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LTM4620 Datasheet

Dual 13A or Single 26A DC/DC iModule Regulator


LTM4620 Datasheet Preview


LTM4620
Dual 13A or Single 26A
DC/DC µModule Regulator
Features
n Complete Standalone Dual Output Power Supply
n Dual 13A or Single 26A Output
n Wide Input Voltage Range: 4.5V to 16V
n Output Voltage Range: 0.6V to 2.5V
n ±1.5% Maximum Total DC Output Error
n Multiphase Current Sharing with Multiple
LTM4620s Up to 100A
n Differential Remote Sense Amplifier
n Current Mode Control/Fast Transient Response
n Adjustable Switching Frequency
n Overcurrent Foldback Protection
n Frequency Synchronization
n Internal Temperature Sensing Diode Output
n Output Overvoltage Protection
n Low Profile (15mm × 15mm × 4.41mm) LGA Package
Applications
n Telecom and Networking Equipment
n Storage and ATCA Cards
n Industrial Equipment
Video TechClip
Click and Learn
100A and 26A Thermal Performance
Current Sharing
Short-Circuit Protection
Description
The LTM®4620 is a complete dual 13A 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 16V, the LTM4620 supports two outputs
each with an output voltage range of 0.6V to 2.5V, set by a
single external resistor. Its high efficiency design delivers
up to 13A continuous current for each output. Only a few
input and output capacitors are needed.
The device supports frequency synchronization, multi-
phase operation, Burst Mode operation and output voltage
tracking for supply rail sequencing and has an onboard
temperature diode for device temperature 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 proprietary
spacewww.DataSheet.net/ saving and thermally enhanced 15mm × 15mm ×
4.41mm LGA package with integrated top-side heat sink.
The LTM4620 is RoHS compliant with a 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.
Typical Application
26A, 1.2V Output DC/DC µModule® Regulator
4.7µF
INTVCC
5k
VIN 4.5V TO 16V
10k*
22µF
× 4 120k
25V
5.1V*
0.1µF
121k
* PULL-UP RESISTOR AND
ZENER ARE OPTIONAL
MODE_PLLIN CLKOUT INTVCC
VIN
TEMP
RUN1
RUN2
TRACK1
TRACK2
fSET
PHASMD
LTM4620
SGND GND
DIFFP
EXTVCC PGOOD1
VOUT1
VOUTS1
DIFFOUT
SW1
VFB1
VFB2
COMP1
COMP2
VOUTS2
VOUT2
SW2
PGOOD2
DIFFN
PGOOD
100µF +
6.3V
470µF
6.3V
60.4k
100µF +
6.3V
470µF
6.3V
VOUT
1.2V AT 26A
PGOOD
4620 TA01a
1.2V Efficiency vs IOUT
90
80
70
60
50
5VIN /500kHz
40 12VIN/500kHz
0 2 4 6 8 10 12 14 16 18 20 22 24 26
OUTPUT CURRENT (A)
4620 TA01b
4620f
1
Datasheet pdf - http://www.DataSheet4U.co.kr/
Page 1

LTM4620
Absolute Maximum Ratings
(Note 1)
VIN (Note 8)................................................ –0.3V to 18V
VSW1, VSW2.................................................... –1V to 18V
PGOOD1, PGOOD2, RUN1, RUN2,
INTVCC, EXTVCC............................................ –0.3V to 6V
MODE_PLLIN, fSET, TRACK1, TRACK2,
DIFFOUT, PHASMD................................. –0.3V to INTVCC
VOUT1, VOUT2, VOUTS1, VOUTS2....................... –0.3V to 6V
DIFFP, DIFFN........................................... –0.3V to INTVCC
COMP1, COMP2, VFB1, VFB2 (Note 6)........ –0.3V to 2.7V
INTVCC Peak Output Current.................................100mA
Internal Operating Temperature Range
(Note 2).............................................. –40°C to 125°C
Storage Temperature Range.................... –55°C to 125°C
Peak Package Body Temperature........................... 250°C
Pin Configuration
TOP VIEW
TEMP EXTVCC
M
L
VIN
K
J
CLKOUT
SW1
PHASMD
MODE_PLLIN
H
G
F
TRACK1 E
VFB1 D
VOUTS1
C
B
A
RUN1 SGND
GND COMP1 COMP2
SGND VFB2 TRACK2
GND
fSET SGND VOUTS2
VOUT1
GND
VOUT2
1 2 3 4 5 6 7 8 9 10 11
LGA PACKAGE
144-LEAD (15mm × 15mm × 4.41mm)
TJMAX = 125°C, ΘJA = 7°C/W, ΘJCbottom = 1.5°C/W,
ΘJCtop = 3.7°C/W, ΘJB + ΘBA 7°C/W
Θ VALUES DEFINED PER JESD 51-12
12
SINWTV2CC
PGOOD1
PGOOD2
RUN2
DDIIFFFFPOUT
DIFFN
Order Information
www.DataSheet.net/
LEAD FREE FINISH
TRAY
PART MARKING*
PACKAGE DESCRIPTION
TEMPERATURE RANGE
LTM4620EV#PBF
LTM4620EV#PBF
LTM4620V
144-Lead (15mm × 15mm × 4.41mm) LGA –40°C to 125°C
LTM4620IV#PBF
LTM4620IV#PBF
LTM4620V
144-Lead (15mm × 15mm × 4.41mm) LGA –40°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/
E lectrical Characteristics The l denotes the specifications which apply over the specified internal
operating temperature range (Note 2). Specified as
unless otherwise noted. Per the typical application
each individual
in Figure 23.
output
channel.
TA
=
25°C,
VIN
=
12V
and
VRUN1,
VRUN2
at
5V
SYMBOL
PARAMETER
VIN
VOUT
VOUT1(DC),
VOUT2(DC)
Input Specifications
Input DC Voltage
Output Voltage
Output Voltage, Total Variation with
Line and Load
VRUN1, VRUN2
RUN Pin On/Off Threshold
VRUN1HYS, VRUN2HYS RUN Pin On Hysteresis
CONDITIONS
(Note 8)
4C7IN0µ=F2P2OµFSC×A3P,,CVOOUUTT
= 100µF
= 1.5V
×
1
Ceramic,
RUN Rising
MIN
l 4.5
l 0.6
l 1.477
1.1
TYP MAX UNITS
16 V
2.5 V
1.5 1.523
V
1.25 1.40
150
V
mV
2
4620f
Datasheet pdf - http://www.DataSheet4U.co.kr/
Page 2

