HTC Korea
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
TJ49300
3.0A Very Low Input / Output Voltage
Ultra Low Dropout Linear Regulator
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
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HTC
TJ49300
ABSOLUTE MAXIMUM RATINGS
CHARACTERISTIC
Input Supply Voltage (Survival)
Bias Supply Voltage (Survival)
Enable Input Voltage (Survival)
Output Voltage (Survival)
Lead Temperature (Soldering, 5 sec)
Storage Temperature Range
SYMBOL
V
IN
V
BIAS
V
EN
V
OUT
T
SOL
T
STG
MIN.
-0.3
-0.3
-0.3
-0.3
MAX.
6
6
6
V
IN
+0.3
260
UNIT
V
V
V
V
°C
°C
-65
150
RECOMMENDED OPERATING RATINGS
CHARACTERISTIC
Input Supply Voltage
Bias Supply Voltage
Enable Input Voltage
Ambient Temperature Range
Operating Junction Temperature Range
SYMBOL
V
IN
V
BIAS
V
EN
T
AOPR
T
JOPR
MIN.
1.4
3
0
-40
-40
MAX.
5.5
5.5
V
BIAS
105
125
UNIT
V
V
V
°C
°C
THERMAL INFORMATION
THERMAL METRIC
Thermal Resistance (SOP-8-PP) *
Thermal Resistance (TO-252-5L) *
Thermal Resistance (TO-263-5L) *
* Calculated from package in still air, mounted to minimum foot print PCB(1 oz., 2-layer).
θ
JC
15
θ
JA
75
68
45
UNIT
°C/W
°C/W
°C/W
ORDERING INFORMATION
V
OUT
Package
SOP-8-PP
ADJ
TO-252 5L
TO-263 5L
1.0V
1.2V
Order No.
TJ49300GDP-ADJ
TJ49300GRS-ADJ
TJ49300GR-ADJ
Description
3.0A, Adjustable
3.0A,
Adjustable
Marking
TJ49300G
TJ49300G
TJ49300G
Compliance
RoHS, Halogen Free
RoHS, Halogen Free
RoHS, Halogen Free
Status
Active
Active
Active
Contact Us
Contact Us
3.0A, Adjustable
February 2011
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HTC
TJ49300
TYPICAL APPLICATION
V
IN
V
BIAS
C
IN
C
BIAS
IN
OUT
V
OUT
V
EN
BIAS
GND
EN
C
OUT
V
IN
V
BIAS
C
IN
C
BIAS
IN
OUT
V
OUT
BIAS
GND
ADJ
C
OUT
V
IN
V
BIAS
C
IN
C
BIAS
IN
OUT
R1
V
OUT
BIAS
GND
ADJ
R2
C
OUT
V
IN
V
BIAS
C
IN
C
BIAS
IN
OUT
C
FF
R1
C
OUT
R2
V
OUT
BIAS
GND
ADJ
* 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
Embedded System
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