Datasheet

UNISONIC TECHNOLOGIES CO., LTD
LP2950/2951
LINEAR INTEGRATED CIRCUIT
100 mA LOW-DROPOUT
VOLTAGE REGULATOR
1
1
TO-92

TO-252
DESCRIPTION
The UTC LP2950/2951 are monolithic integrated voltage regulators
with low dropout voltage, and low quiescent current. It includes many
features that suitable for different applications.
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FEATURES
SOP-8
Fixed output versions, 2.5V, 3V, 3.3V, 3.6V and 5V, are available.
High accuracy output voltage.
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 err flog available for 8 pin package.
Output voltage programmable for LP2951.
DIP-8
1
DFN-8(3x3)
ORDERING INFORMATION
Ordering Number
Lead Free
LP2950L-xx-D08-T
LP2950L-xx-T92-B
LP2950L-xx-T92-K
LP2950L-xx-TN3-R
LP2951L-D08-T
Note: Pin Assignment: I: VIN
O: VOUT
Halogen Free
LP2950G-xx-D08-T
LP2950G-xx-S08-R
LP2950G-xx-T92-B
LP2950G-xx-T92-K
LP2950G-xx-TN3-R
LP2950G-xx-K08-3030-R
LP2951G-D08-T
LP2951G-S08-R
LP2951G-K08-3030-R
G: GND
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Copyright © 2014 Unisonic Technologies Co., Ltd
Package
Packing
DIP-8
SOP-8
TO-92
TO-92
TO-252
DFN-8(3×3)
DIP-8
SOP-8
DFN-8(3×3)
Tube
Tape Reel
Tape Box
Bulk
Tape Reel
Tape Reel
Tube
Tape Reel
Tape Reel
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LP2950/2951

LINEAR INTEGRATED CIRCUIT
MARKING INFORMATION
PACKAGE
VOLTAGE CODE
MARKING
DIP-8
SOP-8
25:
33:
36:
50:
TO-92
2.5V
3.3V
3.6V
5.0V
TO-252
DFN-8(3×3)
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UNISONIC TECHNOLOGIES CO., LTD
LP2950/2951

LINEAR INTEGRATED CIRCUIT
PIN CONFIGURATIONS
UTC LP2950
1
2
3
UTC LP2950
OUTPUT
INPUT
GND
INPUT
TO-92 Plastic Package Bottom View
OUTPUT
1
8
INPUT
SENSE
2
7
FEEDBACK
OUTPUT
SOT-252 Package
OUTPUT
1
NC
2
8
INPUT
7
NC
6
NC
5
ERROR
UTC
LP2950
UTC LP2951
SHUTDOWN 3
6
5V TAP
4
5
ERROR
GND
GND
SOP-8 OR DIP-8 PACKAGE FOR UTC
LP2951
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Copyright © 2014 Unisonic Technologies Co., Ltd
SHUTDOWN 3
GND
4
SOP-8 OR DIP-8 PACKAGE FOR UTC
LP2950
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LP2950/2951

LINEAR INTEGRATED CIRCUIT
BLOCK DIAGRAM
FOR LP2950
FOR LP2951
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
LINEAR INTEGRATED CIRCUIT
ABSOLUTE MAXIMUM RATINGS
PARAMETER
SYMBOL
RATINGS
UNIT
Supply Voltage
VCC
-0.3 ~ +30
V
Feedback Voltage
VFB
-1.5 ~ +30
V
Shutdown Voltage
VSHDN
-0.3 ~ +30
V
Power Dissipation
PD
Internally Limited
W
Operation Junction Temperature
TJ
-40 ~ +125
C
Storage Temperature
TSTG
-65 ~ +150
C
Note: Absolute maximum ratings are those values beyond which the device could be permanently damaged.
Absolute maximum ratings are stress ratings only and functional device operation is not implied.

