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TJ4203 데이터시트 PDF




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부품번호 TJ4203 기능
기능 300mA Ultra Low Dropout Linear Regulator
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TJ4203 데이터시트, 핀배열, 회로
300mA Ultra Low Dropout Linear Regulator
TJ4203
FEATURES
Ultra Low Dropout Voltage
Compatible with low ESR MLCC as Input/Output Capacitor
Good Line and Load Regulation
Guaranteed Output Current of 300mA
Available in SOT23-5L, DFN2X2-6L and SC70-5L
Fixed Output Voltages : 1.0V, 1.2V, 1.8V, 2.5V, and 3.3V
SENSE Option Improves Load Regulation
Over-Temperature/Over-Current Protection
-40 ºC to 125 ºC Junction Temperature Range
APPLICATION
LCD TVs and SETTOP Boxes
Battery Powered Equipments
Motherboards and Graphic Cards
Microprocessor Power Supplies
Peripheral Cards
High Efficiency Linear Regulators
Battery Chargers
DESCRIPTION
The TJ4203 series of high performance ultra-low dropout
linear regulators operates from 2.5V to 6V input supply and
provides ultra-low dropout voltage, high output current with
low ground current. Wide range of preset output voltage
options are available. These ultra-low dropout linear
regulators respond fast to step changes in load which
makes them suitable for low voltage micro-processor
applications. The TJ4203 is developed on a CMOS process
technology which allows low quiescent current operation
independent of output load current. This CMOS process
also allows the TJ4203 to operate under extremely low
dropout conditions.
SOT23-5L
DFN2X2-6L
SC70-5L
ORDERING INFORMATION
Device
Package
TJ4203GSF5-ADJ
TJ4203GSF5-X.X
SOT23-5L
TJ4203GQ-ADJ
TJ4203GQ-X.X
DFN2X2-6L
TJ4203GTF5-ADJ
TJ4203GTF5-X.X
SC70-5L
X.X = Output Voltage = 1.0, 1.2, 1.8, 2.5, and 3.3
Absolute Maximum Ratings
CHARACTERISTIC
Input Supply Voltage (Survival)
Enable Input Voltage (Survival)
Maximum Output Current
Lead Temperature (Soldering, 5 sec)
Storage Temperature Range
Operating Junction Temperature Range
SYMBOL
VIN
VEN
IMAX
TSOL
TSTG
TJOPR
MIN.
-
-
-
-65
-40
MAX.
6.5
6.5
300
260
150
125
UNIT
V
V
mA
ºC
ºC
ºC
Apr. 2011 – Rev.1.0
1/10
HTC




TJ4203 pdf, 반도체, 판매, 대치품
300mA Ultra Low Dropout Linear Regulator
BASIC APPLICATION
Typical 5 Pin Application
VIN
CIN
1uF
VIN VOUT
TJ4203
EN EN
SENSE
GND
COUT
1uF
VOUT
TJ4203
5 Pin Remote Load Sense Application
VIN
CIN
1uF
VIN VOUT
TJ4203
EN EN GND SENSE
VOUT
COUT
1uF
L
O
A
D
Typical Adjustable Version Application
VIN
CIN
1uF
VIN VOUT
TJ4203
CFF
EN EN GND ADJ
VOUT
R2 COUT
2.2uF
R1
* TJ4203 can deliver a continuous current of 300mA 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 300mA may be still undeliverable.
* See Application Information.
Apr. 2011 – Rev.1.0
4/10
HTC

4페이지










TJ4203 전자부품, 판매, 대치품
300mA Ultra Low Dropout Linear Regulator
TJ4203
Output Adjustment (Adjustable Version)
An adjustable output device has output voltage range of 0.8V to 5.0V. The operating condition of VIN and
the operating characteristics of VOUT depend on the dropout voltage performance in accordance with
output load current. To obtain a desired output voltage, the following equation can be used with R1
resistor range of 100to 50k.
VIN
CIN
1uF
VIN VOUT
TJ4203
CFF
EN EN GND ADJ
VOUT
R2
COUT
2.2uF
R1
Fig. 4. Application for Adjustable Output Voltage
R2
R1
VOUT
0.8
1
To enhance output stability, a feed-forward capacitor of 10nF to 1uF can be placed in series with VOUT and
ADJ.(Refer to "Component Selection" Section)
SENSE Pin
In applications where the regulator output is not very close to the load, the TJ4203 can provide better
remote load regulation characteristics using the SENSE pin. TJ4203 regulates the voltage at the output
pin. Hence, the voltage at the remote load will be lower than the voltage at the output pin as a value of
the voltage drop across the trace series resistance. If the sense option pin is not required, the sense pin
must be connected to the VOUT pin. Connecting the sense pin to the remote load will provide regulation
at the remote load because the TJ4203 regulates the voltage at the sense pin when the sense option pin
is used.
Fig. 5. Conventional Linear Regulator Application
Fig.6. Remote Load Sense Application
Maximum Output Current Capability
The TJ4203 can deliver a continuous current of 300mA over the full operating junction temperature range.
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 300mA
may be still undeliverable due to the restriction of the power dissipation of TJ4203. Under all possible
conditions, the junction temperature must be within the range specified under operating conditions.
The temperatures over the device are given by:
TC = TA + PD X θCA
TJ = TC + PD X θJC
TJ = TA + PD X θJA
Apr. 2011 – Rev.1.0
7/10
HTC

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TJ4203

300mA Ultra Low Dropout Linear Regulator

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