LTM4620
E lectrical Characteristics The l denotes the specifications which apply over the specified internal
operating temperature range (Note 2). Specified as
unless otherwise noted. Per the typical application
each individual
in Figure 23.
output
channel.
TA
=
25°C,
VIN
=
12V
and
VRUN1,
VRUN2
at
5V
SYMBOL
IINRUSH(VIN)
IQ(VIN)
PARAMETER
Input Inrush Current at Start-Up
Input Supply Bias Current
IS(VIN)
Input Supply Current
Output Specifications
IOUT1(DC), IOUT2(DC)
ΔΔVVOOUUTT12((LLIINNEE))//VVOOUUTT12
ΔΔVVOOUUTT12//VVOOUUTT12
VOUT1(AC), VOUT2(AC)
Output Continuous Current Range
Line Regulation Accuracy
Load Regulation Accuracy
Output Ripple Voltage
fS (Each Channel)
fSYNC
(Each Channel)
∆VOUTSTART
(Each Channel)
(tSETaAcRhT Channel)
Output Ripple Voltage Frequency
SYNC Capture Range
Turn-On Overshoot
Turn-On Time
∆VOUT(LS)
(Each Channel)
Peak Deviation for Dynamic Load
tSETTLE
(Each Channel)
IOUT(PK)
(Each Channel)
Control Section
VFB1, VFB2
IFB1, IFB2
VOVL
TRACK1 (I),
TRACK2 (I)
UVLO
Settling Time for Dynamic Load
Step
Output Current Limit
Voltage at VFB Pins
Feedback Overvoltage Lockout
Track Pin Soft-Start Pull-Up Current
Undervoltage Lockout
UVLO Hysteresis
tON(MIN)
RFBHI1, RFBHI2
LVoPwGOOD1, VPGOOD2
IPGOOD
Minimum On-Time
aRnedsiVstFoBr1,BVeFtwB2eePninVsOfUoTrSE1a, cVhOOUTuSt2put
PGOOD Voltage Low
PGOOD Leakage Current
CONDITIONS
VCIOOIUNUT=T==1021AV0,0CµIFN
×=32, 2VµOFUT×13,=C1S.S5V=,
0.01µF,
VOUT2 =
1.5V,
VIN = 12V, VOUT = 1.5V, Burst Mode Operation
VIN = 12V, VOUT = 1.5V, Pulse-Skipping Mode
VIN = 12V, VOUT= 1.5V, Switching Continuous
Shutdown, RUN = 0, VIN = 12V
VVIINN
=
=
51V2,VV, VOUOTUT==1.15.V5,VI,OIUOTUT==131A3A
VIN = 12V, VOUT = 1.5V (Notes 7, 8)
IVOOUUTT==01A.5fVo,rVEIaNcfhroOmut4p.u5tV, to 16V
For
VIN
=Ea1c2hVO(uNtoptuet,7V)OUT
=
1.5V,
0A
to
13A
For Each Output, IOUT = 0A, COUT = 100µF ×3/
X7R/Ceramic, 470µF POSCAP, VIN = 12V,
VOUT = 1.5V, Frequency = 400kHz
VIN = 12V, VOUT = 1.5V, fSET = 1.25V (Note 4)
COUT = 100µF/X5R/Ceramic, 470µF POSCAP,
V = 1.5V, I = 0A V = 12VOUT
OUT
www.DataSheet.net/
IN
NCOoULTo=ad1,0T0RµAF/CXK5/RS/SCewriatmh 0ic.,0417µ0FµtFo
POSCAP,
GND,
VIN = 12V
Load: 0% to 50% to 0% of Full Load
COUT = 22µF ×3/X5R/Ceramic, 470µF POSCAP
VIN = 12V, VOUT = 1.5V
Load: 0% to 50% to 0% of Full Load,
VIN = 12V, COUT = 100µF, 470µF POSCAP
VIN = 12V, VOUT = 1.5V
IOUT = 0A, VOUT = 1.5V
(Note 6)
TRACK1 (I),TRACK2 (I) Start at 0V
VVIINN
Falling
Rising
(Note 6)
IPGOOD = 2mA
VPGOOD = 5V
l
l
l
l
MIN
0
400
0.592
0.64
1
60.05
TYP MAX UNITS
1A
5
15
65
50
4.6
1.853
mA
mA
mA
µA
A
A
13
0.01 0.025
A
%/V
0.5 0.75
%
15 mVP-P
500
780
10
5
kHz
kHz
mV
ms
30 mV
20 µs
20 A
0.600
–5
0.66
1.25
0.606
–20
0.68
1.5
3.3
3.9
0.6
90
60.4 60.75
0.1 0.3
±5
V
nA
V
µA
V
V
V
ns
kΩ
V
µA
4620f
3
Datasheet pdf - http://www.DataSheet4U.co.kr/
Page 3

