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LTM8048MPY#PBF.

DC/DC CONVERTER ISOLATED FB UMODULE BG

厂商名称：Linear ( ADI )

厂商官网：http://www.analog.com/cn/index.html

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LTM8048
3.1V
IN
to 32V
IN
Isolated
µModule DC/DC Converter
with LDO Post Regulator
FeaTures
n
n
n
n
DescripTion
The LTM
®
8048 is an isolated flyback µModule DC/DC
converter with LDO post regulator. The LTM8048 has an
isolation rating of 725VDC. Included in the package are
the switching controller, power switches, transformer, and
all support components. Operating over an input voltage
range of 3.1V to 32V, the LTM8048 supports an output
voltage range of 2.5V to 13V, set by a single resistor. There
is also a linear post regulator whose output voltage is ad-
justable from 1.2V to 12V as set by a single resistor. Only
output, input, and bypass capacitors are needed to finish
the design. Other components may be used to control the
soft-start control and biasing.
The LTM8048 is packaged in a thermally enhanced, com-
pact (11.25mm
×
9mm
×
4.92mm) over-molded ball grid
array (BGA) package suitable for automated assembly
by standard surface mount equipment. The LTM8048 is
RoHS compliant.
L,
LT, LTC, LTM, Linear Technology, the Linear logo and µModule are registered trademarks of
Linear Technology Corporation. All other trademarks are the property of their respective owners.
n
n
n
n
n
n
Complete Switch Mode Power Supply
725VDC Isolation
Wide Input Voltage Range: 3.1V to 32V
V
OUT1
Output:
Up to 440mA (V
OUT1
= 2.5V, 24V
IN
)
2.5V to 13V Output Range
V
OUT2
Low Noise Linear Post Regulator:
Up to 300mA
1.2V to 12V Output Range
Current Mode Control
Programmable Soft-Start
User Configurable Undervoltage Lockout
(e1) RoHS Compliant Package
Low Profile (11.25mm
×
9mm
×
4.92mm) Surface
Mount BGA Package
applicaTions
n
n
n
Industrial Sensors
Industrial Switches
Ground Loop Mitigation
Typical applicaTion
725V DC Isolated Low Noise µModule Regulator
V
IN
3.1V TO 30V
LTM8048
ISOLATION BARRIER
2.2µF
4.7µF
V
IN
RUN
BIAS
6.19k
ADJ1
SS
GND
V
OUT1
V
OUT2
BYP
ADJ2
162k
V
OUT–
8048 TA01
Total Output Current vs V
IN
330
5.7V
V
OUT1
CURRENT (mA)
V
OUT2
5V
22µF
10µF
280
230
180
725VDC ISOLATION
130
80
0
5
10
20
15
INPUT VOLTAGE (V)
25
30
8048 TA01b
8048f
1
LTM8048
absoluTe MaxiMuM raTings
(Note 1)
pin conFiguraTion
TOP VIEW
A
B
C
D
E
F
G
H
1
2
3
4
BANK 5
V
IN
RUN
BANK 3
V
OUT2
BYP
BANK 2
V
OUT–
BANK 1
V
OUT1
BANK 4
GND
ADJ1
BIAS SS
5
6
7
V
IN
, RUN, BIAS ........................................................32V
ADJ1, SS .....................................................................5V
V
OUT1
Relative to V
OUT–
............................................16V
(V
IN
– GND) + (V
OUT1
– V
OUT–
) .................................36V
V
OUT2
Relative to V
OUT–
..........................................+20V
ADJ2 Relative to V
OUT–
.............................................+7V
BYP Relative to V
OUT–
............................................+0.6V
BIAS Above V
IN
........................................................ 0.1V
GND to V
OUT–
Isolation (Note 2) ........................ 725VDC
Maximum Internal Temperature (Note 3) .............. 125°C
Maximum Solder Temperature .............................. 250°C
ADJ2
