LTM4662
Dual 15A or Single 30A
DC/DC µModule Regulator
FEATURES
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DESCRIPTION
The
LTM
®
4662
is a complete dual 15A output switching
mode DC/DC power supply. Included in the package are
the switching controller, power FETs, inductors, and all
supporting components. Operating from an input voltage
range of 4.5V to 20V, the LTM4662 supports two outputs
each with an output voltage range of 0.6V to 5.5V, set by
external resistors. Its high efficiency design delivers up to
15A continuous current for each output. Only a few input
and output capacitors are needed.
The device supports frequency synchronization, multiphase
operation, high efficiency light load operation and output
voltage tracking for supply rail sequencing and has an
onboard temperature diode per channel for device tempera-
ture monitoring. High switching frequency and a current
mode architecture enable a very fast transient response to
line and load changes without sacrificing stability.
Fault protection features include overvoltage and overcur-
rent protection. The power module is offered in a small
footprint and thermally enhanced 11.25mm × 15mm ×
5.74mm BGA package. The LTM4662 is available with
SnPb or RoHS compliant terminal finish.
All registered trademarks and trademarks are the property of their respective owners.
Click to view associated TechClip Videos.
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Dual 15A or Single 30A Output
Wide Input Voltage Range: 4.5V to 20V
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2.375V
MIN
with CPWR Bias
Output Voltage Range: 0.6V to 5.5V
±1.5% Maximum Total DC Output Error
Multiphase Current Sharing
Differential Remote Sense Amplifier, Each Channel
Current Mode Control/Fast Transient Response
Up to 96% Efficiency
Adjustable Switching Frequency (250kHz to 1MHz)
Frequency Synchronization
Overcurrent Foldback Protection
Output Overvoltage Protection
Internal or External Compensation
Built-In Temperature Monitor Diode
SnPb or RoHS Compliant Finish
Thermally Enhanced (11.25mm × 15mm × 5.74mm)
BGA Package
Pin-Compatible with the LTM4646
APPLICATIONS
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Point-of-Load Power Supplies
Telecom and Networking Equipment
Industrial and Medical Equipment
TYPICAL APPLICATION
V
IN
4.5V
TO 20V
10 F
×4
Efficiency,
12V to 0.9V, 1.2V at 15A Each
130k
V
IN1
V
IN2
CPWR
RUN1
RUN2
V
OUT1
V
OUTS1
VFB1
121k
V
OUTS1
–
INTV
CC
VRNG
MODE_PLLIN
DRV
CC
V
OUT2
V
OUTS2
4.7µF
V
OUT2
1.2V
AT 15A
100µF
×4
95
EFFICIENCY (%)
V
OUT1
0.9V
AT 15A
90
85
LTM4662
100 F
×4
V
FB2
60.4k
V
OUTS2–
COMP2A
COMP2B
TRACK/SS2
4662 TA01a
30.1k
80
75
12V
IN
TO 0.9V EFF, 300kHz
12V
IN
TO 1.2V EFF, 350kHz
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
LOAD CURRENT (A)
4662 TA01b
0.1µF
COMP1A
COMP1B
TRACK/SS1
FREQ
115k
SGND GND
0.1µF
PINS NOT USED IN THIS CIRCUIT:
PGOOD1, PGOOD2, EXTV
CC
,
TEMP1
+
, TEMP1
–
, TEMP2
+
, TEMP2
–
PHASMD, CLKOUT, SW1, SW2
70
For more information
www.linear.com/LTM4662
1
4662f
LTM4662
ABSOLUTE MAXIMUM RATINGS
(Note 1)
PIN CONFIGURATION
1
A
V
IN2
B
V
OUT2
C
D
E
F
G
H
J
V
OUT1
K
GND
