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PDF LTM8058 Data sheet ( Hoja de datos )
| Número de pieza | LTM8058 | |
| Descripción | uModule DC/DC Converter | |
| Fabricantes | Linear Technology | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de LTM8058 (archivo pdf) en la parte inferior de esta página. Total 20 Páginas | ||
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FEATURES
n 2kV AC Isolated µModule Converter
(Tested to 3kVDC)
n UL60950 Recognized File E464570
n Wide Input Voltage Range: 3.1V to 31V
n VOUT1 Output:
Up to 440mA (VIN = 24V, VOUT1 = 2.5V)
2.5V to 13V Output Range
n VOUT2 Low Noise Linear Post Regulator:
Up to 300mA
1.2V to 12V Output Range
n Current Mode Control
n Programmable Soft-Start
n User Configurable Undervoltage Lockout
n Low Profile (9mm × 11.25mm × 4.92mm)
BGA Package
APPLICATIONS
n Industrial Sensors
n Industrial Switches
n Ground Loop Mitigation
LTM8058
3.1VIN to 31VIN Isolated
µModule DC/DC Converter
with LDO Post Regulator
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
Linear Technology Corporation. All other trademarks are the property of their respective owners.
TYPICAL APPLICATION
2kV AC Isolated Low Noise µModule Regulator
VIN
4.3V TO 29V
VIN
2.2µF
RUN
GND
4.7µF
6.19k
BIAS
SS
ADJ1
•
•
2kV AC ISOLATION
LOW
NOISE
LDO
VOUT1
VOUT2
ADJ2
BYP
VOUT–
162k
VOUT1
5.7V
22µF
VOUT2
5V
10µF
LTM8058
8058 TA01a
For more information www.linear.com/LTM8058
Total Output Current vs VIN
330
280
230
180
130
80
0
5 10 15 20 25 30
INPUT VOLTAGE (V)
8058 TA01b
8058fa
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1 page  
LTM8058
T YPICAL PERFORMANCE CHARACTERISTICS Unless otherwise noted, operating conditions are
as in Table 1 (TA = 25°C).
Input Current vs Output Current
200
180
VOUT1 = 12V
BIAS = 5V
160
140
120
12VIN
100 24VIN
80
60
40
20
0
0 50 100 150 200
OUTPUT CURRENT (mA)
8058 G10
Bias Current vs Output Current
12 VOUT1 = 5V
BIAS = 5V
10
12VIN
8
24VIN
6
4
2
0
0 100 200 300 400
OUTPUT CURRENT (mA)
8058 G13
Maximum Output Current vs VIN
500
BIAS = 5V FOR VIN ≥ 5V
BIAS = VIN FOR VIN < 5V
400
300
200
100
0
0
VOUT1 = 2.5V
VOUT1 = 3.3V
VOUT1 = 5V
5 10 15 20 25 30
VIN (V)
8058 G16
Bias Current vs Output Current
9 VOUT1 = 2.5V
8 BIAS = 5V
7 12VIN
6
24VIN
5
4
3
2
1
0
1 100 200 300 400
OUTPUT CURRENT (mA)
8058 G11
Bias Current vs Output Current
12 VOUT1 = 8V
BIAS = 5V
10
12VIN
24VIN
8
6
4
2
0
0 50 100 150 200 250 300
OUTPUT CURRENT (mA)
8058 G14
Maximum Output Current vs VIN
400 BIAS = 5V FOR VIN ≥ 5V
BIAS = VIN FOR VIN < 5V
300
200
100
VOUT1 = 8V
VOUT1 = 12V
0
0 5 10 15 20 25 30
VIN (V)
8058 G17
Bias Current vs Output Current
10
9
VOUT1 = 3.3V
BIAS = 5V
8 12VIN
7 24VIN
6
5
4
3
2
1
0
0 100 200 300 400
OUTPUT CURRENT (mA)
8058 G12
Bias Current vs Output Current
14 VOUT1 = 12V
12 BIAS = 5V
10 12VIN
24VIN
8
6
4
2
0
0 50 100 150 200
OUTPUT CURRENT (mA)
8058 G15
Minimum Required Load
vs Input Voltage
45 BIAS = 5V FOR VIN ≥ 5V
40 BIAS = VIN FOR VIN < 5V
35
30
25
20
15
10 VOUT1 = 2.5V
5 VOUT1 = 3.3V
0 VOUT1 = 5V
0 10 20 30 40
INPUT VOLTAGE (V)
8058 G18
For more information www.linear.com/LTM8058
8058fa
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5 Page 
LTM8058
APPLICATIONS INFORMATION
LTM8058 Table 1b. Recommended Component Values and Configuration for Specific VOUT2 Voltages (TA = 25°C)
VIN VOUT1 VOUT2
VBIAS
CIN
COUT1
COUT2
3.1V to 31V 2.3V 1.2V 3.1V to 15V or Open 2.2µF, 50V, 1206 100µF, 6.3V, 1210 10µF, 6.3V, 1206
RADJ1
133k
3.1V to 31V 2.3V 1.5V 3.1V to 15V or Open 2.2µF, 50V, 1206 100µF, 6.3V, 1210 10µF, 6.3V, 1206
133k
3.1V to 31V 2.3V 1.8V 3.1V to 15V or Open 2.2µF, 50V, 1206 100µF, 6.3V, 1210 10µF, 6.3V, 1206
13.3k
3.1V to 31V 3.08V 2.5V 3.1V to 15V or Open 2.2µF, 50V, 1206 100µF, 6.3V, 1210 10µF, 6.3V, 1206
10.5k
3.1V to 31V 3.92V 3.3V 3.1V to 15V or Open 2.2µF, 50V, 1206 47µF, 6.3V, 1210 10µF, 6.3V, 1206
