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參數資料
| 型號： | TPS62270DRVR |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 穩壓器 |
| 英文描述： | 0.84 A SWITCHING REGULATOR, 2500 kHz SWITCHING FREQ-MAX, PDSO6 |
| 封裝： | 2 X 2 MM, 0.80 MM HEIGHT, GREEN, PLASTIC, SON-6 |
| 文件頁數： | 8/24頁 |
| 文件大小： | 882K |
| 代理商： | TPS62270DRVR |
Output Capacitor Selection
I
RMSCout + Vout
1 *
Vout
Vin
L
1
2
3
(3)
DVout + Vout
1 *
Vout
Vin
L
1
8
Cout
)
ESR
(4)
Input Capacitor Selection
SLVS799C – NOVEMBER 2007 – REVISED JANUARY 2009 ........................................................................................................................................... www.ti.com
Table 2. List of Inductors
DIMENSIONS
INDUCTOR TYPE
SUPPLIER
[mm3]
2.5 × 2.0 × 1.0
MIPS2520
FDK
2.5 × 2.0 × 1.2
MIPSA2520
FDK
2.5 × 2.0 × 1.0
KSLI-252010AG2R2
Hitachi Metals
2.5 × 2.0 × 1.2
LQM2HPN2R2MJ0L
Murata
The advanced fast-response voltage mode control scheme of the TPS62270 allows the use of tiny ceramic
capacitors. Ceramic capacitors with low ESR values have the lowest output voltage ripple and are
recommended. The output capacitor requires either an X7R or X5R dielectric. Y5V and Z5U dielectric capacitors,
aside from their wide variation in capacitance over temperature, become resistive at high frequencies.
At nominal load current, the device operates in PWM mode and the RMS ripple current is calculated as:
At nominal load current, the device operates in PWM mode and the overall output voltage ripple is the sum of the
voltage spike caused by the output capacitor ESR plus the voltage ripple caused by charging and discharging the
output capacitor:
At light load currents the converter operates in Power Save Mode and the output voltage ripple is dependent on
the output capacitor and inductor value. Larger output capacitor and inductor values minimize the voltage ripple
in PFM mode and tighten DC output accuracy in PFM mode.
An input capacitor is required for best input voltage filtering, and minimizing the interference with other circuits
caused by high input voltage spikes. For most applications, a 4.7
F to 10F ceramic capacitor is recommended.
Because ceramic capacitor loses up to 80% of its initial capacitance at 5 V, it is recommended that 10
F input
capacitors be used for input voltages >4.5V. The input capacitor can be increased without any limit for better
input voltage filtering. Take care when using only small ceramic input capacitors. When a ceramic capacitor is
used at the input and the power is being supplied through long wires, such as from a wall adapter, a load step at
the output or VIN step on the input can induce ringing at the VIN pin. This ringing can couple to the output and
be mistaken as loop instability or could even damage the part by exceeding the maximum ratings.
Table 3. List of Capacitors
CAPACITANCE
TYPE
SIZE mm3
SUPPLIER
4.7
F
GRM188R60J475K
0603: 1.6 × 0.8 × 0.8 mm3
Murata
10
F
GRM188R60J106M69D
0603: 1.6 × 0.8 × 0.8 mm3
Murata
16
Copyright 2007–2009, Texas Instruments Incorporated
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相關代理商/技術參數 |
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| TPS62270DRVRG4 | 功能描述:直流/直流開關調節器 2.25MHz 400mA Step Down Converter 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 |
| TPS62270DRVT | 功能描述:直流/直流開關調節器 2.25MHz 400mA Step- Down Converter 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 |
| TPS62270DRVTG4 | 功能描述:直流/直流開關調節器 2.25MHz 400mA Step Down Converter 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 |
| TPS62270EVM-306 | 功能描述:電源管理IC開發工具 TPS62270EVM-306 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 |
| TPS62272DRVR | 功能描述:直流/直流開關轉換器 2.25MHz 400mA Step- Down Converter RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數量:2 最大工作溫度:+ 85 C 安裝風格:SMD/SMT |
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