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PDF LP2950 Data sheet ( Hoja de datos )
| Número de pieza | LP2950 | |
| Descripción | 100mA LOW DROPOUT VOLTAGE REGULATOR | |
| Fabricantes | Advanced Monolithic Systems | |
| Logotipo |  |
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 1. PDF - Adjustable Voltage Regulator  Hay una vista previa y un enlace de descarga de LP2950 (archivo pdf) en la parte inferior de esta página. Total 14 Páginas | ||
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Advanced
Monolithic
Systems
LP2950/LP2951
100mA LOW DROPOUT VOLTAGE REGULATOR
FEATURES
• 5V, 3.3V, and 3V Versions at 100mA Output Current
• High Accuracy Output Voltage
• Extremely Low Quiescent Current
• Low Dropout Voltage
• Extremely Tight Load and Line Regulation
• Very Low Temperature Coefficient
• Current and Thermal Limiting
• Needs Minimum Capacitance (1µF) for Stability
• Unregulated DC Positive Transients 60V
ADDITIONAL FEATURES (LP2951 ONLY)
• 1.24V to 29V Programmable Output
• Error Flag Warning of Voltage Output Dropout
• Logic Controlled Electronic Shutdown
APPLICATIONS
• Battery Powered Systems
• Portable Consumer Equipment
• Cordless Telephones
• Portable (Notebook) Computers
• Portable Instrumentation
• Radio Control Systems
• Automotive Electronics
• Avionics
• Low-Power Voltage Reference
GENERAL DESCRIPTION
The LP2950 and LP2951 are micropower voltage regulators ideally suited for use in battery-powered systems. These devices
feature very low quiescent current (typ.75µA), and very low dropout voltage (typ.45mV at light loads and 380mV at 100mA)
thus prolonging battery life. The quiescent current increases only slightly in dropout. The LP2950/LP2951 has positive
transient protection up to 60V and can survive unregulated input transient up to 20V below ground.
The LP2950 and LP2951 were designed to include a tight initial tolerance (typ. 0.5%), excellent load and line regulation (typ.
0.05%), and a very low output voltage temperature coefficient, making these devices useful as a low-power voltage reference.
The LP2950 is offered in the 3-pin TO-92 package. LP2951 is available in 8-pin plastic SOIC and DIP packages and offers
three major additional system features. An error flag output warns of a low output voltage, often due to failing batteries on
input. The LP2951 also features the logic-compatible shutdown input which enables the regulator to be switched on and off.
The LP2951 device may be pin-strapped for a 5V, 3.3V, or 3V output, or programmed from 1.24V to 29V with an external
pair of resistors.
ORDERING INFORMATION
PACKAGE TYPE
TO-92
8 LEAD PDIP 8 LEAD SOIC
LP2950ACN-X LP2951ACP-X LP2951ACS-X
LP2950CN-X LP2951CP-X LP2951CS-X
X = 3.3V, or 3V
OPERATING
TEMP. RANGE
IND.
IND
PIN CONNECTION
8L SOIC/ 8L PDIP
OUTPUT 1
SENSE 2
SHUTDOWN 3
GROUND 4
8 INPUT
7 FEEDBACK
6 VTAP
5 ERROR
Top View
OUTPUT
TO-92
INPUT
GND
Bottom View
Advanced Monolithic Systems, Inc. 6680B Sierra Lane, Dublin, CA 94568 Phone (925) 556-9090 Fax (925) 556-9140
1 page  
TYPICAL PERFORMANCE CHARACTERISTICS
LP2950/LP2951
Quiescent Current
10
1
0.1
0.01
0.1
1 10 100
LOAD CURRENT (mA)
Dropout Characteristics
6
5V OUTPUT
5
4 RL= 50 kΩ
3
RL= 50Ω
2
1
0
0 1 234 5
INPUT VOLTAGE (V)
6
Input Current
250
225 5V OUTPUT
200 RL= 50 kΩ
175
150
125
100 RL= ∞
75
50
25
0
0 1 2 3 4 5 6 7 8 9 10
INPUT VOLTAGE (V)
Input Current
120
110 5V OUTPUT
100
RL= 50Ω
90
80
70
60
50
40
30
20
10
0
0 1 2 3 4 5 6 7 8 9 10
INPUT VOLTAGE (V)
Temperature Drift of 3
Representative Units
5.06
5V OUTPUT
5.04
5.02
5.0
4.98
4.96
0.2%
4.94
-75 -50 -25 0 25 50 75 100 125 150
TEMPERATURE (° C)
Quiescent Current
160
5V OUTPUT
140
120
100 IL= 1 mA
80
IL= 0
60
40
20
0
01 234567
INPUT VOLTAGE (V)
8
Quiescent Current
120
5V OUTPUT
110
100
IL= 100µA
VIN= 6V
90
80
70
60
50
-75 -50 -25 0 25 50 75 100 125 150
TEMPERATURE (° C)
Quiescent Current
10
5V OUTPUT
9
VIN= 6V
IL= 100mA
8
7
-75 -50 -25 0 25 50 75 100 125 150
TEMPERATURE (° C)
Quiescent Current
8
5V OUTPUT
7
6
5
IL= 100mA
4
3
2
1
0
01 234567
INPUT VOLTAGE (V)
8
Advanced Monolithic Systems, Inc. 6680B Sierra Lane, Dublin, CA 94568 Phone (925) 556-9090 Fax (925) 556-9140
5 Page 
TYPICAL APPLICATIONS (Continued)
Low Drift Current Source
+V = 2 30V
IL LOAD
8
VIN
VOUT 1
SHUTDOWN
INPUT
3
SD
LP2951
GND
FB
47
R
1%
1µF +
0.1µF
LP2950/LP2951
5Volt Current Limiter
5V BUS
+VIN
LP2950 -5.0
VOUT
*VOUT ≈ 5V
GND
1µF
*Minimum Input-Output voltage ranges from 40mV to 400mV, depending on load
current. Current limit is typically 160 mA
5V Regulator with 2.5V Sleep Function
*SLEEP
INPUT
+VIN
C - MOS
GATE
47kΩ
8
ERROR
OUPUT
+VIN
5 ERROR
VOUT 1
SHUTDOWN
INPUT
3
SD
LP2951
GND
FB
47
470kΩ
+VOUT
100pF
200kΩ
2N3906
1% +
100kΩ
3.3µF
1%
100kΩ
Open Circuit Detector for 4 to 20mA Current Loop
4 20mA
1N4001
0.1µF
8
+VIN
VOUT 1
LP2951
7
FB
GND
4
1N457
+5V
4.7kΩ
1
*OUTPUT
5
4
2
360
MIN. VOLTAGE ≈ 4V
Advanced Monolithic Systems, Inc. 6680B Sierra Lane, Dublin, CA 94568 Phone (925) 556-9090 Fax (925) 556-9140
11 Page | ||
| Páginas | Total 14 Páginas | |
| PDF Descargar | [ Datasheet LP2950.PDF ] | |
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