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TJ4230 데이터시트 PDF




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부품번호 TJ4230 기능
기능 3A Ultra Low Dropout Linear Regulator
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TJ4230 데이터시트, 핀배열, 회로
3A Ultra Low Dropout Linear Regulator
TJ4230
FEATURES
Ultra Low Dropout Voltage
Compatible with low ESR MLCC as Input/Output Capacitor
Good Line and Load Regulation
Guaranteed Output Current of 3A
Available in SOP8-PP, TO-252 and TO-263
Packages
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 TJ4230 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 TJ4230 is developed on a CMOS process
technology which allows low quiescent current operation
independent of output load current. This CMOS process
also allows the TJ4230 to operate under extremely low
dropout conditions.
SOP8-PP
TO-252 3L / 5L PKG
TO-263 3L / 5L PKG
ORDERING INFORMATION
Device
Package
TJ4230GDP-ADJ
TJ4230GDP-X.X
SOP8-PP
TJ4230GRS-ADJ
TJ4230GRS-X.X
TO-252 3L/5L
TJ4230GR-ADJ
TJ4230GR-X.X
TO-263 3L/5L
X.X = Output Voltage = 1.0, 1.2, 1.8, 2.5, and 3.3
Absolute Maximum Ratings
CHARACTERISTIC
SYMBOL
MIN.
MAX.
UNIT
Input Supply Voltage (Survival)
Enable Input Voltage (Survival)
Maximum Output Current
Lead Temperature (Soldering, 5 sec)
Storage Temperature Range
Operating Junction Temperature Range
Package Thermal Resistance *
VIN
VEN
IMAX
TSOL
TSTG
TJOPR
ΘJA-SOP8-PP
- 6.5
- 6.5
-3
260
-65 150
-40 125
68
V
V
A
ºC
ºC
ºC
ºC/W
* Calculated from package in still air, mounted to 2.6mm X 3.5mm(minimum foot print) 2 layer PCB without thermal vias per JESD51 standards.
Apr. 2011 – Rev. 1. 0
1/9
HTC
Free Datasheet http://www.datasheet4u.com/




TJ4230 pdf, 반도체, 판매, 대치품
3A Ultra Low Dropout Linear Regulator
BASIC APPLICATION
Typical 3 Pin Application
VIN
CIN
10uF
VIN VOUT
TJ4230
GND
TJ4230
COUT
10uF
VOUT
Typical 5 / 8 Pin Application
VIN
CIN
10uF
EN
VIN VOUT
TJ4230
EN GND SENSE
VOUT
COUT
10uF
5 / 8 Pin Remote Load Sense Application
VIN
CIN
10uF
VIN VOUT
TJ4230
EN EN GND SENSE
VOUT
COUT
10uF
L
O
A
D
Typical Adjustable Version Application
VIN
CIN
10uF
VIN VOUT
TJ4230
Cff
EN EN
ADJ
GND
VOUT
R2 COUT
10uF
R1
* TJ4230 can deliver a continuous current of 3A 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 3A may be still undeliverable.
* See Application Information.
Apr. 2011 – Rev. 1. 0
4/9 HTC
Free Datasheet http://www.datasheet4u.com/

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TJ4230 전자부품, 판매, 대치품
3A Ultra Low Dropout Linear Regulator
TJ4230
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 presented at Fig. 7. To obtain a desired output voltage, the following equation can be
used with R1 resistor range of 100to 50k.
VIN
VIN VOUT
VOUT
CIN
10uF
TJ4230
CFF
R2 COUT
EN EN GND ADJ
10uF
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 TJ4230 can provide better
remote load regulation characteristics using the SENSE pin. TJ4230 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 TJ4230 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 TJ4230 can deliver a continuous current of 3A 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 3A may
be still undeliverable due to the restriction of the power dissipation of TJ4230. 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
7/9
HTC
Free Datasheet http://www.datasheet4u.com/

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TJ4230

3A Ultra Low Dropout Linear Regulator

HTC Korea
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