參數(shù)資料
型號(hào)： TPS62250DRVR
廠商： TEXAS INSTRUMENTS INC
元件分類(lèi)： 穩(wěn)壓器
英文描述： 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(yè)數(shù)： 13/29頁(yè)
文件大?。?/td> 1207K
代理商： TPS62250DRVR
DIL + Vout
1 *
Vout
Vin
L
(1)
I
Lmax + Ioutmax )
DIL
2
(2)
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)
SLVS842 – SEPTEMBER 2008.......................................................................................................................................................................................... www.ti.com
With:
f = Switching Frequency (2.25MHz typical)
L = Inductor Value
ΔIL = Peak-to-Peak inductor ripple current
ILmax = Maximum Inductor current
A more conservative approach is to select the inductor current rating just for the switch current limit ILIMF of the
converter.
Accepting larger values of ripple current allows the use of lower inductance values, but results in higher output
voltage ripple, greater core losses, and lower output current capability.
The total losses of the coil have a strong impact on the efficiency of the DC/DC conversion and consist of both
the losses in the dc resistance (R(DC)) and the following frequency-dependent components:
The losses in the core material (magnetic hysteresis loss, especially at high switching frequencies)
Additional losses in the conductor from the skin effect (current displacement at high frequencies)
Magnetic field losses of the neighboring windings (proximity effect)
Radiation losses
Table 1. List of Inductors
DIMENSIONS [mm3]
Inductance
H
INDUCTOR TYPE
SUPPLIER
2.5x2.0x1.0max
2.0
MIPS2520D2R2
FDK
2.5x2.0x1.2max
2.0
MIPSA2520D2R2
FDK
2.5x2.0x1.0max
2.2
KSLI-252010AG2R2
Htachi Metals
2.5x2.0x1.2max
2.2
LQM2HPN2R2MJ0L
Murata
3x3x1.5max
2.2
LPS3015 2R2
Coilcraft
The advanced fast-response voltage mode control scheme of the TPS62250 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.
20
Copyright 2008, Texas Instruments Incorporated
Product Folder Link(s): TPS62250
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
TPS62250DRVRG4 功能描述:直流/直流開(kāi)關(guān)調(diào)節(jié)器 2.25MHz,1A Peak Crnt Ltd Converter RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開(kāi)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
TPS62250DRVT 功能描述:直流/直流開(kāi)關(guān)調(diào)節(jié)器 2.25MHz,1A Peak Crnt Ltd Step-Down Cnvtr RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開(kāi)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
TPS62250DRVTG4 功能描述:直流/直流開(kāi)關(guān)調(diào)節(jié)器 2.25MHz,1A Peak Crnt Ltd Converter RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開(kāi)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
TPS62260DDCR 功能描述:直流/直流開(kāi)關(guān)調(diào)節(jié)器 2.25MHz 600mA Step- Down Converter RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開(kāi)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
TPS62260DDCRG4 功能描述:直流/直流開(kāi)關(guān)調(diào)節(jié)器 2.25MHz 600mA Step- Down Converter RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開(kāi)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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