FeaTures
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LTM4601AHV
12A, 28V
IN
DC/DC µModule
Regulator with PLL, Output
Tracking and Margining
DescripTion
The
LTM
®
4601AHV
is a complete 12A step-down switch
mode DC/DC power supply with onboard switching con-
troller, MOSFETs, inductor and all support components.
The µModule regulator is housed in a small surface mount
15mm
×
15mm
×
2.82mm LGA or 15mm
×
15mm
×
3.42mm BGA package. The LTM4601AHV LGA and BGA
packages are designed with redundant mounting pads to
enhance solder-joint strength for extended temperature
cycling endurance. Operating over an input voltage range
of 4.5V to 28V, the LTM4601AHV supports an output volt-
age range of 0.6V to 5V as well as output voltage tracking
and margining. The high efficiency design delivers 12A
continuous current (14A peak). Only bulk input and output
capacitors are needed to complete the design.
The low profile and light weight package easily mounts
in unused space on the back side of PC boards for high
density point of load regulation. The µModule regulator
can be synchronized with an external clock for reducing
undesirable frequency harmonics and allows PolyPhase
®
operation for high load currents.
An onboard differential remote sense amplifier can be used
to accurately regulate an output voltage independent of
load current. The LTM4601AHV is available with SnPb or
RoHS compliant terminal finish.
L,
LT, LTC and LTM, Linear Technology, the Linear logo, µModule and PolyPhase 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, 6580258, 6304066, 6476589, 6774611, 6677210.
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Complete Switch Mode Power Supply
Wide Input Voltage Range: 4.5V to 28V
12A DC Typical, 14A Peak Output Current
0.6V to 5V Output Voltage
Output Voltage Tracking and Margining
Redundant Mounting Pads for Enhanced
Solder-Joint Strength
Parallel Multiple µModule
®
Regulators for
Current Sharing
Differential Remote Sensing for Precision Regulation
PLL Frequency Synchronization
±1.5%
Total DC Error
Current Foldback Protection (Disabled at Start-Up)
SnPb or RoHS Compliant Finish
–55°C to 125°C Operating Temperature Range
(LTM4601AHVMPV)
Ultrafast™ Transient Response
Up to 95% Efficiency at 5V
IN
, 3.3V
OUT
Programmable Soft-Start
Output Overvoltage Protection
Enhanced (15mm
×
15mm
×
2.82mm) Surface Mount
LGA and (15mm
×
15mm
×
3.42mm) BGA Packages
applicaTions
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Telecom, Industrial and Networking Equipment
Military and Avionics Systems
Typical applicaTion
2.5V/12A Power Supply with 4.5V to 28V Input
V
IN
4.5V TO 28V
V
IN
PGOOD
ON/OFF
C
IN
RUN
COMP
INTV
CC
DRV
CC
MPGM
PLLIN TRACK/SS
V
OUT
V
FB
MARG0
MARG1
V
OUT_LCL
DIFFV
OUT
V
OSNS+
V
OSNS–
R
SET
19.1k
