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參數(shù)資料
| 型號： | TPS62050DGSG4 |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 1.4 A SWITCHING REGULATOR, 1000 kHz SWITCHING FREQ-MAX, PDSO10 |
| 封裝： | GREEN, PLASTIC, MSOP-10 |
| 文件頁數(shù)： | 10/25頁 |
| 文件大?。?/td> | 602K |
| 代理商： | TPS62050DGSG4 |
www.ti.com
I
RMS(Co) +
V
O
1–
V
O
V
I
L
f
1
2
3
DVO + VO
1 *
V
O
V
I
L
f
1
8
Co
f )
R
ESR
I
RMS +
I
O
(max)
V
O
V
I
1 *
V
O
V
I
TPS62050, TPS62051
TPS62052, TPS62054, TPS62056
SLVS432D – SEPTEMBER 2002 – REVISED OCTOBER 2003
APPLICATION INFORMATION (continued)
OUTPUT CAPACITOR SELECTION
The output capacitor should have a minimum value of 22F. For best performance, a low ESR ceramic output
capacitor is needed.
For completeness, the RMS ripple current is calculated as:
The overall output ripple voltage is the sum of the voltage spike caused by the output capacitor ESR plus the
voltage ripple caused by charge and discharging the output capacitor:
The highest output voltage ripple occurs at the highest input voltage VI.
INPUT CAPACITOR SELECTION
Because the buck converter has a pulsating input current, a low ESR input capacitor is required for best input
voltage filtering and minimizing the interference with other circuits caused by high input voltage spikes. The input
capacitor should have a minimum value of 10 F and can be increased without any limit for better input voltage
filtering. The input capacitor should be rated for the maximum input ripple current calculated as:
The worst case RMS ripple current occurs at D = 0.5 and is calculated as: IRMS = IO/2. Ceramic capacitors have a
good performance because of their low ESR value and they are less sensitive to voltage transients compared to
tantalum capacitors. Place the input capacitor as close as possible to the input pin of the IC for best
performance.
Table 3. Capacitors
MANUFACTURER
PART NUMBER
SIZE
VOLTAGE
CAPACITANCE
TYPE
JMK212BJ106MG
0805
6.3 V
10 F
Ceramic
JMK316BJ106ML
1206
6.3 V
10 F
Ceramic
JMK316BJ226ML
1206
6.3 V
22 F
Ceramic
Taiyo Yuden
LMK316BJ475ML
1206
10 V
4.7 F (1)
Ceramic
EMK316BJ475ML
1206
16 V
4.7 F (1)
Ceramic
EMK325BJ106KN-T
1210
16 V
10 F
Ceramic
Kemet
C1206C106M9PAC
1206
6.3 V
10 F
Ceramic
C2012X5R0J106M
0805
6.3 V
10 F
Ceramic
TDK
C3216X5R0J226M
1206
6.3 V
22 F
Ceramic
C3216X5R1A106M
1206
10 V
10 F
Ceramic
(1)
Connect two in parallel.
18
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| TPS62051DGS | 功能描述:直流/直流開關(guān)調(diào)節(jié)器 Adj 800-mA 10V Vin Step-Down Converter RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關(guān)頻率:1.5 MHz 輸出電壓:0.5 V to 0.86 V 輸出電流:4 A 輸出端數(shù)量: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5 |
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