UTC LM2954 LINEAR INTEGRATED CIRCUIT
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.
ORDERING INFORMATION
PART NUMBER TEMPERATURE RANGE PACKAGE ACCURACY
UTC LM2954-5.0
UTC LM2954-3.3
UTC LM2954
UTC LM2954
-40°C ~ +125°C
-40°C ~ +125°C
-40°C ~ +125°C
-40°C ~ +125°C
1
1
SOT-223
TO-92
SOP-8 DIP-8
3-Pin TO-92 plastic 1.0%
3-Pin TO-92 plastic 1.0%
8-Pin SOP-8 plastic 1.0%
8-Pin DIP-8 plastic 1.0%
UTC UNISONIC TECHNOLOGIES CO., LTD. 1
QW-R102-002,B
UTC LM2954 LINEAR INTEGRATED CIRCUIT
PIN CONFIGURATIONS
UTC LM2954
21 3
OUTPUT
GND
TO-92 Plastic Package
Bottom View
OUTPUT
SENSE
1
2
3
4
GND
SOP-8 OR DIP-8 PACKAGE
UTC
LM2954
UTC LM2954
INPUT
8
INPUT
7
FEEDBACK
6
5V TAPSHUTDOWN
5
ERROR
INPUT GND OUTPUT
SOT-223 PACKAGE
Fig. 1
UTC UNISONIC TECHNOLOGIES CO., LTD. 2
QW-R102-002,B
UTC LM2954 LINEAR INTEGRATED CIRCUIT
BLOCK DIAGRAM
UNRAGULATED
FROM CMOS
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
Operating Junction
Temperature
DC
OR TTL
330K
5V 150mA
MAX.
Ω
FEEDBACK
SHUT
DOWN
INPUT OUTPUT
ERROR
3
60mV
1.23
REF
AMPLIFIER
DETECTION
COMPARATOR
ERROR
182k
60k
187
SENSE
2
Ω
5V TAP
6
GND
1.5 µF
5
TO CMOS
OR TTL
4
Ω
ERROR
°C
Tj -40 ~ +125
°C
UTC UNISONIC TECHNOLOGIES CO., LTD. 3
QW-R102-002,B
UTC LM2954 LINEAR INTEGRATED CIRCUIT
ELECTRICAL CHARACTERISTICS
(Tested at Tj=25°C,V
PARAMETER PART NUMBER TEST CONDITIONS MIN. TYP. MAX. UNIT
Output Voltage UTC LM2954-3.3
UTC LM2954-3.3
UTC LM2954-3.3
Output Voltage
Temperature Coefficient
Line Regulation 6V<=VIN<=30V 0.1 0.2 %
Load Regulation
Dropout Voltage IL=100mA
Ground Current
Dropout Ground Current
Current Limit Vout=0 300 mA
Output Noise 10Hz to
100KHz
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
Reference Voltage
Temperature Coefficient
Feedback Bias Current
Temperature Coefficient
Error Comparator
Output Leakage Current VOH=30V 1
Output Low Voltage VIN=4.5V
Upper Threshold
Voltage
Lower Threshold
Voltage
Hysteresis (Note 3) 15 mV
Shutdown Input
IN=6V,IL=100µA and CL=1F.unless otherwise specified)
J=25°C
T
UTC LM2954-5.0
UTC LM2954
UTC LM2954-5.0
UTC LM2954
UTC LM2954-5.0
UTC LM2954
20 100
20 40 nA
50
0.1
(Note 3) 3.2 %VO
(Note 3) 7.6 %VO
(note 1)
-25°C<=T
(note 1)
100µA<=I
Tj<=Tj(max)
(note 1)
100µA<=I
L=200mA (note 2)
I
I
L=100µA
L=200mA
I
V
C
C
C
(Bypass=0.01µF)
pins 7 to (
OL=400µA
I
J<=+85°C
L<=300 mA
L<=300 mA
IN=4.5V,IL=100µA
L=1µF
L=200µF
L=3.3µF
utc2954 )
3.27
4.95
3.23
3.23
0.75
3.3
3.33
5.0
5.05
3.3
5.0
3.3
5.0
80
12
3.36
5.1
3.36
5.1
150
600
0.14
14
160
100
4.9
4.9
0.2 0.5 %
50
380
450
0.12
8
110 170 200
430
250 mV
V
V
V
ppm/°C
mV
mA
µA
µV
ppm/°C
nA/°C
µA
UTC UNISONIC TECHNOLOGIES CO., LTD. 4
QW-R102-002,B
UTC LM2954 LINEAR INTEGRATED CIRCUIT
PARAMETER PART NUMBER TEST CONDITIONS MIN. TYP. MAX. UNIT
Input Logic Voltage
Low(Regulator ON)
High(Regulator OFF)
Shutdown Pin Input
Current
Vshutdown=2.4V
Vshutdown=30V 450 600
Regulator Output
Current Shutdown
Vshutdown>=2V,VIN<=30V,
out=0,
V
Feedback pin tied to 5V Tap.
Note 1: Additional conditions for 8-pin versions are feedback tied to 5V Tap an Output tied to Output Sense
out=5V) and Vshutdown<=0.8V.
(V
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), 2.3V≤Vin≤30V, 100µA≤I
≤100mA, TJ≤T
L
JMAX
APPLICATION CIRCUIT (10A LOW DROPOUT REGULATOR)
CURRENT
SECTION
680
Ω
2N3906
20k
Ω
0.033 µF
LIMIT
4.7M
220
+V
IN=Vou
t+0.5V
470
Ω
Ω
3
Ω
8
+V
IN
ERROR
UTC LM2954
SD
GND
Vout
10k
Ω
5
R1
7
FB
14
47
R2
Ω
1.3
2.0
30 50
3 10
0.05
Ω
UTC
D65H0
+
V
OUT
4.7
µ
1%
F
100
10 A
V
0.70
µA
µA
µA
µ
F
Vout=1.23V*(1+R1/R2)
For 5V output
use internal resistors.Wire pin 6 to 7
and wire pin 2 to +V
out
Fig.2
UTC UNISONIC TECHNOLOGIES CO., LTD. 5
QW-R102-002,B
UTC LM2954 LINEAR INTEGRATED CIRCUIT
Vin Vout
UTC LM2954-3.3
UTC LM2954-5.0
1 µF1 µF
Fig. 3
UTC UNISONIC TECHNOLOGIES CO., LTD. 6
QW-R102-002,B
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