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| 型号： | TS317LCS |
| 厂商： | Taiwan Semiconductor Co., Ltd. |
| 英文描述： | CONNECTOR ACCESSORY |
| 中文描述： | 连接器附件 |
| 文件页数： | 4/6页 |
| 文件大小： | 311K |
| 代理商： | TS317LCS |
Application Information (continued)
decrease in capacitance at frequencies around
0.5MHz. for this reason, a 0.01uF disc may seem to
work better than a 0.1uF disc as a bypass.
Although the TS317L is stable with no output
capacitance, like any feedback circuit, certain values of
external capacitance can cause excessive ringing. This
occurs with values between 50pF and 5000pF. A 1u
μ
F
solid tantalum (or 25uF aluminum electrolytic) on the
output swamps this effect and insures stability.
Thermal Regulation
When power is dissipated in an IC, a temperature
gradient occurs across the IC chip affecting the
individual IC circuit components. With an IC regulator,
this gradient can be especially severe since power
dissipation is large. Thermal regulation is the effect of
these temperature gradients on output voltage (in
percentage output change) per watt of power change in
a specified time. Thermal regulation error is
independent of electrical regulation of temperature
coefficient, and occurs within 5ms to 50ms after a
change in power dissipation. Thermal regulation
depends on IC layout as well as electrical design. The
thermal regulation of a voltage regulator is defined as
the percentage change of Vout, per watt, within the first
10ms after a step of power is applied. The TS317L
specification is 0.2%/W, maximum.
TS317L’s output changes only 7mV (or 0.07% of Vout=
-10V) when a 1W pulse is applied for 10ms. This
performance is thus well inside the specification limit of
0.2%/W x 1W = 0.2% maximum. When the 1W pulse is
ended, the thermal regulation again shows a 7mV
change as the gradients across the TS317L chip die
out. Note that the load regulation error of about 14mV
(0.14%) is additional to the thermal regulation error.
Protection Diode
When external capacitors are used with any I.C.
regulator it is sometimes necessary to add protection
diodes to prevent the capacitors from discharging
through low current points into the regulator. Most
10uF capacitors have low enough internal series
resistance to deliver 20A spikes when shorted.
Although the surge is short, these is enough energy to
damage parts of the IC.
When an output capacitor is connected to a regulator
and the input is shorted, the output capacitor will
Discharge into the output of the regulator. The
discharge current depends on the value of the
capacitor, the output voltage of the regulator, and the
rate of decrease of Vin. In the TS317L, this discharge
path is through a large junction that is able to sustain a
2A surge with no problem. this is not true of other types
of positive regulators. For output capacitors of 25uF or
less, the TS317L’s ballast resistors and output
structure limit the peak current to a low enough level so
that there is no need to use a protection diode.
The bypass capacitor on the adjustment terminal can
discharge through a low current junction. Discharge
occurs when either the input or output is shorted.
Internal to the TS317L is a 50
resistor which limits the
peak discharge current. No protection is needed for
output voltages of 25V or less and 10uF capacitance.
Figure 3 shows an TS317L with protection diodes
included for use with outputs greater than 25V and high
values of output capacitance.
F
igure 3. regulator with protection diode
TS317L
4-6
2003/12 rev. A
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| TS317LCT | 5.0 AMP POSITIVE VOLTAGE REGULATOR |
| TS321AIYLT | Low Power Single Operational Amplifier |
| TS321IYLT | Low Power Single Operational Amplifier |
| TS324CD | Quad Operating Amplifier |
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相关代理商/技术参数 |
参数描述 |
|---|---|
| TS317LCS RL | 制造商:SKMI/Taiwan 功能描述:Standard Regulator Pos 1.25V to 37V 0.2A 8-Pin SOP T/R 制造商:Taiwan Semiconductor 功能描述:Standard Regulator Pos 1.25V to 37V 0.2A 8-Pin SOP T/R |
| TS317LCSRL | 制造商:TSC 制造商全称:Taiwan Semiconductor Company, Ltd 功能描述:3-Terminal Adjustable Positive Voltage Regulator |
| TS317LCT | 功能描述:线性稳压器 - 标准 Adjustable RoHS:否 制造商:STMicroelectronics 输出类型: 极性: 输出电压:1.8 V 输出电流:150 mA 负载调节: 最大输入电压:5.5 V 线路调整率: 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:SOT-323-5L |
| TS317LCT A3 | 制造商:SKMI/Taiwan 功能描述:Standard Regulator Pos 1.25V to 37V 0.2A 3-Pin TO-92 Ammo |
| TS317LCTA3 | 制造商:TSC 制造商全称:Taiwan Semiconductor Company, Ltd 功能描述:3-Terminal Adjustable Positive Voltage Regulator |
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