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參數(shù)資料
| 型號： | TS39152CZ55.0 |
| 廠商： | Taiwan Semiconductor Co., Ltd. |
| 元件分類： | 基準電壓源/電流源 |
| 英文描述： | 5.0 AMP POSITIVE VOLTAGE REGULATOR |
| 中文描述： | 5.0放大器正電壓穩(wěn)壓器 |
| 文件頁數(shù)： | 5/7頁 |
| 文件大?。?/td> | 147K |
| 代理商： | TS39152CZ55.0 |
TS39151/52
5-5
2004/09 rev. A
Application Information
Application Information
The TS39151/52 series are high performance with low
dropout voltage regulator suitable for moderate to high
current
and
voltage
regulator
400mV(typ) dropout voltage at full load and over
temperature makes it especially valuable in battery
power systems and as high efficiency noise filters in
post regulator applications. Unlike normal NPN
transistor design, where the base to emitter voltage
drop and collector to emitter saturation voltage limit the
minimum dropout voltage, dropout performance of the
PNP output of these devices is limited only by low Vce
saturation voltage.
The TS39151/52 series is fully protected from damage
due to fault conditions. Linear current limiting is
provided. Output current during overload conditions is
constant. Thermal shutdown the device when the die
temperature exceeds the maximum safe operating
temperature. Transient protection allows device survival
even when the input voltage spikes above and below
nominal. The output structure of these regulators allows
voltages in excess of the desired output voltage to be
applied without reverse current flow.
Capacitor Requirement
application.
Its
The TS39151/52 series requires an output capacitor to
maintain stability and improve transient response is
necessary. The value of this capacitor is dependent
upon the output current, lower currents allow smaller
capacitors. TS39151/52 series regulators are stable
with the 10uF minimum capacitor value at full load.
Where the regulator is powered from a source with high
AC impedance, a 0.1uF capacitor connected between
input and ground is recommended. The capacitor
should have good characteristics to above 250KHz. The
capacitance values will be help to improved transient
response, ripple rejection and output noise.
Minimum Load Current
The TS39151/52 series is specified between finite
loads. If the output current is too small leakage currents
dominate and the output voltage rises. A 10mA
minimum load current swamps any expected leakage
current across the operating temperature range.
Thermal Characteristics
TS39151/52 series linear regulators are simple to use,
the most complicated design parameters to consider
are thermal characteristics, thermal design requires the
following application specification parameters:
Maximum ambient temperature, Ta
Output current, Iout
Output voltage, Vout
Input voltage, Vin
We calculate the power dissipation of the regulator
from these numbers and the device parameters from
this data sheet. A heatsink may be required depending
on the maximum power dissipation and maximum
ambient temperature of the application. Under all
possible operating conditions, the junction temperature
must be within the range specified under absolute
maximum ratings. To determine if the heatsink is
required, the power dissipated by the regulator, P
D
must be calculated.
The below formula shows the voltages and currents for
calculating the P
D
in the regulator:
Iin = I
L
/ I
G
P
D
= (Vin-Vout) * I
L
+ (Vin) * I
G
Ex. P
D
= (3.3V-2.5V) * 0.5A + 3.3V * 11mA
= 400mW + 36mW
= 436mW
Remark: I
L
is output load current,
I
G
is ground current.
Vin is input voltage
Vout is output voltage
The next parameter which must be calculated is the
maximum allowable temperature rise, T
R
(max). this is
calculated by the using to formula:
T
R
(max) = T
J
(max) – T
A
(max)
Where: T
J
(max) is the maximum allowable junction
temperature, which is 125
o
C for commercial
grade parts.
T
A
(max)
is
the
temperature which will be encountered in the
application. Using the calculated values for T
R
(max)
and P
D
, the maximum allowable value for the junction
to ambient thermal resistance,
θ
ja, can now be found:
θ
ja = T
R
(max) / P
D
maximum
ambient
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| TS39152CZ5C0 | 制造商:TSC 制造商全稱:Taiwan Semiconductor Company, Ltd 功能描述:1.5A Ultra Low Dropout Voltage Regulator with Multi-Function |
| TS39153CM5 | 制造商:TSC 制造商全稱:Taiwan Semiconductor Company, Ltd 功能描述:1.5A Ultra Low Dropout Voltage Regulator with Multi-Function |
| TS39153CM518 | 功能描述:低壓差穩(wěn)壓器 - LDO 1.5A,Ultra LDO 1.8V 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 |
| TS39153CM518 RN | 制造商:SKMI/Taiwan 功能描述:LDO Regulator Pos 1.8V 1.5A 6-Pin(5+Tab) TO-263 T/R |
| TS39153CM525 | 功能描述:低壓差穩(wěn)壓器 - LDO 1.5A,Ultra LDO 2.5V 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 |
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