Page 1
查询LP2950-36-D08-B供应商
UNISONIC TECHNOLOGIES CO., LTD
LP2950/2951
LINEAR INTEGRATED CIRCUIT
100 mA LOW-DROPOUT
VOLTAGE REGULATOR
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.
FEATURES
* 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.
1
*Pb-free plating product number:
LP2950L-XX/LP2951L
TO-92
SOP-8
DIP-8
ORDERING INFORMATION
Ordering Number
Normal Lead Free Plating
LP2950-xx-D08-T LP2950L-xx-D08-T DIP-8 Tube
LP2950-xx-S08-T LP2950L-xx-S08-T SOP-8 Tube
LP2950-xx-S08-R LP2950L-xx-S08-R SOP-8 Tape Reel
LP2950-xx-T92-B LP2950L-xx-T92-B TO-92 Tape Box
LP2950-xx-T92-K LP2950L-xx-T92-K TO-92 Bulk
LP2951-D08-T LP2951L-D08-T DIP-8 Tube
LP2951-S08-T LP2951L-S08-T SOP-8 Tube
LP2951-S08-R LP2951L-S08-R SOP-8 Tape Reel
Note: xx: Output Voltage Code (For LP2950 only)
LP2950L-xx-S08-R
(1)P acking Type
(2)P ackage Type
(3)O utput V oltage Code
(4)Lead Plating
Package Packing
(1) B: Tape Box, K: Bulk, R: Tape Reel, T: Tube
(2) D08: DIP-8, S08: SOP-8, T92: TO-92
(3) xx: refer to Output Voltage Code
(4) L: Lead Free Plat ing, Blank: Pb/ S n
OUTPUT VOLTAGE CODE(For LP2950)
OUTPUT VOLTAGE CODE
2.5V 25
3.0V 30
3.3V 33
3.6V 36
5.0V 50
www.unisonic.com.tw 1 of 7
Copyright © 2005 Unisonic Technologies Co., Ltd QW-R102-001,J
Page 2
LP2950/2951 LINEAR INTEGRATED CIRCUIT
PIN CONFIGURATIONS
UTC LP2950
21 3
OUTPUT
GND
INPUT
TO-92 Plastic Package
Bottom View
BLOCK DIAGRAM
UNREGULATED
FROM CMOS
DC
OR TTL
SHUT
DOWN
OUTPUT
SENSE
GND
1
2
UTC
LP2951
3
4
8
7
6
5
INPUT
5V TAPSHUTDOWN
ERROR
FEEDBACK
SOP-8 OR DIP-8 PACKAGE
FOR UTC LP2951
FEEDBACK INPUT OUTPUT
182kΩ
ERROR
3
1.23
REF
60mV
AMPLIFIER
ERROR
DETECTION
COMPARATOR
FOR UTC LP2951
60kΩ
OUTPUT
NC
GND
1
2
UTC
LP2950
3
4
8
7
6
5
INPUT
NC
NCSHUTDOWN
ERROR
SOP-8 OR DIP-8 PACKAGE
FOR UTC LP2950
5V 1 5 0m A
187
SENSE
2
5V TAP
6
1.5 μF
ERROR
5
TO CMOS
GND
OR TTL
4
MAX.
330KΩ
UNISONIC TECHNOLOGIES CO., LTD 2 of 7
www.unisonic.com.tw QW-R102-001,J
Page 3
LP2950/2951 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 V
Operation Junction Temperature T
Storage Temperature T
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.
-0.3 ~ +30 V
SHDN
J
-65 ~ +150 °C
STG
-40 ~ +125 °C
ELECTRICAL CHARACTERISTICS (T
=25°C, VIN=6V, IL=100µA, CL=1µF, unless otherwise specified.)
J
For All Version:
PARAMETER SYMBOL TEST CONDITION MIN TYP MAX UNIT
Output Voltage V
Output Voltage V
Output Voltage Temperature
Coefficient
Line Regulation
Load Regulation
Dropout Voltage
OUT
OUT
TcVo
ΔV
ΔV
V
Ground Current IG
TJ=25°C (Note 1) V
-25°C≦T
≦+85°C(Note 1) V
J
100µA≦IL≦100mA, TJ≦TJ(max) V
OUT
OUT
D
6V≦V
100µA≦I
IL=100µA
I
I
I
≦30V 0.03 0.1 0.2 %
IN
≦100 mA 0.04 0.1 0.2 %
L
=100mA (Note 2)
L
=100µA
L
=100mA
L
×0.98 V
OUT
×0.98 V
OUT
×0.98 V
OUT
OUT VOUT
OUT VOUT
OUT VOUT
×1.02 V
×1.02 V
×1.02 V
20 100 ppm/°C
50
380
75
8
80
450
120
12
150
600
140
14
mV
µA
mA
Dropout Ground Current VIN=4.5V,IL=100µA 110 170 200 µA
I
Current Limit
Output Noise (10Hz ~ 100KHz)
(Bypass=0.01µF pins 7 to 1
(LP2951))
LIMIT
eN
=0 160 200 220 mA
V
OUT
C
=1µF
L
C
=200µF
L
C
=3.3µF
L
430
160
100
µV
For UTC LP2951 8-Pin Version Only
PARAMETER SYMBOL TEST CONDITION MIN TYP MAX UNIT
V
Reference Voltage
Reference Voltage
Feedback pin Bias Current IFB 20 40 nA
Reference Voltage Temperature
Coefficient
Feedback Bias Current
Temperature Coefficient
Error Comparator
Output Leakage Current I
Output Low Voltage VOL VIN=4.5V, IOL=400µA 250 mV
Threshold Voltage
Upper
Lower
Hysteresis
1.22 1.235 1.25 V
REF
V
Over temperature(Note 4) 1.19 1.27 V
REF
V
REF(TC)
I
FB(TC)
O(LEAK)
V
V
V
50 ppm/°C
0.1 nA/°C
VOH=30V 1 µA
(Note 3) 3.2 %VO
THU
(Note 3) 7.6 %VO
THL
(Note 3) 15 mV
HYS
UNISONIC TECHNOLOGIES CO., LTD 3 of 7
www.unisonic.com.tw QW-R102-001,J
Page 4
LP2950/2951 LINEAR INTEGRATED CIRCUIT
ELECTRICAL CHARACTERISTICS(Cont.)