8.66k
3.1V to 29V 5.7V
5V 3.1V to 15V or Open 2.2µF, 50V, 1206 22µF, 16V, 1210 10µF, 6.3V, 1206
6.19k
3.1V to 26V 8.85V 8V 3.1V to 15V or Open 2.2µF, 50V, 1206 22µF, 10V, 1206 10µF, 10V, 1206
4.12k
3.1V to 21V 13V 12V 3.1V to 15V or Open 2.2µF, 25V, 0805 10µF, 16V, 1210 22µF, 16V, 1206 2.94k/22pF*
9V to 15V
9V to 15V
9V to 15V
9V to 15V
9V to 15V
9V to 15V
9V to 15V
9V to 15V
18V to 31V
2.3V
2.3V
2.3V
3.08V
3.92V
5.7V
8.85V
13V
2.3V
1.2V
VIN
2.2µF, 50V, 1206 100µF, 6.3V, 1210 10µF, 6.3V, 1206
133k
1.5V
VIN
2.2µF, 50V, 1206 100µF, 6.3V, 1210 10µF, 6.3V, 1206
133k
1.8V
VIN
2.2µF, 50V, 1206 100µF, 6.3V, 1210 10µF, 6.3V, 1206
13.3k
2.5V
VIN
2.2µF, 50V, 1206 100µF, 6.3V, 1210 10µF, 6.3V, 1206
10.5k
3.3V
VIN
2.2µF, 50V, 1206 47µF, 6.3V, 1210 10µF, 6.3V, 1206
8.66k
5V
VIN
2.2µF, 50V, 1206 22µF, 16V, 1210 10µF, 6.3V, 1206
6.19k
8V
VIN
2.2µF, 50V, 1206 22µF, 10V, 1206 10µF, 10V, 1206
4.12k
12V VIN 2.2µF, 25V, 0805 10µF, 16V, 1210 22µF, 16V, 1206 2.94k/22pF*
1.2V 3.1V to 15V or Open 2.2µF, 50V, 1206 100µF, 6.3V, 1210 10µF, 6.3V, 1206
133k
18V to 31V 2.3V 1.5V 3.1V to 15V or Open 2.2µF, 50V, 1206 100µF, 6.3V, 1210 10µF, 6.3V, 1206
133k
18V to 31V
2.3V 1.8V 3.1V to 15V or Open 2.2µF, 50V, 1206 100µF, 6.3V, 1210 10µF, 6.3V, 1206
13.3k
18V to 31V 3.08V 2.5V 3.1V to 15V or Open 2.2µF, 50V, 1206 100µF, 6.3V, 1210 10µF, 6.3V, 1206
10.5k
18V to 31V 3.92V 3.3V 3.1V to 15V or Open 2.2µF, 50V, 1206 47µF, 6.3V, 1210 10µF, 6.3V, 1206
8.66k
18V to 29V 5.7V
5V 3.1V to 15V or Open 2.2µF, 50V, 1206 22µF, 16V, 1210 10µF, 6.3V, 1206
6.19k
18V to 26V 8.85V 8V 3.1V to 15V or Open 2.2µF, 50V, 1206 22µF, 10V, 1206 10µF, 10V, 1206
4.12k
Note: Do not allow BIAS to exceed VIN, a bulk input capacitor is required. If BIAS is open, the minimum VIN is 4.3V.
*Connect 2.94k in parallel with 22pF from ADJ1 to GND.
RADJ2
Open
2.32M
1.07M
487k
294k
162k
88.7k
56.2k
Open
2.32M
1.07M
487k
294k
162k
88.7k
56.2k
Open
2.32M
1.07M
487k
294k
162k
88.7k
BIAS Pin Considerations
regulator. This has the added advantage of keeping the
The BIAS pin is the output of an internal linear regulator
that powers the LTM8058’s internal circuitry. It is set to 3V
physical size of the BIAS capacitor small. Do not allow
BIAS to rise above VIN.
and must be decoupled with a low ESR capacitor of at least
4.7μF. The LTM8058 will run properly without applying
a voltage to this pin, but will operate more efficiently and
dissipate less power if a voltage between 3.1V and VIN is
applied. At low VIN, the LTM8058 will be able to deliver
more output current if BIAS is 3.1V or greater. Up to 31V
may be applied to this pin, but a high BIAS voltage will
cause excessive power dissipation in the internal circuitry.
For applications with an input voltage less than 15V, the
BIAS pin is typically connected directly to the VIN pin. For
input voltages greater than 15V, it is preferred to leave the
BIAS pin separate from the VIN pin, either powered from
a separate voltage source or left running from the internal
Soft-Start
For many applications, it is necessary to minimize the
inrush current at start-up. The built-in soft-start circuit
significantly reduces the start-up current spike and output
voltage overshoot by applying a capacitor from SS to GND.
When the LTM8058 is enabled, whether from VIN reaching
a sufficiently high voltage or RUN being pulled high, the
LTM8058 will source approximately 10µA out of the SS
pin. As this current gradually charges the capacitor from
SS to GND, the LTM8058 will correspondingly increase
the power delivered to the output, allowing for a graceful
turn-on ramp.
For more information www.linear.com/LTM8058
8058fa
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11 Page | ||
| Páginas | Total 20 Páginas | |
| PDF Descargar | [ Datasheet LTM8058.PDF ] | |
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