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PDF LTM8056 Data sheet ( Hoja de datos )
| Número de pieza | LTM8056 | |
| Descripción | Buck-Boost uModule Regulator | |
| Fabricantes | Linear Technology | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de LTM8056 (archivo pdf) en la parte inferior de esta página. Total 26 Páginas | ||
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LTM8056
58VIN, 48VOUT Buck-Boost
µModule Regulator
Features
n Complete Buck-Boost Switch Mode Power Supply
n Wide Input Voltage Range: 5V to 58V
n 12V/1.7A Output from 6VIN
n 12V/3.4A Output from 12VIN
n 12V/5.4A Output from 24VIN
n Up to 96% Efficient
n Adjustable Input and Output Average Current Limits
n Input and Output Current Monitors
n Parallelable for Increased Output Current
n Wide Output Voltage Range: 1.2V to 48V
n Selectable Switching Frequency: 100kHz to 800kHz
n Synchronization from 200kHz to 700kHz
n 15mm × 15mm × 4.92mm BGA Package
Applications
n High Power Battery-Operated Devices
n Industrial Control
n Solar Powered Voltage Regulator
n Solar Powered Battery Charging
Description
The LTM®8056 is a 58VIN, buck-boost µModule®
(micromodule) regulator. Included in the package are the
switching controller, power switches, inductor and support
components. A resistor to set the switching frequency, a
resistor divider to set the output voltage, and input and
output capacitors are all that are needed to complete the
design. Other features such as input and output average
current regulation may be implemented with just a few
components. The LTM8056 operates over an input volt-
age range of 5V to 58V, and can regulate output voltages
between 1.2V and 48V. The SYNC input and CLKOUT
output allow easy synchronization.
The LTM8056 is housed in a compact overmolded ball
grid array (BGA) package suitable for automated assembly
by standard surface mount equipment. The LTM8056 is
available with SnPB or RoHS compliant terminal finish.
L, LT, LTC, LTM, Linear Technology, the Linear logo, µModule and Burst Mode are registered
trademarks of Linear Technology Corporation. All other trademarks are the property of their
respective owners.
Typical Application
VIN
7V TO 58V
24VOUT from 7VIN to 58VIN Buck-Boost Regulator
2.2µF
100V
×3
43.2k
525kHz
VIN
SVIN
IIN
LTM8056
RUN
CTL
SS
SYNC
COMP
RT LL
MODE
GND
VOUT
IOUT
CLKOUT
IINMON
IOUTMON
FB
VOUT
24V
100k
33µF
35V
5.23k
22µF
25V
8056 TA01a
Max Output Current and Efficiency vs VIN
95 7
6
94
5
93 4
92 3
2
91
EFFICIENCY
1
MAX OUTPUT CURRENT
90 0
0 10 20 30 40 50
VIN (V)
8056 TA01b
For more information www.linear.com/LTM8056
8056f
1
1 page  
LTM8056
Typical Performance Characteristics TA = 25°C, unless otherwise noted.
Input Current vs Output Current
(5VOUT)
4
5VIN
12VIN
22VIN
3
2
1
0
0 246
OUTPUT CURRENT (A)
8056 G10
Input Current vs Output Current
(8VOUT)
5
5VIN
12VIN
4 24VIN
3
2
1
0
0 246
OUTPUT CURRENT (A)
8056 G11
Input Current vs Output Current
(12VOUT)
4
3
2
1 5VIN
12VIN
24VIN
0 36VIN
0 246
OUTPUT CURRENT (A)
8056 G12
Input Current vs Output Current
(18VOUT)
5
Input Current vs Output Current
(24VOUT)
5
Input Current vs Output Current
(36VOUT)
5
44
33
4
3
2
1
6VIN
12VIN
24VIN
0 48VIN
02 46
OUTPUT CURRENT (A)
8056 G13
Input Current vs Output Current
(48VOUT)
4
3
2
1 13VIN
24VIN
36VIN
48VIN
0
0 0.5 1.0 1.5 2.0 2.5 3.0 3.5
OUTPUT CURRENT (A)
8056 G16
2
7VIN
1
12VIN
24VIN
36VIN
0 48VIN
0246
OUTPUT CURRENT (A)
8056 G14
Maximum Output Current vs VIN
6
5
4
3
3.3VOUT
5VOUT
8VOUT
2
0 10 20 30
VIN (V)
8056 G17
2
9VIN
1
12VIN
24VIN
36VIN
48VIN
0
024 6
OUTPUT CURRENT (A)
8056 G15
Maximum Output Current vs VIN
6
5
4
3
2
1
12VOUT
18VOUT
24VOUT
0
0 10 20 30 40 50
VIN (V)
8056 G18
For more information www.linear.com/LTM8056
8056f
5
5 Page 
LTM8056
Applications Information
For most applications, the design process is straight for-
ward, summarized as follows:
1. Look at Table 1 and find the row that has the desired
input range and output voltage.
