LTM8058
3.1V
IN
to 31V
IN
Isolated
µModule DC/DC Converter
with LDO Post Regulator
FEATURES
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DESCRIPTION
The
LTM
®
8058
is a 2kV AC isolated flyback µModule
®
(micromodule) DC/DC converter with LDO post regulator.
Included in the package are the switching controller, power
switches, transformer, LDO, and all support components.
Operating over an input voltage range of 3.1V to 31V, the
LTM8058 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 adjustable from 1.2V to 12V as
set by a single resistor. Only output and input capacitors
are needed to finish the design. Other components may
be used to control the soft-start control and biasing.
The LTM8058 is packaged in a thermally enhanced, com-
pact (9mm
×
11.25mm
×
4.92mm) overmolded ball grid
array (BGA) package suitable for automated assembly
by standard surface mount equipment. The LTM8058 is
available with SnPb or RoHS compliant terminal finish.
L,
LT, LTC, LTM, Linear Technology, the Linear logo and µModule are registered trademarks of
Analog Devices, Inc. All other trademarks are the property of their respective owners.
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2kV AC Isolated µModule Converter
(Tested to 3kVDC)
UL60950 Recognized File E464570
Wide Input Voltage Range: 3.1V to 31V
V
OUT1
Output:
Up to 440mA (V
IN
= 24V
,
V
OUT1
= 2.5V)
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
Low Profile (9mm
×
11.25mm
×
4.92mm)
BGA Package
APPLICATIONS
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Industrial Sensors
Industrial Switches
Ground Loop Mitigation
TYPICAL APPLICATION
2kV AC Isolated Low Noise µModule Regulator
330
V
IN
4.3V TO 29V
V
IN
V
OUT1
V
OUT1
5.7V
22µF
162k
Total Output Current vs V
IN
•
RUN
2.2µF
GND
BIAS
4.7µF
6.19k
SS
ADJ1
2kV AC ISOLATION
V
OUT2
•
ADJ2
BYP
V
OUT–
V
OUT1
CURRENT (mA)
LOW
NOISE
LDO
V
OUT2
5V
10µF
280
230
180
130
LTM8058
8058 TA01a
80
0
5
10
20
15
INPUT VOLTAGE (V)
25
30
8058 TA01b
8058fb
For more information
www.linear.com/LTM8058
1
LTM8058
ABSOLUTE MAXIMUM RATINGS
(Note 1)
PIN CONFIGURATION
TOP VIEW
A
B
C
D
E
F
G
H
1
2
BANK 5
V
IN
RUN
BANK 4
GND
ADJ1
BIAS SS
ADJ2
BANK 3 BYP
V
OUT2
BANK 2
V
OUT–
BANK 1
V
OUT1
V
IN
, RUN ..................................................................32V
BIAS ..........................................................................V
IN
ADJ1, SS .....................................................................5V
V
OUT1
Relative to V
OUT–
.......................................... +16V
V
IN
+ V
OUT1
(Note 2) .................................................36V
V
OUT2
Relative to V
OUT–
..........................................+20V
ADJ2 Relative to V
OUT–
.............................................+7V
GND to V
OUT–
Isolation (Note 3) ......................... 2kV AC
Maximum Internal Temperature (Note 4) .............. 125°C
Maximum Peak Body Reflow Temperature ........... 245°C
Storage Temperature.............................. –55°C to 125°C
3
4
5
6
7
BGA PACKAGE
38-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
PART NUMBER
LTM8058EY#PBF
LTM8058IY#PBF
LTM8058IY
LTM8058MPY#PBF
LTM8058MPY
PAD OR BALL FINISH
SAC305 (RoHS)
SAC305 (RoHS)
SnPb (63/37)
SAC305 (RoHS)
SnPb (63/37)
http://www.linear.com/product/LTM8058#orderinfo
PART MARKING*
DEVICE
LTM8058Y
LTM8058Y
LTM8058Y
LTM8058Y
LTM8058Y
FINISH CODE
e1
e1
e0
e1
e0
PACKAGE
TYPE
BGA
BGA
BGA
BGA
BGA
MSL
RATING
3
3
3
3
3
TEMPERATURE RANGE
(Note 4)
–40°C to 125°C
–40°C to 125°C
–40°C to 125°C
–55°C to 125°C
–55°C to 125°C
Consult Marketing for parts specified with wider operating temperature
ranges. *Device temperature grade is indicated by a label on the shipping
container. Pad or ball finish code is per IPC/JEDEC J-STD-609.