L
BGA PACKAGE
88-LEAD (15mm
×
11.25mm
×
5.74mm)
T
JMAX
= 125°C,
θ
JA
= 7°C/W,
θ
JCbottom
= 1.5°C/W,
θ
JCtop
= 3.7°C/W,
θ
JB
+
θ
BA
≅
7°C/W
θ
VALUES DEFINED PER JESD51-12
WEIGHT = 2.2g
V
IN1
TEMP1
–
TEMP1
+
VRNG
–
SGND V
OUTS2
RUN2
CPWR, V
IN1
, V
IN2
....................................... –0.3V to 22V
V
SW1
, V
SW2
................................................... –2V to 22V
PGOOD1, PGOOD2, RUN1, RUN2, DRV
CC
,
INTV
CC
, EXTV
CC
, V
OUT1
, V
OUT2
, V
OUTS1
,
V
OUTS2
..................................................... –0.3V to 6V
TRACK/SS1, TRACK/SS2............................. –0.3V to 5V
FREQ, VRNG, PHASMD,
MODE_PLLIN ......................... –0.3V to (INTV
CC
+0.3)
V
OUTS1–
(Note 6) ....................................... –0.3V to V
FB1
V
OUTS2–
(Note 6) .......................–0.3V to (INTV
CC
+0.3V)
COMP1A, COMP2A (Note 6) ..................... –0.3V to 2.7V
COMP1B, COMP2B, V
FB1
, V
FB2
................. –0.3V to 2.7V
DRV
CC
Peak Output Current .................................100mA
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
2
3
TOP VIEW
4
5
6
7
TEMP2
–
TEMP2
+
8
GND
GND
SW2
COMP2B V
OUTS2
COMP2A V
FB2
MODE_
FREQ TRACK/SS2 PLLIN CLKOUT
COMP1B
V
OUTS1
COMP1A VFB1
PGOOD2
INTV
CC
EXTV
CC
CPWR
DRV
CC
PGOOD1
PHASMD SGND TRACK/SS1
RUN1
V
OUTS1–
GND
SW1
ORDER INFORMATION
PART NUMBER
LTM4662EY#PBF
LTM4662IY#PBF
LTM4662IY
BALL FINISH
SAC305 (RoHS)
SnPb (63/37)
http://www.linear.com/product/LTM4662#orderinfo
PART MARKING*
DEVICE
LTM4662Y
LTM4662Y
LTM4662Y
FINISH CODE
e1
e0
• Recommended BGA PCB Assembly and Manufacturing Procedures:
www.linear.com/umodule/pcbassembly
• BGA Package and Tray Drawings:
www.linear.com/packaging
PACKAGE
TYPE
BGA
MSL
RATING
3
TEMPERATURE RANGE
(SEE NOTE 2)
–40°C to 125°C
• Consult ADI Marketing for parts specified with wider operating
temperature ranges. *Device temperature grade is indicated by a label on
the shipping container. Ball finish code is per IPC/JEDEC J-STD-609.
• Terminal Finish Part Marking:
www.linear.com/leadfree
2
4662f
For more information
www.linear.com/LTM4662
LTM4662
The
l
denotes the specifications which apply over the specified internal
operating temperature range (Note 2). Specified as each individual output channel. T
A
= 25°C, V
IN
= 12V and V
RUN1
, V
RUN2
at 5V
unless otherwise noted. Per the typical application in Figure 20.
SYMBOL
V
IN(DC)
V
CPWR(DC)
V
OUT1, 2(Range)
V
OUT1(DC)
,
V
OUT2(DC)
Input Specifications
V
RUN1
, V
RUN2
R
RUN1
, R
RUN2
I
INRUSH(VIN)
I
Q(VIN)
I
S(VIN)
Output Specifications
I
OUT1(DC)
, I
OUT2(DC)
∆V
OUT1(LINE)
/V
OUT1
∆V
OUT2(LINE)
/V
OUT2
∆V
OUT1(LOAD)
/V
OUT1
∆V
OUT2(LOAD)
/V
OUT2
Output Continuous Current Range
Line Regulation Accuracy
Load Regulation Accuracy
V
IN
= 12V, V
OUT
= 1.5V (Notes 7, 8)
V
OUT
= 1.5V, V
IN
from 4.5V to 20V
I
OUT
= 0A for Each Output
For Each Output, V
OUT
= 1.5V, 0A to 15A
V
IN
= 12V (Note 7)
For Each Output, I
OUT
= 0A,
C
OUT
= 100µF ×4, V
IN
= 12V,
V
OUT
= 1.5V, Frequency = 350kHz
V
IN
= 12V, V
OUT
= 1.5V, R
FREQ
= 115kΩ (Note 4)
C
OUT
= 100µF ×4, V
OUT
= 1.5V, I
OUT
= 0A
V
IN
= 12V, C
SS
= 0.01µF
C
OUT
= 100µF ×4, No Load,
TRACK/SS with 0.01µF to GND, V
