LTM4653
EN55022B Compliant 58V, 4A
Step-Down DC/DC
μModule
Regulator
FEATURES
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DESCRIPTION
The
LTM
®
4653
is an ultralow noise 58V, 4A DC/DC step-
down μModule
®
regulator designed to meet the radiated
emissions requirements of EN55022. Conducted emis-
sion requirements can be met by adding standard filter
components. Included in the package are the switching
controller, power MOSFETs, inductor, filters and support
components.
Operating over an input voltage range of 3.1V to 58V, the
LTM4653 supports an output voltage range of 0.5V to
94% of V
IN
, and a switching frequency range of 250kHz
to 3MHz (400kHz default), each set by a single resistor.
For high load currents, the LTM4653 can be paralleled in
PolyPhase
®
operation and synchronized to an external
clock. Only the bulk input and output filter capacitors are
needed to finish the design.
The LTM4653 is offered in a 15mm
×
9mm
×
5.01mm
BGA package with SnPb or RoHS compliant terminal finish.
All registered trademarks and trademarks are the property of their respective owners. Protected
by U.S. Patents, including 5481178, 5705919, 5847554, 6580258.
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Complete Low EMI Switch Mode Power Supply
EN55022 Class B Compliant
Wide Input Voltage Range: 3.1V to 58V
Up to 4A Output Current
Output Voltage Range: 0.5V ≤ V
OUT
≤ 0.94 • V
IN
±1.67% Total DC Output Voltage Error Over Line,
Load and Temperature (–40°C to 125°C)
Parallel and Current Share with Multiple LTM4653s
Analog Output Current Indicator
Programmable Input Voltage Limiting
Constant-Frequency Current Mode Control
Power Good Indicator and Programmable Soft-Start
Overcurrent/Overvoltage/Overtemperature Protection
15mm × 9mm × 5.01mm BGA Package
Avionics, Industrial Control and Test Equipment
Video, Imaging and Instrumentation
48V Telecom and Network Power Supplies
RF Systems
APPLICATIONS
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TYPICAL APPLICATION
4A, 24V Output Low EMI DC/DC μModule Regulator
with Analog Output Current Indicator
V
IN
28V TO 58V
I
OUT
4.7 F
V
IN
SV
IN
V
D
4.7 F
RUN
INTV
CC
VINREG
10nF
499
124k
COMPa
LTM4653
IMONa
IMONb
f
SET
GND
ISETa ISETb
4653 TA01a
Radiated Emission Scan in a 10m Chamber
LTM4653 Delivering 24V
OUT
at 3.5A, from 48V
IN
24V
OUT
,
UP TO 4A
AMPLITUDE (dBµV/m)
70
60
50
40
30
20
10
0
–10
30
130
230
330
[1] HORIZONTAL
[2] VERTICAL
QPK LIMIT
+ FORMAL
730
630
430
530
FREQUENCY (MHz)
830
930 1000
4653 TA01b
V
OUT
V
OSNS
LOAD
SGND
PGND
MEAS DIST 10m
SPEC DIST 10m
10µF
×2
ANALOG OUTPUT
CURRENT INDICATOR
V
IMON
= 0.25 • I
OUT
PINS NOT USED IN
THIS CIRCUIT:
CLKIN, PGOOD, COMPb
PGDFB, SW, EXTV
CC
TEMP
+
, TEMP
–
, NC
481k
Document Feedback
For more information
www.analog.com
1
Rev 0
LTM4653
ABSOLUTE MAXIMUM RATINGS
(Note 1) (All Voltages Relative to V
OUT–
Unless Otherwise Indicated)
PIN CONFIGURATION
1
A
B
C
D
E
F
G
H
J
K
V
OUT
L
BGA PACKAGE
77-PIN (15mm
×
9mm
×
5.01mm)
T
JMAX
= 125°C
θ
JCtop
= 20.6°C/W,
θ
JCbottom
= 5.1°C/W,
θ
JB
= 6.0°C/W,
θ
JA
= 15.5°C/W
θ
VALUES DETERMINED PER JESD51-12
WEIGHT = 1.8 GRAMS
NC
V
OSNS
SGND
ISETb
CLKIN
NC
2
V
IN
V
D
PGND
3
TOP VIEW
4
5
6
7
Terminal Voltages
V
IN
, V
D
, SV
IN
, SW, V
OUT
, V
OSNS
, ISETa....–0.3V to 60V
GND, ISETb, EXTV
CC
............................ –0.3V to 28V
RUN .................................... GND–0.3V to PGND+60V
INTV
