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参数资料
| 型号： | TS1581 |
| 厂商： | Taiwan Semiconductor Co., Ltd. |
| 元件分类： | 基准电压源/电流源 |
| 英文描述： | 5.0 AMP POSITIVE VOLTAGE REGULATOR |
| 中文描述： | 5.0放大器正电压稳压器 |
| 文件页数： | 5/7页 |
| 文件大小： | 135K |
| 代理商： | TS1581 |
TS1581 series
5-5
2003/12 rev. B
Application Information (continued)
The effect on output regulation can be seen in trace B
of Figure 3. It is important to note that the voltage drops
due to Rp are not eliminated; they will add to the
dropout voltage of the regulator regardless. The
TS1581 can control the voltage at the load as long as
the input-output voltage is greater than the total of the
dropout voltage of the device plus the voltage drop
across Rp
Figure 3. Remote Sensing Improves Load Regulation
Stability
The circuit design used in the TS1581 Series requires
the use of an output capacitor as part of the device
frequency compensation. The addition of 150uF
aluminum electrolytic or a 22uF solid tantalum on the
output will ensure stability for all operating conditions.
In order to meet the transient performance of the
processor larger value capacitors are needed. To limit
the high frequency noise generated by the processor
high quality bypass capacitors must be used. In order
to limit parasitic inductance (ESL) and resistance
(ESR) in capacitors to acceptable limits, multiple small
ceramic capacitors in addition to high quality solid
tantalum capacitors are required.
When the adjustment terminal is bypass to improve the
ripple rejection, the requirement for an output capacitor
increases. The Adjust pin is brought out on the fixed
voltage device specifically to allow this capability. To
further improve stability and transient response of
these devices larger values of output capacitor can be
used. The modern processors generate large high
frequency current transients. The load current step
contains higher order frequency components than the
output coupling network must handle until the regulator
throttles to the load current level.
Because they contain parasitic resistance and
inductance, capacitors are not ideal elements. These
parasitic elements dominate the change in output
voltage as the beginning of a transient load step
change. The ESR of the output capacitors produces
and instantaneous step in output voltage
V =
I (ESR). The ESL of the output capacitors
produces a drop proportional to the rate of change of
the output current V = L (
I /
t). the output
capacitance produces a change in output voltage
proportional to the time until the regulator can respond
V =
t (
I / C).
Figure 4. illustrates there transient effects.
Output voltage
The TS1581 (adjustable version) develops a 1.25V
reference voltage between the Sense Pin and the
Adjust Pin (Figure 5). Placing a resistor between these
two terminals causes a constant current to flow though
R1 and down though R2 to set the output voltage. In
general R1 is chosen so that this current is the
specified minimum load current of 10mA. The current
out of the Adjust pin is small, typically 50uA and it adds
to the current from R1.For best regulation the top of the
resistor divider should be connected directly to the
Sense pin.
Figure 5. Setting Output Voltage
相关PDF资料 |
PDF描述 |
|---|---|
| TS1581CM5 | 5.0 AMP POSITIVE VOLTAGE REGULATOR |
| TS1581CM525 | D-Subminiature Connector; Gender:Female; Number of Contacts:9; Contact Termination:Crimp; Body Material:Steel; Contact Plating:Gold |
| TS1581CM533 | 5.0 AMP POSITIVE VOLTAGE REGULATOR |
| TS1581CZ533 | 5.0 AMP POSITIVE VOLTAGE REGULATOR |
| TS1581CM52.5 | 5.0 AMP POSITIVE VOLTAGE REGULATOR |
相关代理商/技术参数 |
参数描述 |
|---|---|
| TS1581_07 | 制造商:TSC 制造商全称:Taiwan Semiconductor Company, Ltd 功能描述:5A Dual Input LDO |
| TS1581CM5 | 功能描述:低压差稳压器 - LDO 5A Dual Input LDO Adj Vltg Reg RoHS:否 制造商:Texas Instruments 最大输入电压:36 V 输出电压:1.4 V to 20.5 V 回动电压（最大值）:307 mV 输出电流:1 A 负载调节:0.3 % 输出端数量: 输出类型:Fixed 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-20 |
| TS1581CM5 RN | 制造商:SKMI/Taiwan 功能描述:5A DUAL INPUT LOW DROPOUT VOLTAGE REGULATOR |
| TS1581CM52.5 | 制造商:TSC 制造商全称:Taiwan Semiconductor Company, Ltd 功能描述:5A Dual Input Low Dropout Positive Voltage Regulator |
| TS1581CM525 | 制造商:TSC 制造商全称:Taiwan Semiconductor Company, Ltd 功能描述:5A Dual Input Low Dropout Positive Voltage Regulator |
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