• Terminal Finish Part Marking:
www.linear.com/leadfree
• Recommended LGA and BGA PCB Assembly and Manufacturing
Procedures:
www.linear.com/umodule/pcbassembly
• LGA and BGA Package and Tray Drawings:
www.linear.com/packaging
8058fb
2
For more information
www.linear.com/LTM8058
LTM8058
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 5)
LDO (V
OUT2
) Minimum Input DC Voltage
V
OUT2
Voltage Range
ADJ2 Pin Voltage
V
OUT2
Line Regulation
V
OUT2
Load Regulation
LDO Dropout Voltage
SS = 0V
V
IN
= 12V, BIAS = 5V, I
LOAD1
= 100mA
I
LOAD1
= 100mA
(Note 6)
V
OUT1
= 16V, R
ADJ2
Open, No Load (Note 6)
V
OUT1
= 16V, R
ADJ2
= 41.2k, No Load (Note 6)
V
OUT1
= 2V, I
OUT2
= 1mA (Note 6)
V
OUT1
= 2V, I
OUT2
= 1mA (Note 6)
2V < V
OUT1
< 16V, I
OUT2
= 1mA (Note 6)
V
OUT1
= 5V, 10mA ≤ I
OUT2
≤ 300mA (Note 6)
I
OUT2
= 10mA (Note 6)
I
OUT2
= 100mA (Note 6)
I
OUT2
= 300mA (Note 6)
C
BYP
= 0.01µF, I
OUT2
= 300mA, BW = 100Hz to 100kHz (Note 6)
20
l
The
l
denotes the specifications which apply over the full internal
operating temperature range, otherwise specifications are at T
A
= 25°C, RUN = 12V (Note 4).
CONDITIONS
BIAS = V
IN
, RUN = 2V
BIAS Open, RUN = 2V
R
ADJ1
= 12.4k
R
ADJ1
= 6.98k
R
ADJ1
= 3.16k
V
RUN
= 0V
Not Switching
6V ≤ V
IN
≤ 31V, I
OUT
= 0.15A, RUN = 2V
0.05A ≤ I
OUT
≤ 0.2A, RUN = 2V
I
OUT
= 0.1A, 1MHz BW
V
OUT1
Shorted
RUN Pin Rising
V
RUN
= 1V
V
RUN
= 1.3V
1.18
l
l
l
MIN
TYP
MAX
3.1
4.3
UNITS
V
V
V
V
V
µA
µA
%
%
mV
mA
4.75
2.5
5
12
850
1.7
1.5
20
30
1.24
2.5
0.1
0.7
–10
8
5.25
1
1.30
V
µA
µA
V
µA
mA
3.1
1.8
1.22
15.8
1.19
1.22
1
2
1.25
5
10
0.25
0.34
0.43
specifications over the full –40°C to 125°C internal operating temperature
range. The LTM8058MP 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 5:
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 6:
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
mV
mV
V
V
V
µV
RMS
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:
V
IN
+ V
OUT1
is defined as the sum of:
(V
IN
– GND) + (V
OUT1
– V
OUT–
)
Note 3:
The LTM8058 isolation is tested at 3kV DC for one second.
Note 4:
The LTM8058E 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. LTM8058I is guaranteed to meet
8058fb
For more information
www.linear.com/LTM8058
3
LTM8058
as in Table 1 (T
A
= 25°C).