CC
, PGDFB, VINREG, COMPa, COMPb,
IMONa, IMONb ........................................ –0.3V to 4V
f
SET
................................................... –0.3V to INTV
CC
CLKIN, PGOOD (Relative to GND) ........... –0.3V to 6V
Terminal Currents
INTV
CC
Peak Output Current (Note 8) ................30mA
TEMP
+
..................................................–1mA to 10mA
TEMP
–
.................................................–10mA to 1mA
Temperatures
Internal Operating Temperature Range
(Note 2) ............................................. –40°C to 125°C
Storage Temperature Range .............. –55°C to 125°C
Peak Solder Reflow Package
Body Temperature ............................................ 245°C
IMONb IMONa SV
IN
PGOOD PGDFB VINREG GND
COMPb COMPa
f
SET
SGND
NC
ISETa EXTV
CC
RUN
INTV
CC
SW
TEMP
+
TEMP
–
PGND
TEMP
+
TEMP
–
ORDER INFORMATION
PART NUMBER
LTM4653EY#PBF
LTM4653IY#PBF
LTM4653IY
PAD OR BALL FINISH
SAC305 (RoHS)
SAC305 (RoHS)
SnPb (63/37)
http://www.linear.com/product/LTM4653#orderinfo
PART MARKING*
DEVICE
LTM4653Y
FINISH CODE
e1
e1
e0
BGA
3
PACKAGE
TYPE
MSL
RATING
TEMPERATURE RANGE
(SEE NOTE 2)
–40°C to 125°C
–40°C to 125°C
–40°C to 125°C
• Device temperature grade is indicated by a label on the shipping container. • Recommended BGA PCB Assembly and Manufacturing Procedures:
www.linear.com/BGA-assy
• Pad or ball finish code is per IPC/JEDEC J-STD-609.
• Terminal Finish Part Marking:
www.linear.com/leadfree
• This product is not recommended for second side reflow. For more
information, go to
www.linear.com/BGA-assy
• BGA Package and Tray Drawings:
www.linear.com/packaging
• This product is moisture sensitive. For more information, go to:
www.linear.com/BGA-assy
2
Rev 0
For more information
www.analog.com
LTM4653
The
l
denotes the specifications which apply over the specified internal
operating temperature range (Note 2). T
A
= 25°C, Test Circuit, V
IN
= SV
IN
= 48V, EXTV
CC
= 24V, RUN = 3.3V, R
ISET
= 480k,
R
fSET
= 57.6kΩ, f
SW
= 1.5MHz (CLKIN driven with 1.2MHz clock signal) unless otherwise noted.
SYMBOL
SV
IN(DC)
, V
IN(DC)
V
OUT(RANGE)
V
OUT(24VDC)
V
OUT(0.5VDC)
PARAMETER
Input DC Voltage
Range of Output Voltage Regulation
Output Voltage Total Variation with
Line and Load at V
OUT
= 24V
Output Voltage Total Variation with
Line and Load at V
OUT
= 0.5V
0.5V ≤ ISETa - SGND ≤ 0.94V
IN
, I
OUT
= 0A (See Note 6)
28V ≤ V
IN
≤ 58V, 0A ≤ I
OUT
≤ 4A, C
INH
= 4.7μF,
C
D
= 4.7μF, C
OUTH
= 2
×
47μF, CLKIN driven with
1.5MHz Clock
Measuring V
OSNS
- ISETa
3.1V ≤ V
IN
≤ 13.2V, 0A ≤ I
OUT
≤ 4A, C
INH
= 4.7μF,
C
D
= 4.7μF, C
OUTH
= 2
×
47μF, ISETa = 500mV,
R
fSET
= N/U (Note 5)
CONDITIONS
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ELECTRICAL CHARACTERISTICS
MIN
3.1
0.5
23.6
TYP
MAX
58
0.94V
IN
UNITS
V
V
V
24
24.4
l
–15
0
15
mV
Input Specifications
V
IN(UVLO)
V
IN(OVLO)
V
IN(HYS)
I
INRUSH(VIN)
I
Q(SVIN)
I
S(VIN, FCM)
I
S(VIN, SHUTDOWN)
I
OUT
∆V
OUT(LINE)
/V
OUT
∆V
OUT(LOAD)
/V
OUT
V
OUT(AC)
f
s
∆V
OUT(START)
t
START
SV
IN
Undervoltage Lockout Threshold SV
IN
Rising
SV
IN
Falling
Hysteresis
SV
IN
Overvoltage Lockout Rising
SV
IN
Overvoltage Lockout Hysteresis
Input Inrush Current at Start-Up
Input Supply Bias Current
Input Supply Current
Input Supply Current in Shutdown
V
OUT
Output Continuous Current
Range
Line Regulation Accuracy
Load Regulation Accuracy
Output Voltage Ripple, V
OUT
V
OUT
Ripple Frequency
