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参数资料
| 型号： | LT3463AEDD |
| 厂商： | Linear Technology |
| 文件页数： | 5/8页 |
| 文件大小： | 0K |
| 描述： | IC REG INV ADJ 0.25A DL 10DFN |
| 标准包装： | 121 |
| 类型： | 反相 |
| 输出类型： | 可调式 |
| 输出数： | 2 |
| 输出电压： | 1.25 V ~ 40 V |
| 输入电压： | 2.4 V ~ 15 V |
| 电流 - 输出： | 250mA |
| 同步整流器： | 无 |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 10-WFDFN 裸露焊盘 |
| 包装： | 管件 |
| 供应商设备封装： | 10-DFN（3x3） |
LT3463/LT3463A
APPLICATIO S I FOR ATIO
Choosing an Inductor
Several recommended inductors that work well with the
LT3463 are listed in Table 1, although there are many other
manufacturers and devices that can be used. Consult each
manufacturer for more detailed information and for their
entire selection of related parts. Many different sizes and
shapes are available. Use the equations and recommenda-
tions in the next few sections to find the correct inductance
value for your design.
Table 1. Recommended Inductors
such as battery powered applications, use the minimum
V IN value in the above equation. For most regulators with
output voltages below 7V, a 4.7 μ H inductor is the best
choice, even though the equation above might specify a
smaller value.
For higher output voltages, the formula above will give
large inductance values. For a 3V to 20V converter (typical
LCD Bias application), a 21 μ H inductor is called for with
the above equation, but a 10 μ H inductor could be used
without much reduction in the maximum output current.
PART
CMD4D06
CDRH3D16
LPO4812
LQH32C
LQH31C
MAX MAX HEIGHT
L ( μ H) I DC (mA) DCR( ? ) (mm) MANUFACTURER
4.7 750 0.22 0.8 Sumida
10 500 0.46 (847) 956-0666
22 310 1.07 www.sumida.com
10 500 0.19 1.8 Sumida
22 310 0.36
4.7 600 0.16 1.2 Coilcraft
10 400 0.30 (847) 639-6400
22 280 0.64 www.coilcraft.com
10 450 0.39 1.8 Murata
15 300 0.75 (714) 852-2001
22 250 0.92 www.murata.com
4.7 340 0.85 1.8 Murata
Inductor Selection—Inverting Regulator
The formula below calculates the appropriate inductor
value to be used for an inverting regulator using the
LT3463 (or at least provides a good starting point). This
value provides a good tradeoff in inductor size and system
performance. Pick a standard inductor close to this value
(both inductors should be the same value). A larger value
can be used to slightly increase the available output
current, but limit it to around twice the value calculated
below, as too large of an inductance will increase the
output voltage ripple without providing much additional
output current. A smaller value can be used (especially for
Inductor Selection—Boost Regulator
The formula below calculates the appropriate inductor
systems with output voltages greater than 12V) to give a
smaller physical size. Inductance can be calculated as:
L = 2 ?
?
? t OFF
?
valuetobeusedforaboostregulatorusingtheLT3463(or
at least provides a good starting point). This value pro-
vides a good tradeoff in inductor size and system perfor-
mance. Pick a standard inductor close to this value. A
? V OUT + V D
? I LIM
?
?
larger value can be used to slightly increase the available
output current, but limit it to around twice the value
calculated below, as too large of an inductance will in-
crease the output voltage ripple without providing much
additional output current. A smaller value can be used
(especially for systems with output voltages greater than
12V) to give a smaller physical size. Inductance can be
calculated as:
where V D = 0.5V (Schottky diode voltage), I LIM = 250mA
(or 400mA) and t OFF = 300ns.
For higher output voltages, the formula above will give
large inductance values. For a 3V to 20V converter (typical
LCD bias application), a 49 μ H inductor is called for with
the above equation, but a 10 μ H or 22 μ H inductor could be
used without much reduction in the maximum output
L =
V OUT ? V IN ( MIN ) + V D
I LIM
t OFF
current.
Inductor Selection—Inverting Charge Pump Regulator
For the inverting regulator, the voltage seen by the internal
where V D = 0.5V (Schottky diode voltage), I LIM = 250mA
(or 400mA) and t OFF = 300ns; for designs with varying V IN
power switch is equal to the sum of the absolute value of
the input and output voltages, so that generating high
3463f
5
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LT3463AEDD#PBF | 功能描述:IC REG INV ADJ 0.25A DL 10DFN RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 开关稳压器 系列:- 标准包装:250 系列:- 类型:降压（降压） 输出类型:固定 输出数:1 输出电压:1.2V 输入电压:2.05 V ~ 6 V PWM 型:电压模式 频率 - 开关:2MHz 电流 - 输出:500mA 同步整流器:是 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:6-UFDFN 包装:带卷 (TR) 供应商设备封装:6-SON（1.45x1） 产品目录页面:1032 (CN2011-ZH PDF) 其它名称:296-25628-2 |
| LT3463AEDD#TR | 功能描述:IC REG INV ADJ 0.25A DL 10DFN RoHS:否 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 开关稳压器 系列:- 标准包装:2,500 系列:- 类型:升压（升压） 输出类型:可调式 输出数:1 输出电压:1.24 V ~ 30 V 输入电压:1.5 V ~ 12 V PWM 型:电流模式，混合 频率 - 开关:600kHz 电流 - 输出:500mA 同步整流器:无 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:8-SOIC（0.154"，3.90mm 宽） 包装:带卷 (TR) 供应商设备封装:8-SOIC |
| LT3463AEDD#TRPBF | 功能描述:IC REG INV ADJ 0.25A DL 10DFN RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 开关稳压器 系列:- 标准包装:2,500 系列:- 类型:升压（升压） 输出类型:可调式 输出数:1 输出电压:1.24 V ~ 30 V 输入电压:1.5 V ~ 12 V PWM 型:电流模式，混合 频率 - 开关:600kHz 电流 - 输出:500mA 同步整流器:无 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:8-SOIC（0.154"，3.90mm 宽） 包装:带卷 (TR) 供应商设备封装:8-SOIC |
| LT3463EDD | 功能描述:IC REG INV ADJ 0.25A DL 10DFN RoHS:否 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 开关稳压器 系列:- 标准包装:2,500 系列:- 类型:升压（升压） 输出类型:可调式 输出数:1 输出电压:1.24 V ~ 30 V 输入电压:1.5 V ~ 12 V PWM 型:电流模式，混合 频率 - 开关:600kHz 电流 - 输出:500mA 同步整流器:无 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:8-SOIC（0.154"，3.90mm 宽） 包装:带卷 (TR) 供应商设备封装:8-SOIC |
| LT3463EDD#PBF | 功能描述:IC REG INV ADJ 0.25A DL 10DFN RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 开关稳压器 系列:- 标准包装:250 系列:- 类型:降压（降压） 输出类型:固定 输出数:1 输出电压:1.2V 输入电压:2.05 V ~ 6 V PWM 型:电压模式 频率 - 开关:2MHz 电流 - 输出:500mA 同步整流器:是 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:6-UFDFN 包装:带卷 (TR) 供应商设备封装:6-SON（1.45x1） 产品目录页面:1032 (CN2011-ZH PDF) 其它名称:296-25628-2 |
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