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PDF TJ49300 Data sheet ( Hoja de datos )
| Número de pieza | TJ49300 | |
| Descripción | 3.0A Very Low Input / Output Voltage Ultra Low Dropout Linear Regulator | |
| Fabricantes | HTC Korea | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de TJ49300 (archivo pdf) en la parte inferior de esta página. Total 12 Páginas | ||
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HTC Korea
TJ49300
3.0A Very Low Input / Output Voltage
Ultra Low Dropout Linear Regulator
FEATURES
Ultra Low Dropout Voltage
Low Quiescent Current
Excellent Line and Load Regulation
Guaranteed Output Current of 3.0A
Available in SOP-8-PP, TO-252, and TO-263 Packages
Adjustable Output Voltage Down to 0.8V
Fixed Output Voltages : 0.8V, 1.0V and 1.2V
Logic Controlled Shutdown Option
Over-Temperature/Over-Current Protection
-40°C to 125°C Junction Temperature Range
SOP-8-PP
TO252-5L
APPLICATIONS
Motherboards and Graphic Cards
Microprocessor Power Supplies
Peripheral Cards
Low Voltage Digital ICs
High Efficiency Linear Regulators
SMPS Post Regulators
TO-263-5L
DESCRIPSION
The TJ49300 is a series of 3.0A high performance ultra
low dropout linear regulator ideal for powering core
voltages of low-power microprocessors. The
TJ49300 implements a dual supply configuration
allowing for very low output impedance. The
TJ49300 requires a bias input supply and a main input
supply, allowing for very low input voltages on the
main supply rail. The input supply operates from
1.4V to 5.5V and the bias supply requires between 3V
and 5.5V for proper operation. The TJ49300 offers
fixed output voltages 1.0V and 1.2V and adjustable
output voltages down to 0.8V. The TJ49300 is
developed on a CMOS technology that allows low
quiescent current operation independent of output
current. This technology also allows the TJ49300 to
operate under extremely low dropout conditions.
ORDERING INFORMATION
Device
TJ49300GDP-X.X
TJ49300GRS-X.X
TJ49300GR-X.X
X.X = Output Voltage = ADJ, 1.0 and 1.2
Package
SOP-8-PP
TO-252-5L
TO-263-5L
February 2011
1 HTC
Free Datasheet http://www.datasheet4u.com/
1 page  
TYPICAL APPLICATION
VIN
VBIAS
IN OUT
BIAS EN
CIN CBIAS
GND
TJ49300
VOUT
VEN COUT
VIN
VBIAS
IN OUT
BIAS ADJ
CIN CBIAS
GND
VOUT
COUT
VIN
VBIAS
IN OUT
BIAS ADJ
CIN CBIAS
GND
VOUT
R1
COUT
R2
VIN
VBIAS
IN OUT
BIAS ADJ
CIN CBIAS
GND
CFF R1
R2
VOUT
COUT
* See application information for the details over external capacitor.
** TJ49300 can deliver a continuous current of 3.0A over the full operating temperature. However, the output current is limited by
the restriction of power dissipation which differs from packages. A heat sink may be required depending on the maximum power
dissipation and maximum ambient temperature of application. With respect to the applied package, the maximum output
current of 3.0A may be still undeliverable.
*** For the details, see Application Information.
February 2011
5 HTC
Free Datasheet http://www.datasheet4u.com/
5 Page 
TJ49300
plane area relationship, the maximum allowable power dissipation could be evaluated with respect to the
ambient temperature. As shown in graph, the higher copper plane area leads θJA. And the higher ambient
temperature leads lower maximum allowable power dissipation.
All this relationship is based on the aforesaid equation ; θJA = TRmax / PD = (TJmax – TAmax) / PD
The graph below is valid for the thermal resistance specified in the Thermal Information section on page 2.
3
2.5
2
1.5
1
0.5
0
0
SOP-8-PP
TO-252-5L
TO-263-5L
20 40 60 80 100 120 140
AMBIENT TEMPERATURE [℃]
February 2011
11 HTC
Free Datasheet http://www.datasheet4u.com/
11 Page | ||
| Páginas | Total 12 Páginas | |
| PDF Descargar | [ Datasheet TJ49300.PDF ] | |
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