TYPICAL PERFORMANCE CHARACTERISTICS
Efficiency vs Output Current
75
70
24V
IN
EFFICIENCY (%)
EFFICIENCY (%)
65
60
V
OUT1
= 2.5V
BIAS = 5V
12V
IN
80
75
70
65
60
55
50
Unless otherwise noted, operating conditions are
Efficiency vs Output Current
V
OUT1
= 3.3V
BIAS = 5V
12V
IN
24V
IN
EFFICIENCY (%)
80
75
70
65
60
55
50
Efficiency vs Output Current
V
OUT1
= 5V
BIAS = 5V
12V
IN
24V
IN
55
50
0
200
100
300
OUTPUT CURRENT (mA)
400
8058 G01
0
100
200
300
OUTPUT CURRENT (mA)
400
8058 G02
0
100
200
300
OUTPUT CURRENT (mA)
400
8058 G03
Efficiency vs Output Current
85
80
75
EFFICIENCY (%)
70
65
60
55
50
0
50
200
150
250
100
OUTPUT CURRENT (mA)
300
8058 G04
Efficiency vs Output Current
85
80
75
EFFICIENCY (%)
24V
IN
70
65
60
55
50
0
50
150
OUTPUT CURRENT (mA)
100
200
8058 G05
Input Current vs Output Current
V
OUT1
= 2.5V
BIAS = 5V
80
INPUT CURRENT (mA)
90
V
OUT1
= 8V
BIAS = 5V
12V
IN
24V
IN
V
OUT1
= 12V
BIAS = 5V
12V
IN
70
60
50
40
30
20
10
0
1
12V
IN
24V
IN
200
100
300
OUTPUT CURRENT (mA)
400
8058 G06
Input Current vs Output Current
100
90
80
INPUT CURRENT (mA)
70
60
50
40
30
20
10
0
0
200
100
300
OUTPUT CURRENT (mA)
400
8058 G07
Input Current vs Output Current
140
120
INPUT CURRENT (mA)
V
OUT1
= 5V
BIAS = 5V
INPUT CURRENT (mA)
180
160
140
100
80
60
40
20
0
0
100
300
OUTPUT CURRENT (mA)
200
400
8058 G08
Input Current vs Output Current
V
OUT1
= 8V
BIAS = 5V
12V
IN
24V
IN
V
OUT1
= 3.3V
BIAS = 5V
12V
IN
24V
IN
12V
IN
24V
IN
120
100
80
60
40
20
0
0
50
100
150
200
250
OUTPUT CURRENT (mA)
300
8058 G09
8058fb
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For more information
www.linear.com/LTM8058
LTM8058
TYPICAL PERFORMANCE CHARACTERISTICS
as in Table 1 (T
A
= 25°C).
Input Current vs Output Current
200
180
160
INPUT CURRENT (mA)
BIAS CURRENT (mA)
140
120
100
80
60
40
20
0
0
100
50
150
OUTPUT CURRENT (mA)
200
8058 G10
Unless otherwise noted, operating conditions are
Bias Current vs Output Current
V
OUT1
= 2.5V
8 BIAS = 5V
7
9
10
9
12V
IN
BIAS CURRENT (mA)
24V
IN
8
7
6
5
4
3
2
1
1
200
100
300
OUTPUT CURRENT (mA)
400
8058 G11
Bias Current vs Output Current
V
OUT1
= 3.3V
BIAS = 5V
12V
IN
24V
IN
V
OUT1
= 12V
BIAS = 5V
12V
IN
24V
IN
6
5
4
3
2
1
0
0
0
200
100
300
OUTPUT CURRENT (mA)
400
8058 G12
Bias Current vs Output Current
12
10
BIAS CURRENT (mA)
BIAS CURRENT (mA)
12V
IN
8
6
4
2
0
24V
IN
V
OUT1
= 5V
BIAS = 5V
12
10
8
6
4
2
0
Bias Current vs Output Current
V
OUT1
= 8V
BIAS = 5V
14
12V
IN
BIAS CURRENT (mA)
24V
IN
12
10
8
6
4
2
0
50
100
150
200
250
OUTPUT CURRENT (mA)
300
0
Bias Current vs Output Current
V
OUT1
= 12V
BIAS = 5V
12V
IN
24V
IN
0
100
300
OUTPUT CURRENT (mA)
200
400
8058 G13
0
50
100
150
OUTPUT CURRENT (mA)
200
8058 G15
8058 G14
500
MAXIMUM OUTPUT CURRENT (mA)
Maximum Output Current vs V
IN
MAXIMUM OUTPUT CURRENT (mA)
BIAS = 5V FOR V
IN
≥ 5V
BIAS = V
IN
FOR V
IN
< 5V
400
Maximum Output Current vs V
IN
MAXIMUM REQUIRED LOAD (mA)
BIAS = 5V FOR V
IN
≥ 5V
BIAS = V
IN
FOR V
IN
< 5V
45
40
35
30
25
20
15
10
5
30
8058 G17
Minimum Required Load
vs Input Voltage
BIAS = 5V FOR V
IN
≥ 5V
BIAS = V
IN
FOR V
IN
< 5V
400
300
300
200
200
100
V
OUT1
= 8V
V
OUT1
= 12V
0
5
10
15
V
IN
(V)
20
25
100
0
V
OUT1
= 2.5V
V
OUT1
= 3.3V
V
OUT1
= 5V
0
5
10
15
V
IN
(V)
20
25
30
8058 G16
0
0
V
OUT1
= 2.5V
V
OUT1
= 3.3V
V
OUT1
= 5V
0
10
20
INPUT VOLTAGE (V)
8058 G18
30
40
8058fb
For more information
www.linear.com/LTM8058
5
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