LM2954 LINEAR INTEGRATED CIRCUIT
1
300 mA LOW-DROPOUT VOLTAGE
REGULATOR
DESCRIPTION
The Contek 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 and SOP-8 packages.
FEATURES
*High accuracy 3.0, 3.3, 3.7 or 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.
TO-92
SOP-8
DIP-8
1
APPLICATIONS
*Battery powered equipment.
*High efficient linear regulator down to 1.24V.
*Cellular phones.
ORDERING INFORMATION
PART NUMBER TEMPERATURE RANGE PACKAGE ACCURACY
Contek LM2954-3.0 -40 C ~ +125 C 3-Pin TO-92 plastic 1.0%
Contek LM2954-3.3 -40 C ~ +125 C 3-Pin TO-92 plastic 1.0%
Contek LM2954 -40 C ~ +125 C 3-Pin TO-92 plastic 1.0%
Contek LM2954F -40 C ~ +125 C 8-Pin SOP-8 plastic 1.0%
Contek LM2954P -40 C ~ +125 C 8-Pin DIP-8 plastic 1.0%
PIN CONFIGURATIONS
1
2
3
4
8
7
6
5
INPUT
FEEDBACK
5V TAPSHUTDOWN
SENSE
OUTPUT
Contek
LM2954
GND
ERROR
213
OUTPUT
GND
INPUT
Contek LM2954
TO-92 Plastic Package
Bottom View
SOP-8 OR DIP-8 PACKAGE
Fig. 1
CONTEK
Contek Microelectronics Co.,Ltd.
http://www.contek-ic.com E-mail:sales@contek-ic.com
LM2954 LINEAR INTEGRATED CIRCUIT
2
BLOCK DIAGRAM
5
4
6
2
187
3
60mV
330KW
TOCMOS
OR TTL
5V150mA
MAX.
FEEDBACK
INPUT OUTPUT
SENSE
5VTAP
GND
ERROR
DETECTION
COMPARATOR
ERROR
AMPLIFIER
FROMCMOS
ORTTL
1.23
REF
SHUT
DOWN
UNRAGULATED
DC
ERROR
182kW
60k
W
1.5mF
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
ELECTRICAL CHARACTERISTICS
( Tested at Tj=25 C,VIN=6V,IL=100mA and C L=1F.unless otherwise specified)
PARAMETER PART NUMBER TEST CONDITIONS MIN. TYP. MAX. UNIT
Output Voltage Contek LM2954-3.0
Contek LM2954-3.3
Contek LM2954-3.7
Contek LM2954
Contek LM2954
T
J=25 C
(note 1)
2.97
3.27
3.66
4.95
3.0
3.3
3.7
5.0
3.03
3.33
3.74
5.05
V
Contek LM2954-3.0
Contek LM2954-3.3
Contek LM2954-3.7
Contek LM2954
Contek LM2954
-25 C<=T
J<=+85 C
(note 1)
2.94
3.23
3.63
4.9
3.0
3.3
3.7
5.0
3.06
3.36
3.77
5.1
V
Contek LM2954-3.0
Contek LM2954-3.3
Contek LM2954-3.7
Contek LM2954
Contek LM2954
100mA<=I
L<=300 mA
Tj<=Tj(max)
(note 1)
2.94
3.23
3.66
4.9
3.0
3.3
3.7
5.0
3.06
3.36
3.74
5.1
V
Output Voltage
Temperature Coefficient
20 100 ppm/ C
Line Regulation 6V<=VIN<=30V 0.1 0.2 %
Contek
CONTEK
Contek Microelectronics Co.,Ltd.
http://www.contek-ic.com E-mail:sales@contek-ic.com
LM2954 LINEAR INTEGRATED CIRCUIT
3
PARAMETER PART NUMBER TEST CONDITIONS MIN. TYP. MAX. UNIT
Load Regulation 100mA<=IL<=300 mA 0.2 0.5 %
Dropout Voltage IL=100mA
I
L=200mA (note 2)
50
38080450
150
600
mV
Ground Current IL=100mA
I
L=200mA
0.7580.12120.1414mA
Dropout Ground Current VIN=4.5V,I L=100mA 110 170 200 mA
Current Limit Vout=0 300 mA
Output Noise 10Hz to
100KHz
CL=1mF
C
L=200mF
C
L=3.3mF
(Bypass=0.01mF)
pins 7 to (
Contek 2954 )
430
160
100
mV
For 8-Pin Version Only
Reference Voltage 1.22 1.235 1.25 V
Reference Voltage (Note 7) 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 VOH=30V 1 mA
Output Low Voltage VIN=4.5V
I
OL=400mA
250 mV
Upper Threshold Voltage (Note 3) 3.2 %VO
Lower Threshold Voltage (Note 3) 7.6 %VO
Hysteresis (Note 3) 15 mV
Shutdown Input
Input Logic Voltage
Low(Regulator ON)
High(Regulator OFF) 2.0
1.3
0.70
V
Shutdown Pin Input
Current
Vshutdown=2.4V 30 50 mA
Vshutdown=30V 450 600 mA
Regulator Output
Current Shutdown
Vshutdown>=2V,V IN<=30V,
V
out=0,
Feedback pin tied to 5V Tap.
310mA
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.
CONTEK
Contek Microelectronics Co.,Ltd.
http://www.contek-ic.com E-mail:sales@contek-ic.com
LM2954 LINEAR INTEGRATED CIRCUIT
4
APPLICATION CIRCUIT
5
4
6
2
187
3
60mV
330KW
TO CMOS
OR TTL
3.7V
350mA
FEEDBACK INPUT OUTPUT
SENSE
3.7V
GND
ERROR
DETECTION
COMPARATOR
ERROR
AMPLIFIER
FROM CMOS
OR TTL
1.23
REF
SHUT
DOWN
UNRAGULATED
DC
ERROR
1.5mF
10A LOW DROPOUT REGULATOR
+V IN
FB
VoutGND
SD
ERROR
Contek LM2954
8
5
7
14
3
CURRENT
LIMIT
SECTION
+V
IN =V ou t+0.5V
0.05
W
470 W
680 W
4.7M W
20k W
220 W
0.033 m F
47W
R1
R2
4.7 m F
100 m F
1%
10k W
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
Contek
D65H0
Fig.2
Contek
CONTEK
Contek Microelectronics Co.,Ltd.
http://www.contek-ic.com E-mail:sales@contek-ic.com
LM2954 LINEAR INTEGRATED CIRCUIT
5
Contek LM2954-3.0
Contek LM2954-3.3
Contek LM2954-3.7
Contek LM2954-5.0
Vin Vout
1 mF1 mF
Fig. 3
CONTEK
Contek Microelectronics Co.,Ltd.
http://www.contek-ic.com E-mail:sales@contek-ic.com
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