參數(shù)資料
型號(hào)： TPS62260DRV
廠商： Texas Instruments, Inc.
英文描述： 2.25 MHz 600 mA Step Down Converter in 2x2SON/TSOT-23 Package
中文描述： 2.25兆赫600毫安降壓轉(zhuǎn)換器2x2SON/TSOT-23包
文件頁數(shù)： 20/32頁
文件大小： 951K
代理商： TPS62260DRV
www.ti.com
I
Lmax
I
outmax
I
L
2
(2)
Output Capacitor Selection
I
RMSCout
Vout
1
Vout
Vin
L
1
2
3
(3)
Vout
Vout
1
Vout
Vin
L
1
8
Cout
ESR
(4)
TPS62260, TPS62261, TPS62262
SLVS763–JUNE 2007
APPLICATION INFORMATION (continued)
With:
f = Switching Frequency (2.25MHz typical)
L = Inductor Value
I
L
= Peak to Peak inductor ripple current
I
Lmax
= Maximum Inductor current
A more conservative approach is to select the inductor current rating just for the switch current limit I
LIMF
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 [mm
3
]
2.5x2.0x1.0max
2.5x2.0x1.2max
2.5x2.0x1.0max
2.5x2.0x1.2max
3x3x1.5max
Inductance
μ
H
2.0
2.0
2.2
2.2
2.2
INDUCTOR TYPE
MIPS2520D2R2
MIPSA2520D2R2
KSLI-252010AG2R2
LQM2HPN2R2MJ0L
LPS3015 2R2
SUPPLIER
FDK
FDK
Htachi Metals
Murata
Coilcraft
The advanced fast-response voltage mode control scheme of the TPS62260 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
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參數(shù)描述
TPS62260DRVR 功能描述:直流/直流開關(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
TPS62260DRVRG4 功能描述:直流/直流開關(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
TPS62260DRVT 功能描述:直流/直流開關(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
TPS62260DRVT 制造商:Texas Instruments 功能描述:IC STEP-DOWN CONVERTER SON-6 制造商:Texas Instruments 功能描述:IC, STEP-DOWN CONVERTER, SON-6
TPS62260DRVTG4 功能描述:直流/直流開關(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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