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LTM4608EV#PBF

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24P25-P26
LTM4608
1
4608fd
Typical applicaTion
FeaTures
applicaTions
DescripTion
Low V
IN
, 8A DC/DC µModule
Regulator with Tracking, Margining,
and Frequency Synchronization
The LTM
®
4608 is a complete 8A switch mode DC/DC
power supply. Included in the package are the switching
controller, power FETs, inductor and all support compo-
nents. Operating over an input voltage range of 2.7V to
5.5V, the LTM4608 supports an output voltage range of
0.6V to 5V, set by a single external resistor. This high ef-
ficiency design delivers up to 8A continuous current (10A
peak). Only bulk input and output capacitors are needed.
The low profile package (2.82mm) enables utilization
of unused space on the back side of PC boards for high
density point-of-load regulation. The high switching
frequency and a current mode architecture enable a very
fast transient response to line and load changes without
sacrificing stability. The device supports frequency syn-
chronization, programmable multiphase and/or spread
spectrum operation, output voltage tracking for supply
rail sequencing and voltage margining.
Fault protection features include overvoltage protection,
overcurrent protection and thermal shutdown. The power
module is offered in a compact and thermally enhanced
9mm × 15mm × 2.82mm LGA package. The LTM4608 is
RoHS compliant with Pb-free finish.
L, LT, LTC, LTM, Linear Technology, the Linear logo, µModule, Burst Mode and PolyPhase are
registered trademarks and LTpowerCAD is a trademark of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
2.7V to 5.5V Input to 1.8V Output DC/DC µModule
®
Regulator
n
Complete Standalone Power Supply
n
±1.5% Output Voltage Regulation
n
2.7V to 5.5V Input Voltage Range
n
8A DC, 10A Peak Output Current
n
0.6V Up to 5V Output
n
Output Voltage Tracking and Margining
n
Power Good Tracking and Margining
n
Multiphase Operation
n
Parallel Current Sharing
n
Onboard Frequency Synchronization
n
Spread Spectrum Frequency Modulation
n
Overcurrent/Thermal Shutdown Protection
n
Small Surface Mount Footprint, Low Profile
(9mm × 15mm × 2.82mm) LGA Package
n
Telecom, Networking and Industrial Equipment
n
Storage Systems
n
Point of Load Regulation
Efficiency vs Load Current
For easier board layout and PCB assembly due to in-
creased spacing between land grid pads, please refer
to the LTM4608A.
LOAD CURRENT (A)
0
70
EFFICIENCY (%)
75
80
85
90
95
100
2 4 6 8
4608 TA01b
10
V
OUT
= 1.8V
V
IN
= 5V
V
IN
= 3.3V
V
IN
SV
IN
SW
RUN
PLLLPF
TRACK
V
OUT
FB
I
TH
I
THM
PGOOD
MGN
CLKOUT GND
CLKIN
CLKIN
4.87k
4608 TA01a
100µF10µF
PGOOD
V
OUT
1.8V
V
IN
2.7V TO 5.5V
LTM4608
SGND
LTM4608
2
4608fd
pin conFiguraTion
absoluTe MaxiMuM raTings
V
IN
, SV
IN
...................................................... –0.3V to 6V
CLKOUT ....................................................... –0.3V to 2V
PGOOD, PLLLPF, CLKIN, PHMODE, MODE .. –0.3V to V
IN
I
TH
, I
THM
, RUN, FB, TRACK, MGN, BSEL ..... –0.3V to V
IN
V
OUT
, V
SW
..................................... –0.3V to (V
IN
+ 0.3V)
Operating Temperature Range (Note 2)....–40°C to 85°C
Junction Temperature ........................................... 125°C
Storage Temperature Range .................. –55°C to 125°C
(Note 1)
GND
GND GND
SW
A
1
2
3
4
5
6
7
8
9
10
11
B C D
LGA PACKAGE
68-LEAD (15mm × 9mm × 2.82mm)
E F G
CNTRL
CNTRL
V
OUT
V
IN
TOP VIEW
T
JMAX
= 125°C, θ
JA
= 25°C/W, θ
JCbottom
= 7°C/W, θ
JCtop
= 50°C/W, WEIGHT = 1.0g
orDer inForMaTion
elecTrical characTerisTics
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
V
IN(DC)
Input DC Voltage
l
2.7 5.5 V
V
OUT(DC)
Output Voltage
C
IN
= 10µF × 1, C
OUT
= 100µF Ceramic,
100µF POSCAP, R
FB
= 6.65k, MODE = 0V
V
IN
= 2.7V to 5.5V, V
OUT
= 1.5V, I
OUT
= 0A
l
1.475
1.468
1.49
1.49
1.505
1.512
V
V
Input Specifications
V
IN(UVLO)
Undervoltage Lockout Threshold SV
IN
Rising
SV
IN
Falling
2.05
1.85
2.2
2.0
2.35
2.15
V
V
The l denotes the specifications which apply over the full operating
temperature range (Note 2), otherwise specifications are at T
A
= 25°C. V
IN
= 5V unless otherwise noted. See Figure 1.
