- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄373711 > TS5214CY (Taiwan Semiconductor Co., Ltd.) 300mA Low Noise LDO Voltage Regulator PDF資料下載
參數(shù)資料
| 型號： | TS5214CY |
| 廠商： | Taiwan Semiconductor Co., Ltd. |
| 英文描述： | 300mA Low Noise LDO Voltage Regulator |
| 中文描述： | 300mA的低噪聲LDO穩(wěn)壓器 |
| 文件頁數(shù)： | 3/7頁 |
| 文件大?。?/td> | 255K |
| 代理商： | TS5214CY |
TS5214
300mA Low Noise LDO Voltage Regulator
Application Information
TS5214 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:
3/7
Version: C07
P
D
(max) = [ T
J
(max) – Ta ] /
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
– Vout ) * Iout + V
IN
* Ignd
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 TS5214CX33 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) = (125oC – 25oC) / 220oC/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
120mA output current is 2.5mA.
445mW = (V
IN
– 3.3V ) * 120mA + V
IN
* 2.5mA
445mW = V
IN
* 120mA – 3.3 * 120mA + V
IN
* 2.5mA
445mW = V
IN
* 120mA – 395mW + V
IN
* 2.5mA
840mW = V
IN
* 122.5mA
V
IN
(max) = 6.85V
Therefore, a 3.3V application at 120mA of output current can accept a maximum input voltage of 6.85V in a SOT-23
package.
Input Capacitor Requirement
An input capacitor of 0.1uF or greater is recommended when the device is more than 10” away from the bulk AC
supply capacitance or when the supply is a battery.
Output Capacitor Requirement
TS5214 requires an output capacitor to maintain stability and improve transient response is necessary. 2.2uF
minimum is recommended. Larger values improve the regulator’s transient response. The output capacitor value
may be increased without limit.
The output capacitor should have an ESR (effective series resistance) less than 5
and a resonant frequency above
1MHz. Ultra low ESR capacitors can cause a low amplitude oscillation on the output and/or under damped transient
response. Most of tantalum or aluminum electrolytic capacitors are adequate; film types will work. Since many
aluminum electrolytic have electrolytes that freeze at about –30
o
C, solid tantalums are recommended for operation
below –25
o
C. At lower values of output current, less output capacitance is required for output stability. The capacitor
can be reduced to 0.47uF for current below 10mA or 0.33uF for currents below 1mA
.
No Load Stability
TS5214 will remain stable and in regulation with no load, unlike many other voltage regulators. This is especially
important in CMOS RAM keep alive applications.
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.
相關PDF資料 |
PDF描述 |
|---|---|
| TS5215_07 | 300mA Low Noise LDO Voltage Regulator with Enable |
| 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 |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| TS5214CY25 | 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 |
| TS5214CY25 RF | 制造商:SKMI/Taiwan 功能描述:SOT-89;300MA LOW NOISE LDO VOL |
| TS5214CY33 | 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 |
| TS5214CY33 RF | 制造商:SKMI/Taiwan 功能描述:SOT-89;300MA LOW NOISE LDO VOL |
| TS5214CY50 | 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 |
發(fā)布緊急采購，3分鐘左右您將得到回復。