Turn-On Overshoot
Turn-On Start-Up Time
Delay Measured from V
IN
Toggling from 0V to 48V to
PGOOD Exceeding 3V; PGOOD Having a 100k Pull-Up
to 3.3V, VPGFB Resistor-Divider Network as Shown in
Test Circuit, R
ISETa
= 480k, ISETa Electrically Connected
to ISETb and CLKIN Driven with 1.5MHz Clock
I
OUT
: 0A to 2A and 2A to 0A Load Steps in 1μs,
C
OUTH
= 47µF × 2
I
OUT
: 0A to 2A and 2A to 0A Load Steps in 1μs,
C
OUTH
= 47µF × 2
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2.4
150
64
2.85
2.6
250
68
2
300
16
450
2.1
4
3.1
2.9
V
V
mV
V
V
mA
(Note 4)
(Note 4)
C
INH
= 4.7μF, C
D
= 4.7μF, C
OUTH
= 2
×
47μF; I
OUT
= 0A,
ISETa Electrically Connected to ISETb
Shutdown, RUN = GND
RUN = V
IN
CLKIN Open Circuit, I
OUT
= 4A
Shutdown, RUN = GND
(Note 3)
I
OUT
= 0A, 28V ≤ V
IN
≤58V
V
IN
= 48V, 0A ≤ I
OUT
≤ 4A
V
IN
= 12V, ISETa = 5V
ISETa = 5V, R
fSET
= 57.6k, CLKIN Open Circuit
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4
30
μA
μA
A
µA
Output Specifications
0
0.05
0.05
2
1.7
1.95
8
4
9
2.2
4
0.1
0.75
A
%
%
mV
P–P
MHz
mV
ms
∆V
OUT(LS)
t
SETTLE
I
OUT(OCL)
Control Section
I
ISETa
I
VOSNS
t
ON(MIN)
Peak Output Voltage Deviation for
Dynamic Load Step
Settling Time for Dynamic Load Step
I
OUT–
Output Current Limit
Reference Current of ISETa Pin
V
OSNS
Leakage Current
Minimum On-Time
400
50
5.5
mV
µs
A
50.7
51
µA
µA
µA
ns
V
ISETa
= 0.5V, 3.1V ≤ V
IN
≤ 13.2V
V
ISETa
= 24V, 28V ≤ V
IN
≤ 58V
V
IN
= SV
IN
= RUN = ISETa = 58V
(Note 4 )
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49
50
50
600
60
For more information
www.analog.com
3
Rev 0
LTM4653
The
l
denotes the specifications which apply over the specified internal
operating temperature range (Note 2). T
A
= 25°C, Test Circuit, V
IN
= SV
IN
= 48V, EXTV
CC
= 24V, RUN = 3.3V, R
ISET
= 480k,
R
fSET
= 57.6kΩ, f
SW
= 1.5MHz (CLKIN driven with 1.2MHz clock signal) unless otherwise noted.
SYMBOL
V
RUN
I
RUN
f
OSC
f
SYNC
PARAMETER
RUN Turn-On/-Off Thresholds
RUN Leakage Current
Oscillator Frequency Accuracy
CONDITIONS
RUN Input Turn-On Threshold, RUN Rising
RUN Hysteresis
RUN = 3.3V
V
IN
= 12V, ISETa = 5V, and:
f
SET
Open Circuit
R
fSET
= 57.6kΩ (See f
s
Specification)
V
IN
= 12V, ISETa = 5V, CLKIN Driven with a GND-
Referred Clock Toggling from 0.4V to 1.2V and Having
a Clock Duty Cycle:
From 10% to 90%; f
SET
Open Circuit
From 40% to 60%; R
fSET
= 57.6kΩ
V
CLKIN
Rising
V
CLKIN
Falling
V
CLKIN
= 5V
V
CLKIN
= 0V
PGDFB Rising
PGDFB Falling
PGDFB Returning
4.94
V
PGOOD
= 0.1V, V
PGDFB
< UV
PGDFB
or
V
PGDFB
> OV
PGDFB
V
PGOOD
= 3.3V, UV
PGDFB
< V
PGDFB
< OV
PGDFB
PGOOD Low to High (Note 4)
PGOOD High to Low (Note 4)
Ratio of V
OUT
Output Current to I
IMONa
Current, I
OUT
= 4A
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I
IMONa
at I
OUT
= 0A
IMONa Voltage During Output Current Regulation
VINREG Voltage During Output Current Regulation
VINREG = 2V
3.6V ≤ SV
IN
≤ 58V, EXTV
CC
= Open Circuit
5V ≤ SV
IN
≤ 58V, 3.2V ≤ EXTV
CC
≤ 26.5V
(Note 4)
0mA ≤ I
INTVCC
≤ 30mA
–2
3.15
2.85
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ELECTRICAL CHARACTERISTICS
MIN
1.08
TYP
1.2
130
0.1
MAX
1.32
50
UNITS
V
mV
nA
Oscillator and Phase-Locked Loop (PLL)
l
360
400
1.95
440
kHz
MHz
PLL Synchronization Capture Range
250
1.3
1.2
230
–5
645
555
8
4.99
700
0.1
16/f
SW(HZ)
64/f
SW(HZ)
36
–5
9.8
1.9
1.8
10
2.0
2.0
1
3.4
3.0
3.15
0.5
40
550
3
0.4
500
kHz
MHz
V
V
μA
μA
mV
mV
mV
V
CLKIN
I
