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Электронный компонент: UTCLM2954

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UTC LM2954
LINEAR INTEGRATED CIRCUIT
UTC
UNISONIC TECHNOLOGIES CO., LTD.
1
QW-R102-002,B
300 mA LOW-DROPOUT VOLTAGE
REGULATOR
DESCRIPTION
The UTC LM2954 is a monolithic integrated voltage
regulator with low dropout voltage, and low quiescent current.
It includes many features that suitable for different
applications.
Available in 3-pin TO-92,DIP-8,SOP-8 and SOT-223
packages.
FEATURES
*High accuracy 3.3, 5V fixed output for
TO-92, DIP-8 and SOP-8 package.
*Extremely low quiescent current and dropout voltage.
*Extremely tight load and line regulation.
*Current and thermal limiting.
*Very low temperature coefficient.
*Logic controlled shutdown and error flag available for DIP
and SOP package.
*Output voltage programmable for DIP and SOP package.
APPLICATIONS
*Battery powered equipment.
*High efficient linear regulator down to 1.24V.
*Cellular phones.
TO-92
SOP-8
DIP-8
1
SOT-223
1


ORDERING INFORMATION
PART NUMBER
TEMPERATURE RANGE PACKAGE
ACCURACY
UTC LM2954-5.0
-40
C ~ +125C
3-Pin TO-92 plastic
1.0%
UTC LM2954-3.3
-40
C ~ +125C
3-Pin TO-92 plastic
1.0%
UTC LM2954
-40
C ~ +125C
8-Pin SOP-8 plastic
1.0%
UTC LM2954
-40
C ~ +125C
8-Pin DIP-8 plastic
1.0%
UTC LM2954
LINEAR INTEGRATED CIRCUIT
UTC
UNISONIC TECHNOLOGIES CO., LTD.
2
QW-R102-002,B

PIN CONFIGURATIONS
2
1 3
OUTPUT
GND
INPUT
UTC LM2954
TO-92 Plastic Package
Bottom View
1
2
3
4
8
7
6
5
INPUT
FEEDBACK
5V TAP
SHUTDOWN
SENSE
OUTPUT
UTC
LM2954
GND
ERROR
SOP-8 OR DIP-8 PACKAGE
UTC LM2954
INPUT
GND
OUTPUT
SOT-223 PACKAGE
Fig. 1
UTC LM2954
LINEAR INTEGRATED CIRCUIT
UTC
UNISONIC TECHNOLOGIES CO., LTD.
3
QW-R102-002,B

BLOCK DIAGRAM
5
4
6
2
1
8
7
3
60mV
330K
TO CMOS
OR TTL
5V 150mA
MAX.
FEEDBACK
INPUT
OUTPUT
SENSE
5V TAP
GND
ERROR
DETECTION
COMPARATOR
ERROR
AMPLIFIER
FROM CMOS
OR TTL
1.23
REF
SHUT
DOWN
UNRAGULATED
DC
ERROR
182k
60k
1.5
F

ABSOLUTE MAXIMUM RATINGS
PARAMETER SYMBOL
VALUE
UNIT
Supply Voltage
Vcc
-0.3 ~ +30
V
Feedback Voltage
Vfeedback
-1.5 ~ +30
V
Shutdown Voltage
Vshutdown
-0.3 ~ +30
V
Comparator Output Voltage
Vco
-0.3 ~ +30
V
Storage temperature
Tstr
-65 ~ +150
C
Operating Junction
Temperature
Tj
-40 ~ +125
C
UTC LM2954
LINEAR INTEGRATED CIRCUIT
UTC
UNISONIC TECHNOLOGIES CO., LTD.
4
QW-R102-002,B
ELECTRICAL CHARACTERISTICS
(Tested at Tj=25
C,V
IN
=6V,I
L
=100
A and C
L
=1F.unless otherwise specified)
PARAMETER PART
NUMBER
TEST
CONDITIONS MIN.
TYP.
MAX.
UNIT
Output Voltage
UTC LM2954-3.3
UTC LM2954-5.0
UTC LM2954
T
J
=25
C

