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參數(shù)資料
| 型號： | TB7101F |
| 廠商： | Toshiba Corporation |
| 元件分類： | DC/DC變換器 |
| 英文描述： | Step-down DC-DC Converter IC |
| 中文描述： | 降壓型DC - DC轉(zhuǎn)換器集成電路 |
| 文件頁數(shù)： | 11/17頁 |
| 文件大小： | 300K |
| 代理商： | TB7101F |
TB7101F(T5L1.2,F) , TB7101F(T5L1.5,F)
TB7101F(T5L1.8,F) , TB7101F(T5L2.5,F)
TB7101F(T5L3.3,F)
V
I
f
IN
L
OSC
3
300
1
=
Figure 2: Inductor current waveform
Output capacitor
2007-09-06
11
H
V
V
mA
MHz
μ
7
V
V
V
V
V
L
OUT
OUT
Δ
IN
5
3
5
=
=
The capacitance of the output ceramic capacitor is greatly affected by temperature. Select a product whose
temperature characteristics (such as B-characteristic) are excellent. The capacitance value should be to more than 10
μ
F,
and set to an optimum value by, for example, enlarging the output capacitor when there is instability under use
conditions ,or when there is a large ripple voltage or drop in output voltage under heavy loads. Ceramic capacitors can
be used to achieve low output ripple, though it is more difficult to achieve phase compensation with ceramic capacitors
because the equivalent series resistance (ESR) of ceramic capacitors is lower. For this reason, perform a careful
evaluation when using ceramic capacitors.
Precautions
Please select parts after confirming the actual operation in the customer set and considering the input voltage the
output voltage, the output current, the temperature, the characteristics or the kind of capacitor, and the inductor.
If the voltage between the input and output is low, the influence of the on-state voltage of the switch power
MOSFET is greater, causing the voltage across the inductor to decrease. For this reason, it may become
impossible for the required inductor current to flow, resulting in lower performance or unstable operation of the
DC-DC converter. As a rough standard, keep the input-output voltage potential difference at or above 1 V, taking
the on-state voltage of the power MOSFET into consideration.
The lowest output voltage that can be set is 0.8 V (typ.).
There is an antistatic diode between the ENB and V
IN
pins. The voltage between the ENB and V
IN
pins should
satisfy the rating V
ENB
- V
IN
< 0.3 V
If operation becomes unstable due to switching noise under a heavy load, please mount a by-pass capacitor C
cc
between the SGND pin and the VIN pin.
OSC
f
1
T
=
IN
OUT
V
ON
V
T
T
=
0
Δ
I
L
IL
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TB7101F(T5L1.2,F) | 功能描述:直流/直流開關(guān)轉(zhuǎn)換器 INCORRECT MOUSER P/N 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 |
| TB7101F(T5L1.5,F) | 功能描述:直流/直流開關(guān)轉(zhuǎn)換器 DC-DC Buck 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 |
| TB7101F(T5L1.8,F) | 功能描述:直流/直流開關(guān)轉(zhuǎn)換器 DC-DC Buck 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 |
| TB7101F(T5L2.5,F) | 功能描述:直流/直流開關(guān)轉(zhuǎn)換器 DC-DC Buck 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 |
| TB7101F(T5L3.3,F) | 功能描述:直流/直流開關(guān)轉(zhuǎn)換器 DC-DC Buck 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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