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參數資料
| 型號： | TPS53314RGFT |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 穩壓器 |
| 英文描述： | SWITCHING REGULATOR, 1070 kHz SWITCHING FREQ-MAX, PQCC40 |
| 封裝： | 5 X 7 MM, GREEN, PLASTIC, VQFN-40 |
| 文件頁數： | 16/29頁 |
| 文件大小： | 800K |
| 代理商： | TPS53314RGFT |
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-
=
=
IN
OUT
IN
OUT
max
SW
IN
OUT
SW
IN(max)
IND ripple
max
V
1
3
L
I
f
V
I
f
V
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-
=
+
IN
OUT
max
TRIP
IND peak
SW
IN
DS on
max
V
1
I
8
R
L
f
V
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-
=
W
OUT
SW
IND ripple
V
10 mV
(1
D)
10 mV
L
f
L
f
ESR
0.6 V
I
0.6 V
60
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-
=
IND ripple
OUT
I
ESR
V
0.6
2
R1
R2
0.6
SLUSAK3
– MAY 2011
External Parts Selection
The external components selection is a simple process using D-CAP
Mode.
1. CHOOSE THE INDUCTOR
The inductance value should be determined to give the ripple current of approximately 1/4 to
of maximum
output current. Larger ripple current increases output ripple voltage and improves signal-to-noise ratio and
helps stable operation.
(6)
The inductor requires a low DCR to achieve good efficiency. It also requires enough room above peak
inductor current before saturation. The peak inductor current can be estimated in Equation 7.
(7)
2. CHOOSE THE OUTPUT CAPACITOR(S)
When organic semiconductor capacitor(s) or specialty polymer capacitor(s) are used, for loop stability,
capacitance and ESR should satisfy Equation 2. For jitter performance, Equation 8 is a good starting point to
determine ESR.
where
D is the duty factor
tSW is the switching period
the required output ripple slope is approximately 10 mV per tSW in terms of VVFB
(8)
3. DETERMINE THE VALUE OF R1 AND R2
The output voltage is programmed by the voltage-divider resistor, R1 and R2 shown in Figure 37. R1 is
connected between VFB pin and the output, and R2 is connected between the VFB pin and GND.
Recommended R2 value is from 10k
Ω to 20kΩ. Determine R1 using Equation 9.
(9)
Copyright
2011, Texas Instruments Incorporated
23
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| TPS53315 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:12-A Step-Down Regulator with Integrated Switcher |
| TPS53315RGFR | 功能描述:直流/直流開關調節器 12A Step-Down Reg RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關頻率:1.5 MHz 輸出電壓:0.5 V to 0.86 V 輸出電流:4 A 輸出端數量: 最大工作溫度: 安裝風格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5 |
| TPS53315RGFT | 功能描述:直流/直流開關調節器 12A Step-Down Reg RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關頻率:1.5 MHz 輸出電壓:0.5 V to 0.86 V 輸出電流:4 A 輸出端數量: 最大工作溫度: 安裝風格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5 |
| TPS53316 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:High-Efficiency, 5-A Step-Down Regulator with Integrated Switcher |
| TPS53316EVM-075 | 功能描述:電源管理IC開發工具 TPS53316 Eval Mod RoHS:否 制造商:Maxim Integrated 產品:Evaluation Kits 類型:Battery Management 工具用于評估:MAX17710GB 輸入電壓: 輸出電壓:1.8 V |
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