SIPEX LP2951CS-L-3-3/TR

LP2950/LP2951
Solved by
TM
100mA Low Dropout Voltage Regulators


•       
•    
•      
•      
•    
•    
•    µ  
•   Lead Free, RoHS Compliant Packages:
    
•    
•  
• 
•  
•  
•  
• 
•
• 
• 
• 
  
•      
•   
•      
Now Available in Lead Free Packaging
 
                  
                
                     
                  
        
                         
                    
              
   
UNREGULATED DC
8
INPUT
OUTPUT
7
+
FEEDBACK
5V @ 00mA
MAX
2
SENSE
FROM
CMOS OR
TTL
+
_
80kΩ
ERROR
AMPLIFIER
0kΩ
5V TAP
SHUTDOWN
0kΩ
0 mV
+
+
_
+ .2V
+
5
______
ERROR DETECTION
COMPARATOR
ERROR
µF
.
.
TO CMOS OR
TTL
REFERENCE
Mar8-07 Rev E
LP2950-51 Low Dropout Linear Regulator
GROUND
© 2007 Sipex Corporation

  
  
    
      
   
  
     
     
     
      
   
          



  
 
 
  
 
 
  
 ≤ ≤
  
 µ ≤ ≤ 
 ≤
  
 ≤ ≤
  
 µ ≤ ≤ 
 ≤


 



 





















































  
 
 
   





 
 ≤ ≤  





   
 µ ≤ ≤ 





 
 
   µ
   
   µ
   


















µ











 
 
 
 
 
  µ


µ 
  
   µ


µ 
   µ   
      


µ 
  
 
 
  

Mar8-07 Rev E
   


 













LP2950-51 Low Dropout Linear Regulator


© 2007 Sipex Corporation
LP2950/51
PARAMETER
CONDITIONS
(Note 2)
LP2951AC
Min. Typ.
Max.
8-Pin Versions only (Continued)
Reference Voltage
Temperature
Coefficient
Feedback Pin Bias
Current
Temperature
Coefficient
Error Comparator
Output Leakage
Current
Output Low Voltage
Upper Threshold
Voltage
Lower Threshold
Voltage
Hysteresis
Min.
LP2951C
Typ. Max.
UNITS
20
50
ppm/°C
0.1
0.1
nA/°C
VOH = 30V
0.01
1
0.01
1
μA
VIN= 4.5V
IOL= 400 μA
150
250
150
250
mV
(Note 7)
40
60
(Note 7)
75
(Note 7)
15
40
95
60
75
mV
95
15
mV
mV
Shutdown Input
Input logic Voltage
Shut down Pin Input
Current
Regulator Output
Current in Shutdown
Thermal
Resistance θJA
Low (Regulator ON)
High (Regulator OFF)
VS= 2.4V
VS= 30V
(Note 8)
8 Pin SOIC
3 Pin TO-92
2.0
1.3
0.7
30
675
3
50
800
10
2.0
1.3
0.7
30
675
3
50
800
10
V
V
μA
μA
μA
128. 4
°C/W
131.9
°C/W
Note 1: Output or reference voltage temperature coefficients defined as the worst case voltage change divided by the total temperature range.
Note 2: Unless otherwise specified all limits guaranteed for T J = 25°C, VIN= 6V, I L= 100 μA and CL = 1μF. Additional conditions for the 8-pin versions are feedback
tied to 5V tap and output tied to output sense (VOUT= 5V) and V SHUTDOWN ≤0.8V.
Note 3: Regulation is measured at constant junction temperature, using pulse testing with a low duty cycle. Changes i n output voltage due to heating effects are
covered under the specification for thermal regulation.
Note 4: Line regulation for the LP2951 is tested at IL= 1mA. For I L= 100 μA and TJ = 125°C, line regulation is guaranteed by design to 0.2%. See typical
performance characteristics for line regulation versus temperature and load current.
Note 5: Dropout voltage is defined as the input to output differential at which the output voltage drops 100 mV below its nominal value measured at 1V differential. At
very low values of programmed output voltage, the minimum input supply voltage of 2V (2.3V over temperature) must be taken into account.
Note 6: V REF ≤V OUT ≤(V IN- 1V), 2.3 ≤VIN≤30V, 100μA≤IL≤100mA, T J ≤T JMAX.
Note 7: Comparator thresholds are expressed in terms of a voltage differential at the feedback terminal below the nomi nal reference voltage measured at 6V input. To
express these thresholds in terms of output voltage change, multiply by the error amplifier gain = V OUT/VREF= (R 1+ R 2)/R2. For example, at a programmed output
voltage of 5V, the error output is guaranteed to go low when the output drops by 95 mV x 5V/1.235 = 384 mV. Thresholds remain constant as a percent of V OUTas V OUT
is varied, with the dropout warning occurring at typically 5% below nominal, 7.5% guaranteed.
Note 8: VSHUTDOWN ≥2V, V IN ≤30V, V OUT=0, Feedback pin tied to 5V Tap.
Note 9: All typical values are not guaranteed. The value could vary from lot to lot.
Mar8-07 Rev E
LP2950-51 Low Dropout Linear Regulator
© 2007 Sipex Corporation
 
