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PDF TS39152 Data sheet ( Hoja de datos )
| Número de pieza | TS39152 | |
| Descripción | (TS39151 / TS39152) 1.5A Ultra Low Dropout Positive Voltage Regulator | |
| Fabricantes | Taiwan Semiconductor | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de TS39152 (archivo pdf) en la parte inferior de esta página. Total 7 Páginas | ||
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TS39151/52
1.5A Ultra Low Dropout Positive Voltage Regulator
Low Dropout Voltage 0.4V (typ.)
Enable Input Control
Adjustable Output
Error Flag Detection
General Description
The TS39151/52 series are 1.5A ultra low dropout linear voltage regulators that provide low voltage, high current output
from an extremely small package. These regulator offers extremely low dropout (typically 400mV at 1.5A) and very low
ground current (typically 12mA at 1.5A).
The TS39151/52 series are fully protected against over current faults, reversed input polarity, reversed lead insertion,
over temperature operation, positive and negative transient voltage spikes, logic level enable control and error flag which
signals whenever the output falls out of regulation.
On the TS39151/52, the enable pin may be tied to Vin if it is not required for enable control. This series are offered in
5-pin TO-220, TO-263 package.
Features
Dropout voltage typically 0.4V @Io=1.5A
Output current up to 1.5A
Low ground current
Output voltage trimmed before assembly
Extremely fast transient response
Reversed leakage protection
Reverse battery protection
www.DataSheEetr4rUor.cfolamg signals output out of regulation
Internal current limit
Thermal shutdown protection
Ordering Information
Part No.
Operating Temp. Package
(Junction)
TS39151CZ5xx
TS39151CM5xx
-40 ~ +125 oC
TO-220-5L
TO-263-5L
TS39152CZ5
TO-220-5L
TS39152CM5
TO-263-5L
Note: Where xx denotes voltage option, available are
5.0V, 3.3V, 2.5V and 1.8V.
Applications
Battery power equipment
LDO linear regulator for PC add-in cards
PowerPCTM power supplies
Multimedia and PC processor supplies
Absolute Maximum Rating (Note 1)
Supply Voltage
Enable Voltage
Storage Temperature Range
Lead Soldering Temperature (260 oC)
ESD
High efficiency linear power supplies
High efficiency post regulator for switching supply
Low-voltage microcontrollers and digital logic
SMPS post regulator
Vin
Ven
TSTG
-20V ~ +20
+20
-65 ~ +150
5
(Note 3)
V
V
oC
S
TS39151/52
1-1 2004/09 rev. A
1 page  
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 application. Its
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
The TS39151/52 series requires an output capacitor to
www.DataSmheaeint4taUin.cosmtability 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, PD
must be calculated.
The below formula shows the voltages and currents for
calculating the PD in the regulator:
Iin = IL / IG
PD = (Vin-Vout) * IL + (Vin) * IG
Ex. PD = (3.3V-2.5V) * 0.5A + 3.3V * 11mA
= 400mW + 36mW
= 436mW
Remark: IL is output load current,
IG is ground current.
Vin is input voltage
Vout is output voltage
The next parameter which must be calculated is the
maximum allowable temperature rise, TR(max). this is
calculated by the using to formula:
TR(max) = TJ(max) – TA(max)
Where: TJ(max) is the maximum allowable junction
temperature, which is 125 oC for commercial
grade parts.
TA(max) is the maximum ambient
temperature which will be encountered in the
application. Using the calculated values for TR(max)
and PD, the maximum allowable value for the junction
to ambient thermal resistance, θja, can now be found:
θja = TR(max) / PD
TS39151/52
5-5 2004/09 rev. A
5 Page | ||
| Páginas | Total 7 Páginas | |
| PDF Descargar | [ Datasheet TS39152.PDF ] | |
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