BGA PACKAGE
45-LEAD (11.25mm
×
9mm
×
4.92mm)
T
JMAX
= 125°C,
θ
JA
= 23.2°C/W,
θ
JCbottom
= 5.8°C/W,
θ
JCtop
= 23.2°C/W,
θ
JB
= 6.7°C/W
WEIGHT = 1.1g,
θ
VALUES DETERMINED PER JEDEC 51-9, 51-12
orDer inForMaTion
LEAD FREE FINISH
LTM8048EY#PBF
LTM8048IY#PBF
LTM8048MPY#PBF
TRAY
LTM8048EY#PBF
LTM8048IY#PBF
LTM8048MPY#PBF
PART MARKING*
LTM8048Y
LTM8048Y
LTM8048Y
PACKAGE DESCRIPTION
45-Lead (11.25mm
×
9mm
×
4.92mm) BGA
45-Lead (11.25mm
×
9mm
×
4.92mm) BGA
45-Lead (11.25mm
×
9mm
×
4.92mm) BGA
TEMPERATURE RANGE (Note 3)
–40°C to 125°C
–40°C to 125°C
–55°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/
8048f
2
LTM8048
elecTrical characTerisTics
PARAMETER
Minimum Input DC Voltage
V
OUT1
DC Voltage
V
IN
Quiescent Current
V
OUT1
Line Regulation
V
OUT1
Load Regulation
V
OUT1
Ripple (RMS)
Input Short Circuit Current
RUN Pin Input Threshold
RUN Pin Current
SS Threshold
SS Sourcing Current
BIAS Current
Minimum BIAS Voltage (Note 4)
LDO (V
OUT2
) Minimum Input DC Voltage
V
OUT2
Voltage Range
ADJ2 Pin Voltage
SS = 0V
V
IN
= 12V, BIAS = 5V, I
LOAD1
= 100mA
I
LOAD1
= 100mA
(Note 5)
V
OUT1
= 16V, R
ADJ2
Open, No Load (Note 5)
V
OUT1
= 16V, R
ADJ2
= 41.2k, No Load (Note 5)
V
OUT1
= 2V, I
OUT2
= 1mA (Note 5)
V
OUT1
= 2V, I
OUT2
= 1mA, E- and I-Grades (Note 5)
V
OUT1
= 2V, I
OUT2
= 1mA, MP-Grade (Note 5)
2V < V
OUT1
< 16V, I
OUT2
= 1mA (Note 5)
V
OUT1
= 5V, 10mA < I
OUT2
= 300mA (Note 5)
I
OUT2
= 10mA (Note 5)
I
OUT2
= 100mA (Note 5)
I
OUT2
= 300mA (Note 5)
C
BYP
= 0.01µF I
OUT2
= 300mA, BW = 100Hz to 100kHz (Note 5)
,
20
l
l
The
l
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C, RUN = 12V (Note 3).
CONDITIONS
BIAS = V
IN
R
ADJ1
= 12.4k
R
ADJ1
= 7.15k
R
ADJ1
= 3.16k
V
RUN
= 0V
Not Switching
6V ≤ V
IN
≤ 31V, I
OUT
= 0.15A
0.05A ≤ I
OUT
≤ 0.2A
I
OUT
= 0.1A
V
OUT1
Shorted
RUN Pin Rising
V
RUN
= 1V
V
RUN
= 1.3V
1.18
l
MIN
TYP
2.5
5
12
850
1.7
1.5
20
30
1.24
2.5
0.1
0.7
–10
8
MAX
3.1
UNITS
V
V
V
V
1
µA
µA
%
%
mV
mA
1.30
V
µA
µA
V
µA
mA
3.1
1.8
1.22
15.8
1.19
1.15
1.22
1.25
1.29
5
10
0.25
0.34
0.43
range. The LTM8048MP is guaranteed to meet specifications over the
full –55°C to 125°C internal operating temperature range. Note that
the maximum internal temperature is determined by specific operating
conditions in conjunction with board layout, the rated package thermal
resistance and other environmental factors.
Note 4:
This is the BIAS pin voltage at which the internal circuitry is
powered through the BIAS pin and not the integrated regulator. See BIAS
Pin Considerations for details.
Note 5:
V
RUN
= 0V (Flyback not running), but the V
OUT2
post regulator is
powered by applying a voltage to V
OUT1
.
2.3
V
V
V
V
V
V
V
mV
mV
V
V
V
µV
RMS
V
OUT2
Line Regulation
V
OUT2
Load Regulation
LDO Dropout Voltage
1
2
V
OUT2
Ripple (RMS)
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 LTM8048 isolation is tested at 725VDC for one second in each
polarity.
Note 3:
The LTM8048E is guaranteed to meet performance specifications
from 0°C to 125°C. Specifications over the –40°C to 125°C internal
temperature range are assured by design, characterization and correlation
with statistical process controls. LTM8048I is guaranteed to meet
specifications over the full –40°C to 125°C internal operating temperature
8048f
3
LTM8048
as in Table 1 (T
A
= 25°C).