  
225
R L=
3
R L =50kΩ
2
R L = 50k Ω
175
150
125
100
RL =
75
50
1
1
0.1
25
0
1
2
3
4
5
1
0
6
2
280
INPUT CURRENT (mA)
240
I L = 1mA
200
160
IL= 0
120
80
40
1
2
3
5
6 7
8
4
5
0.01
0.1
9 10
6
7
INPUT VOLTAGE (VOLTS)
100
16
R L =50 Ω
VOUT = 5V
12
V IN = 6V
I L = 100mA
8
4
0
1
2
3
4
5
6
7
8
9 10
-75 -50 -25
0
25 50 75 100 125 150
TEMPERATURE (ºC)
INPUT VOLTAGE (VOLTS)
Ground Current
10
Quiescent Current
160
150
140
130
120
110
100
90
80
70
60
50
40
30
20
10
0
8
1
LOAD CURRENT (mA)
Input Current
320
0
4
INPUT VOLTAGE (VOLTS)
Dropout Characteristics
0
3
GROUND CURRENT (mA)
0
INPUT VOLTAGE (VOLTS)
GROUND CURRENT (µA)
GROUND PIN CURRENT (mA)
4
8
INPUT CURRENT (µA)
200
8
OUTPUT VOLTAGE (VOLTS)
5
0
10
250
6
Ground Current
Input Current
16
190
12
10
QUIESCENT CURRENT (µA)
GROUND CURRENT (mA)
14
I L =100mA
8
6
4
2
0
0
1
2
3
4
5
6
7
8
170
V IN =6V
I L =100uA
150
130
-75 -50 -25
Ground Current
Mar8-07 Rev E
0
25 50 75 100 125 150
TEMPERATURE (ºC)
INPUT VOLTAGE
Quiescent Current
LP2950-51 Low Dropout Linear Regulator
© 2007 Sipex Corporation

   
170
500
600
I L = 100mA
100
~
~
50
I L = 100 µA
300
200
TJ = 25ºC
100
0
0
-75 -50 -25
0
SHORT CIRCUIT CURRENT (mA)
400
300
160
400
DROP-OUT VOLTAGE (mV)
100µA
25 50 75 100 125 150
1mA
TEMPERATURE (ºC)
10mA
120
110
2.5
T A = 125ºC
SINK CURRENT (mA)
2.0
4
HYSTERESIS
2
0
1.5
0
1
2
3
4
1.0
T A = -55ºC
0.0
5
RIPPLE REJECTION (dB)
I O = 1mA
I O = 100mA
1
0.5
V OUT = 5V
C L = 1 µF
0.2
0.1
0.05
1K
10K
FREQUENCY (Hz)
Output Impedance
Mar8-07 Rev E
200
80
80
70
70
IL= 0
60
50
I L = 100 µA
C L = 1 µF
V IN = 6V
V OUT = 5V
100K
1M
800
C L = 1µF
V IN = 6V
V OUT = 5V
I L = 1mA
60
50
40
30
20
10 1
600
Line Transient Response
90
40
400
TIME(µs)
20
100
6V
0
90
30
0.02
10
8V
4V
LP2951 Comparator Sink Current
IO = 100 µA
2
C L = 1 µF
I L = 1mA
V OUT = 5V
-50
mV ~
~
OUTPUT LOW VOLTAGE (V)
Error Comparator Output
5
0
0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9
INPUT VOLTAGE (V)
10
50
mV
T A = 25ºC
0.5
PULLUP RESISTOR TO
SEPARATE 5V SUPPLY
-2
25 50 75 100 125 150
100
mV
INPUT OUTPUT VOLTAGE
VOLTAGE CHANGE
6
0
Short Circuit Current
V OUT = 5V
COMPARATOR OUTPUT (V)
130
TEMPERATURE (ºC)
Drop-Out Voltage
8
OUTPUT IMPEDANCE (OHMS)
140
OUTPUT CURRENT
Drop-Out Voltage
0.01
150
110
-75 -50 -25
100mA
RIPPLE REJECTION (dB)
DROP-OUT VOLTAGE (mV)
500
10 2
10 3
10 4
10 5
FREQUENCY (Hz)
Ripple Rejection
10 6
I L = 10mA
10 1
10 2
10 3
10 5
10 4
10 6
FREQUENCY (Hz)
Ripple Rejection
LP2950-51 Low Dropout Linear Regulator
© 2007 Sipex Corporation

