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| 型号： | PTH05050YAZT |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 电源模块 |
| 英文描述： | 1-OUTPUT DC-DC REG PWR SUPPLY MODULE |
| 封装： | ROHS COMPLIANT, DIP-6 |
| 文件页数： | 17/18页 |
| 文件大小： | 1004K |
| 代理商： | PTH05050YAZT |
www.ti.com
Designing for Very Fast Load Transients
PTH03050Y
PTH05050Y
PTH12050Y
SLTS221A–MARCH 2004–REVISED OCTOBER 2005
APPLICATION INFORMATION (continued)
Table 1. Input/Output Capacitors (continued)
Capacitor Characteristics
Quantity
Capacitor Vendor,
Vendor
Working
Max ESR
Max Ripple
Physical
Value
Input
Output
Type/Series (Style)
Part Number
Voltage
at 100 kHz
Current at 85°CSize
(F)
Bus
(V)
()
(Irms) (mA)
(mm)
Nichicon Aluminum
WG (SMD)
10
470
0.150
670
10×10
1
UWG1A471MNR1GS
HD (Radial)
10
470
0.072
760
8×11.5
1
UHD1A471MPR
PM (Radial)
10
470
0.120
600
10×12.5
1
UPM1A471MPH6
Sanyo
SP, Os-con (Radial)
10
470
0.015
4500
10×10.5
1
≤2
10SP470M
SVPA (SMD)
6.3
470
0.020
>4100
7,9×10
1
≤2
6SVPA470M
TPE, Poscap (SMD)
6.3
220
0.025
2400
7.3×4.3
1
≤3
6TPE220ML
AVX, Tantalum
10
330
0.045
1723
1
≤5
TPSE337M010R0045
7.3L ×5.7W
×4.1H
TPS (SMD)
10
330
0.060
1826
1
≤5
TPSV337M010R0060
Kemet, Poly-Tantalum
4.3W ×7.3L
T520 (SMD)
10
330
0.040
1800
1
≤5
T520X337M010ASE045
×4.0H
T530 (SMD)
10
330
0.010
>5000
1
≤1
T530X337M010ASE010
Vishay-Sprague
7.2L×6W
595D, Tantalum (SMD)
10
330
0.100
1040
1
≤5
595D377x0010D2T
×4.1H
594D, Tantalum (SMD)
10
330
0.045
2360
1
≤5
594D337X0016R2T
10x10.5
94SVP, Poly-Aluminum (Radial)
6.3
330
0.025
3500
1
≤3
94SA337X06R3FBP
Kemet, Ceramic X5R (SMD)
16
10
0.002
–
1210 /3225
1
≤5
C1210C106M4PAC
6.3
47
0.002
3225 mm
1
≤5
C1210C476K9PAC
Murata, Ceramic X5R (SMD)
6.3
100
0.002
–
3225 mm
1(4)
≤3
GRM32ER60J107M
6.3
47
0.002
3225 mm
1(4)
≤5
GRM32ER60J476M
16
22
0.002
1(4)
≤5
GRM32ER61C226K
16
10
0.002
1(4)
≤5
GRM32DR61C106K
TDK, Ceramic X5R (SMD)
6.3
100
0.002
–
3225 mm
1(4)
≤3
C3225X5R0J107MT
6.3
47
0.002
3225 mm
1(4)
≤5
C3225X5R0J476MT
16
22
0.002
1(4)
≤5
C3225X5R1C226MT
16
10
0.002
1(4)
≤5
C3225X5R1C106MT
(4) A ceramic capacitor can be used to compliment electrolytic types at the input to further reduce high-frequency ripple current.
The transient response of the DC/DC converter has been characterized using a load transient with a di/dt of
1A/s. The typical voltage deviation for this load transient is given in the data sheet specification table using the
optional value of output capacitance. As the di/dt of a transient is increased, the response of a converter's
regulation circuit ultimately depends on its output capacitor decoupling network. This is an inherent limitation with
any DC/DC converter once the speed of the transient exceeds its bandwidth capability. If the target application
specifies a higher di/dt or lower voltage deviation, the requirement can only be met with additional output
capacitor decoupling. In these cases special attention must be paid to the type, value and ESR of the capacitors
selected.
If the transient performance requirements exceed that specified in the data sheet, or the total amount of load
capacitance is above 3300 F, the selection of output capacitors becomes more important.
8
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