IN
= 12V
Load: 0A to 6A to 0A
C
OUT
= 100µF ×4,
V
IN
= 12V, V
OUT
= 1.5V
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ELECTRICAL CHARACTERISTICS
PARAMETER
Input DC Voltage
Input Control Power Voltage
Output Voltage Range
Output Voltage, Total Variation
with Line and Load
RUN Pin On/Off Threshold
RUN1, RUN2 Resistance
Input Inrush Current at Start-Up
CONDITIONS
2.375V with 5V External Bias on CPWR, 4.5V
Min without Bias
Input Range of Bias
Normally Connected to V
IN
(Note 8)
C
IN
= 10µF
×4,
C
OUT
= 100µF
×4
Ceramic
V
OUT
= 1.5V
RUN Rising
Pull-Down Resistance
I
OUT
= 0A, C
IN
= 10µF ×4, C
SS
= 0.01µF,
C
OUT
= 100µF ×4, V
OUT1
= 1.5V, V
OUT2
= 1.5V,
V
IN
= 12V
I
OUT
= 0.1A, f
SW
= 1MHz, Pulse-Skipping Mode
I
OUT
= 0.1A, f
SW
= 1MHz, Switching Continuous
Shutdown, RUN = 0, V
IN
= 12V
V
IN
= 4.5V, V
OUT
= 1.5V, I
OUT
= 15A
V
IN
= 12V, V
OUT
= 1.5V, I
OUT
= 15A
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MIN
2.375
4.5
0.6
1.4775
TYP
MAX
20
20
5.5
UNITS
V
V
V
V
1.5
1.5225
1.1
1.2
160
100
1
1.3
V
mV
kΩ
A
V
RUN1HYS
, V
RUN2HYS
RUN Pin On Hysteresis
Input Supply Bias Current
20
45
40
5.9
2.15
0
0.01
0.15
15
15
0.025
0.3
mA
mA
µA
A
A
A
%/V
%
mV
P-P
kHz
mV
ms
mV
Input Supply Current
V
OUT1(AC)
, V
OUT2(AC)
Output Ripple Voltage
f
S
(Each Channel)
∆V
OUTSTART
(Each Channel)
t
START
(Each Channel)
∆V
OUT(LS)
(Each Channel)
t
SETTLE
(Each Channel)
I
OUT(PK)
(Each Channel)
Output Ripple Voltage Frequency
Turn-On Overshoot
Turn-On Time
Peak Deviation for Dynamic Load
350
10
5
50
Settling Time for Dynamic Load Step Load: 0A to 6A to 0A
C
OUT
= 100µF ×4,
V
IN
= 12V, V
OUT
= 1.5V
Output Current Limit
V
IN
= 12V, V
OUT
= 1.5V
20
µs
22
A
For more information
www.linear.com/LTM4662
3
4662f
LTM4662
The
l
denotes the specifications which apply over the specified internal
operating temperature range (Note 2). Specified as each individual output channel. T
A
= 25°C, V
IN
= 12V and V
RUN1
, V
RUN2
at 5V
unless otherwise noted. Per the typical application in Figure 20.
SYMBOL
Control Section
V
FB1
V
FB2
I
FB1
, I
FB2
V
OVL1,
V
OVL2
I
TRACK/SS1
,
I
TRACK/SS2
UVLO
t
OFF(MIN)
t
ON(MIN)
R
FBHI1
, R
FBHI2
V
PGOOD1
, V
PGOOD2
Low
I
PGOOD
V
PGOOD
Feedback Overvoltage Lockout
Track Pin Soft-Start Pull-Up Current
INTV
CC
Undervoltage Lockout
Minimum Top Gate Off-Time
Minimum Top Gate On-Time
Resistor Between V
OUTS1
, V
OUTS2
and V
FB1
, V
FB2
Pins for Each Output
PGOOD Voltage Low
PGOOD Leakage Current
PGOOD Trip Level
I
PGOOD
= 2mA
V
PGOOD
= 5V
V
FB
with Respect to Set Output Voltage
V
FB
Ramping Negative
V
FB
Ramping Positive
6V < CPWR < 20V
I
CC
= 0mA to 100mA
EXTV
CC
Ramping Positive
I
CC
= 20mA, V
EXTVCC
= 5V
4.4
5.0
–2
–7.5
7.5
5.3
–1.3
4.6
80
200
R
FREQ
= 115kΩ
R
FREQ
= 165kΩ (Note 5)
R
FREQ
= 39.2kΩ
MODE_PLLIN to SGND
PHASMD = SGND
PHASMD = Float
PHASMD = INTV
CC
PHASMD = SGND
PHASMD = Float
PHASMD = INTV
CC
2
900
300
350
250
1000
600
180
180
240
60
90
120
0.5
1100
400
5.6
–3.0
4.8
120
Voltage at V
FB1
Pin
Voltage at V
FB2
Pin
I
OUT
= 0A, V
OUT
= 1.5V
I
OUT
= 0A, V
OUT
= 1.5V
V
FB2
is Gained Back Up by 2× Internal to 0.6V
(Note 6)
V
FB1
Rising, V
FB2
Rising
TRACK/SS1,TRACK/SS2 = 0V