LTM4620
E lectrical Characteristics The l denotes the specifications which apply over the specified internal
operating temperature range (Note 2). Specified as
unless otherwise noted. Per the typical application
each individual
in Figure 23.
output
channel.
TA
=
25°C,
VIN
=
12V
and
VRUN1,
VRUN2
at
5V
SYMBOL
VPGOOD
PARAMETER
PGOOD Trip Level
INTVCC Linear Regulator
VINTVCC
Internal VCC Voltage
VINTVCC
Load Regulation
INTVCC Load Regulation
VEXTVCC
EXTVCC Switchover Voltage
VEXTVCC(DROP)
EXTVCC Dropout
VEXTVCC(HYST)
EXTVCC Hysteresis
Oscillator and Phase-Locked Loop
Frequency Nominal Nominal Frequency
Frequency Low
Lowest Frequency
Frequency High
Highest Frequency
fSET
RMODE_PLLIN
CLKOUT
Frequency Set Current
MODE_PLLIN Input Resistance
Phase (Relative to VOUT1)
CLK High
CLK Low
Clock High Output Voltage
Clock Low Output Voltage
Differential Amplifier
AV Differential
Amplifier
Gain
RIN
VOS
PSRR Differential
Amplifier
Input Resistance
Input Offset Voltage
Power Supply Rejection Ratio
ICL
VOUT(MAX)
GBW
Maximum Output Current
Maximum Output Voltage
Gain Bandwidth Product
VTEMP Temp Diode Diode Connected PNP
TC Temperature Coefficient
CONDITIONS
VFB with Respect to Set Output Voltage
VFB Ramping Negative
VFB Ramping Positive
6V < VIN < 16V
ICC = 0mA to 50mA
EXTVCC Ramping Positive
ICC = 20mA, VEXTVCC = 5V
fSET = 1.2V
fSET = 0V (Note 5)
fSET > 2.4V, Up to INTVCC
PHASMD = GND
PHASMD = Float
PHASMD = INTVCC
www.DataSheet.net/
Measured at DIFFP Input
VDIFFP = VDIFFOUT = 1.5V, IDIFFOUT = 100µA
5V < VIN < 16V
IDIFFOUT = 300µA
I = 100µA
MIN TYP MAX UNITS
–10 %
10 %
4.8 5 5.2 V
0.5 2
%
4.5 4.7
V
50 100
mV
200 mV
450
500 550
kHz
210
250 290
kHz
700
780 860
kHz
9
10 11
µA
250 kΩ
60 Deg
90 Deg
120 Deg
2V
0.2 V
1
80
90
INTVCC – 1.4
2
3
0.6
–2.2
V/V
kΩ
3 mV
dB
mA
V
MHz
V
mV/°C
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 LTM4620 is tested under pulsed load conditions such that
TJ ≈ TA. The LTM4620E 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
LTM4620I 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.
4
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 400kHz to 750kHz.
Note 5: LTM4620 device is designed to operate from 400kHz to 750kHz
Note 6: These parameters are tested at wafer sort.
Note 7: See output current derating curves for different VIN, VOUT and TA.
Note 8: Output current limitations. For 10V ≤ VIN ≤ 16V, the 2.5V output
current needs to be limited to 10A/channel, switching frequency = 750kHz.
Derating curves apply. For 5V ≤ VIN ≤ 9V, the 2.5V output current needs
to be limited to 12A/channel, switching frequency = 750kHz. Derating
curves apply. All other input and output combinations are 13A/channel
with recommended switching frequency included in the efficiency graphs.
Derating curves apply.
4620f
Datasheet pdf - http://www.DataSheet4U.co.kr/
Page 4
Part Number LTM4620
Manufactur Linear
Description Dual 13A or Single 26A DC/DC iModule Regulator
Total Page 30 Pages
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