4601AHV TA01a
Efficiency and Power Loss
vs Load Current
95
90
85
EFFICIENCY (%)
V
OUT
2.5V
12A
80
75
70
65
60
55
50
45
0
2
8
6
4
10
LOAD CURRENT (A)
12
14
EFFICIENCY
12V
IN
24V
IN
4
POWER LOSS
24V
IN
12V
IN
3
2
1
0
POWER LOSS (W)
6
5
CLOCK SYNC
TRACK/SS CONTROL
100pF
MARGIN
CONTROL
LTM4601AHV
C
OUT
R1
392k
5% MARGIN
SGND
PGND
f
SET
4601AHV TA01b
4601ahvfc
For more information
www.linear.com/LTM4601AHV
1
LTM4601AHV
absoluTe MaxiMuM raTings
INTV
CC
, DRV
CC
, V
OUT_LCL
, V
OUT
(V
OUT
≤ 3.3V with
Remote Sense Amp) .................................... –0.3V to 6V
PLLIN, TRACK/SS, MPGM, MARG0, MARG1,
PGOOD, f
SET
..............................–0.3V to INTV
CC
+ 0.3V
RUN ............................................................. –0.3V to 5V
V
FB
, COMP ................................................ –0.3V to 2.7V
V
IN
............................................................. –0.3V to 28V
(Note 1)
V
OSNS+
, V
OSNS –
..........................–0.3V to INTV
CC
+ 0.3V
Operating Temperature Range (Note 2)
E and I Grades .....................................–40°C to 85°C
MP Grade ........................................... –55°C to 125°C
Junction Temperature ........................................... 125°C
Storage Temperature Range .................. –55°C to 125°C
pin conFiguraTion
TRACK/SS
INTV
CC
TRACK/SS
TOP VIEW
PLLIN
TOP VIEW
INTV
CC
MPGM
COMP
PLLIN
RUN
MPGM
f
SET
MARG0
MARG1
DRV
CC
V
FB
PGOOD
SGND
V
OSNS+
DIFFV
OUT
V
OUT
V
OUT_LCL
V
OSNS–
LGA PACKAGE
133-LEAD (15mm
×
15mm
×
2.82mm)
COMP
RUN
MTP1
MTP2
INTV
CC
PGND
MTP3
V
IN
MTP1
MTP2
INTV
CC
MTP3
f
SET
MARG0
MARG1
DRV
CC
V
FB
PGOOD
SGND
V
OSNS+
DIFFV
OUT
V
IN
PGND
V
OUT
V
OUT_LCL
V
OSNS–
BGA PACKAGE
133-LEAD (15mm
×
15mm
×
3.42mm)
T
JMAX
= 125°C,
θ
JA
= 15.5°C/W,
θ
JCbottom
= 6.5°C/W
θ
JA
DERIVED FROM 95mm × 76mm PCB WITH 4 LAYERS
WEIGHT = 1.9g
T
JMAX
= 125°C,
θ
JA
= 15°C/W,
θ
JCbottom
= 6°C/W
θ
JA
DERIVED FROM 95mm × 76mm PCB WITH 4 LAYERS
WEIGHT = 1.7g
orDer inForMaTion
PART NUMBER
LTM4601AHVEV#PBF
LTM4601AHVIV#PBF
LTM4601AHVMPV#PBF
LTM4601AHVEY#PBF
LTM4601AHVIY#PBF
LTM4601AHVIY
LTM4601AHVMPY#PBF
LTM4601AHVMPY
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
LTM4601AHVV
LTM4601AHVV
LTM4601AHVMPV
LTM4601AHVY
LTM4601AHVY
LTM4601AHVY
LTM4601AHVMPY
LTM4601AHVMPY
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
2
4601ahvfc
For more information
www.linear.com/LTM4601AHV
LTM4601AHV
The
l
denotes the specifications which apply over the specified operating
temperature range (Note 2). Otherwise specifications are at T
A
= 25°C, V
IN
= 12V, per typical application (front page) configuration,
R
SET
= 40.2k.
SYMBOL
V
IN(DC)
V
OUT(DC)
Input Specifications
V
IN(UVLO)
I
INRUSH(VIN)
I
Q(VIN,NO LOAD)
Undervoltage Lockout Threshold
Input Inrush Current at Startup
I