CLKIN
CLKIN Input Threshold
CLKIN Input Current
–20
620
525
Power Good Feedback Input and Power Good Output
OV
PGDFB
UV
PGDFB
∆V
PGDFB
R
PGDFB
R
PGOOD
I
PGOOD(LEAK)
t
PGOOD(DELAY)
Output Overvoltage PGOOD Upper
Threshold
Output Undervoltage PGOOD Lower
Threshold
PGOOD Hysteresis
Resistor Between PGDFB and SGND
PGOOD Pull-Down Resistance
PGOOD Leakage Current
PGOOD Delay
675
580
5.04
1500
1
kΩ
Ω
μA
s
s
Current Monitor and Input Voltage Regulation Pins
h
IMONa
I
OS(IMON)
I
MONb
Resistor
V
IMONa
V
VINREG
I
VINREG
INTV
CC
Regulator
V
INTVCC
V
EXTVCC(TH)
∆V
INTVCC(LOAD)
/
V
INTVCC
Channel Internal V
CC
Voltage, No
INTV
CC
Loading (I
INTVCC
= 0mA)
EXTV
CC
Switchover Voltage
INTV
CC
Load Regulation
3.65
3.15
2
V
V
V
%
I
OUT
/I
IMONa
I
MONa
Offset Current
Resistor Between I
MONb
and SGND
I
MONa
Servo Voltage
VINREG Servo Voltage
VINREG Leakage Current
44
5
10.2
2.1
2.2
k
µA
kΩ
V
V
nA
4
Rev 0
For more information
www.analog.com
LTM4653
The
l
denotes the specifications which apply over the specified internal
operating temperature range (Note 2). T
A
= 25°C, Test Circuit, V
IN
= SV
IN
= 48V, EXTV
CC
= 24V, RUN = 3.3V, R
ISET
= 480k,
R
fSET
= 57.6kΩ, f
SW
= 1.5MHz (CLKIN driven with 1.2MHz clock signal) unless otherwise noted.
SYMBOL
Temperature Sensor
∆V
TEMP
TC
∆V(TEMP)
Temperature Sensor Forward Voltage, I
TEMP+
= 100µA and I
TEMP–
= –100μA at T
A
= 25°C
V
TEMP+
– V
TEMP–
∆V
TEMP
Temperature Coefficient
0.6
–2.0
V
mV/°C
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
ELECTRICAL CHARACTERISTICS
Note 1:
Stresses beyond those listing under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating conditions for extended periods may affect device
reliability and lifetime.
Note 2:
The LTM4653 is tested under pulsed load conditions such that
T
J
≈ T
A
. The LTM4653E is guaranteed to meet performance specifications
over the 0°C to 125°C internal operating temperature range. Specifications
over the full –40°C to 125°C internal operating temperature range are
assured by design, characterization and correlation with statistical process
controls.The LTM4653I is guaranteed to meet specifications over the full
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:
See output current derating curves for different V
IN
, V
OUT
, and T
A
,
located in the Applications Information section.
Note 4:
Minimum on-time, V
IN
Overvoltage Lockout and Overvoltage
Lockout Hysteresis, and EXTV
CC
Switchover Threshold are tested at wafer
sort.
Note 5:
To ensure minimum on time criteria is met, V
OUT(0.5VDC)
high-line
regulation is tested at 13.2V
IN
, with f
SET
and CLKIN open circuit. See the
Applications Information section.
Note 6.
See Applications Information Section for Dropout Criteria.
Note 7.
This IC includes overtemperature protection that is intended
to protect the device during momentary overload conditions. Junction
temperature will exceed 125°C when overtemperature protection is active.
Continuous operation above the specified maximum operating junction
temperature may impair device reliability.
Note 8.
The INTV
CC
Abs Max peak output current is specified as the sum
of current drawn by circuits internal to the module biased off of INTV
CC
and current drawn by external circuits biased off of INTV
CC
. See the
Applications Information
section.
For more information
www.analog.com
5
Rev 0
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