2. Apply the recommended CIN, COUT, RFB1/RFB2 and RT
values.
3. Apply the output sense resistor to set the output current
limit. The output current is limited to 58mV/RSENSE,
where RSENSE is the value of the output current sense
resistor in ohms.
While these component combinations have been tested for
proper operation, it is incumbent upon the user to verify
proper operation over the intended system’s line, load and
environmental conditions. Bear in mind that the maximum
output current is limited by junction temperature, the rela-
tionship between the input and output voltage magnitude
and other factors. Please refer to the graphs in the Typical
Performance Characteristics section for guidance.
The maximum frequency (and attendant RT value) at
which the LTM8056 should be allowed to switch is given
in Table 1 in the fMAX column, while the recommended
frequency (and RT value) for optimal efficiency over the
given input condition is given in the fOPTIMAL column.
There are additional conditions that must be satisfied if
the synchronization function is used. Please refer to the
Synchronization section for details.
Note that Table 1 calls out both ceramic and electrolytic
output capacitors. Both of the capacitors called out in
the table must be applied to the output. The electrolytic
capacitors in Table 1 are described by voltage rating,
value and ESR. The voltage rating of the capacitor may
be increased if the application requires a higher voltage
stress derating. The LTM8056 can tolerate variation
in the ESR; other capacitors with different ESR may
be used, but the user must verify proper operation
over line, load and environmental conditions. Table 2
gives the description and part numbers of electrolytic
capacitors used in the LTM8056 development testing and
design validation.
Table 1. Recommended Component Values and Configuration (TA = 25°C)
VIN RANGE VOUT
CIN
COUT
RFB1/RFB2
5V to 24V 3.3V 2 × 4.7µF, 50V, 0805 22µF, 6.3V, X5R, 0805
100k/56.2k
100µF, 6V, 75mΩ, Electrolytic
fOPTIMAL (kHz)
650
RT(OPTIMAL)
31.6k
fMAX (kHz)
800
RT(MAX)
24.9k
5V to 22V
5V 2 × 4.7µF, 50V, 0805 22µF, 6.3V, X5R, 0805
100k/31.6k
100µF, 6V, 75mΩ, Electrolytic
450
53.6k
800 24.9k
5V to 28V
8V 2 × 4.7µF, 50V, 0805 22µF, 10V, X7R, 1206
100k/17.4k
100µF, 16V, 100mΩ, Electrolytic
500
45.3k
800 24.9k
5V to 41V
12V 2 × 4.7µF, 50V, 0805 22µF, 25V, X5R, 0805
100k/11k
68µF, 16V, 200mΩ, Electrolytic
650
31.6k
800 24.9k
5.8V to 58V 18V 3 × 2.2µF, 100V, 1206 22µF, 25V, X5R, 0805
100k/6.98k
47µF, 25V, 900mΩ, Electrolytic
650
31.6k
800 24.9k
7V to 58V
24V 3 × 2.2µF, 100V, 1206 22µF, 25V, X5R, 0805
100k/5.23k
33µF, 35V 300mΩ, Electrolytic
525
43.2k
800 24.9k
8.5V to 58V 36V 3 × 2.2µF, 100V, 1206 10µF, 50V, X5R, 1206
100k/3.40k
10µF, 50V 120mΩ, Electrolytic
500
45.3k
800 24.9k
12.5V to 58V 48V 3 × 2.2µF, 100V, 1206 10µF, 50V, X5R, 1206
100k/2.55k
10µF, 63V 120mΩ, Electrolytic
475
49.9k
800 24.9k
Notes: An input bulk capacitor is required. The output capacitance uses a combination of a ceramic and electrolytic in parallel. Other combinations of
resistor values for the RFB network are acceptable.
For more information www.linear.com/LTM8056
8056f
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11 Page | ||
| Páginas | Total 26 Páginas | |
| PDF Descargar | [ Datasheet LTM8056.PDF ] | |
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