OUT
= 0A
I
OUT
= 0A. V
OUT
= 1.5V
V
IN
= 5V
V
IN
= 12V
V
IN
= 12V, No Switching
V
IN
= 12V, V
OUT
= 1.5V, Switching Continuous
V
IN
= 5V, No Switching
V
IN
= 5V, V
OUT
= 1.5V, Switching Continuous
Shutdown, RUN = 0, V
IN
= 12V
V
IN
= 12V, V
OUT
= 1.5V, I
OUT
= 12A
V
IN
= 12V, V
OUT
= 3.3V, I
OUT
= 12A
V
IN
= 5V, V
OUT
= 1.5V, I
OUT
= 12A
No Load
V
IN
= 12V, V
OUT
= 1.5V (Note 5)
V
OUT
= 1.5V, I
OUT
= 0A, V
IN
from 4.5V to 28V
V
OUT
= 1.5V, I
OUT
= 0A to 12A, V
IN
= 12V, with
Remote Sense Amplifier (Note 5)
I
OUT
= 0A, C
OUT
= 2× 100µF X5R Ceramic
V
IN
= 12V, V
OUT
= 1.5V
V
IN
= 5V, 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
= 12V
V
IN
= 5V
Load: 0% to 50% to 0% of Full Load,
C
OUT
= 2
×
22µF Ceramic, 470µF 4V Sanyo
POSCAP
V
IN
= 12V
V
IN
= 5V
l
elecTrical characTerisTics
PARAMETER
Input DC Voltage
Output Voltage Total Variation with
Line and Load
CONDITIONS
l
MIN
4.5
1.478
TYP
MAX
28
UNITS
V
V
V
A
A
mA
mA
mA
mA
µA
A
A
A
C
IN
= 10µF
×3,
C
OUT
= 200µF R
SET
= 40.2k
,
V
IN
= 5V to 28V, I
OUT
= 0A to 12A (Note 5)
l
1.5
3.2
0.6
0.7
3.8
38
2.5
42
22
1.81
3.63
4.29
1.522
4
Input Supply Bias Current
I
S(VIN)
INTV
CC
I
OUTDC
ΔV
OUT(LINE)
V
OUT
ΔV
OUT(LOAD)
V
OUT
V
OUT(AC)
f
S
ΔV
OUT(START)
Input Supply Current
V
IN
= 12V, RUN > 2V
Output Continuous Current Range
Line Regulation Accuracy
Load Regulation Accuracy
Output Ripple Voltage
4.7
0
5
5.3
12
0.3
0.25
V
A
%
%
Output Specifications
l
20
18
850
mV
P-P
mV
P-P
kHz
Output Ripple Voltage Frequency
Turn-On Overshoot
20
20
mV
mV
t
START
Turn-On Time
0.5
0.7
ms
ms
ΔV
OUTLS
Peak Deviation for Dynamic Load
35
35
25
17
17
mV
mV
µs
A
A
t
SETTLE
I
OUTPK
Settling Time for Dynamic Load Step Load: 0% to 50%, or 50% to 0% of Full Load
V
IN
= 12V
Output Current Limit
C
OUT
= 200µF Ceramic
V
IN
= 12V, V
OUT
= 1.5V
V
IN
= 5V, V
OUT
= 1.5V
4601ahvfc
For more information
www.linear.com/LTM4601AHV
3
LTM4601AHV
elecTrical characTerisTics
SYMBOL
V
OSNS+
, V
OSNS–
CM Range
DIFFV
OUT
Range
V
OS
A
V
GBP
SR
R
IN
CMRR
Control Stage
V
FB
V
RUN
I
TRACK/SS
t
ON(MIN)
t
OFF(MIN)
R
PLLIN
I
DRVCC
R
FBHI
V
MPGM
V
MARG0
, V
MARG1
PGOOD Output
ΔV
FBH
ΔV
FBL
ΔV
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
Error Amplifier Input Voltage
Accuracy
RUN Pin On/Off Threshold
Soft-Start Charging Current
Minimum On Time
Minimum Off Time
PLLIN Input Resistance
Current into DRV
CC
Pin
Resistor Between V
OUT_LCL
and V
FB
Margin Reference Voltage
MARG0, MARG1 Voltage Thresholds
V
OUT
= 1.5V, I
OUT
= 1A, DRV
CC
= 5V
60.098
V
TRACK/SS
= 0V
(Note 4)
(Note 4)
I
OUT
= 0A, V
OUT
= 1.5V
l
The
l
denotes the specifications which apply over the specified operating
temperature range (Note 2). Otherwise specifications are at T
A
= 25°C, V
IN
= 12V, per typical application (front page) configuration,
R
SET
= 40.2k.
