1A Ultra Low Dropout Linear Regulator
FEATURES
Ultra Low Dropout Voltage
Low Ground Pin Current
Excellent Line and Load Regulation
Guaranteed Output Current of 1A
Available in SOT-23-5, SOT-223, TO-252,
and SOP-8 Packages
Fixed Output Voltages : 1.2V, 1.5V, 1.8V, 2.5V, and 3.3V
SENSE Option Improves Load Regulation
Over-Temperature/Over-Current Protection
-40℃ to 125℃ Junction Temperature Range
Moisture Sensitivity Level 3
SOT23-5L PKG
TJ3964
SOP-8 PKG
SOT-223 3L PKG
APPLICATION
Battery Powered Equipments
Motherboards and Graphic Cards
Microprocessor Power Supplies
Peripheral Cards
High Efficiency Linear Regulators
Battery Chargers
TO-252 3L / 5L PKG
DESCRIPSION
The TJ3964 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 TJ3964 is developed on a CMOS process technology which allows low
quiescent current operation independent of output load current. This CMOS process also allows the TJ3964 to
operate under extremely low dropout conditions.
ORDERING INFORMATION
Device
Package
TJ3964SF5-ADJ
TJ3964SF5-X.X
SOT-23 5L
TJ3964GSF5-ADJ
TJ3964GSF5-X.X
TJ3964D-ADJ
SOP-8
TJ3964D-X.X
TJ3964S-X.X
SOT-223 3L
TJ3964GRS-ADJ
TO-252 3L / 5L
TJ3964GRS-X.X
X.X = Output Voltage = 1.2, 1.5, 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
(1) It is recommended for V
EN
voltage not to exceed V
IN
voltage.
Dec. 2009 – Rev. 1.1
-1-
SYMBOL
V
IN
V
EN (1)
I
MAX
T
SOL
T
STG
T
JOPR
MIN.
-0.3
-0.3
-
MAX.
6.5
6.5
1.0
260
UNIT
V
V
A
℃
℃
℃
-65
-40
150
125
HTC
1A Ultra Low Dropout Linear Regulator
TYPICAL APPLICATION
Typical 3 Pin Application
INPUT
C
IN
68uF
-
V
IN
V
OUT
OUTPUT
TJ3964
+
TJ3964
GND
+
C
OUT
-
33uF
Typical 5 / 8 Pin Application
INPUT
C
IN
68uF
-
V
IN
V
OUT
OUTPUT
+
EN
EN
TJ3964
GND
SENSE
+
C
OUT
-
33uF
5 / 8 Pin Remote Load Sense Application
INPUT
C
IN
68uF
V
IN
V
OUT
OUTPUT
L
O
A
D
TJ3964
EN
EN
GND
SENSE
C
OUT
33uF
Typical Adjustable Version Application
INPUT
C
IN
68uF
-
V
IN
V
OUT
OUTPUT
R2
ADJ
R1
+
EN
EN
TJ3964
GND
+
C
OUT
33uF
-
* TJ3964 can deliver a continuous current of 1A 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 1A may be still undeliverable.
* When a Pull-Up resistor is connected between V
EN
terminal and V
EN
Signal (or V
IN
line), the resistance
of the Pull-Up resistor should be kept under 10kΩ.
* See Application Information.
Dec. 2009 – Rev. 1.1
-5-
HTC
PCB Design
京公网安备 11010802033920号
EEWORLD
