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參數(shù)資料
| 型號： | TS5215_07 |
| 廠商： | Taiwan Semiconductor Co., Ltd. |
| 英文描述： | 300mA Low Noise LDO Voltage Regulator with Enable |
| 中文描述： | 300mA的低噪聲LDO穩(wěn)壓器的啟用 |
| 文件頁數(shù)： | 5/9頁 |
| 文件大?。?/td> | 301K |
| 代理商： | TS5215_07 |
TS5215
300mA Low Noise LDO
Voltage Regulator with Enable
Application Information (Continue)
5/9
Version: A07
Dual Supply Operation
When used in dual supply systems where the regulator load is returned to a negative supply, the output voltage must
be diode clamped to ground.
Thermal Characteristics
TS5215 series is designed to provide 300mA (5V version) of continuous current in a very small package. Maximum
power dissipation can be calculated based on the output current and the voltage drop across the part. To determine
the maximum power dissipation of the package, use the junction-ambient thermal resistance of the device and the
following basic equation:
P
D(MAX)
= [ T
J(MAX)
– T
A
] /
Θ
JA
T
J(MAX)
is the maximum junction temperature of the die(125
o
C), and Ta is the ambient operating temperature.
Θ
JA
is
layout dependent, the actual power dissipation of the regulator circuit can be determined using the equation:
P
D
= (V
IN
– V
OUT
) * I
OUT
+ V
IN
* I
GND
Substituting Pd(max) for Pd and solving for the operating conditions that are critical to the application will give the
maximum operating conditions for the regulator circuit. For example, when operating the TS5215CX33 at room
temperature with a minimum footprint layout, the maximum input voltage for a set output current can be determined
as follows:
P
D(MAX)
= (125
o
C – 25
o
C) / 220
o
C/W
P
D(MAX)
= 455mW
The junction to ambient thermal resistance for the minimum footprint is 220
o
C/W, the maximum power dissipation
must not be exceeded for proper operation. Using the output voltage of 3.3V and an output current of 120mA, the
maximum input voltage can be determined. From the electrical characteristics table, the maximum ground current for
445mW = (V
IN
– 3.3V ) * 300mA + V
IN
* 2.5mA
445mW = V
IN
* 300mA – 3.3 * 300mA + V
IN
* 2.5mA
445mW = V
IN
* 300mA – 990mW + V
IN
* 2.5mA
1435mW = V
IN
* 302.5mA
V
IN
(max) = 4.74V
Therefore, a 3.3V application at 300mA of output current can accept a maximum input voltage of 4.74V in a SOT-25
package.
Fixed Output Regulator Design
V
IN
Ultra Low Noise Fixed Voltage Application
Includes a 470pF capacitor for low noise operation and
shows EN connected to IN for an application where
enable/shutdown is not required. C
OUT
= 2.2uF minimum.
Low Noise Fixed Voltage Application
An example of a low noise configuration where
bypass is not required. C
OUT
= 2.2uF minimum
V
OUT
V
IN
EN
on
off
C
OUT
2.2uF
TS5215CX5xx
V
OUT
C
OUT
2.2uF
C
BYP
470pF
TS5215CX5xx
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| TS5215 | 300mA Low Noise LDO Voltage Regulator with Enable |
| TS5215CS | 300mA Low Noise LDO Voltage Regulator with Enable |
| TS5215CX5 | 300mA Low Noise LDO Voltage Regulator with Enable |
| TS5215CY5 | 300mA Low Noise LDO Voltage Regulator with Enable |
| TS522 | PRECISION LOW NOISE DUAL OPERATIONAL AMPLIFIERS |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TS5215CS | 功能描述:低壓差穩(wěn)壓器 - LDO 300mA Low Noise LDO Adj Vltg Reg RoHS:否 制造商:Texas Instruments 最大輸入電壓:36 V 輸出電壓:1.4 V to 20.5 V 回動電壓（最大值）:307 mV 輸出電流:1 A 負載調(diào)節(jié):0.3 % 輸出端數(shù)量: 輸出類型:Fixed 最大工作溫度:+ 125 C 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-20 |
| TS5215CS RL | 制造商:SKMI/Taiwan 功能描述:300MA LOW NOISE LDO VOLTAGE REGULATOR WITH ENABLE |
| TS5215CS25 | 功能描述:低壓差穩(wěn)壓器 - LDO 300mA Low Noise LDO Vltg Reg RoHS:否 制造商:Texas Instruments 最大輸入電壓:36 V 輸出電壓:1.4 V to 20.5 V 回動電壓（最大值）:307 mV 輸出電流:1 A 負載調(diào)節(jié):0.3 % 輸出端數(shù)量: 輸出類型:Fixed 最大工作溫度:+ 125 C 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-20 |
| TS5215CS25 RL | 制造商:SKMI/Taiwan 功能描述:300MA LOW NOISE LDO VOLTAGE REGULATOR WITH ENABLE |
| TS5215CS30 RL | 制造商:SKMI/Taiwan 功能描述:SOP-8;300MA LOW NOISE LDO VOLT |
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