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PDF LTM8025 Data sheet ( Hoja de datos )
| Número de pieza | LTM8025 | |
| Descripción | 3A Step-Down uModule Converter | |
| Fabricantes | Linear Technology | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de LTM8025 (archivo pdf) en la parte inferior de esta página. Total 20 Páginas | ||
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LTM8025
36V, 3A Step-Down
µModule Converter
FEATURES
n Complete Step-Down Switch Mode Power Supply
n Wide Input Voltage Range: 3.6V to 36V
n Up to 3A Output Current
n Parallelable for Increased Output Current
n 0.8V to 24V Output Voltage
n Selectable Switching Frequency: 200kHz to 2.4MHz
n Current Mode Control
n (e4) RoHS Compliant Package with Gold Pad Finish
n Programmable Soft-Start
n Tiny, Low Profile (15mm × 9mm × 4.32mm) Surface
Mount LGA Package
APPLICATIONS
n Automotive Battery Regulation
n Power for Portable Products
n Distributed Supply Regulation
n Industrial Supplies
n Wall Transformer Regulation
DESCRIPTION
The LTM®8025 is a 36VIN, 3A step down μModule® con-
verter. Included in the package are the switching controller,
power switches, inductor and all support components.
Operating over an input voltage range of 3.6V to 36V, the
LTM8025 supports an output voltage range of 0.8V to 24V
and a switching frequency range of 200kHz to 2.4MHz,
each set by a single resistor. Only the bulk input and output
filter capacitors are needed to finish the design.
The low profile package (4.32mm) enables utilization of
unused space on the bottom of PC boards for high density
point of load regulation.
The LTM8025 is packaged in a thermally enhanced, compact
(15mm × 9mm) and low profile (4.32mm) over-molded
land grid array (LGA) package suitable for automated
assembly by standard surface mount equipment. The
LTM8025 is RoHS compliant.
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear
Technology Corporation. All other trademarks are the property of their respective owners.
TYPICAL APPLICATION
www.DataSheet4U.com
VIN*
22V TO 36V
4.7μF
47.5k
VIN
RUN/SS
VOUT
AUX
LTM8025 BIAS
SHARE
PGOOD
RT ADJ
SYNC GND
VOUT
12V AT 3A
22μF
34.8k
*RUNNING VOLTAGE RANGE. PLEASE REFER TO
APPLICATIONS INFORMATION SECTION FOR START-UP DETAILS 8025 TA01a
100
VIN = 24V
90
Efficiency
80
70
60
50
40
0
500 1000 1500 2000 2500 3000
OUTPUT CURRENT (mA)
8025 TA01b
8025f
1
1 page  
LTM8025
TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C, unless otherwise noted.
