参数资料
| 型号： | SC195ULTRT |
| 厂商： | Semtech |
| 文件页数： | 15/20页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK SYNC ADJ 0.5A 8MLPQ |
| 特色产品： | SC195 Buck Regulator |
| 标准包装： | 1 |
| 类型： | 降压（降压） |
| 输出类型： | 可调式 |
| 输出数： | 1 |
| 输出电压： | 0.8 V ~ 3.3 V |
| 输入电压： | 2.9 V ~ 5.5 V |
| PWM 型： | 电压模式 |
| 频率 - 开关： | 3.5MHz |
| 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： | 8-MLPQ |
| 包装： | 标准包装 |
| 供应商设备封装： | 8-MLPQ-UT（1.5x1.5） |
| 产品目录页面： | 1357 (CN2011-ZH PDF) |
| 其它名称： | SC195ULDKR |
SC195
Applications Information (continued)
Manufacturer
L
DCR
(μH)
(?)
(mA)
(μH)
(mm)
pole output filter corner frequency defined by the
equation
where L = 1μH and C OUT = 10μF.
When selecting output filter components, the LC product
should not vary over a wide range. Selection of smaller
inductor and capacitor values will move the corner fre-
quency, potentially impacting system stability.
It is also important to consider the change in inductance
with DC bias current when choosing an inductor. The
inductor saturation current is specified as the current at
which the inductance drops a specific percentage from
the nominal value (approximately 30%). Except for short-
circuit or other fault conditions, the peak current must
always be less than the saturation current specified by the
manufacturer. The peak current is the maximum load
current plus one half of the inductor ripple current at the
maximum input voltage. Load and/or line transients can
cause the peak current to exceed this level for short dura-
tions. Maintaining the peak current below the inductor
saturation specification keeps the inductor ripple current
the ripple component of the inductor is a small percent-
age of the DC load. AC losses in the inductor core and
winding do not contribute significantly to the total
losses.
Magnetic fields associated with the output inductor can
interfere with nearby circuitry. This can be minimized by
the use of low-noise shielded inductors which use the
minimum gap possible to limit the distance that magnetic
fields can radiate from the inductor. Shielded inductors,
however, typically have a higher DCR and are, therefore,
less efficient than a similar sized non-shielded inductor.
Final inductor selection depends on various design con-
siderations such as efficiency, EMI, size, and cost. Table 2
lists the manufacturers of recommended inductor options.
The inductors with larger packages tend to provide better
overall efficiency, while the smaller package inductors
provide decent efficiency with reduced footprint or height.
The saturation current ratings and DC characteristics are
also shown.
Table 2 — Recommended Inductors
Saturation L at Dimensions
Current 400mA LxWxH
Part Number
and the output voltage ripple at acceptable levels.
Manufacturers often provide graphs of actual inductance
and saturation characteristics versus applied inductor
current. The saturation characteristics of the inductor can
vary significantly with core temperature. Core and
ambient temperatures should be considered when exam-
ining the core saturation characteristics.
When the inductor value has been determined, the DC
resistance (DCR) must be examined. Efficiency can be
optimized by lowering the inductor’s DCR as much as pos-
sible. Low DCR in an inductor requires either more surface
area for the increased wire diameter or fewer turns to
reduce the length of the copper winding. Fewer turns
requires an inductor core with a larger cross-sectional area
in order to maintain the same saturation characteristics.
Murata
LQM21PN1R0MC0
Murata
LQM2HPN1R0MJ0
Murata
LQM31PN1R0M00
Taiyo Yuden
CKP25201R0M-T
Toko
MDT2012-CR1R0N
FDK
MIPSZ2012D1R0
FDK
MIPSU2520D1R0
FDK
MIPSA2520D1R0
Taiyo Yuden
BRC1608T1R0M
1.0±20%
1.0±20%
1.0±20%
1.0±20%
1.0±30%
1.0±30%
1.0±30%
1.3±30%
1.0±20%
0.19
0.09
0.12
0.08
0.08
0.09
0.08
0.09
0.18
800
1500
1200
800
1350
1100
1300
1200
850
0.75
0.95
0.95
0.88
1.00
1.00
0.78
1.20
0.90
2.0x1.25x0.55
2.5x2.0x1.1
3.2x1.6x0.85
2.5x2.0x1.0
2.0x1.25x1.0
2.0x1.25x1.0
2.5x2.0x0.5
2.5x2.0x1.2
1.6x0.8x0.8
The inductor size must always be considered when exam-
ining the inductor DCR to determine the best compromise
between DCR and component area on a PCB. Note that
15
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相关代理商/技术参数 |
参数描述 |
|---|---|
| SC196 | 制造商:SEMTECH 制造商全称:Semtech Corporation 功能描述:1.5A Synchronous Buck Converter with Integrated Power Devices |
| SC1968 | 制造商:MITSUBISHI 制造商全称:Mitsubishi Electric Semiconductor 功能描述:NPN EPITAXIAL PLANAR TYPE |
| SC196A | 制造商:SEMTECH 制造商全称:Semtech Corporation 功能描述:1.5A Synchronous Buck Converter with Integrated Power Devices |
| SC196A_08 | 制造商:SEMTECH 制造商全称:Semtech Corporation 功能描述:1.5A Synchronous Buck Converter with Integrated Power Devices |
| SC196AEVB | 制造商:SEMTECH 制造商全称:Semtech Corporation 功能描述:1.5A Synchronous Buck Converter with Integrated Power Devices |
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