参数资料
| 型号： | LT1962EMS8-5#PBF |
| 厂商： | Linear Technology |
| 文件页数： | 13/16页 |
| 文件大小： | 0K |
| 描述： | IC REG LDO 5V .3A 8-MSOP |
| 产品培训模块： | More Information on LDOs |
| 标准包装： | 50 |
| 稳压器拓扑结构： | 正，固定式 |
| 输出电压： | 5V |
| 输入电压： | 最高 20V |
| 电压 - 压降（标准）： | 0.27V @ 300mA |
| 稳压器数量： | 1 |
| 电流 - 输出： | 300mA |
| 电流 - 限制（最小）： | 320mA |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-TSSOP，8-MSOP（0.118"，3.00mm 宽） |
| 供应商设备封装： | 8-MSOP |
| 包装： | 管件 |
| 产品目录页面： | 1329 (CN2011-ZH PDF) |
| 配用： | DC1075A-ND - BOARD COMPANION |
LT1962 Series
APPLICATIO S I FOR ATIO
temperature and applied voltage. The most common
dielectrics used are Z5U, Y5V, X5R and X7R. The Z5U and
Y5V dielectrics are good for providing high capacitance in
a small package, but exhibit strong voltage and tempera-
ture coefficients as shown in Figures 4 and 5. When used
with a 5V regulator, a 10 μ F Y5V capacitor can exhibit an
effective value as low as 1 μ F to 2 μ F over the operating
temperature 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.
Voltage and temperature coefficients are not the only
sources of problems. Some ceramic capacitors have a
piezoelectric response. A piezoelectric device generates
voltage across its terminals due to mechanical stress,
similar to the way a piezoelectric accelerometer or micro-
phone works. For a ceramic capacitor the stress can be
induced by vibrations in the system or thermal transients.
The resulting voltages produced can cause appreciable
amounts of noise, especially when a ceramic capacitor is
used for noise bypassing. A ceramic capacitor produced
Figure 6’s trace in response to light tapping from a pencil.
Similar vibration induced behavior can masquerade as
increased output voltage noise.
LT1962-5
C OUT = 10 μ F
C BYP = 0.01 μ f
I LOAD = 100mA
V OUT
500 μ V/DIV
20
BOTH CAPACITORS ARE 16V,
1210 CASE SIZE, 10 μ F
100ms/DIV
1962 F06
0
–20
–40
X5R
Figure 6. Noise Resulting from Tapping on a Ceramic Capacitor
Thermal Considerations
–60
–80
Y5V
The power handling capability of the device will be limited
by the maximum rated junction temperature (125 ° C). The
power dissipated by the device will be made up of two
–100
0
2
4
6 8 10 12
DC BIAS VOLTAGE (V)
14
16
components:
1. Output current multiplied by the input/output voltage
1962 F04
Figure 4. Ceramic Capacitor DC Bias Characteristics
40
20
differential: (I OUT )(V IN – V OUT ), and
2. GND pin current multiplied by the input voltage:
(I GND )(V IN ).
The GND pin current can be found by examining the GND
Pin Current curves in the Typical Performance Character-
0
–20
–40
–60
–80
Y5V
BOTH CAPACITORS ARE 16V,
1210 CASE SIZE, 10 μ F
X5R
istics. Power dissipation will be equal to the sum of the two
components listed above.
The LT1962 series regulators have internal thermal limit-
ing designed to protect the device during overload condi-
tions. For continuous normal conditions, the maximum
junction temperature rating of 125 ° C must not be
–100
–50 –25
0 25 50 75
TEMPERATURE ( ° C)
100
125
exceeded. It is important to give careful consideration to
all sources of thermal resistance from junction to ambient.
1962 F05
Figure 5. Ceramic Capacitor Temperature Characteristics
Additional heat sources mounted nearby must also be
considered.
13
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LT1962EMS8PBF | 制造商:Linear Technology 功能描述: 制造商:Linear Technology 功能描述:LDO Regulator Adj. 300mA Low Noise MSOP8 |
| LT1963 | 制造商:LINER 制造商全称:Linear Technology 功能描述:1.5A, Low Noise, Fast Transient Response LDO Regulators |
| LT1963/ | 制造商:LINER 制造商全称:Linear Technology 功能描述:45V VIN, Micropower, Low Noise, 100mA Low Dropout, Linear Regulator |
| LT1963A | 制造商:LINER 制造商全称:Linear Technology 功能描述:1.1A, Low Noise, Low Dropout Linear Regulator |
| LT1963A_1208 | 制造商:LINER 制造商全称:Linear Technology 功能描述:1.5A Low Noise Fast Transient Response LDO Regulators |
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