP VIEW
f
SET
MARG0
MARG1
DRV
CC
V
FB
PGOOD
SGND
NC
NC
NC
FCB
MPGM
COMP
RUN
TRACK/SS
PLLIN
INTV
CC
12
11
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 .................. –45°C to 125°C
SGND
V
D
10
9
8
7
6
5
4
3
2
1
A
B
C
D
E
F
G
H
J
K
L
M
V
IN
BANK 1
PGND
BANK 2
V
OUT
BANK 3
LGA PACKAGE
133-LEAD (15mm × 15mm × 2.8mm)
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
LEAD FREE FINISH
LTM4606EV#PBF
LTM4606IV#PBF
LTM4606MPV#PBF
TRAY
LTM4606EV#PBF
LTM4606IV#PBF
LTM4606MPV#PBF
PART MARKING*
LTM4606V
LTM4606V
LTM4606MPV
PACKAGE DESCRIPTION
133-Lead (15mm
×
15mm
×
2.8mm) LGA
133-Lead (15mm
×
15mm
×
2.8mm) LGA
133-Lead (15mm
×
15mm
×
2.8mm) LGA
TEMPERATURE RANGE
–40°C to 125°C
–40°C to 125°C
–55°C to 125°C
Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container.
For more information on lead free part marking, go to:
http://www.linear.com/leadfree/
This product is only offered in trays. For more information go to:
http://www.linear.com/packaging/
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.
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
3.2
4
V
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
elecTrical characTerisTics
MIN
4.5
1.474
TYP
1.5
MAX
28
1.526
UNITS
V
V
0.6
0.7
A
A
4606fb
2
LTM4606
elecTrical characTerisTics
SYMBOL
I
Q(VIN)
I
S(VIN)
INTV
CC
I
OUT(DC)
DV
OUT(LINE)/
V
OUT
DV
OUT(LOAD)/
V
OUT
V
IN(AC)
PARAMETER
Input Supply Bias Current
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.
CONDITIONS
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
,
V
IN
= 12V
V
IN
= 5V
C
OUT
= 200µF; V
OUT
= 1.5V, 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
MIN
TYP
27
25
22
0.96
2.18
MAX
UNITS
mA
mA
µA
A
A
Input Supply Current
V
IN
= 12V, RUN > 2V
Output Continuous Current Range
Line Regulation Accuracy
Load Regulation Accuracy
Input Ripple Voltage
4.7
0
5
5.3
6
V
A
%
Output Specifications
0.05
0.3
l
0.3
%
2
3
mV
P-P
mV
P-P
mV
P-P
mV
P-P
kHz
mV
mV
V
OUT(AC)
Output Ripple Voltage
8
11
900
20
20
f
S
DV
OUT(START)
t
START
Output Ripple Voltage Frequency
Turn-On Overshoot,
TRACK/SS = 10nF
Turn-On Time, TRACK/SS = Open
0.5
0.5
35
ms
ms
mV
DV
OUT(LS)
Peak Deviation for Dynamic Load
t
SETTLE
I
OUT(PK)
Control Section
V
FB
V
RUN
I
SS / TRACK
V
FCB
I
FCB
t
ON(MIN)
t
OFF(MIN)
R
PLLIN
Settling Time for Dynamic Load Step Load: 0% to 50% to 0% of Full Load,
V
IN
= 12V
V
IN
= 12V
Output Current Limit
C
OUT
= 200µF
V
IN
= 5V, V
OUT
= 1.5V
V
IN
= 12V, V
OUT
= 1.5V
I
OUT
= 0A, V
OUT
= 1.5V
V
SS/TRACK
= 0V
V
FCB
= 0V
(Note 3)
(Note 3)
l
25
µs
10
10
0.591
1
–1
0.57
0.6
1.5
–1.5
0.6
–1
50
250
50
0.609
1.9
–2
0.63
–2
100
400
A
A
V
V
µA
V
µA
ns
ns
kW
4606fb
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
3
LTM4606
elecTrical characTerisTics
SYMBOL
I
DRVCC
R
FBHI
RUN
MAX
Margin Section
MPGM
MARG0, 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 Sets a
Current
Voltage Thresholds
1.18
1.4
V
V
PARAMETER
Current into DRV
CC
Pin
Resistor Between V
OUT
and V
FB
Pins
Volts From RUN to GND Maximum
5.1V Zener Clamp
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.
CONDITIONS
V
OUT
= 1.5V, I
OUT
= 1A
60.098
MIN
TYP
15
60.4
5
MAX
25
60.702
UNITS
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
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