Datasheet

UNISONIC TECHNOLOGIES CO., LTD
LM2954
LINEAR INTEGRATED CIRCUIT
300mA 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 with TO-92,
DIP-8, SOP-8 and SOT-223 packages.

FEATURES
*High Accuracy Fixed Output.
*Output Voltage Programmable and Logic Controlled Shutdown
And Error Flag Available for DIP and SOP Package.
*Extremely Low Quiescent Current And Dropout Voltage.
*Extremely Tight Load And Line Regulation.
*Current and Thermal Limiting.
*Very low Temperature Coefficient.

ORDERING INFORMATION
Ordering Number
Lead Free
Halogen Free
LM2954G-xx-AA3-R
LM2954G-xx-AA3-A-R
LM2954L-xx-D08-T
LM2954G-xx-D08-T
LM2954G-xx-S08-R
LM2954L-xx-T92-B
LM2954G-xx-T92-B
LM2954L-xx-T92-K
LM2954G-xx-T92-K
Note: Pin assignment: I: VIN O: VOUT
G: GND
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Copyright © 2015 Unisonic Technologies Co., Ltd
Package
SOT-223
SOT-223
DIP-8
SOP-8
TO-92
TO-92
Pin assignment
1
2
3
I
G
O
G
O
I
refer to Pin
Configurations
O
O
G
G
I
I
Packing
Tape Reel
Tape Reel
Tube
Tape Reel
Tape Box
Bulk
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LM2954

LINEAR INTEGRATED CIRCUIT
MARKING INFORMATION
PACKAGE
VOLTAGE CODE
SOT-223
33:3.3V
50:5.0V
TO-92
3.3:3.3V
5.0:5.0V
MARKING
UTC
LM2954
Voltage Code
L: Lead Free
G: Halogen Free
Data Code
1
DIP-8
3.3:3.3V
5.0:5.0V
AD: ADJ
SOP-8
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LM2954

LINEAR INTEGRATED CIRCUIT
PIN CONFIGURATIONS
UTC LM2954
1
2
3
OUTPUT
INPUT
GND
TO-92 Plastic Package Bottom View
UTC LM2954
INPUT
GND
OUTPUT
SOT-223 Package
OUTPUT
1
8
SENSE
2
7
FEEDBACK
3
6
5V TAP
4
5
ERROR
INPUT
UTC LM2954
SHUTDOWN
GND
SOP-8 or DIP-8 Package
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www.unisonic.com.tw
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QW-R102-002.N
LM2954

LINEAR INTEGRATED CIRCUIT
BLOCK DIAGRAM
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LM2954

LINEAR INTEGRATED CIRCUIT
ABSOLUTE MAXIMUM RATINGS
PARAMETER
SYMBOL
VALUE
UNIT
Supply Voltage
VCC
-0.3 ~ +30
V
Feedback Voltage
VFB
-1.5 ~ +30
V
Shutdown Voltage
VSHDN
-0.3 ~ +30
V
Comparator Output Voltage
VOUT
-0.3 ~ +30
V
Junction Temperature
TJ
+125
°C
Operating Temperature
TOPR
-40 ~ +85
°C
Storage temperature
TSTG
-40 ~ +150
°C
Note: 1.Absolute maximum ratings are those values beyond which the device which the device could be permanently
damaged. Absolute maximum ratings are stress ratings only and functional device operation is not implied.
2.The device is guaranteed to meet performance specification within 0°C~+70°C operating temperature range
and assured by design from -20°C~+85°C, characteristic and correlation with static process control.