   
20
50
1.9
FEEDBACK CURRENT (µA)
2.1
0
-10
-20
-30
1.7
-75 -50 -25 0 25 50 75 100 125 150
40
100
20
100
~~
mA
0
-60
~
~
100
µA
100
µA
µA
0
1
2
3
4
5
Load Transient Response
4
8
12
TIME (ms)
16
80
Vout=5V
60
40
100
T A = 85 ºC
20
0
5
10
15
20
INPUT VOLTAGE (V)
LP2950 Maxium Rated Output
25
30
I L = 10mA
V IN = 8V
V OUT = 5V
C L= 10 µF
0
2
0
Enable Transient
8-PIN
MOLDED
DIP SOLDERED
TO PC BOARD
T JMAX = 125º C
V OUT = 5V
80
60
T A = 25ºC
40
T A = 50ºC
20
0
0
1
100
200
T A =25 ºC
2
TIME (us)
300
T JMAX = 125 ºC
3
120
PIN 2 TO PIN 4 RESISTANCE (kΩ)
100
4
-100 0 100 200 300 400 500 600 700
400
TO-92 PACKAGE
0.25" LEADS SOLDERED
TO PC BOARD
5
20
Load Transient Response
120
C L= 1 µF
-2
0
TIME (ms)
Mar8-07 Rev E
C L = 10 µF
V OUT = 5V
OUTPUT CURRENT (mA)
-100
SHUTDOWN OUTPUT
PINOUT VOLTAGE (V) VOLTAGE (V)
6
150
LOAD OUTPUT VOLTAGE
CURRENT CHANGE (mV)
LOAD OUTPUT VOLTAGE
CURRENT CHANGE (mV)
7
-40
1.0
LP2951 Feedback Pin Current
80
C L = 1 µF
V OUT = 5V
0.5
FEEDBACK VOLTAGE (V)
60
-20
0
-1.5 -1.0 -0.5
-2.0
250
-50
T A = 55ºC
-200
200
0
T A = 25ºC
-150
-250
LP2951 Feedback Bias Current
50
TA=1 25ºC
-100
TEMPEATURE (ºC)
100
OUTPUT CURRENT (mA)
-50
-75 -50 -25 0 25 50 75 100 125 150
TEMPERATURE
LP2951 Minimum Operating Voltage
PIN 7 DRIVEN BY EXTERNAL
SOURCE (REGULATOR RUN
OPEN LOOP)
0
10
BIAS CURRENT (nA)
MINIMUM OPERATING VOLTAGE (V)
2.3
T A = 85ºC
0
-75 -50 -25 0
25 50 75 100 125 150
TEMPERATURE (ºC)
LP2951 Divider Resistance
LP2950-51 Low Dropout Linear Regulator
0
5
10
15
20
INPUT VOLTAGE (V)
25
30
LP2950 Maxium Rated Output Current
© 2007 Sipex Corporation







 
  µ

 
 






 
   
 








   µ
   µ




 
 µ
 
 
 
    
 
 


    µ



    µ

    


  
   
    µ



 
  
    µ




         
   
   





    µ
    

   


    µ
   
   











 
 
  
 
Mar8-07 Rev E
 
 
 
 
 
 
LP2950-51 Low Dropout Linear Regulator
© 2007 Sipex Corporation

 
 
       µ  
        
         
     °    
          
°     Ω     
          
        
        
   
          
           
    µ   µ     
          
             µ 
           

          
         
           
             µ 
           
    Ω         

        
           
        
          
