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AS2951CS-5.0 Datasheet

  • AS2951CS-5.0

  • Analog IC

  • 12頁

  • ETC

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AS2950/AS2951
150mA Low Dropout Voltage Regulators
FEATURES
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5.0V, 3.3V, and 3.0V Versions at 150mA Output
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Very Low Quiescent Current
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Low Dropout Voltage
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Extremely Tight Load and Line Regulation
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Very Low Temperature Coefficient
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Needs Only 1碌F for Stability
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Current & Thermal Limiting
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Unregulated DC Input can Withstand -20V Reverse Battery
and +60V Positive Transients
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Similar Replacement With Higher I
OUT
for LP2950/LP2951 Sockets
APPLICATIONS
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Battery Powered Systems
鈥?/div>
Cordless Telephones
鈥?/div>
Radio Control Systems
鈥?/div>
Portable/Palm Top/Notebook Computers
鈥?/div>
Portable Consumer Equipment
鈥?/div>
Portable Instrumentation
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Avionics
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Automotive Electronics
鈥?/div>
SMPS Post-Regulator
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Voltage Reference
AS2951 Versions Only
鈥?/div>
Error Flag Warns of Output Dropout
鈥?/div>
Logic-Controlled Electronic Shutdown
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Output Programmable From 1.24V to 29V
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
AS2950ACN-X
AS2950CN-X
AS2951ACS-X
AS2951CS-X
X= Output Voltages (3.0V, 3.3V and 5.0V)
PIN CONNECTIONS
8-Pin Surface Mount
OUTPUT
SENSE
SHUTDOWN
GROUND
1
2
8
INPUT
FEEDBACK
5V or 3.3V TAP
ERROR
V
OUT
GND
V
IN
SOIC
8-PIN
OPER. TEMP.
RANGE
-40擄C to +125擄C
-40擄C to +125擄C
-40擄C to +125擄C
-40擄C to +125擄C
TO-92 (N)
1
2
3
ALPHA
7
AS2951
3
AS2930
6
4
5
Top View
Bottom View
Rev. 9/29/00

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