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参数资料
| 型号： | LT3092IDD#PBF |
| 厂商： | Linear Technology |
| 文件页数： | 11/22页 |
| 文件大小： | 249K |
| 描述： | IC PROG CURRENT SOURCE 8DFN |
| 标准包装： | 121 |
| 功能： | 电流源 |
| 精确度： | ±1% |
| 输入电压： | 1.2 V ~ 40 V |
| 电流 - 输出： | 200mA |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-WFDFN 裸露焊盘 |
| 供应商设备封装： | 8-DFN-EP（3x3） |
| 包装： | 管件 |
LT3092
11
3092fb
APPLICATIONS INFORMATION
capacitor on the lower impedance output, and the same
restrictions do not apply. Capacitors in the range of 0.1糉
to 1糉 usually provide suf cient bypassing on the input,
and the value of input capacitance may be increased
without limit.
If an application uses GND referred capacitors on the input
or output (particularly the input), pay attention to the length
of the lines powering and returning ground from the circuit.
In the case where long power supply and return lines are
coupled with low ESR input capacitors, application-speci c
voltage spikes, oscillations and reliability concerns may
be seen. This is not an issue with LT3092 stability, but
rather the low ESR capacitor forming a high-Q resonant
tank circuit with the inductance of the input wires. Adding
series resistance with the input of the LT3092, or with the
input capacitor, often solves this. Resistor values of 0.1?
to 1?are often suf cient to dampen this resonance.
Give extra consideration to the use of ceramic capacitors.
Ceramic capacitors are manufactured with a variety of di-
electrics, each with different behavior across temperature
and applied voltage. The most common dielectrics used
are speci ed with EIA temperature characteristic 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
coef cients as shown in Figures 5 and 6. When used with
a 5V regulator, a 16V 10糉 Y5V capacitor can exhibit an
effective value as low as 1糉 to 2糉 for the DC bias voltage
applied and 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. Care still must be exercised when using X5R and
X7R capacitors; the X5R and X7R codes only specify
operating temperature range and maximum 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 signi cant enough to drop
capacitor values below appropriate levels. Capacitor DC
bias characteristics tend to improve as component case
size increases, but expected capacitance at operating
voltage should be veri ed.
Voltage and temperature coef cients 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. In a
ceramic capacitor the stress can be induced by vibrations
in the system or thermal transients.
DC BIAS VOLTAGE (V)
3092 F05
20
0
20
40
60
80
100
0
4
8 10
2
6
12 14
X5R
Y5V
16
BOTH CAPACITORS ARE 16V,
1210 CASE SIZE, 10糉
Figure 5. Ceramic Capacitor DC Bias Characteristics
TEMPERATURE (癈)
50
40
20
0
20
40
60
80
100
25
75
3092 F06
25 0
50
100 125
Y5V
X5R
BOTH CAPACITORS ARE 16V,
1210 CASE SIZE, 10糉
Figure 6. Ceramic Capacitor Temperature Characteristics
相关PDF资料 |
PDF描述 |
|---|---|
| LT3092EST#TRPBF | IC PROG CURRENT SOURCE SOT223-3 |
| AD8210YRZ-REEL | IC CURRENT MONITOR 0.5% 8SOIC |
| AD8212WYRMZ-RL | IC CURRENT MONITOR 8MSOP |
| LT3092EDD#TRPBF | IC PROG CURRENT SOURCE 8DFN |
| LT3092ETS8#TRPBF | IC PROG CURRENT SOURCE TSOT23-8 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| LT3092IDDTR | 制造商:LINER 制造商全称:Linear Technology 功能描述:200mA 2-Terminal Programmable Current Source |
| LT3092IDDTRPBF | 制造商:LINER 制造商全称:Linear Technology 功能描述:200mA 2-Terminal Programmable Current Source |
| LT3092IST | 制造商:LINER 制造商全称:Linear Technology 功能描述:200mA 2-Terminal Programmable Current Source |
| LT3092IST#PBF | 功能描述:IC PROG CUR SOURCE SOT223 RoHS:是 类别:集成电路 (IC) >> PMIC - 稳流/电流管理 系列:* 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:50 系列:- 功能:电流开关 检测方法:- 精确度:±10% 输入电压:1.7 V ~ 5.5 V 电流 - 输出:600mA 工作温度:-40°C ~ 125°C 安装类型:表面贴装 封装/外壳:10-UFQFN 供应商设备封装:10-UTQFN（1.4x1.8） 包装:管件 |
| LT3092IST#PBF | 制造商:Linear Technology 功能描述:PROGRAMMABLE CURRENT SOURCE S 制造商:Linear Technology 功能描述:PROGRAMMABLE CURRENT SOURCE, SOT-223-3 |
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