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| 型号： | PTH05010YAST |
| 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： | DIP-20 |
| 文件页数： | 18/18页 |
| 文件大小： | 773K |
| 代理商： | PTH05010YAST |
www.ti.com
Designing for Very Fast Load Transients
PTH03010Y
PTH05010Y
PTH12010Y
SLTS223A–MARCH 2004–REVISED OCTOBER 2005
APPLICATION INFORMATION (continued)
Table 1. Input/Output Capacitors (continued)
Capacitor Characteristics
Quantity
Max Ripple
Capacitor Vendor,
Vendor
Working
Max ESR
Physical
Value
Current
Input
Output
Type/Series (Style)
Part Number
Voltage
at 100 kHz
Size
(F)
at 85°CBus
Bus
(V)
()
(mm)
(Irms) (mA)
Panasonic, Poly-Aluminum:
S/SE (SMD)
6.3
180
0.005
4000
7,3 × 4,3 ×
2(2)
N/R(3)
EEFSE0J181R
4,2
Sanyo
SEPC, Os-con (Radial)
6.3
470
0.008
5700
10 × 13
1
≤1
6SEPC470M
SVP, (SMD)
6.3
470
0.015
4200
11 × 11,9
1
≤2
6SVP470M
TPE, Poscap (SMD)
6.3
470
0.018
3500
7,3 × 4,3
1
≤2
6TPE470MI
AVX, Tantalum TPS (SMD)
10
470
0.045
1723
7,3 L × 5,7 W
1
≤5
TPSE477M010R0045
× 4,1 H
10
470
0.060
1826
1
≤5
TPSV477M010R0060
Kemet, Poly-Tantalum
T520, (SMD)
10
330
0.040
1800
2
≤5
T520X337M010AS
4,3 W × 7,3 L
T530, (SMD)
10
330
0.010
5200
× 4H
2
≤1
T530X337M010ASE010
Vishay-Sprague
595D, Tantalum (SMD)
10
470
0.100
1440
7,2 L × 6W
1
≤5
595D477x0010r2t
94SP, Poly Aluminum (Radial)
10
470
0.015
4510
10 × 10
1
≤2
94SP477X0010FBP
94SVP, Poly-Aluminum (SMD)
6.3
470
0.017
3960
8 × 12
1
≤3
94SVP477X06R3E12
Kemet, Ceramic X5R (SMD)
16
10
0.002
–
3225 mm
1
≤5
C1210C106M4PAC
6.3
47
3225 mm
1
≤5
C1210C476K9PAC
Murata, Ceramic X5R (SMD)
6.3
100
0.002
–
3225 mm
1(4)
≤3
GRM32ER60J107M
6.3
47
3225 mm
1(4)
≤5
GRM32ER60J476M
16
22
1(4)
≤5
GRM32ER61C226K
16
10
1(4)
≤5
GRM32DR61C106K
TDK, Ceramic X5R (SMD)
6.3
100
0.002
–
3225 mm
1(4)
≤3
C3225X5R0J107MT
6.3
47
3225 mm
1(4)
≤5
C3225X5R0J476MT
16
22
1(4)
≤5
C3225X5R1C226MT
16
10
1(4)
≤5
C3225X5R1C106MT
(2) A total capacitance of 360 F is acceptable based on the combined ripple current rating.
(3) N/R –Not recommended. The capacitor voltage rating does not meet the minimum derated operating limits.
(4) A ceramic capacitor is recoommended 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 8200 F, the selection of output capacitors becomes more important.
9
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