參數(shù)資料
型號： PTH04070WAST
廠商： TEXAS INSTRUMENTS INC
元件分類： 穩(wěn)壓器
英文描述： 3 A SWITCHING REGULATOR, PDMA5
封裝： DIP-5
文件頁數(shù)： 2/17頁
文件大?。?/td> 409K
代理商： PTH04070WAST
www.ti.com
Designing for Load Transients
SLTS227B – SEPTEMBER 2004 – REVISED OCTOBER 2007
The transient response of the dc/dc converter has been characterized using a load transient with a di/dt of
1 A/
μs. 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 those specified in the data sheet, the selection of output
capacitors becomes more important. Review the minimum ESR in the characteristic data sheet for details on the
capacitance maximum.
Table 3. Recommended Input/Output Capacitors
CAPACITOR CHARACTERISTICS
QUANTITY
85
°C
CAPACITOR VENDOR/
EQUIVALENT
VENDOR
WORKING
MAXIMUM
PHYSICAL
COMPONENT
VALUE
SERIES
INPUT
OUTPUT
NUMBER
VOLTAGE
RIPPLE
SIZE
SERIES
(
μF)
RESISTANCE
BUS(1)
BUS
(V)
CURRENT
(mm)
(ESR) (
)
(Irms) (mA)
Panasonic WA (SMT)
10
120
0.035
2800
8
×6.9
1
≤ 4(1)
EEFWA1A121P(2)
FC (SMT)
25
47
0.400
230
8
×6.2
1
1(1)
EEVFC1E470P(2)
Panasonic SL SP-cap(SMT)
6.3
47
0.018
2500
7.3
×4.3
1
≤ 3
EEFCD0J470R
6.3
56
0.009
3000
7.3
×4.3
1
≤ 2
EEFSL0J560R
United Chemi-con PXA (SMT)
10
47
0.031
2250
6.3
×5.7
1
PXA10VC470MF60TP
FS
10
100
0.040
2100
6.3
×9.8
1
≤ 5
10FS100M
LXZ
16
100
0.250
290
6.3
×11.5
1
LXZ16VB101M6X11LL
MVZ (SMT)
16
100
0.440
230
6.3
×5.7
1
MVZ16VC101MF60TP
Nichicon UWG (SMT)
16
100
0.400
230
8
×6.2
1
UWG1C101MCR1GS
F559(Tantalum)
10
100
0.055
2000
7.7
×4.3
1
≤ 5
F551A107MN
PM
10
100
0.550
210
6
×11
1
UPM1A101MEH
Sanyo Os-con\ POS-Cap SVP
10
68
0.025
2400
7.3
×4.3
1
≤ 5
10TPE68M
(SMT)
6.3
47
0.074
1110
5
×6
1
≤ 5
6SVP47M
SP
10
56
0.045
1710
6.3
×5.0
1
≤ 5
10SP56M
AVX Tantalum TPS (SMD)
10
47
0.10
1100
7.3L
×4.3W
1
≤ 5
TPSD476M010R0100
10
47
0.060
> 412
×4.1H
1
≤ 5
TPSB476M010R0500
Kemet T520 (SMD)
10
68
0.060
>1200
7.3L
×5.7W
1
≤ 5
T520V686M010ASE060
AO-CAP
6.3
47
0.028
>1100
×4.0H
1
≤ 3
A700V476M006AT
Vishay/Sprague 594D/595D
10
68
0.100
>1000
7.3L
×6.0W
1
≤ 5
594D686X0010C2T
(SMD)
10
68
0.240
680
×4.1H
1
≤ 5
595D686X0010C2T
94SL
16
47
0.070
1550
8
×5
1
≤ 5
94SL476X0016EBP
TDK Ceramic X5R
6.3
22
0.002
>1400
1210 case
≥ 2(3)
≤ 3
C3225X5R0J226KT/MT
Murata Ceramic X5R
6.3
22
0.002
>1000
3225 mm
≥ 2(3)
≤ 3
GRM32ER61J223M
Kemet
6.3
22
0.002
>1000
≥ 2(3)
≤ 3
C1210C226K9PAC
TDK Ceramic X5R
6.3
47
0.002
>1400
1210 case
≥ 1
≤ 3
C3225X5R0J476KT/MT
Murata Ceramic X5R
6.3
47
0.002
>1000
3225 mm
≥ 1
≤ 3
GRM32ER60J476M/6.3
Kemet
6.3
47
0.002
>1000
≥ 1
≤ 3
C1210C476K9PAC
(1)
A ceramic capacitor is required on both the input and the output. An electrolytic capacitor can be added to the output for improved
transient response.
(2)
An optional through-hole capacitor available.
(3)
A total capacitance of 44
μF is an acceptable replacement for a single 47-μF capacitor.
10
Copyright 2004–2007, Texas Instruments Incorporated
Product Folder Link(s): PTH04070W
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
PTH04070WAZ 功能描述:DC/DC轉(zhuǎn)換器 3-A 3.3/5-V Input Adj Swtch Regulator RoHS:否 制造商:Murata 產(chǎn)品: 輸出功率: 輸入電壓范圍:3.6 V to 5.5 V 輸入電壓（標(biāo)稱）: 輸出端數(shù)量:1 輸出電壓（通道 1）:3.3 V 輸出電流（通道 1）:600 mA 輸出電壓（通道 2）: 輸出電流（通道 2）: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體尺寸:
PTH04070WAZ 制造商:Texas Instruments 功能描述:IC 制造商:Texas Instruments 功能描述:IC, ADJ SWITCHING REGULATOR, SMT MODULE
PTH04070WAZT 功能描述:DC/DC轉(zhuǎn)換器 3-A 3.3/5-V Input Adj Swtch Regulator RoHS:否 制造商:Murata 產(chǎn)品: 輸出功率: 輸入電壓范圍:3.6 V to 5.5 V 輸入電壓（標(biāo)稱）: 輸出端數(shù)量:1 輸出電壓（通道 1）:3.3 V 輸出電流（通道 1）:600 mA 輸出電壓（通道 2）: 輸出電流（通道 2）: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體尺寸:
PTH04T220W 制造商:TI 制造商全稱:Texas Instruments 功能描述:16-A, 2.2-V to 5.5-V INPUT, NON-ISOLATED, WIDE-OUTPUT, ADJUSTABLE POWER MODULE WITH TURBOTRANS
PTH04T220WAD 功能描述:DC/DC轉(zhuǎn)換器 16-A 2.2-V to 5.5-V Input RoHS:否 制造商:Murata 產(chǎn)品: 輸出功率: 輸入電壓范圍:3.6 V to 5.5 V 輸入電壓（標(biāo)稱）: 輸出端數(shù)量:1 輸出電壓（通道 1）:3.3 V 輸出電流（通道 1）:600 mA 輸出電壓（通道 2）: 輸出電流（通道 2）: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體尺寸:
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