Bias Current vs Load Current
8VOUT
80 12VIN
70 24VIN
60
50
40
30
20
10
0
0
1000
2000
3000
LOAD CURRENT (mA)
8025 G10
Bias Current vs Load Current
12VOUT
70
60
50
40
24VIN
30
20
10
0
0
1000
2000
3000
LOAD CURRENT (mA)
8025 G11
Bias Current vs Load Current
18VOUT
120
100
80
24VIN
60
40
20
0
0
500
1000
1500
LOAD CURRENT (mA)
8025 G12
Input Current vs Load Current
2.5VOUT
2500
2000
5VIN
12VIN
24VIN
32VIN
1500
1000
500
www.DataS0 heet4U.com
0 1000
2000
LOAD CURRENT (mA)
3000
8025 G13
Input Current vs Load Current
3.3VOUT
2500
2000
5.5VIN
12VIN
24VIN
32VIN
1500
1000
500
0
0
1000
2000
3000
LOAD CURRENT (mA)
8025 G14
Input Current vs Load Current
5VOUT
1600
1400
12VIN
24VIN
32VIN
1200
1000
800
600
400
200
0
0
1000
2000
3000
LOAD CURRENT (mA)
8025 G15
Input Current vs Load Current
8VOUT
2500
2000
12VIN
24VIN
32VIN
1500
1000
500
0
0
1000
2000
3000
LOAD CURRENT (mA)
8025 G16
Input Current vs Load Current
12VOUT
3000
2500
16VIN
24VIN
32VIN
2000
1500
1000
500
0
0
1000
2000
3000
LOAD CURRENT (mA)
8025 G17
Input Current vs Load Current
18VOUT
3000
2500
24VIN
32VIN
2000
1500
1000
500
0
0
1000
2000
3000
LOAD CURRENT (mA)
8025 G18
8025f
5
5 Page 
LTM8025
APPLICATIONS INFORMATION
Table 1: Recommended Component Values and Configuration (TA = 25°C)
VIN VOUT
3.6V to 36V 0.8V
CIN
10μF, 50V, 1210
COUT
4× 100μF, 6.3V, 1210
RADJ
Open
BIAS
2.8V to 25V
fOPTIMAL
230kHz
RT(OPTIMAL)
182k
fMAX
250kHz
RT(MIN)
169k
3.6V to 36V 1.5V 10μF, 50V, 1210 4× 100μF, 6.3V, 1210 549k 2.8V to 25V 270kHz 154k 360kHz 113k
3.6V to 36V 1.8V 10μF, 50V, 1210 3× 100μF, 6.3V, 1210 383k 2.8V to 25V 285kHz 147k 420kHz 95.3k
4.1V to 36V 2.5V 4.7μF, 50V, 1206 2× 100μF, 6.3V, 1210 226k 2.8V to 25V 300kHz 137k 540kHz 71.5k
5.3V to 36V 3.3V 4.7μF, 50V, 1206 100μF, 6.3V, 1210
154k
AUX
345kHz 118k 675kHz 54.9k
7.5V to 36V 5V 4.7μF, 50V, 1206 100μF, 6.3V, 1206 93.1k
AUX
425kHz
93.1k
950kHz 36.5k
10.5V to 36V 8V 4.7μF, 50V, 1206
47μF, 16V, 1210
54.9k
AUX
550kHz
69.8k
1.45MHz 20.5k
16V to 36V 12V 2.2μF, 50V, 1206
22μF, 16V, 1210
34.8k
AUX
760kHz
47.5k
2.3MHz 9.09k
23V to 36V 18V 2.2μF, 50V, 1206
22μF, 25V, 1812
22.6k
AUX
800kHz
44.2k
2.4MHz 8.25k
31V to 36V 24V 1μF, 50V, 1206
22μF, 25V, 1812
16.5k 2.8V to 25V
1MHz
34k 2.4MHz 8.25k
3.6V to 15V 0.8V 10μF, 25V, 1210 4× 100μF, 6.3V, 1210 Open
VIN
230kHz 182k 575kHz 66.5k
3.6V to 15V 1.5V
3.6V to 15V 1.8V
10μF, 25V, 1210
10μF, 25V, 1210
4× 100μF, 6.3V, 1210
4× 100μF, 6.3V, 1210
549k
383k
VIN
VIN
270kHz
285kHz
154k 840kHz 42.2k
147k
1.0MHz
34k
4.1V to 15V
