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| 型号： | LT1764AET-2.5#06PBF |
| 厂商： | Linear Technology |
| 文件页数： | 14/20页 |
| 文件大小： | 0K |
| 描述： | IC REG LDO 2.5V 3A TO220-5 |
| 标准包装： | 50 |
| 稳压器拓扑结构： | 正，固定式 |
| 输出电压： | 2.5V |
| 输入电压： | 最高 20V |
| 电压 - 压降（标准）： | 0.34V @ 3A |
| 稳压器数量： | 1 |
| 电流 - 输出： | 3A |
| 电流 - 限制（最小）： | 3.1A |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 通孔 |
| 封装/外壳： | TO-220-5 |
| 供应商设备封装： | TO-220-5 |
| 包装： | 管件 |
LT1764A Series
APPLICATIO N S I N FOR M ATIO N
Ceramic Capacitors
Extra consideration must be given to the use of ceramic
capacitors. Ceramic capacitors are manufactured with a
variety of dielectrics, each with different behavior over
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 capacitances
in a small package, but exhibit strong voltage and tem-
perature coefficients as shown in Figures 3 and 4. 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.
Table 2. PC Trace Resistors
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.
“FREE” Resistance with PC Traces
The resistance values shown in Table 1 can easily be made
using a small section of PC trace in series with the output
capacitor. The wide range of noncritical ESR makes it easy
to use PC trace. The trace width should be sized to handle
the RMS ripple current associated with the load. The
output capacitor only sources or sinks current for a few
microseconds during fast output current transitions. There
10m ?
20m ?
30m ?
0.5oz C U
1.0oz C U
2.0oz C U
Width
Length
Width
Length
Width
Length
0.011 " (0.28mm)
0.102 " (2.6mm)
0.006 " (0.15mm)
0.110 " (2.8mm)
0.006 " (0.15mm)
0.224 " (5.7mm)
0.011 " (0.28mm)
0.204 " (5.2mm)
0.006 " (0.15mm)
0.220 " (5.6mm)
0.006 " (0.15mm)
0.450 " (11.4mm)
0.011 " (0.28mm)
0.307 " (7.8mm)
0.006 " (0.15mm)
0.330 " (8.4mm)
0.006 " (0.15mm)
0.670 " (17mm)
20
0
BOTH CAPACITORS ARE 16V,
1210 CASE SIZE, 10 μ F
40
20
X5R
0
X5R
–20
–20
–40
–40
Y5V
–60
Y5V
–60
–80
–80
BOTH CAPACITORS ARE 16V,
1210 CASE SIZE, 10 μ F
–100
0
2
4
6
8
10
12
14
16
–100
–50 –25
0
25
50
75
100
125
DC BIAS VOLTAGE (V)
1764 F10
TEMPERATURE ( ° C)
1764 F11
Figure 3. Ceramic Capacitor DC Bias Characteristics
Figure 4. Ceramic Capacitor Temperature Characteristics
1764afb
14
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LT1764AET-3.3 | 功能描述:IC REG LDO 3.3V 3A TO220-5 RoHS:否 类别:集成电路 (IC) >> PMIC - 稳压器 - 线性 系列:- 标准包装:1 系列:- 稳压器拓扑结构:正，固定式 输出电压:3V 输入电压:2.3 V ~ 5.5 V 电压 - 压降（标准）:0.035V @ 150mA 稳压器数量:2 电流 - 输出:150mA 电流 - 限制（最小）:300mA 工作温度:-40°C ~ 125°C 安装类型:表面贴装 封装/外壳:6-UFDFN 裸露焊盘，6-TMLF? 供应商设备封装:6-TMLF?（1.6x1.6） 包装:Digi-Reel® 产品目录页面:1104 (CN2011-ZH PDF) 其它名称:576-3018-6 |
| LT1764AET-3.3#06PBF | 功能描述:IC REG LDO 3.3V 3A TO220-5 RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - 线性 系列:- 标准包装:1 系列:- 稳压器拓扑结构:正，固定式 输出电压:3V 输入电压:2.3 V ~ 5.5 V 电压 - 压降（标准）:0.035V @ 150mA 稳压器数量:2 电流 - 输出:150mA 电流 - 限制（最小）:300mA 工作温度:-40°C ~ 125°C 安装类型:表面贴装 封装/外壳:6-UFDFN 裸露焊盘，6-TMLF? 供应商设备封装:6-TMLF?（1.6x1.6） 包装:Digi-Reel® 产品目录页面:1104 (CN2011-ZH PDF) 其它名称:576-3018-6 |
| LT1764AET-3.3#PBF | 功能描述:IC REG LDO 3.3V 3A TO220-5 RoHS:否 类别:集成电路 (IC) >> PMIC - 稳压器 - 线性 系列:- 标准包装:1 系列:- 稳压器拓扑结构:正，固定式 输出电压:8V 输入电压:10.5 V ~ 23 V 电压 - 压降（标准）:1.7V @ 40mA 稳压器数量:1 电流 - 输出:100mA（最小值） 电流 - 限制（最小）:- 工作温度:0°C ~ 125°C 安装类型:表面贴装 封装/外壳:8-SOIC（0.154"，3.90mm 宽） 供应商设备封装:8-SOIC 包装:剪切带 (CT) 产品目录页面:1075 (CN2011-ZH PDF) 其它名称:296-24390-1 |
| LT1764AETPBF | 制造商:Linear Technology 功能描述:LDO Regulator Pos 1.21-20V 3A TO220-5 |
| LT1764AMPQ | 制造商:Linear Technology 功能描述:LDO Regulator Pos 1.21V to 20V 3A 6-Pin(5+Tab) DDPAK |
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