PARAMETER
CONDITIONS
MIN
0
0
l
TYP
MAX
INTV
CC
– 1
INTV
CC
– 1
1.25
2
UNITS
V
V
mV
mV
V/V
MHz
V/µs
kW
dB
Remote Sense Amp (Note 3)
Common Mode Input Voltage Range V
IN
= 12V, RUN > 2V
Output Voltage Range
Input Offset Voltage Magnitude
Differential Gain
Gain Bandwidth Product
Slew Rate
Input Resistance
Common Mode Rejection Mode
0.594
1
–1.0
V
OSNS+
to GND
1
3
2
20
100
0.6
1.5
–1.5
50
250
50
18
60.4
1.18
1.4
25
60.702
0.606
1.9
–2.0
100
400
V
IN
= 12V, DIFFV
OUT
Load = 100k
V
V
µA
ns
ns
kW
mA
kW
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 LTM4601AHV is tested under pulsed load conditions such
that T
J
≈ T
A
. The LTM4601AHVE is guaranteed to meet performance
specifications from 0°C to 85°C. Specifications over the –40°C to 85°C
operating temperature range are assured by design, characterization
and correlation with statistical process controls. The LTM4601AHVI is
guaranteed over the –40°C to 85°C operating temperature range. The
LTM4601AHVMP is guaranteed and tested over the –55°C to 125°C
operating temperature range. For output current derating at high
temperature, please refer to Thermal Considerations and Output Current
Derating discussion.
Note 3:
Remote sense amplifier recommended for ≤3.3V output.
Note 4:
100% tested at wafer level only.
Note 5:
See output current derating curves for different V
IN
, V
OUT
and T
A
.
4
4601ahvfc
For more information
www.linear.com/LTM4601AHV
LTM4601AHV
Typical perForMance characTerisTics
Efficiency vs Load Current
with 5V
IN
100
95
90
EFFICIENCY (%)
EFFICIENCY (%)
85
80
75
70
65
60
0
0.6V
OUT
1.2V
OUT
1.5V
OUT
2.5V
OUT
3.3V
OUT
5
10
15
4601AHV G01
(See Figures 19 and 20 for all curves)
Efficiency vs Load Current
with 24V
IN
95
90
85
EFFICIENCY (%)
80
75
70
65
60
55
50
15
4601AHV G02
Efficiency vs Load Current
with 12V
IN
100
95
90
85
80
75
70
65
60
55
50
0
0.6V
OUT
1.2V
OUT
1.5V
OUT
2.5V
OUT
3.3V
OUT
5V
OUT
10
5
LOAD CURRENT (A)
45
1.5V
OUT
2.5V
OUT
3.3V
OUT
5.0V
OUT
0
10
5
LOAD CURRENT (A)
15
4601AHV G03
LOAD CURRENT (A)
1.2V Transient Response
V
OUT
50mV/DIV
I
OUT
5A/DIV
V
OUT
50mV/DIV
1.5V Transient Response
V
OUT
50mV/DIV
1.8V Transient Response
I
OUT
5A/DIV
I
OUT
5A/DIV
20µs/DIV
1.2V AT 6A/µs LOAD STEP
C
OUT
= 3× 22µF 6.3V CERAMICS,
470µF 4V SANYO POSCAP
C3 = 100pF
4601AHV G04
20µs/DIV
1.5V AT 6A/µs LOAD STEP
C
OUT
= 3× 22µF 6.3V CERAMICS,
470µF 4V SANYO POSCAP
C3 = 100pF
4601AHV G05
20µs/DIV
1.8V AT 6A/µs LOAD STEP
C
OUT
= 3× 22µF 6.3V CERAMICS,
470µF 4V SANYO POSCAP
C3 = 100pF
4601AHV G06
2.5V Transient Response
V
OUT
50mV/DIV
V
OUT
50mV/DIV
I
OUT
5A/DIV
3.3V Transient Response
0.606
0.604
0.602
V
FB
(V)
0.600
0.598
0.596
V
FB
vs Temperature
I
OUT
5A/DIV
20µs/DIV
2.5V AT 6A/µs LOAD STEP
C
OUT
= 3× 22µF 6.3V CERAMICS,
470µF 4V SANYO POSCAP
C3 = 100pF
4601AHV G07
20µs/DIV
3.3V AT 6A/µs LOAD STEP
C
OUT
= 3× 22µF 6.3V CERAMICS,
470µF 4V SANYO POSCAP
C3 = 100pF
4601AHV G08
0.594
–55
–25
35
65
5
TEMPERATURE (°C)
95
125
4601AHV G15
4601ahvfc
For more information
www.linear.com/LTM4601AHV
5
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