         µ 

     
           
                
           
             
            
    
           
            
           
        
          
            
        
              
             µ 
          
 
   ×    
           
       µ    
 Ω              
           
             
           
µ      µ      
       
          
         
           
          
           
µ

  
              
            
              
          
µ   µ      µ  µ 
           
           
    









 ≅   π × 

  µ        
  µ       
   µ  µ    
          
          
 
   
    
   
         
            
           
Mar8-07 Rev E
LP2950-51 Low Dropout Linear Regulator
© 2007 Sipex Corporation

 
+V IN
100K
8
+V IN
5 ______
ERROR
ERROR
OUTPUT
V OUT
1.24 to 2 9V
1
LP2951
SHUTDOWN
3
INPUT
+
R1
SD
GND
4
3.3µF
.01µF
FB
7
1.23V
R2
V REF
   
+V IN
470kΩ
+V IN
8
5 ______
470kΩ
ERROR
+V IN
V OUT
V OUT
1
8
3
RESET
SD
4
ERROR
OUTPUT
R1
GND
5 ______
ERROR
LP2951
+V IN
V OUT
+
LP2951
1µF
FB
SHUTDOWN
7
INPUT
3
SD
GND
4
R2
FB
7
*MINIMUM INPUT-OUTPUT VOLTAGE RANGES FROM 40mV to 400mV.
DEPENDING ON LOAD CURRENT. CURRENT LIMIT IS TYPICALLY 150mA
       
Mar8-07 Rev E
*V OUT = V IN
1
       
LP2950-51 Low Dropout Linear Regulator
© 2007 Sipex Corporation

  
+
6V
SEALED
LEADACID
BATTERY
SOURCE
1.5kΩ
120kΩ
8
1N457
FB
+V IN
SPX385
V OUT
1
MAIN V+
LP2951
SENSE
400kΩ
FOR 5.5 V
3
MEMORY V+
2
+
1µF
SD
100kΩ
GND
20kΩ
NI-CAD
BACKUP
BATTERY
4
    

Ω 



 







  





Ω 







Ω 
Ω 








Ω 

Ω 

Ω 




Ω 





 Ω 
 Ω 

            
 
          
      
Mar8-07 Rev E
LP2950-51 Low Dropout Linear Regulator
10
© 2007 Sipex Corporation

  
+V IN
8
AUX SHUTDOW
INPUT
0K Ω.
+V IN
_______ 5
ERROR
SD
OFF
.
LP295
ON
V OUT
GND
FB
+
TEMP
SENSOR
5 DEGREE SHUTDOWN FLAG
EXTERNAL CIRCUIT
PROTECTED FROM
OVER TEMPERATURE
(V+ GOES OFF WHEN
TEMP > 25)
7
AS5
-
OR
RELAY
8.2K Ω
     
+5V
UNREGULATED INPUT
.7mA
20mA
8
OUTPUT
8
+V IN
V OUT
N00
LP295
0.µF
FB
V OUT
7
2
N57
SENSE
V TAP
0KΩ
2N52
(2)
27KΩ
LP295
GND
IN
FB
GND
7
5V
2
OUTPUT
+
0K Ω
.7µF
LOAD
50mA
TO
00 mA
MIN VOLTAGE = V
         

