ChipFind - документация

Электронный компонент: L4941BP

Скачать:  PDF   ZIP
1/14
January 2004
s
LOW DROPOUT VOLTAGE (450mV Typ. at
1A)
s
VERY LOW QUIESCENT CURRENT
s
THERMAL SHUTDOWN
s
SHORT CIRCUIT PROTECTION
s
REVERSE POLARITY PROTECTION
DESCRIPTION
The L4941 is a three terminal 5V positive
regulators available in TO-220, TO-220FP and
D
2
PAK packages, making it useful in a wide range
of industrial and consumer applications. Thanks to
its very low input/output voltage drop, these
devices
are
particularly
suitable
for
battery
powered equipments, reducing consumption and
prolonging battery life. It employs internal current
limiting, antisaturation circuit, thermal shut-down
and safe area protection.
L4941
VERY LOW DROP 1A REGULATOR
BLOCK DIAGRAM
TO-220
D
2
PAK
TO-220FP
DPAK
L4941
2/14
ABSOLUTE MAXIMUM RATINGS
Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these condition is
not implied.
THERMAL DATA
CONNECTION DIAGRAM (top view)
ORDERING CODES
(*) Available in Tape & Reel with the suffix "-TR".
Symbol
Parameter
Value
Unit
V
I
Forward Input Voltage
30
V
V
IR
Reverse Input Voltage (R
O
=100
)
-15
V
I
O
Output Current
Internally Limited
mA
P
D
Power Dissipation
Internally Limited
mW
T
stg
Storage Temperature Range
-40 to +150
C
T
op
Operating Junction Temperature Range
-40 to +150
C
Symbol
Parameter
TO-220
TO-220FP
D
2
PAK
DPAK
Unit
R
thj-case
Thermal Resistance Junction-case
3
5
3
8
C/W
R
thj-amb
Thermal Resistance Junction-ambient
50
60
62.5
100
C/W
TO-220
TO-220FP
D
2
PAK
DPAK
ORDERING CODE
PACKAGE
L4941BV
TO-220
L4941BP
TO-220FP
L4941BD2T
D
2
PAK
L4941BDT (*)
DPAK
L4941
3/14
TEST CIRCUITS
Figure 1 : DC Parameter
Figure 2 : Load Rejection
Figure 3 : Ripple Rejection
L4941
4/14
ELECTRICAL CHARACTERISTICS (Refer to test circuit, V
I
=7V, C
I
= 0.1
F, C
O
= 22
F,
T
J
= 25C, unless otherwise specified.)
TYPICAL CHARACTERISTICS
Figure 4 : Dropout Voltage vs Output Current
Figure 5 : Dropout Voltage vs Temperature
Symbol
Parameter
Test Conditions
Min.
Typ.
Max.
Unit
V
O
Output Voltage
I
O
= 5mA to 1A
V
I
= 6 to 14V
4.8
5
5.2
V
V
I
Input Voltage
I
O
= 5 mA
16
V
V
O
Line Regulation
V
I
= 6 to 16V
I
O
= 5 mA
5
20
mV
V
O
Load Regulation
I
O
= 5mA to 1A
8
20
mV
I
O
= 0.5A to 1A
5
15
mV
I
q
Quiescent Current
I
O
= 5 mA
V
I
= 6V
4
8
mA
I
O
= 1A
V
I
= 6V
20
40
mA
I
q
Quiescent Current Change
I
O
= 5 mA
V
I
= 6 to 14V
3
mA
I
O
= 1A
V
I
= 6 to 14V
-10
mA
V
d
Dropout Voltage
I
O
= 0.5A
250
450
mV
I
O
= 1A
450
700
mV
V
O
/
T Output Voltage Drift
0.6
mv/C
SVR
Supply Voltage Rejection
f = 120Hz
I
O
= 1A
58
68
dB
I
sc
Short Circuit Current
V
I
= 14V
1.6
2.0
A
V
I
= 6V
1.8
2.2
Z
O
Output Impedance
f = 1KHz
I
O
= 0.5A
30
m
e
N
Output Noise Voltage
B = 100Hz to 100KHz
30
V/V
O
L4941
5/14
Figure 6 : Output Voltage vs Temperature
Figure 7 : Quiescent Current vs Temperature
Figure 8 : Quiescent Current vs Input Voltage
Figure 9 : Quiescent Current vs Output Current
Figure 10 : Short Circuit Current vs Temperature
Figure 11 : Peak Output Current vs Input/Output
Differential Voltage