For UTC LP2951 8-Pin Version Only
PARAMETER SYMBOL TEST CONDITION MIN TYP MAX UNIT
Shutdown Input
Input Logic Voltage
Shutdown Pin Input Current I
Regulator Output Current
Shutdown
Note 1:Additional conditions for 8-pin versions are FB pin tied to 5V
V
≤0.8V.
SHDN
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: V
REF≤VOUT
≤(VIN-1V), 2.3V≤VIN≤30V, 100µA≤IL≤100mA, TJ≤T
Low VIL Regulator ON 1.3 0.70
High VIH Regulator OFF 2.0
V
=2.4V 30 50 µA
SHDN
SHDN
V
=30V 450 600 µA
SHDN
V
≧2V, VIN≦30V, V
I
DFF
SHDN
Feedback pin tied to 5V Tap.
OUT
J(MAX)
=0
TAP
, Output tied to Sense(V
3 10 µA
OUT
V
=5V) and
UNISONIC TECHNOLOGIES CO., LTD 4 of 7
www.unisonic.com.tw QW-R102-001,J
Page 5
LP2950/2951 LINEAR INTEGRATED CIRCUIT
TYPICAL APPLICATION CIRCUIT
10 Ampere Low Dropout Regulator
CURRENT LIMIT
SECTION
+V
IN=Vou
t+0.5V
680Ω
0.05Ω
2N3906
470Ω
4.7MΩ
20kΩ
0.033µF
OUT
=1.23V*(1+R1/R2)
V
220 Ω
SD
3
8
+V
IN
ERROR
UTC LP2951
FB
Vout
GND
14
47Ω
10kΩ
5
R1
7
R2
For 5V output us e internal r es i s t or s.W ire pin 6 to 7 and wire pin 2 to +V
UTC
D65H0
1%
+
V
4.7µF
OUT
100m A
100µF
OUT
Fig.1
VIN VOUT
UTC LP2950-2.5
UTC LP2950-3.0
UTC LP2950-3.3
UTC LP2950-3.6
UTC LP2950-5.0
Fig.2
UNISONIC TECHNOLOGIES CO., LTD 5 of 7
www.unisonic.com.tw QW-R102-001,J
Page 6
LP2950/2951 LINEAR INTEGRATED CIRCUIT
TYPICAL CHARACTERISTICS
6
5
4
3
Output Voltage (V)
2
1
0
Dropout Char ac teristics
RL=50kΩ
1
34560
2
Input Voltage(V)
RL=50Ω
150
140
130
120
110
100
90
80
70
60
Input Current (mA)
50
40
30
20
10
0
0 1 2 3 4 5 6 7 8 9 10 11 12
Input Current
RL=50Ω
Input Voltage (V)
Ground P in C ur r ent
120
110
100
90
80
70
Quiescent Current (mA)
60
50
-75 -50 -25 0 25 50 75 100 125 150
600
500
400
300
VIN=6V
I
=100µA
L
Temperatur e (℃)
Dropout V ol tage
IL=100mA
Ground P in Cu r r ent
8
7
V IN=6V
=100mA
I
6
Quiescent Current (mA)
5
4
-75 -50 -25 0 25 50 75 100125 150
1.8
1.6
1.4
1.2
L
Temper ature (℃)
Shutdown Threshold V oltage
200
≈
Dropout Voltage (mV)
100
50
0
-75 -50 -25 0 25 50 75 100125 150
IL=100µA
Temperatur e (℃)
1.0
Shutdown Threshold Voltage ( V )
0.8
0.6
-75 -50 -25 0 25 50 75 100125 150
Temperatur e (℃)
UNISONIC TECHNOLOGIES CO., LTD 6 of 7
www.unisonic.com.tw QW-R102-001,J
Page 7
LP2950/2951 LINEAR INTEGRATED CIRCUIT
TYPICAL CHARACTERISTICS(Cont.)
Dropout Voltage
170
160
Short Circuit Current
500
400
150
140
130
Short Circuit Current (mA)
120
110
100
-75 -50 -25 0 25 50 75 100 125 150
Temperature (℃)
300
200
Dropout Voltage(mV)
100
0
0.1 1
TJ=25℃
Output Current(mA)
10
100
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 7 of 7
www.unisonic.com.tw QW-R102-001,J
Loading...