THERMAL DATA
PARAMETER
Junction-to-Ambient
Junction-to-Case

SYMBOL
TO-92
TO-252
SOP-8
DIP-8
DFN-8(3×3)
TO-92
TO-252
SOP-8/DIP-8
DFN-8(3×3)
θJA
θJC
RATING
160
92
90
105
59
83
6
45
10
UNIT
C/W
C/W
ELECTRICAL CHARACTERISTICS (TJ=25C, VIN=6V, IL=100A, CL=1μF, unless otherwise specified.)
For All Version:
PARAMETER
SYMBOL
Output Voltage
VOUT
Output Voltage
Output Voltage Temperature
Coefficient
Line Regulation
Load Regulation
VOUT
TcVo
∆VOUT
∆VOUT
Dropout Voltage
VD
Ground Current
IG
Dropout Ground Current
Current Limit
Output Noise (10Hz ~ 100KHz)
(Bypass=0.01F pins 7 to 1
(LP2951))
TEST CONDITION
MIN
TJ=25C (Note 1)
VOUT×0.98
-25C≦TJ≦+85C(Note 1)
VOUT×0.98
100A≦IL≦100mA, TJ≦TJ(max) VOUT×0.98
ILIMIT
eN
20
6V≦VIN≦30V
100μA≦IL≦100 mA
IL=100μA
IL=100mA (Note 2)
IL=100μA
IL=100mA
VIN=4.5V,IL=100μA
VOUT=0
CL=1μF
CL=200μF
CL=3.3μF
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TYP
MAX
UNIT
VOUT VOUT×1.02
V
VOUT VOUT×1.02
V
VOUT VOUT×1.02
V
0.03
0.04
50
380
75
8
110
160
0.1
0.1
80
450
120
12
170
215
100
ppm/C
0.2
0.2
150
600
140
14
200
250
430
160
100
%
%
mV
μA
mA
μA
mA
μV
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LINEAR INTEGRATED CIRCUIT
ELECTRICAL CHARACTERISTICS(Cont.)
For UTC LP2951 8-Pin Version Only
PARAMETER
SYMBOL
VREF
Reference Voltage
VREF
Reference Voltage
Feedback pin Bias Current
IFB
Reference Voltage Temperature
VREF(TC)
Coefficient
Feedback Bias Current
IFB(TC)
Temperature Coefficient
Error Comparator
Output Leakage Current
IO(LEAK)
Output Low Voltage
VOL
VTHU
Upper
Threshold Voltage
VTHL
Lower
VHYS
Hysteresis
Shutdown Input
Low
VIL
Input Logic Voltage
High
VIH
TEST CONDITION
Over temperature(Note 4)
MIN
1.22
1.19
TYP
1.235
20
VOH=30V
VIN=4.5V, IOL=400A
(Note 3)
(Note 3)
(Note 3)
MAX
1.25
1.27
40
UNIT
V
V
nA
50
ppm/C
0.1
nA/C
1
250
3.2
7.6
15
A
mV
%VO
%VO
mV
Regulator ON
1.3
0.70
V
Regulator OFF
2.0
30
50
μA
VSHDN=2.4V
Shutdown Pin Input Current
ISHDN
VSHDN=30V
450
600
μA
VSHDN≧2V, VIN≦30V, VOUT=0
Regulator Output Current
IDFF
3
10
μA
Shutdown
Feedback pin tied to 5V Tap.
Note: 1. Additional conditions for 8-pin versions are FB pin tied to 5VTAP, Output tied to 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.
4. VREFVOUT(VIN-1V), 2.3VVIN30V, 100AIL100mA, TJTJ(MAX)
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
LINEAR INTEGRATED CIRCUIT
TYPICAL APPLICATION CIRCUIT
10 Ampere Low Dropout Regulator
CURRENT LIMIT
SECTION
+VIN=Vout+0.5V
0.05
680
2N3906
UTC
D65H0
470
8
+VIN
4.7M
ERROR
5
UTC LP2951
3
220
20k
SD
FB
GND
4
+VOUT 100m A
10k
R1
7
Vout
100 F
1%
4.7 F
R2
1
47
0.033 F
VOUT=1.23V*(1+R1/R2)
For 5V output use internal resistors.Wire pin 6 to 7 and wire pin 2 to +VOUT
Fig.1
V IN
UTC
UTC
UTC
UTC
UTC
LP2950-2.5
LP2950-3.0
LP2950-3.3
LP2950-3.6
LP2950-5.0
V OUT
Fig.2
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
LINEAR INTEGRATED CIRCUIT
TYPICAL CHARACTERISTICS
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
LINEAR INTEGRATED CIRCUIT
TYPICAL CHARACTERISTICS(Cont.)
UTC assum es no responsibility for equipm ent failures that result from using products at v alues that
exceed, ev en m om entarily, rated v alues (such as m axim um ratings, operating condition ranges, or
other param eters) 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 system s where
m alfunction 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 inform ation
presented in this docum ent does not form part of any quotation or contract, is believ ed to be accurate
and reliable and m ay be changed without notice.
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