ELECTRICAL CHARACTERISTICS(TJ=25°C, VIN=6V, IL=100μA, CL=1μF, unless otherwise specified)
PARAMETER
LM2954-3.3
Output Voltage
LM2954-5.0
Output Voltage Temperature Coefficient
Line Regulation
Load Regulation
Dropout Voltage
Ground Current
Dropout Ground Current
Current Limit
Output Noise (10Hz to 100KHz)
SYMBOL
VOUT
TEST CONDITIONS
TJ=25°C
TCVO
△VOUT 6V≦VIN≦30V
△VOUT 100μA≦IL≦300mA
IL=100mA
VD
IL=200mA (note 2)
IL=100μA
IGND
IL=200μA
ID
VIN=4.5V, IL=100μA
ILIMIT
VOUT=0
CL=1μF
eN
CL=200μF
CL=3.3μF
UNISONIC TECHNOLOGIES CO., LTD
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MIN.
3.23
4.90
20
TYP.
3.3
5.0
0.1
0.2
380
300
450
0.12
12
560
MAX. UNIT
3.37
V
5.10
100 ppm/°C
0.2
%
0.5
400
mV
600
0.23
mA
14
650
μA
mA
430
μV
160
100
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LM2954

LINEAR INTEGRATED CIRCUIT
ELECTRICAL CHARACTERISTICS(Cont.)
LM2954-ADJ FOR 8-PIN VERSION ONLY
PARAMETER
SYMBOL
Reference Voltage
VREF
TEST CONDITIONS
VREFVOUT(VIN-1V),
2.3VVIN18V,
100μAIL100mA, TJTJMAX
MIN
1.22
TYP
1.235
MAX
1.25
UNIT
V
1.27
V
40
nA
Reference Voltage
VREF
Feedback Pin Bias Current
Reference Voltage Temperature
Coefficient
Feedback Bias Current Temperature
Coefficient
ERROR COMPARATOR
Output Leakage Current
Output Low Voltage
Upper Threshold Voltage
Lower Threshold Voltage
Hysteresis
SHUTDOWN INPUT
IB(FB)
20
TCVREF
50
ppm/°C
TCIO
0.1
nA/°C
IO(LEAK)
VOL
VTHD(UP)
VTHD(LOW)
VHYS
VOH=30V
VIN=4.5V, IOL=400μA
(Note 3)
(Note 3)
(Note 3)
1.19
1
250
3.2
7.6
15
μA
mV
%VOUT
%VOUT
mV
Low (Regulator ON)
1.3
0.70
V
High (Regulator OFF)
2.0
VSHDN=2.4V
30
50
μA
Shutdown Pin Input Current
II(SHDN)
VSHDN=30V
450
600
μA
VSHDN≧2V,VIN≦30V, VOUT=0,
3
10
μA
Regulator Output Current Shutdown
IO(SHDN)
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
(VOUT=5V) and VSHDN≦0.8V.
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.
3. Comparator thresholds are expressed in terms of percentage value of voltage output.
Input Logic Voltage
VI(LOG)
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LM2954

LINEAR INTEGRATED CIRCUIT
APPLICATION CIRCUIT (10A Low Dropout Regulator)
For 8 Pins
CURRENT LIMIT
SECTION
+VIN=VOUT+0.5V
0.05Ω
680Ω
2N3906
UTC
D65H0
470Ω
8
+VIN
4.7MΩ
ERROR
5
UTC LM2954
3
20kΩ
220Ω
SD
GND
4
FB
+VOUT 10 A
10kΩ
R1
7
VOUT
1
100μF
1%
4.7μF
R2
47Ω
0.033μF
VOUT=1.23V*(1+R1/R2)
For 5V output use internal resistors.Wire pin 6 to 7 and wire pin 2 to +VOUT
For 3 Pins
UTC assumes no responsibility for equipment failures that result from using products at values that
exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or
other parameters) listed in products specifications of any and all UTC products described or contained
herein. UTC products are not designed for use in life support appliances, devices or systems where
malfunction of these products can be reasonably expected to result in personal injury. Reproduction in
whole or in part is prohibited without the prior written consent of the copyright owner. The information
presented in this document does not form part of any quotation or contract, is believed to be accurate
and reliable and may be changed without notice.
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
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QW-R102-002.N
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