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LTM4625IY#PBF

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24P25-P26
LTM4625
19
4625fa
For more information www.linear.com/LTM4625
APPLICATIONS INFORMATION
Table 7. Output Voltage Response vs Component Matrix (Refer to Figure 20)
C
IN
PART NUMBER VALUE C
OUT1
PART NUMBER VALUE C
OUT2
PART NUMBER VALUE
Murata GRM21BR61E106KA73L 10µF, 25V,
0805, X5R
Murata GRM21BR60J476ME15 47µF, 6.3V,
0805, X5R
Sanyo 4TPE100MZB 4V 100µF
Taiyo Yuden TMK212BBJ106KG-T 10µF, 25V,
0805, X5R
Taiyo Yuden JMK212BJ476MG-T 47µF, 6.3V,
0805, X5R
Murata GRM31CR61E226ME15L 22µF, 25V,
1206, X5R
Taiyo Yuden TMK316BBJ
226ML-T 22µF, 25V,
1206, X5R
V
OUT
(V)
C
IN
(CERAMIC)
(µF)
C
IN
(BULK)
C
OUT1
(CERAMIC)
(µF)
C
OUT2
(BULK)
(µF)
C
FF
(pF)
V
IN
(V)
DROOP
(mV)
P-P DERIVATION
(mV)
RECOVERY
TIME (µs)
LOAD
STEP (A)
LOAD STEP
SLEW RATE
(A/µs)
R
FB
(kΩ)
1 10 47 5, 12 5 72 40 1 1 90.9
1 10 100 10 5, 12 5 60 40 1 1 90.9
1 10 47 5, 12 5 127 40 2 1 90.9
1 10 100 10 5, 12 5 90
40 2 1 90.9
1.2 10 47 5, 12 5 76 40 1 1 60.4
1.2 10 100 10 5, 12 5 65 40 1 1 60.4
1.2 10 47 5, 12 5 145 40 2 1 60.4
1.2 10 100 10 5, 12 5 103 40 2 1 60.4
1.5 10 47 5, 12 5 80 40 1 1 40.2
1.5 10 100 10 5, 12 5 70 40 1 1 40.2
1.5 10 47 5, 12 5 161 40 2 1 40.2
1.5 10 100 10 5, 12 5 115 40 2 1 40.2
1.8 10 47 5, 12 5 95 40 1 1 30.1
1.8 10 100 10 5, 12 5 80 40 1 1 30.1
1.8 10 47 5,
12 5 177 40 2 1 30.1
1.8 10 100 10 5, 12 5 128 40 2 1 30.1
2.5 10 47 5, 12 5 125 40 1 1 19.1
2.5 10 100 10 5, 12 5 100 50 1 1 19.1
2.5 10 47 5, 12 5 225 40 2 1 19.1
2.5 10 100 10 5, 12 5 161 50 2 1 19.1
3.3 10 47 5, 12 5 155 40 1 1 13.3
3.3 10 100 10 5, 12 5 122 60 1 1 13.3
3.3 10 47 5, 12 5 285 40 2 1 13.3
3.3 10 100 10 5, 12 5 198 60 2 1 13.3
5 10 47 5, 12 5 220 40 1 1 8.25
5 10
47 5, 12 5 420 40 2 1 8.25
LTM4625
20
4625fa
For more information www.linear.com/LTM4625
APPLICATIONS INFORMATION
Figure 19. Recommended PCB Layout
Safety Considerations
The LTM4625 modules do not provide galvanic isolation
from V
IN
to V
OUT
. There is no internal fuse. If required,
a slow blow fuse with a rating twice the maximum input
current needs to be provided to protect each unit from
catastrophic failure. The device does support thermal
shutdown and over current protection.
Layout Checklist/Example
The high integration of LTM4625 makes the PCB board
layout very simple and easy. However, to optimize its
electrical and thermal performance, some layout consid-
erations are still necessary.
•
Use large PCB copper areas for high current paths,
including V
IN
, GND and V
OUT
. It helps to minimize the
PCB conduction loss and thermal stress.
•
Place high frequency ceramic input and output capaci-
tors next to the V
IN
, PGND and V
OUT
pins to minimize
high frequency noise.
•
Place a dedicated power ground layer underneath the
unit.
•
To minimize the via conduction loss and reduce module
thermal stress, use multiple vias for interconnection
between top layer and other power layers.
•
Do not put via directly on the pad, unless they are
capped or plated over.
•
Use a separated SGND ground copper area for com-
ponents connected to signal pins. Connect the SGND
to GND underneath the unit.
•
Bring out test points on the signal pins for monitoring.
•
Keep separation between CLKIN, CLKOUT and FREQ pin
traces to minimize possibility of noise due to crosstalk
between these signals.
Figure 19 gives a good example of the recommended layout.
V
IN
C
OUT
GND
V
OUT
R
FB
4625 F19
GND
C
IN
LTM4625
21
4625fa
For more information www.linear.com/LTM4625
APPLICATIONS INFORMATION
Figure 20. 4V
IN
to 20V
IN
, 1.5V Output at 5A Design Figure 21. 2.375V
IN
to 5V
IN
, 1V at 5A Output Design
Figure 22. 4V
IN
to 20V
IN
, 3.3V Output with 2MHz
External Clock
Figure 23. 4V
IN
to 20V
IN
, Tw o Phases, 1.5V at 10A Design
V
IN
SV
IN
RUN
INTV
CC
MODE
PHMODE
TRACK/SS
PGOOD
LTM4625
CLKINFREQ CLKOUT
V
OUT
10µF
25V
47µF
6.3V
V
IN
4V TO 20V
V
OUT
1.5V
5A
FB
COMP
GND
40.2k
SGND
4625 F20
0.1µF
V
IN
SV
IN
RUN
INTV
CC
MODE
PHMODE
TRACK/SS
PGOOD
LTM4625
CLKIN
CLKOUTFREQ
5V
V
OUT
10µF
25V
1µF
6.3V
47µF
6.3V
V
IN
2.375V TO 5V
V
OUT
1V
5A
FB
COMP
GND
90.9k
SGND
4624 F21
0.1µF
V
IN
SV
IN
RUN
INTV
CC
MODE
PHMODE
TRACK/SS
PGOOD
LTM4625
CLKIN
2MHz
CLOCK
162k
CLKOUTFREQ
V
OUT
10µF
25V
47µF
6.3V
V
IN
4V TO 20V
V
OUT
3.3V
5A
FB
COMP
GND
13.3k
SGND
4624 F22
0.1µF
V
IN
SV
IN
RUN
INTV
CC
MODE
PHMODE
TRACK/SS
PGOOD
LTM4625
CLKIN
V
OUT
10µF
25V
×2
47µF
6.3V
×2
20.1k
V
IN
4V TO 20V
V
OUT
1.5V
10A
FB
COMP
GND
4625 F23
SGND
CLKOUTFREQ
0.1µF
V
IN
SV
IN
RUN
INTV
CC
MODE
PHMODE
TRACK/SS
PGOOD
LTM4625
CLKIN CLKOUTFREQ
V
OUT
FB
COMP
GND SGND
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24P25-P26

LTM4625IY#PBF

Mfr. #:
Buy LTM4625IY#PBF
Manufacturer:
Analog Devices / Linear Technology
Description:
Switching Voltage Regulators 20V, 5A Step-Down Module Regulator
Lifecycle:
New from this manufacturer.
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