(note 1)
3.27
4.95
3.3
5.0
3.33
5.05
V
UTC
LM2954-3.3
UTC LM2954-5.0
UTC LM2954
-25
C<=T
J
<=+85
C

(note 1)
3.23
4.9
3.3
5.0
3.36
5.1
V
UTC
LM2954-3.3
UTC LM2954-5.0
UTC LM2954
100
A<=I
L
<=300 mA
Tj<=Tj(max)
(note 1)
3.23
4.9
3.3
5.0
3.36
5.1
V
Output Voltage
Temperature Coefficient
20
100
ppm/
C
Line Regulation
6V<=V
IN
<=30V
0.1
0.2
%
Load Regulation
100
A<=I
L
<=300 mA
0.2 0.5 %
Dropout Voltage
I
L
=100mA

I
L
=200mA (note 2)
50
380
80
450
150
600
mV
Ground Current
I
L
=100
A

I
L
=200mA
0.75
8
0.12
12
0.14
14
mA
Dropout Ground Current
V
IN
=4.5V,I
L
=100
A
110
170 200
A
Current Limit
Vout=0
300
mA
Output Noise 10Hz to
100KHz
C
L
=1
F
C
L
=200
F
C
L
=3.3
F
(Bypass=0.01
F)
pins 7 to (
utc
2954 )
430
160
100

V
For 8-Pin Version Only
Reference Voltage
1.22
1.235
1.25
V
Reference Voltage
(Note 4)
1.19
1.27
V
Feedback Pin Bias
Current
20 40 nA
Reference Voltage
Temperature Coefficient
50
ppm/
C
Feedback Bias Current
Temperature Coefficient
0.1
nA/
C
Error Comparator
Output Leakage Current
V
OH
=30V
1
A
Output Low Voltage
V
IN
=4.5V
I
OL
=400
A
250
mV
Upper Threshold
Voltage
(Note
3)
3.2
%V
O
Lower Threshold
Voltage
(Note
3)
7.6
%V
O
Hysteresis
(Note
3)
15
mV
Shutdown Input
UTC LM2954
LINEAR INTEGRATED CIRCUIT
UTC
UNISONIC TECHNOLOGIES CO., LTD.
5
QW-R102-002,B
PARAMETER PART
NUMBER
TEST
CONDITIONS MIN.
TYP.
MAX.
UNIT
Input Logic Voltage

Low(Regulator ON)
High(Regulator OFF)

2.0
1.3
0.70
V
Shutdown Pin Input
Current
V
shutdown
=2.4V
30 50
A
V
shutdown
=30V
450
600
A
Regulator Output
Current Shutdown
Vshutdown>=2V,V
IN
<=30V,
V
out
=0,
Feedback pin tied to 5V Tap.
3 10
A

Note 1: Additional conditions for 8-pin versions are feedback tied to 5V Tap an Output tied to Output Sense
(V
out
=5V) and Vshutdown<=0.8V.
Note 2: Dropout Voltage is defined as the input to output differential at which the output voltage drops 100mV below
its nominal value measured at 1V differential.
Note 3: Comparator thresholds are expressed in terms of percentage value of voltage output.
Note 4: Vref
Vout(Vin-1V), 2.3VVin30V, 100AI
L
100mA, T
J
T
JMAX



APPLICATION CIRCUIT (10A LOW DROPOUT REGULATOR)
+V
IN
FB
Vout
GND
SD
ERROR
UTC LM2954
8
5
7
1
4
3
CURRENT
LIMIT
SECTION
+V
IN
=V
ou
t+0.5V
0.05
470
680
4.7M
20k
220
0.033
F
47
R1
R2
4.7
F
100
F
1%
10k
2N3906
+V
OUT
10 A
Vout=1.23V*(1+R1/R2)
For 5V output
use internal resistors.Wire pin 6 to 7
and wire pin 2 to +V
out
UTC
D65H0
Fig.2
UTC LM2954
LINEAR INTEGRATED CIRCUIT
UTC
UNISONIC TECHNOLOGIES CO., LTD.
6
QW-R102-002,B
UTC LM2954-3.3
UTC LM2954-5.0
Vin
Vout
1
F
1
F
Fig. 3