LEAD FREE FINISH PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE (NOTE 2)
LTM4608EV#PBF LTM4608V
68-Lead (15mm × 9mm × 2.82mm) LGA
–40°C to 85°C
LTM4608IV#PBF LTM4608V
68-Lead (15mm × 9mm × 2.82mm) LGA
–40°C to 85°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/
For easier board layout and PCB assembly due to in-
creased spacing between land grid pads, please refer
to the LTM4608A.
LTM4608
3
4608fd
elecTrical characTerisTics
The l denotes the specifications which apply over the full operating
temperature range (Note 2), otherwise specifications are at T
A
= 25°C. V
IN
= 5V unless otherwise noted. See Figure 1.
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
I
Q(VIN)
Input Supply Bias Current V
IN
= 3.3V, V
OUT
= 1.5V, No Switching, MODE = V
IN
V
IN
= 3.3V, V
OUT
= 1.5V, No Switching, MODE = 0V
V
IN
= 3.3V, V
OUT
= 1.5V, Switching Continuous
400
1.15
55
µA
mA
mA
V
IN
= 5V, V
OUT
= 1.5V, No Switching, MODE = V
IN
V
IN
= 5V, V
OUT
= 1.5V, No Switching, MODE = 0V
V
IN
= 5V, V
OUT
= 1.5V, Switching Continuous
450
1.3
75
µA
mA
mA
Shutdown, RUN = 0, V
IN
= 5V 1 µA
I
S(VIN)
Input Supply Current V
IN
= 3.3V, V
OUT
= 1.5V, I
OUT
= 8A
V
IN
= 5V, V
OUT
= 1.5V, I
OUT
= 8A
4.5
2.93
A
A
Output Specifications
I
OUT(DC)
Output Continuous Current Range
(See Output Current Derating
Curves for Different V
IN
, V
OUT
and T
A
)
V
OUT
= 1.5V
V
IN
= 3.3V, 5.5V
V
IN
= 2.7V
0
0
8
5
A
A
ΔV
OUT(LINE)
V
OUT
Line Regulation Accuracy V
OUT
= 1.5V, V
IN
from 2.7V to 5.5V, I
OUT
= 0A
l
0.1 0.2 %/V
ΔV
OUT(LOAD)
V
OUT
Load Regulation Accuracy V
OUT
= 1.5V
V
IN
= 3.3V, 5.5V, I
LOAD
= 0A to 8A
V
IN
= 2.7V, I
LOAD
= 0A to 5A
l
l
0.3
0.3
0.75
0.75
%
%
V
OUT(AC)
Output Ripple Voltage I
OUT
= 0A, C
OUT
= 100µF/X5R/Ceramic, V
IN
= 5V,
V
OUT
= 1.5V
10
mV
P-P
f
S
Switching Frequency I
OUT
= 8A, V
IN
= 5V, V
OUT
= 1.5V 1.3 1.5 1.7 MHz
f
SYNC
SYNC Capture Range 0.75 2.25 MHz
ΔV
OUT(START)
Turn-On Overshoot C
OUT
= 100µF, V
OUT
= 1.5V, I
OUT
= 0A
V
IN
= 3.3V
V
IN
= 5V
10
10
mV
mV
t
START
Turn-On Time C
OUT
= 100µF, V
OUT
= 1.5V, V
IN
= 5V
I
OUT
=1A Resistive Load, Track = V
IN
100
µs
ΔV
OUT(LS)
Peak Deviation for Dynamic Load Load: 0% to 50% to 0% of Full Load,
C
OUT
= 100µF Ceramic, 100µF POSCAP,
V
IN
= 5V, V
OUT
= 1.5V
15 mV
t
SETTLE
Settling Time for Dynamic Load
Step
Load: 0% to 50% to 0% of Full Load, V
IN
= 5V,
V
OUT
= 1.5V, C
OUT
= 100µF
10 µs
I
OUT(PK)
Output Current Limit C
OUT
= 100µF
V
IN
= 2.7V, V
OUT
= 1.5V
V
IN
= 3.3V, V
OUT
= 1.5V
V
IN
= 5V, V
OUT
= 1.5V
8
11
13
A
A
A
Control Section
V
FB
Voltage at FB Pin I
OUT
= 0A, V
OUT
= 1.5V, V
IN
= 2.7V to 5.5V
l
0.592
0.589
0.596
0.596
0.600
0.603
V
V
SS Delay Internal Soft-Start Delay 90 µs
I
FB
0.2 µA
V
RUN
RUN Pin On/Off Threshold RUN Rising
RUN Falling
1.4
1.3
1.55
1.4
1.7
1.5
V
V
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LTM4608EV#PBF

Mfr. #:
Buy LTM4608EV#PBF
Manufacturer:
Analog Devices / Linear Technology
Description:
Switching Voltage Regulators 2.7VINMIN, 8A Step-down Module Regulator
Lifecycle:
New from this manufacturer.
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