Typical perForMance characTerisTics
Efficiency vs Load
90
V
OUT1
= 2.5V
BIAS = 5V
90
Unless otherwise noted, operating conditions are
Efficiency vs Load
V
OUT1
= 3.3V
BIAS = 5V
12V
IN
EFFICIENCY (%)
90
Efficiency vs Load
V
OUT1
= 5V
BIAS = 5V
12V
IN
80
EFFICIENCY (%)
EFFICIENCY (%)
12V
IN
80
80
24V
IN
70
70
24V
IN
60
70
24V
IN
60
60
50
0
100
300
200
400
V
OUT1
CURRENT (mA)
500
8048 G01
50
0
100
300
200
V
OUT1
CURRENT (mA)
400
8048 G02
50
0
50
100 150 200 250
V
OUT1
CURRENT (mA)
300
350
8048 G03
Efficiency vs Load
100
V
OUT1
= 8V
BIAS = 5V
100
Efficiency vs Load
V
OUT1
= 12V
BIAS = 5V
8.5
BIAS Current vs V
OUT1
Load
12V
IN
V
OUT1
= 2.5V
8.0 BIAS = 5V
7.5
BIAS CURRENT (mA)
12V
IN
7.0
6.5
6.0
5.5
5.0
4.5
90
EFFICIENCY (%)
EFFICIENCY (%)
12V
IN
80
90
24V
IN
24V
IN
80
24V
IN
70
70
60
0
50
100 150 200 250
V
OUT1
CURRENT (mA)
300
350
60
0
50
8048 G04
150
200
100
V
OUT1
CURRENT (mA)
250
8048 G05
4.0
0
100
200
300
400
V
OUT1
CURRENT (mA)
500
8048 G06
8048f
4
LTM8048
Typical perForMance characTerisTics
as in Table 1 (T
A
= 25°C).
8.5
Unless otherwise noted, operating conditions are
BIAS Current vs V
OUT1
Load
12V
IN
V
OUT1
= 3.3V
BIAS = 5V
8.0
7.5
BIAS CURRENT (mA)
10
9
BIAS CURRENT (mA)
8
7
6
5
4
BIAS Current vs V
OUT1
Load
V
OUT1
= 5V
BIAS = 5V
12V
IN
BIAS CURRENT (mA)
12
BIAS Current vs V
OUT1
Load
12V
IN
V
OUT1
= 8V
BIAS = 5V
11
10
9
8
7
6
5
7.0
6.5
6.0
5.5
5.0
4.5
4.0
0
24V
IN
24V
IN
24V
IN
100
300
200
V
OUT1
CURRENT (mA)
400
8048 G07
0
50
100 150 200 250
V
OUT1
CURRENT (mA)
300
350
4
0
50
8048 G08
100 150 200 250
V
OUT1
CURRENT (mA)
300
350
8048 G09
13
BIAS Current vs V
OUT1
Load
12V
IN
MAXIMUM V
OUT1
LOAD (mA)
V
OUT1
= 12V
12 BIAS = 5V
11
BIAS CURRENT (mA)
10
9
8
7
6
5
4
0
50
500
Maximum Load vs V
IN
BIAS = V
IN
IF V
IN
≤ 5V
450 BIAS = 5V IF V
IN
> 5V
400
350
300
250
200
150
2.5V
OUT1
3.3V
OUT1
5V
OUT1
0
5
10
15
V
IN
(V)
20
25
30
8048 G11
350
300
MAXIMUM V
OUT1
LOAD (mA)
250
200
150
100
50
0
Maximum Load vs V
IN
BIAS = V
IN
IF V
IN
≤ 5V
BIAS = 5V IF V
IN
> 5V
24V
IN
100
150
200
V
OUT1
CURRENT (mA)
250
8048 G10
100
8V
OUT1
12V
OUT1
0
5
10
15
V
IN
(V)
20
25
8048 12
8048f
5
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参数对比
与LTM8048MPY#PBF.相近的元器件有：LTM8048EY#PBF.、LTM8048IY#PBF.。描述及对比如下：
型号 LTM8048MPY#PBF. LTM8048EY#PBF. LTM8048IY#PBF.
描述 DC/DC CONVERTER ISOLATED FB UMODULE BG DC/DC CONVERTER ISOLATED FB UMODULE BG DC/DC CONVERTER ISOLATED FB UMODULE BG
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器件捷径:
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