参数资料
| 型号： | LT3029MPMSE#PBF |
| 厂商： | Linear Technology |
| 文件页数： | 13/20页 |
| 文件大小： | 0K |
| 描述： | IC REG LDO ADJ .5A 16MSOP |
| 产品培训模块： | LT3029 - 500mA, Dual Output, 1.2 ~ 19.5V, Linear Regulator |
| 标准包装： | 37 |
| 稳压器拓扑结构： | 正，可调式 |
| 输出电压： | 1.215 V ~ 19.5 V |
| 输入电压： | 1.8 V ~ 20 V |
| 电压 - 压降（标准）： | 0.3V @ 500mA |
| 稳压器数量： | 2 |
| 电流 - 输出： | 500mA |
| 电流 - 限制（最小）： | 520mA |
| 工作温度： | -55°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 16-TFSOP（0.118"，3.00mm 宽）裸露焊盘 |
| 供应商设备封装： | 16-MSOP，裸露焊盘 |
| 包装： | 管件 |
| 产品目录页面： | 1330 (CN2011-ZH PDF) |
LT3029
APPLICATIONS INFORMATION
Bypass Capacitance and Low Noise Performance
Using a bypass capacitor connected between a channel’s
BYP pin and its corresponding OUT pin signi?cantly low-
ers LT3029 output voltage noise, but is not required in
all applications. Linear Technology recommends a good
quality low leakage capacitor. This capacitor bypasses
the regulator’s reference, providing a low frequency noise
pole. A 10nF bypass capacitor introduces a noise pole that
decreases output voltage noise to as low as 20μV RMS .
voltage and temperature coef?cients, as shown in Figures
2 and 3. When used with a 5V regulator, a 16V 10μF Y5V
capacitor can exhibit an effective value as low as 1μF to
2μF for the applied DC bias voltage and over the operat-
ing temperature range. 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.
Using a bypass capacitor provides the added bene?t of
improving transient response. With no bypass capacitor,
and a 10μF output capacitor, a 100mA to 500mA load step
settles to within 1% of its ?nal value in approximately
100μs. With the addition of a 10nF bypass capacitor and
evaluating the same load step, output voltage excursion
stays within 1% (see Transient Response in the Typical
Performance Characteristics section). Using a bypass
capacitor makes regulator start-up time proportional to
20
0
–20
–40
–60
–80
BOTH CAPACITORS ARE 16V,
1210 CASE SIZE, 10μF
X5R
Y5V
the value of the bypass capacitor. For example, a 10nF
bypass capacitor and 10μF output capacitor slow start-up
–100
0
2
4
6 8 10 12
DC BIAS VOLTAGE (V)
14
16
3029 F02
time to 15ms.
Output Capacitance and Transient Response
The LT3029 design is stable with a wide range of output
capacitors. The ESR of the output capacitor affects stabil-
Figure 2. Ceramic Capacitor DC Bias Characteristics
40
20
ity, most notably with small capacitors. Linear Technology
recommends a minimum output capacitor of 3.3μF with
an ESR of 3Ω, or less, to prevent oscillations. The LT3029
is a micropower device, and output transient response is
a function of output capacitance. Larger values of output
0
–20
–40
–60
Y5V
X5R
capacitance decrease the peak deviations and provide
improved transient response for larger load current
changes.
–80
–100
BOTH CAPACITORS ARE 16V,
1210 CASE SIZE, 10μF
–50 –25 0 25 50
75
100
125
Ceramic capacitors require extra consideration. Manufac-
TEMPERATURE (°C)
3029 F03
turers make ceramic capacitors with a variety of dielectrics,
Figure 3. Ceramic Capacitor Temperature Characteristics
each with different behavior across temperature and
applied voltage. The most common dielectrics specify
the EIA temperature characteristic codes of Z5U, Y5V,
X5R and X7R. Z5U and Y5V dielectrics provide high C-V
products in a small package at low cost, but exhibit strong
3029fa
13
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LT3029MPMSETRPBF | 制造商:LINER 制造商全称:Linear Technology 功能描述:Dual 500mA/500mA Low Dropout, Low Noise, Micropower Linear Regulator |
| LT3029MPMSTR | 制造商:LINER 制造商全称:Linear Technology 功能描述:Dual 500mA/500mA Low Dropout, Low Noise, Micropower Linear Regulator |
| LT302-SERIES | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Optoelectronic |
| LT302XX-SERIES | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Optoelectronic |
| LT3030 | 制造商:LINER 制造商全称:Linear Technology 功能描述:Dual 750mA/250mA Low Dropout, Low Noise, Micropower Linear Regulator |
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