controller, MOSFETs, inductor and all support compo-
nents. The μModule is housed in a small surface mount
15mm
×
15mm
×
2.8mm LGA package. The LTM4601AHV
LGA package is designed with redundant mounting pads
to enhance solder-joint strength for extended temperature
cycling endurance. Operating over an input voltage range
of 4.5 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 (2.8mm) and light weight (1.7g) pack-
age easily mounts in unused space on the back side of
PC boards for high density point of load regulation. The
μModule 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.
L,
LT, LTC and LTM are registered trademarks of Linear Technology Corporation. PolyPhase is
a registered trademark of Linear Technology Corporation. μModule and Ultrafast 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.
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 μModules
TM
for Current Sharing
Differential Remote Sensing for Precision Regulation
PLL Frequency Synchronization
±1.5%
Total DC Error
Current Foldback Protection (Disabled at Start-Up)
Pb-Free (e4) RoHS Compliant Package with Gold
Finish Pads
–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
×
2.8mm) Surface Mount
LGA Package
APPLICATIONS
n
n
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–
f
SET
R
SET
19.1k
4601AHV TA01a
Efficiency and Power Loss
vs Load Current
95
90
85
V
OUT
2.5V
12A
EFFICIENCY
12V
IN
5
24V
IN
POWER LOSS (W)
4
POWER LOSS
3
24V
IN
12V
IN
2
1
0
6
CLOCK SYNC
TRACK/SS CONTROL
100pF
MARGIN
CONTROL
EFFICIENCY (%)
80
75
70
65
60
55
50
45
0
2
LTM4601AHV
C
OUT
R1
392k
5% MARGIN
SGND
PGND
8
6
4
10
LOAD CURRENT (A)
12
14
4601AHV TA01b
4601ahvf
1
LTM4601AHV
ABSOLUTE MAXIMUM RATINGS
(Note 1)
PIN CONFIGURATION
TOP VIEW
INTV
CC
PLLIN
TRACK/SS
RUN
COMP
MPGM
MTP1
INTV
CC
PGND
MTP2
MTP3
f
SET
MARG0
MARG1
DRV
CC
V
FB
PGOOD
SGND
V
OSNS+
DIFFV
OUT
V
OUT_LCL
V
OSNS–
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
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
V
IN
V
OUT
LGA PACKAGE
133-LEAD (15mm 15mm 2.8mm)
T
JMAX
= 125°C,
θ
JA
= 15°C/W,
θ
JC
= 6°C/W,
θ
JA
DERIVED FROM 95mm
×
76mm PCB WITH 4 LAYERS
WEIGHT = 1.7g
ORDER INFORMATION
LEAD FREE FINISH
LTM4601AHVEV#PBF
LTM4601AHVIV#PBF
LTM4601AHVMPV#PBF
PART MARKING*
LTM4601AHVV
LTM4601AHVV
LTM4601AHVMPV
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 85°C
–40°C to 85°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/
ELECTRICAL CHARACTERISTICS
SYMBOL
V
IN(DC)
V
OUT(DC)
Input Specifications
V
IN(UVLO)
I
INRUSH(VIN)
Undervoltage Lockout Threshold
Input Inrush Current at Startup
PARAMETER
Input DC Voltage
Output Voltage Total Variation with
Line and Load
The
l
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C, V
IN
= 12V. Per typical application (front page) configuration, R
SET
= 40.2k.
CONDITIONS
l
MIN
4.5
1.478
TYP
MAX
28
UNITS
V
V
V
A
A
mA
mA
mA
mA
μA
4601ahvf
C
IN
= 10μF
×3,
C
OUT
= 200μF R
SET
= 40.2k
,
V
IN
= 5V to 28V, I
OUT
= 0A to 12A (Note 5)
I
OUT
= 0A
I
OUT
= 0A. V
OUT
= 1.5V
V
IN
= 5V
V
IN
= 12V
V
IN
= 12V, V
OUT
= 1.5V, No Switching
V
IN
= 12V, V
OUT
= 1.5V, Switching Continuous
V
IN
= 5V, V
OUT
= 1.5V, No Switching
V
IN
= 5V, V
OUT
= 1.5V, Switching Continuous
Shutdown, RUN = 0, V
IN
= 12V
l
1.5
3.2
0.6
0.7
3.8
38
2.5
42
22
1.522
4
I
Q(VIN,NO LOAD)
Input Supply Bias Current
2
LTM4601AHV
The
l
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C, V
IN
= 12V. Per typical application (front page) configuration, R
SET
= 40.2k.
SYMBOL
I
S(VIN)
PARAMETER
Input Supply Current
CONDITIONS
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
= 4.5V – 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
,
V
IN
= 12V
V
IN
= 5V
C
OUT
= 200μF V
OUT
= 1.5V,
,
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
l
ELECTRICAL CHARACTERISTICS
MIN
TYP
1.81
3.63
4.29
MAX
UNITS
A
A
A
INTV
CC
I
OUTDC
ΔV
OUT(LINE)
V
OUT
ΔV
OUT(LOAD)
V
OUT
V
OUT(AC)
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
20
18
850
20
20
mV
P-P
mV
P-P
kHz
mV
mV
f
S
ΔV
OUT(START)
Output Ripple Voltage Frequency
Turn-On Overshoot,
TRACK/SS = 10nF
Turn-On Time, TRACK/SS = Open
t
START
0.5
0.7
ms
ms
ΔV
OUTLS
Peak Deviation for Dynamic Load
35
35
25
17
17
0
0
l
mV
mV
μs
A
A
INTV
CC
– 1
INTV
CC
1.25
2
V
V
mV
mV
V/V
MHz
V/μs
kΩ
dB
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 Table 2
,
V
IN
= 12V, V
OUT
= 1.5V
V
IN
= 5V, V
OUT
= 1.5V
Remote Sense Amp (Note 3)
V
OSNS+
, V
OSNS–
CM Range
DIFFV
OUT
Range
V
OS
A
V
GBP
SR
R
IN
CMRR
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
V
OSNS+
to GND
V
IN
= 12V, DIFF OUT Load = 100k
1
3
2
20
100
4601ahvf
3
LTM4601AHV
ELECTRICAL CHARACTERISTICS
SYMBOL
Control Stage
V
FB
V
RUN
I
SS/TRACK
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
and V
FB
Margin Reference Voltage
MARG0, MARG1 Voltage Thresholds
V
OUT
= 1.5V, I
OUT
= 1A, Frequency = 850kHz,
DRV
CC
= 5V
60.098
V
SS/TRACK
= 0V
(Note 4)
(Note 4)
I
OUT
= 0A, V
OUT
= 1.5V
l
The
l
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C, V
IN
= 12V. Per typical application (front page) configuration, R
SET
= 40.2k.
PARAMETER
CONDITIONS
MIN
0.594
1
–1.0
TYP
0.6
1.5
–1.5
50
250
50
18
60.4
1.18
1.4
25
60.702
MAX
0.606
1.9
–2.0
100
400
UNITS
V
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 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 and tested over the –40°C to 85°C temperature range. The
LTM4601AHVMP is guaranteed and tested over the –55°C to 125°C
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
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