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参数资料
| 型号： | TS1581CZ52.5 |
| 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： | 4/7页 |
| 文件大小： | 135K |
| 代理商： | TS1581CZ52.5 |
TS1581 series
4-4
2003/12 rev. B
Application Information
Application
The TS1581 is a low dropout regulator designed to
make used of multiple power supplies, present in most
systems, to reduce the dropout voltage. One of the
advantages of the two supply approach is maximizing
the efficiency. The second supply is at least 1V greater
than output voltage and is providing the power for the
control circuitry and supplies the drive current to the
NPN output transistor. This allows the NPN output
transistor to be driven into saturation. For the control
voltage the current requirement is small equal to about
1% of the output current or approximately 50mA for a
5A load. This drive current becomes part of the output
current. The maximum voltage on the Control Pin is
15V. The maximum voltage at the Power in is 7V.By
tying the control and power inputs together the TS1581
can also be operated as a single supply device. In
single supply operation the dropout will be determined
by the minimum control voltage.
Both the fixed and adjustable versions have remote
sense pins, permitting very accurate regulation of
output voltage. As a result, over and output current
range of 100mA to 5A, the typical load regulation is
less than 1mV. For the fixed voltages the adjust pin is
brought out allowing the user to improve transient
response by bypassing the internal resistor divider.
Optimum transient response is provided using a
capacitor in the range of 0.1uF to 1uF for bypassing the
adjust pin.
The new generation of microprocessors cycle load
current from several hundred million amperes to
several amperes in tens of nanoseconds. Output
voltage tolerances are tighter and include transient
response as part of the specification. Designed to meet
the fast current load step requirements of these
microprocessors, the TS1581 also saves total cost by
needing less output capacitance to maintain regulation.
Typical applications for the TS1581 include 3.3V to
2.5V conversion with a 5V control supply, 5V to 4.2V
conversion with a 12V control supply or 5V to 3.6V
conversion with a 12V control supply. It is easy to
obtain dropout voltages less than 0.5V at 1.5A along
with excellent static and dynamic specifications. It is
fully protected against over current and over
temperature conditions.
Grounding and Output Sensing
The TS1581 allows true Kelvin sensing for both the
high & low side of the load. A result the voltage
regulation at the load can be easily optimized. Voltage
drops due to parasitic resistances between the
regulator and the load can be placed inside the
regulation loop. The advantages of remote sensing are
illustrated in Figure 1 through 3.
Figure 1 show the device connected as a conventional
3 terminal regulator with the Sense lead connected
directly to the output of the device. Rp is the parasitic
resistance of the connections between the device and
the load. Trace A of Figure 3 illustrates the effect of Rp
Figure 1. Conventional Load Sensing
Figure 2 show the device connected to take advantage
of the remote sense feature. The Sense Pin and the
top of the resistor divider are connected to the top of
the load; the bottom of the resistor divider is connected
to the bottom of the load.
Figure 2. Remote Load Sensing
相关PDF资料 |
PDF描述 |
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| TS1581CZ5 | 5.0 AMP POSITIVE VOLTAGE REGULATOR |
| TS1581CZ525 | 5.0 AMP POSITIVE VOLTAGE REGULATOR |
| TS1581 | 5.0 AMP POSITIVE VOLTAGE REGULATOR |
| 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 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| TS1581CZ53.3 | 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 |
| TS1581CZ533 | 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 |
| TS1581CZ5C0 | 制造商:TSC 制造商全称:Taiwan Semiconductor Company, Ltd 功能描述:5A Dual Input LDO |
| TS1581CZ5XXC0 | 制造商:TSC 制造商全称:Taiwan Semiconductor Company, Ltd 功能描述:5A Dual Input LDO |
| TS1582 | 制造商:TSC 制造商全称:Taiwan Semiconductor Company, Ltd 功能描述:3A Dual Input Low Dropout Positive Voltage Regulator |
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