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PDF AS2950 Data sheet ( Hoja de datos )
| Número de pieza | AS2950 | |
| Descripción | (AS2950 / AS2951) 150mA Low Dropout Voltage Regulators | |
| Fabricantes | Sipex | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de AS2950 (archivo pdf) en la parte inferior de esta página. Total 12 Páginas | ||
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AS2950/AS2951
150mA Low Dropout Voltage Regulators
FEATURES
• 5.0V, 3.3V, and 3.0V Versions at 150mA Output
• Very Low Quiescent Current
• Low Dropout Voltage
• Extremely Tight Load and Line Regulation
• Very Low Temperature Coefficient
• Needs Only 1µF for Stability
• Current & Thermal Limiting
• Unregulated DC Input can Withstand -20V Reverse Battery
and +60V Positive Transients
• Similar Replacement With Higher IOUT for LP2950/LP2951 Sockets
AS2951 Versions Only
• Error Flag Warns of Output Dropout
• Logic-Controlled Electronic Shutdown
• Output Programmable From 1.24V to 29V
APPLICATIONS
• Battery Powered Systems
• Cordless Telephones
• Radio Control Systems
• Portable/Palm Top/Notebook Computers
• Portable Consumer Equipment
• Portable Instrumentation
• Avionics
• Automotive Electronics
• SMPS Post-Regulator
• Voltage Reference
PRODUCT DESCRIPTION
The AS2950 and AS2951 are low power voltage regulators. These devices are an excellent choice for use in battery-powered
applications such as cordless telephones, radio control systems, and portable computers. The AS2950 and AS2951 feature very low
quiescent current and very low dropout voltage (Typ. 50mV at light load and 380mV at 100mA). This include a tight initial tolerance
of 0.5% typ., extremely good load and line regulation of 0.05% typ. and very low output temperature coefficient, making the
AS2950/AS2951 useful as a low-power voltage reference. Other key additional features of this device includes higher output current
(150mA), positive transient protection up to 60V (Load dump), and the ability to survive an unregulated input voltage transient of -
20V below ground (reverse battery).
The error flag output feature is used as power-on reset for warning of a low output voltage, due to falling voltage input of batteries.
Another feature is the logic-compatible shutdown input which enables the regulator to be switched ON and OFF. The AS2950 is
offered in a 3-Pin TO-92 package compatible with other 5V regulators. The AS2951 is also available in 8-Pin Plastic, SO-8 and
TO-99 metal can packages.
The regulator output voltage may be pin-strapped for a 5V, 3.3V and 3.0V or programmed from 1.24V to 29V with an external pair of
resistors. Look for AS2954 for 250mA and AS2955 for 350mA.
ORDERING INFORMATION
TO-92
3-PIN
SOIC
8-PIN
OPER. TEMP.
RANGE
AS2950ACN-X
AS2950CN-X
AS2951ACS-X
AS2951CS-X
-40°C to +125°C
-40°C to +125°C
-40°C to +125°C
-40°C to +125°C
X= Output Voltages (3.0V, 3.3V and 5.0V)
PIN CONNECTIONS
8-Pin Surface Mount
OUTPUT
SENSE
SHUTDOWN
GROUND
18
2 ALPHA 7
3 AASS229935016
45
INPUT
FEEDBACK
5V or 3.3V TAP
ERROR
Top View
TO-92 (N)
12 3
VOUT
GND
Bottom View
VIN
Rev. 9/29/00
Free Datasheet http://www.datasheet4u.com/
1 page  
TYPICAL PERFORMANCE CHARACTERISTICS
DROPOUT CHARACTERISTICS
6
5
4
RL=50k Ω
3
RL=50k Ω
2
1
0
0 123 456
INPUT VOLTAGE (VOLTS)
INPUT CURRENT
250
225
200
175 RL = 50k Ω
150
125
100 RL =
75
50
25
0
01 2 3
10
INPUT VOLTAGE (VOLTS)
150
5.06
OUTPUT VOLTAGE VS. TEMP OF 3
REPRESENTATIVE UNITS
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 (ºC)
GROUND CURRENT
16
12
VIN = 6V
IL = 100mA
8
4
-75 -50 -25 0 25 50 75 100 125 150
TEMPERATURE (ºC)
GROUND CURRENT
320
280
240
200 IL= 1mA
160
IL= 0
120
80
40
0
0 1 2 34 56 7 8
INPUT VOLTAGE (VOLTS)
GROUND CURRENT
16
14
12
IL=100mA
10
8
6
4
2
0
012345678
INPUT VOLTAGE
DROP-OUT VOLTAGE
600
IL = 100mA
500
400
300
~~
100
50 IL = 100µA
0
-75 -50 -25 0 25 50 75 100 125 150
TEMPERATURE (ºC)
DROP-OUT VOLTAGE
500
400
300
200
TJ = 25ºC
100
0
100µA
1mA
10mA
OUTPUT CURRENT
100mA
AS2950/2951
QUIESCENT CURRENT
10
1
0.1
0.01
0.1
1 10
LOAD CURRENT (mA)
150
160
150
140
130
120
110
100
90
80
70
60
50
40
30
20
10
0
0
INPUT CURRENT
RL=50Ω
1 2 3 4 5 6 7 8 9 10
INPUT VOLTAGE (VOLTS)
QUIESCENT CURRENT
240
220
VIN =6V
IL=100mA
200
180
-75 -50 -25 0 25 50 75 100 125 150
TEMPERATURE (ºC)
SHORT CIRCUIT CURRENT
170
160
150
140
130
120
110
110
-75 -50 -25 0 25 50 75 100 125 150
TEMPERATURE (ºC)
Rev. 9/29/00
Free Datasheet http://www.datasheet4u.com/
5 Page 
TYPICAL APPLICATIONS (continued)
AS2950/AS2951
+VIN
AUX SHUTDOW
INPUT
ON
OFF
3 SD
8
+VIN
_______ 5
ERROR
10KΩ ..
5 DEGREE SHUTDOWN
FLAG
2951
1
VOUT
+
TEMP
SENSOR
AS35
-
GND
4
FB
7
8.2KΩ ..
EXTERNAL CIRCUIT
PROTECTED
FORVOEMR
T(VE+MGPOEERSATOUFRFE
WTEHMEPN> 125)
System Over Temperature Protection Circuit
OR
RELAY
4 20mA
1N4001
0.1uF
8
+VIN
1
VOUT
2951
7
FB
+5V
4.7mA
OUTPUT
2
GND
4
1N457
360KΩ ..
MIN VOLTAGE = 4V
Open Circuit Detector for 4mA to 20mA Current Loop
UNREGULATED INPUT
5
IN
1
VOUT
2951
3
VTAP
FB
7
2
SENSE
GND
4
330KΩ ..
27KΩ ..
+
4.7uF
2N5432
5V
OUTPUT
LOAD
50mA
TO
300 mA
300 mA Regulator with 0.75 Dropout
Rev. 9/29/00
Free Datasheet http://www.datasheet4u.com/
11 Page | ||
| Páginas | Total 12 Páginas | |
| PDF Descargar | [ Datasheet AS2950.PDF ] | |
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