参数资料
| 型号： | LT3027IDD#TRPBF |
| 厂商： | Linear Technology |
| 文件页数： | 10/16页 |
| 文件大小： | 0K |
| 描述： | IC REG LDO ADJ .1A 10-DFN |
| 产品培训模块： | More Information on LDOs |
| 标准包装： | 2,500 |
| 稳压器拓扑结构： | 正，可调式 |
| 输出电压： | 1.22 V ~ 20 V |
| 输入电压： | 1.8 V ~ 20 V |
| 电压 - 压降（标准）： | 0.3V @ 100mA |
| 稳压器数量： | 2 |
| 电流 - 输出： | 100mA |
| 电流 - 限制（最小）： | 110mA |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 10-WFDFN 裸露焊盘 |
| 供应商设备封装： | 10-DFN（3x3） |
| 包装： | 带卷 (TR) |
LT3027
APPLICATIO S I FOR ATIO
Output Capacitance and Transient Response
The LT3027 regulator is designed to be stable with a wide
range of output capacitors. The ESR of the output capaci-
tor affects stability, most notably with small
capacitors. A minimum output capacitor of 1 μ F with an
ESR of 3 ? or less is recommended to prevent oscilla-
tions. The LT3027 is a micropower device and output
transient response will be a function of output capaci-
tance. Larger values of output capacitance decrease the
peak deviations and provide improved transient response
for larger load current changes. Bypass capacitors, used
to decouple individual components powered by the
LT3027, will increase the effective output capacitor value.
With larger capacitors used to bypass the reference (for
low noise operation), larger values of output capacitors
are needed. For 100pF of bypass capacitance, 2.2 μ F of
output capacitor is recommended. With a 330pF bypass
capacitor or larger, a 3.3 μ F output capacitor is recom-
mended. The shaded region of Figure 2 defines the region
over which the LT3027 regulator is stable. The minimum
ESR needed is defined by the amount of bypass capaci-
tance used, while the maximum ESR is 3 ? .
When used with a 5V regulator, a 16V 10 μ F Y5V capacitor
can exhibit an effective value as low as 1 μ F to 2 μ F for the
DC bias voltage applied and over the operating tempera-
ture range. The X5R and X7R dielectrics result in more
stable characteristics and are more suitable for use as the
output capacitor. The X7R type has better stability across
temperature, while the X5R is less expensive and is
available in higher values. Care still must be exercised
when using X5R and X7R capacitors; the X5R and X7R
codes only specify operating temperature range and maxi-
mum capacitance change over temperature. Capacitance
change due to DC bias with X5R and X7R capacitors is
better than Y5V and Z5U capacitors, but can still be
significant enough to drop capacitor values below appro-
priate levels. Capacitor DC bias characteristics tend to
improve as component case size increases, but expected
capacitance at operating voltage should be verified.
20
BOTH CAPACITORS ARE 16V,
1210 CASE SIZE, 10 μ F
0
X5R
–20
–40
Extra consideration must be given to the use of ceramic
capacitors. Ceramic capacitors are manufactured with a
variety of dielectrics, each with different behavior across
temperature and applied voltage. The most common di-
–60
–80
Y5V
electrics used are specified with EIA temperature charac-
–100
0
2
4
6
8
10
12
14
16
teristic codes of Z5U, Y5V, X5R and X7R. The Z5U and Y5V
dielectrics are good for providing high capacitances in a
small package, but they tend to have strong voltage and
temperature coefficients as shown in Figures 3 and 4.
4.0
3.5
DC BIAS VOLTAGE (V)
3027 F03
Figure 3. Ceramic Capacitor DC Bias Characteristics
40
20
3.0
2.5
2.0
STABLE REGION
0
–20
–40
Y5V
X5R
1.5
C BYP = 0
C BYP = 100pF
–60
1.0
0.5
C BYP = 330pF
C BYP > 3300pF
–80
BOTH CAPACITORS ARE 16V,
1210 CASE SIZE, 10 μ F
–100
0
–50 –25
0
25
50
75
100
125
1
2 3 4 5 6 7 8 9 10
OUTPUT CAPACITANCE ( μ F)
TEMPERATURE ( ° C)
3027 F04
3027 F02
Figure 2. Stability
Figure 4. Ceramic Capacitor Temperature Characteristics
3027fa
10
相关PDF资料 |
PDF描述 |
|---|---|
| LT3028IDHC#TRPBF | IC REG LDO ADJ .5A/.1A 16-DFN |
| LT3029MPMSE#TRPBF | IC REG LDO ADJ .5A 16MSOP |
| LT3032MPDE-5#TRPBF | IC REG LDO +-5V .15A 14-DFN |
| LT3050MPMSE-5#TRPBF | IC REG LDO 5V .1A 12-MSOP |
| LT3060MPTS8-5#TRPBF | IC REG LDO 5V .1A TSOT23-8 |
相关代理商/技术参数 |
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| LT3027IMSE | 制造商:Linear Technology 功能描述:LDO Regulator Pos 1.22V to 20V1.22V to 20V 0.1A/0.1A 10-Pin MSOP EP |
| LT3027IMSE#PBF | 功能描述:IC REG LDO ADJ .1A 10-MSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - 线性 系列:- 产品培训模块:More Information on LDOs 标准包装:50 系列:- 稳压器拓扑结构:正，固定式 输出电压:3.3V 输入电压:最高 15V 电压 - 压降（标准）:1.1V @ 800mA 稳压器数量:1 电流 - 输出:800mA 电流 - 限制（最小）:800mA 工作温度:0°C ~ 125°C 安装类型:表面贴装 封装/外壳:TO-263-4，D²Pak（3 引线+接片），TO-263AA 供应商设备封装:D2PAK-3 包装:管件 |
| LT3027IMSE#TRPBF | 功能描述:IC REG LDO ADJ .1A 10-MSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - 线性 系列:- 产品培训模块:More Information on LDOs 标准包装:50 系列:- 稳压器拓扑结构:正，固定式 输出电压:3.3V 输入电压:最高 15V 电压 - 压降（标准）:1.1V @ 800mA 稳压器数量:1 电流 - 输出:800mA 电流 - 限制（最小）:800mA 工作温度:0°C ~ 125°C 安装类型:表面贴装 封装/外壳:TO-263-4，D²Pak（3 引线+接片），TO-263AA 供应商设备封装:D2PAK-3 包装:管件 |
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| LT3028EDHC | 制造商:LINER 制造商全称:Linear Technology 功能描述:Dual 100mA/500mA Low Dropout, Low Noise,Micropower Regulators with Independent Inputs |
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