參數(shù)資料
型號(hào)： TPS62110MRSAREP
廠商： TEXAS INSTRUMENTS INC
元件分類： 穩(wěn)壓器
英文描述： 2.4 A SWITCHING REGULATOR, 1100 kHz SWITCHING FREQ-MAX, PQCC16
封裝： GREEN, PLASTIC, QFN-16
文件頁(yè)數(shù)： 10/25頁(yè)
文件大小： 630K
代理商： TPS62110MRSAREP
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INPUT CAPACITOR SELECTION
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FEEDFORWARD CAPACITOR SELECTION
RECOMMENDED CAPACITORS
SLVS630C – APRIL 2007 – REVISED MAY 2008 .............................................................................................................................................................. www.ti.com
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:
Where the highest output voltage ripple occurs at the highest input voltage VI.
The nature of the buck converter is a pulsating input current; therefore, 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 show
a good performance because of their low ESR value, and they are less sensitive against voltage transients
compared to tantalum capacitors. Place the input capacitor as close as possible to the input pin of the IC for best
performance
The feedforward capacitor (Cff) is needed to compensate for parasitic capacitance from the feedback pin to GND.
Typically, a value of 4.7 pF to 22 pF is needed for an output voltage divider with a equivalent resistance (R1 in
parallel with R2) in the 150 k
range. The value can be chosen based on best transient performance and lowest
output voltage ripple in PFM mode.
It is recommended that only X5R or X7R ceramic capacitors be used as input/output capacitors. Ceramic
capacitors show a dc-bias effect. This effect reduces the effective capacitance when a dc-bias voltage is applied
across a ceramic capacitor, as on the output and input capacitor of a dc/dc converter. The effect may lead to a
significant capacitance drop especially for high input/output voltages and small capacitor packages. See the
manufacturer's data sheet about the performance with a dc bias voltage applied. It may be necessary to choose
a higher voltage rating or nominal capacitance value to get the required value at the operating point. The
capacitors listed in Table 3 have been tested with the TPS62110 with good performance.
Table 3. List of Capacitors
MANUFACTURER
PART NUMBER
SIZE
VOLTAGE
CAPACITANCE
TYPE
TMK316BJ106KL
1206
25 V
10 F
Taiyo Yuden
Ceramic
EMK325BJ226KM
1210
16 V
22 F
C3225X5R1E106M
25 V
10 F
1210
TDK
C3225X7R1C226M
16 V
22 F
Ceramic
C3216X5R1E106MT
1206
25 V
10 F
18
Copyright 2007–2008, Texas Instruments Incorporated
Product Folder Link(s): TPS62110-EP TPS62111-EP TPS62112-EP
相關(guān)PDF資料
PDF描述
TPS62110RSAT 2.4 A SWITCHING REGULATOR, 1100 kHz SWITCHING FREQ-MAX, PQCC16
TPS62113RSAT 2.4 A SWITCHING REGULATOR, 1100 kHz SWITCHING FREQ-MAX, PQCC16
TPS62110RSAR 2.4 A SWITCHING REGULATOR, 1100 kHz SWITCHING FREQ-MAX, PQCC16
TPS62111RSATG4 2.4 A SWITCHING REGULATOR, 1100 kHz SWITCHING FREQ-MAX, PQCC16
TPS62111RSAR 2.4 A SWITCHING REGULATOR, 1100 kHz SWITCHING FREQ-MAX, PQCC16
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
TPS62110QRSAREP 功能描述:IC REG BUCK SYNC ADJ 1.5A 16QFN RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 開關(guān)穩(wěn)壓器 系列:- 標(biāo)準(zhǔn)包裝:20 系列:SIMPLE SWITCHER® 類型:降壓（降壓） 輸出類型:固定 輸出數(shù):1 輸出電壓:12V 輸入電壓:4 V ~ 60 V PWM 型:電壓模式 頻率 - 開關(guān):52kHz 電流 - 輸出:1A 同步整流器:無(wú) 工作溫度:-40°C ~ 125°C 安裝類型:通孔 封裝/外殼:16-DIP（0.300"，7.62mm） 包裝:管件 供應(yīng)商設(shè)備封裝:16-DIP 其它名稱:*LM2575HVN-12LM2575HVN-12
TPS62110QRSARQ1 功能描述:直流/直流開關(guān)轉(zhuǎn)換器 AC Adj,1.5A,17V Vin Step-Down Converter RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關(guān)頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數(shù)量:2 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT
TPS62110RSA 制造商:Texas Instruments 功能描述:
TPS62110RSAR 功能描述:直流/直流開關(guān)調(diào)節(jié)器 Adj 1.5-A 17-V 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
TPS62110RSARG4 功能描述:直流/直流開關(guān)轉(zhuǎn)換器 Adj 1.5-A 17-V Vin Step-Down Converter RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關(guān)頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數(shù)量:2 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT
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