uModule Regulator. LTM4644 Datasheet

LTM4644 Regulator. Datasheet pdf. Equivalent


Part LTM4644
Description Quad DC/DC uModule Regulator
Feature LTM4644/LTM4644-1 Quad DC/DC µModule Regulator with Configurable 4A Output Array FEATURES n Quad O.
Manufacture Linear Technology
Datasheet
Download LTM4644 Datasheet


LTM4644/LTM4644-1 Quad DC/DC µModule Regulator with Configur LTM4644 Datasheet
LTM4644/LTM4644-1 Quad DC/DC µModule Regulator with Configur LTM4644-1 Datasheet
Recommendation Recommendation Datasheet LTM4644 Datasheet




LTM4644
LTM4644/LTM4644-1
Quad DC/DC µModule
Regulator with Configurable 4A Output Array
FEATURES
n Quad Output Step-Down µModule® Regulator with 4A
per Output
n Wide Input Voltage Range: 4V to 14V
n 2.375V to 14V with External Bias
n 0.6V to 5.5V Output Voltage
n 4A DC, 5A Peak Output Current Each Channel
n Up to 5.5W Power Dissipation (TA = 60°C, 200 LFM,
No Heat Sink)
n ±1.5% Total Output Voltage Regulation
n Current Mode Control, Fast Transient Response
n Parallelable for Higher Output Current
n Output Voltage Tracking
n Internal Temperature Sensing Diode Output
n External Frequency Synchronization
n Overvoltage, Current and Temperature Protection
n 9mm × 15mm × 5.01mm BGA Package
APPLICATIONS
n Multirail Point of Load Regulation
n FPGAs, DSPs and ASICs Applications
All registered trademarks and trademarks are the property of their respective owners.
DESCRIPTION
The LTM®4644/LTM4644-1 is a quad DC/DC step-down
µModule (micromodule) regulator with 4A per output.
Outputs can be paralleled in an array for up to 16A capabil-
ity. Included in the package are the switching controllers,
power FETs, inductors and support components. Operating
over an input voltage range of 4V to 14V or 2.375V to 14V
with an external bias supply, the LTM4644/LTM4644-1
supports an output voltage range of 0.6V to 5.5V. Its
high efficiency design delivers 4A continuous (5A peak)
output current per channel. Only bulk input and output
capacitors are needed.
Top Feedback Resistor
from VOUT-to-VFB
(one resistor per channel)
Application
LTM4644
Integrated
60.4k 0.5%
Resistor
General
Applications
Configurable Output Array*
4A
4A
8A
4A 4A
4A 4A
* Note 4
Click to view associated TechClip Videos.
LTM4644-1
External (to be added on
PCB)
To Interface with
PMBus power system
management supervisory
ICs such as the LTC2975
12A 16A
4A
TYPICAL APPLICATION
4V to 14V Input, Quad 0.9V, 1V, 1.2V and 1.5V Output DC/DC µModule Regulator*
4V to 14V
22µF
×2
16V
VIN1 CLKIN
SVIN1
CLKOUT VOUT1
FB1
RUN1
PGOOD1
LTM4644
VIN2
SVIN2
VOUT2
FB2
RUN2
PGOOD2
40.2k
60.4k
1.5V/4A
47µF
4V
1.2V/4A
47µF
4V
VIN3
SVIN3
RUN3
VOUT3
FB3
PGOOD3
90.9k
1V/4A
47µF
4V
VIN4
SVIN4
RUN4
TEMP
SGND
VOUT4
FB4
PGOOD4
GND
4644 TA01a
121k
0.9V/4A
47µF
4V
*TA = 60°C, 200LFM, NO HEAT SINK
Document Feedback
For more information www.analog.com
1.5V Output Efficiency and
Power Loss (Each Channel)
95 2
90
85 1.5
80
75 1
70
65 0.5
60
55
0
VIN = 5V
VIN = 12V
0
1234
LOAD CURRENT (A)
4644 TA01b
Rev. F
1



LTM4644
LTM4644/LTM4644-1
ABSOLUTE MAXIMUM RATINGS
(Note 1)
VIN, SVIN (Per Channel)............................... –0.3V to 15V
VOUT (Per Channel) (Note 3).............–0.3V to SVIN or 6V
RUN (Per Channel)...................................... –0.3V to 15V
INTVCC (Per Channel)................................ –0.3V to 3.6V
PGOOD, MODE, TRACK/SS,
FB (Per Channel).................................... –0.3V to INTVCC
CLKOUT (Note 3), CLKIN........................ –0.3V to INTVCC
Internal Operating Temperature Range (Note 2, 5)
E and I-Grade...................................... –40°C to 125°C
MP-Grade........................................... –55°C to 125°C
Storage Temperature Range................... –65°C to 150°C
Peak Solder Reflow Body Temperature.................. 245°C
PIN CONFIGURATION
A
GND
B
VOUT2
GND
VIN2
VOUT3
GND
VIN3
VOUT4
GND
C
D
E
F
G
H
J
K
L
TOP VIEW
VIN1 TRACK/SS1
1234567
VOUT1
GND
FB1
PGOOD2 PGOOD1 INTVCC1
PGOOD3 TEMP INTVCC2
INTVCC3
PGOOD4 CLKOUT
SVIN1
MODE1
COMP1
RUN1
CLKIN
TRACK/SS2
FB2
COMP2 MSVOIND2E2
RUN2
SGND
TRACK/SS3
FB3
MSVOIND3E3
COMP3
RUN3
FB4
RUN4
TRACK/SS4
INTVCC4
COMP4
VIN4 SVIN4 MODE4
BGA PACKAGE
77-LEAD (9mm × 15mm × 5.01mm)
TJMAX = 125°C, θJCtop = 17°C/W, θJCbottom = 2.75°C/W,
θJB + θBA = 11°C/W, θJA = 10°C/W
θ VALUES PER JESD 51-12
WEIGHT = 1.9g
ORDER INFORMATION
PART MARKING*
PART NUMBER
PAD OR BALL FINISH
DEVICE
FINISH CODE
LTM4644EY#PBF
SAC305 (RoHS)
LTM4644Y
e1
LTM4644IY#PBF
SAC305 (RoHS)
LTM4644Y
e1
LTM4644MPY#PBF
SAC305 (RoHS)
LTM4644Y
e1
LTM4644IY
SnPb (63/37)
LTM4644Y
e0
LTM4644MPY
SnPb (63/37)
LTM4644Y
e0
LTM4644EY-1#PBF
SAC305 (RoHS)
LTM4644Y-1
e1
LTM4644IY-1#PBF
SAC305 (RoHS)
LTM4644Y-1
e1
LTM4644IY-1
SnPb (63/37)
LTM4644Y-1
e0
Note: The LTM4644-1 does not include the internal top feedback resistor.
PACKAGE
TYPE
BGA
BGA
BGA
BGA
BGA
BGA
BGA
BGA
MSL
RATING
3
3
3
3
3
3
3
3
TEMPERATURE RANGE
(SEE NOTE 2)
–40°C to 125°C
–40°C to 125°C
–55°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
• Contact the factory for parts specified with wider operating temperature
ranges. *Pad or ball finish code is per IPC/JEDEC J-STD-609.
Recommended LGA and BGA PCB Assembly and Manufacturing
Procedures
LGA and BGA Package and Tray Drawings
Rev. F
2 For more information www.analog.com







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