INTV
CC
Falling V
IN
(Note 6)
INTV
CC
Rising V
IN
(Note 6)
(Note 6)
60.05
3.3
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ELECTRICAL CHARACTERISTICS
PARAMETER
CONDITIONS
MIN
0.592
0.296
TYP
0.600
0.3
0
MAX
0.608
0.304
±50
0.660
0.330
UNITS
V
V
nA
V
V
µA
V
V
ns
ns
0.630
0.315
0.645
0.323
1.0
3.7
4.2
90
30
60.4
0.1
4.5
60.75
0.3
2
kΩ
V
µA
%
%
V
%
V
mV
mV
kHz
kHz
kHz
k
Deg
Deg
Deg
Deg
Deg
Deg
V
V
Internal Linear Regulator
DRV
CC
DRV
CC
Load Regulation
V
EXTVCC
V
EXTVCC(DROP)
V
EXTVCC(HYST)
Frequency Nominal
Frequency Low
Frequency High
R
MODE_PLLIN
Channel 2 Phase
Internal DRV
CC
Voltage
DRV
CC
Load Regulation
EXTV
CC
Switchover Voltage
EXTV
CC
Dropout
EXTV
CC
Hysteresis
Nominal Frequency
Lowest Frequency
Highest Frequency
MODE_PLLIN Input Resistance
V
OUT2
Phase Relative to V
OUT1
Phase (Relative to V
OUT1
)
Clock Input High Level to MODE_PLLIN
Clock Input Low Level to MODE_PLLIN
Frequency and Clock Synchronization
CLKOUT Phase
V
PLLIN
High
V
PLLIN
Low
4
4662f
For more information
www.linear.com/LTM4662
LTM4662
The
l
denotes the specifications which apply over the specified internal
operating temperature range (Note 2). Specified as each individual output channel. T
A
= 25°C, V
IN
= 12V and V
RUN1
, V
RUN2
at 5V
unless otherwise noted. Per the typical application in Figure 20.
SYMBOL
f
SYNC
(Each Channel)
VRNG I
LIMIT
t
D(PGOOD)
t
D(PGOOD)
V
TEMP1
, V
TEMP2
T
C
V
TEMP1,2
PARAMETER
Frequency Sync Capture Range
SET Current Limit
Per Channel
Delay from V
FB
Fault (OV/UV) to
PGOOD Falling
Delay from V
FB
Fault (OV/UV Clear)
to PGOOD
TEMP Diode Voltage
V
TEMP
Temperature Coefficient
CONDITIONS
MODE_PLLIN Clock Duty Cycle = 50%
VRNG = INTV
CC
, I
OUT
to 15A, I
LIMIT
~22A
VRNG = SGND, I
OUT
to 7.5A, I
LIMIT
~11A
(Note 6)
(Note 6)
I
TEMP
= 100µA
MIN
250
15
7.5
50
20
0.598
–2.0
TYP
MAX
1000
UNITS
kHz
A
A
s
s
V
mV/°C
ELECTRICAL CHARACTERISTICS
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 LTM4662 is tested under pulsed load conditions such
that T
J
≈ T
A
. The LTM4662E is guaranteed to meet specifications from
0°C to 125°C internal temperature. Specifications over the –40°C to
125°C internal operating temperature range are assured by design,
characterization and correlation with statistical process controls. The
LTM4662I is guaranteed over the full –40°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
impedance and other environmental factors.
Note 3:
Two outputs are tested separately and the same testing condition
is applied to each output.
Note 4:
The switching frequency is programmable from 250kHz to 1000kHz.
Note 5:
LTM4662 device is optimized to operate from 300kHz to 750kHz.
Note 6:
These parameters are tested at wafer sort.
Note 7:
See output current derating curves for different V
IN
, V
OUT
and T
A
.
Note 8:
For 6V ≤ V
IN
≤ 20V, the 3.3 to 5V output current needs to be
limited to 13A/channel. All other input and output combinations are 15A/
channel with recommended switching frequency included in the efficiency
graphs. Derating curves and airflow apply.
For more information
www.linear.com/LTM4662
5
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