5.3V to 15V
7.5V to 15V
10.5V to 15V
9V to 24V
2.5V
3.3V
5V
8V
0.8V
4.7μF, 16V, 1206
4.7μF, 16V, 1206
4.7μF, 16V, 1206
2.2μV, 25V, 1206
4.7μF, 25V, 1206
2× 100μF, 6.3V, 1210
100μF, 6.3V, 1206
100μF, 6.3V, 1206
47μF, 16V, 1210
4× 100μF, 6.3V, 1210
226k
154k
93.1k
54.9k
Open
VIN
VIN
VIN
VIN
VIN
300kHz
345kHz
425kHz
550kHz
270kHz
137k
118k
93.1k
69.8k
154k
1.3MHz
1.6MHz
2.4MHz
2.4MHz
360kHz
23.7k
17.8k
8.25k
8.25k
113k
9V to 24V
9V to 24V
1.5V 4.7μF, 25V, 1206
1.8V 4.7μF, 25V, 1206
4× 100μF, 6.3V, 1210
3× 100μF, 6.3V, 1210
549k
383k
VIN
VIN
310kHz 133k 550kHz 69.8k
330kHz 124k 620kHz 60.4k
9V to 24V 2.5V 4.7μF, 25V, 1206
9V to 24V 3.3V 4.7μF, 25V, 1206
100μF, 6.3V, 1206
100μF, 6.3V, 1206
226k
154k
VIN
AUX
345kHz
425kHz
118k
93.1k
800kHz
1MHz
44.2k
34k
9V to 24V 5V 4.7μF, 25V, 1206
47μF, 16V, 1210
93.1k
AUX
500kHz
76.8k
1.4MHz 21.5k
www.D10a.t5aVShtoee24t4VU.co8mV 2.2μF, 25V, 1206
22μF, 16V, 1210
54.9k
AUX
590kHz
64.9k
2.2MHz 9.76k
16V to 24V 12V 2.2μF, 50V, 1206
22μF, 16V, 1210
34.8k
AUX
760kHz
47.5k
2.3MHz 9.09k
23V to 24V 18V 2.2μF, 50V, 1206
22μF, 25V, 1812
22.6k
AUX
800kHz
44.2k
2.4MHz 8.25k
18V to 36V 0.8V 1μF, 50V, 1206 4× 100μF, 6.3V, 1210 Open 2.8V to 25V 230kHz 182k 250kHz 169k
18V to 36V 1.5V 1μF, 50V, 1206 4× 100μF, 6.3V, 1210 549k 2.8V to 25V 270kHz 154k 360kHz 113k
18V to 36V 1.8V 1μF, 50V, 1206 3× 100μF, 6.3V, 1210 383k 2.8V to 25V 300kHz 137k 420kHz 95.3k
18V to 36V 2.5V 1μF, 50V, 1206
100μF, 6.3V, 1206
226k 2.8V to 25V 345kHz
118k
540kHz 71.5k
18V to 36V 3.3V 1μF, 50V, 1206
100μF, 6.3V, 1206
154k
AUX
385kHz 105k 675kHz 54.9k
18V to 36V 5V 1μF, 50V, 1206
47μF, 16V, 1210
93.1k
AUX
500kHz
76.8k
950kHz 36.5k
18V to 36V 8V 2.2μF, 50V, 1206
22μF, 16V, 1210
54.9k
AUX
550kHz
69.8k
1.45MHz 20.5k
18V to 36V 12V 2.2μF, 50V, 1206
22μF, 16V, 1210
34.8k
AUX
760kHz
47.5k
2.3MHz 9.09k
4.75V to 32V –3.3V 4.7μF, 50V, 1206 100μF, 6.3V, 1210
154k
AUX
345kHz 118k 675kHz 54.9k
7V to 31V –5V 4.7μF, 50V, 1206 100μF, 6.3V, 1210 93.1k
AUX
425kHz
93.1k
950kHz 36.5k
15V to 28V –8V 4.7μF, 50V, 1206
47μF, 16V, 1210
54.9k
AUX
550kHz
69.8k
1.45MHz 20.5k
20V to 24V –12V 4.7μF, 50V, 1206
22μF, 16V, 1210
34.8k
AUX
760kHz
47.5k
2.3MHz 9.09k
Note: An input bulk capacitance is required. Do not allow VIN + BIAS to exceed 56V. Refer to the Typical Performance Characteristics section for load
conditions.
8025f
11
11 Page | ||
| Páginas | Total 20 Páginas | |
| PDF Descargar | [ Datasheet LTM8025.PDF ] | |
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