Mar8-07 Rev E
     
LP2950-51 Low Dropout Linear Regulator
11
© 2007 Sipex Corporation
Package: 3 Pin TO-92
Mar8-07 Rev E
LP2950-51 Low Dropout Linear Regulator
12
© 2007 Sipex Corporation
Package: 8 Pin NSOIC
Mar8-07 Rev E
LP2950-51 Low Dropout Linear Regulator
13
© 2007 Sipex Corporation
ORDERING INFORMATION
Part Number
Accuracy
Output
Package Shipping Status
Voltage
LP2950ACN-L-3-3
0.50%
3.3V
Lead Free
3 Pin TO-92
LP2950ACN-L-3-3/TR
0.50%
3.3V
Lead Free
Tape & Reel
3 Pin TO-92
Active
LP2950ACN-L-5-0
0.50%
5.0V
Lead Free
3 Pin TO-92
Active
LP2950ACN-L-5-0/TR
0.50%
5.0V
Lead Free
Tape & Reel
3 Pin TO-92
Active
LP2950CN-L-3-3
1%
3.3V
Lead Free
3 Pin TO-92
Active
LP2950CN-L-3-3/TR
1%
3.3V
Lead Free
Tape & Reel
3 Pin TO-92
Active
LP2950CN-L-5-0
1%
5.0V
Lead Free
3 Pin TO-92
Active
LP2950CN-L-5-0/TR
1%
5.0V
Lead Free
Tape & Reel
3 Pin TO-92
Active
LP2951ACS-L-3-3
0.50%
3.3V
Lead Free
8 Pin SOIC
Active
LP2951ACS-L-3-3/TR
0.50%
3.3V
Lead Free
Tape & Reel
8 Pin SOIC
Active
LP2951ACS-L-5-0
0.50%
5.0V/ADJ
Lead Free
8 Pin SOIC
Active
LP2951ACS-L-5-0/TR
0.50%
5.0V/ADJ
Lead Free
Tape & Reel
8 Pin SOIC
Active
LP2951CS-L-3-3
1%
3.3V
Lead Free
8 Pin SOIC
Active
LP2951CS-L-3-3/TR
1%
3.3V
Lead Free
Tape & Reel
8 Pin SOIC
Active
LP2951CS-L-5-0
1%
5.0V/ADJ
Lead Free
8 Pin SOIC
Active
LP2951CS-L-5-0/TR
1%
5.0V/ADJ
Lead Free
Tape & Reel
8 Pin SOIC
Solved by
Bulk
Active
Bulk
Bulk
Bulk
Bulk
Bulk
Bulk
Bulk
Active
Sipex Corporation
TM
Headquarters and
Sales Office
233 South Hillview Drive
Milpitas, CA 95035
TEL: (408) 934-7500
FAX: (408) 935-7600
Sipex Corporation reserves the right to make changes to any products described herein. Sipex does not assume
any liability arising out of the application or use of any product or circuit described herein; neither does it convey
any license under its patent rights nor the rights of others.
Mar8-07 Rev E
LP2950-51 Low Dropout Linear Regulator
14
© 2007 Sipex Corporation
ORDERING INFORMATION
(continued)
Part Number
Accuracy
Output
Package Shipping Status
Voltage
LP2950ACN-3-3
0.50%
3.3V
3 Pin TO-92
Bulk
EOL
LP2950ACN-5-0
0.50%
5.0V
3 Pin TO-92
Bulk
EOL
LP2950CN-3-3
1%
3.3V
3 Pin TO-92
Bulk
EOL
LP2950CN-3-3/TR
1%
3.3V
3 Pin TO-92 Tape & Reel
EOL
LP2950CN-5-0
1%
5.0V
3 Pin TO-92
EOL
LP2950CN-5-0/TR
1%
5.0V
3 Pin TO-92 Tape & Reel
EOL
LP2951ACS-3-3
0.50%
3.3V
8 Pin SOIC
Bulk
EOL
LP2951ACS-5-0
0.50%
5.0V/ADJ 8 Pin SOIC
Bulk
EOL
Bulk
EOL
Bulk
LP2951CS-3-3
1%
3.3V
8 Pin SOIC
LP2951CS-3-3/TR
1%
3.3V
8 Pin SOIC Tape & Reel
LP2951CS-5-0
1%
5.0V/ADJ 8 Pin SOIC
LP2951CS-5-0/TR
1%
5.0V/ADJ 8 Pin SOIC Tape & Reel
Bulk
EOL
EOL
EOL
LP2950ACN-3-3/TR
0.50%
3.3V
3 Pin TO-92 Tape & Reel
OBS
LP2950ACN-5-0/TR
0.50%
5.0V
3 Pin TO-92 Tape & Reel
OBS
LP2951ACS-3-3/TR
0.50%
3.3V
8 Pin SOIC Tape & Reel
OBS
LP2951ACS-5-0/TR
0.50%
5.0V/ADJ 8 Pin SOIC Tape & Reel
OBS
Solved by
Sipex Corporation
TM
Headquarters and
Sales Office
233 South Hillview Drive
Milpitas, CA 95035
TEL: (408) 934-7500
FAX: (408) 935-7600
Sipex Corporation reserves the right to make changes to any products described herein. Sipex does not assume
any liability arising out of the application or use of any product or circuit described herein; neither does it convey
any license under its patent rights nor the rights of others.
Mar8-07 Rev E
LP2950-51 Low Dropout Linear Regulator
15
© 2007 Sipex Corporation