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LM140LAH-15/883 bảng dữ liệu(PDF) 2 Page - Texas Instruments

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Giải thích chi tiết về linh kiện  LM140LQML Series 3-Terminal Positive Regulators
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LM140LQML Series
3-Terminal Positive Regulators
General Description
The LM140L series of three terminal positive regulators is
available with several fixed output voltages making them
useful in a wide range of applications. The LM140LA is an
improved version of the LM78LXX series with a tighter out-
put voltage tolerance (specified over the full military tem-
perature range), higher ripple rejection, better regulation and
lower quiescent current. The LM140LA regulators have ±2%
V
OUT specification, 0.04%/V line regulation, and 0.01%/mA
load regulation. When used as a zener diode/resistor com-
bination replacement, the LM140LA usually results in an
effective output impedance improvement of two orders of
magnitude, and lower quiescent current. These regulators
can provide local on card regulation, eliminating the distribu-
tion problems associated with single point regulation. The
voltages available allow the LM140LA to be used in logic
systems, instrumentation, Hi-Fi, and other solid state elec-
tronic equipment. Although designed primarily as fixed volt-
age regulators, these devices can be used with external
components to obtain adjustable voltages and currents.
With adequate heat sinking the regulator can deliver 100 mA
output current. Current limiting is included to limit the peak
output current to a safe value. Safe area protection for the
output transistor is provided to limit internal power dissipa-
tion. If internal power dissipation becomes too high for the
heat sinking provided, the thermal shut-down circuit takes
over, preventing the IC from overheating.
Features
n
Line regulation of 0.04%/V
n
Load regulation of 0.01%/mA
n
Output voltage tolerances of ±2% at T
j = 25˚C and ±4%
over the temperature range
n
Output current of 100 mA
n
Internal thermal overload protection
n
Output transistor safe area protection
n
Internal short circuit current limit
Output Voltage Options
Device ID
Output Voltage
LM140LA-5.0
5V
LM140LA-12
12V
LM140LA-15
15V
Ordering Information
NS Part Number
JAN Part Number
NS Package Number
Package Description
LM140LAH-5.0/883
H03A
3LD T0–39 Metal Can
LM140LAH-12/883
H03A
3LD T0–39 Metal Can
LM140LAH-15/883
H03A
3LD T0–39 Metal Can
Connection Diagrams
TO-39 Metal Can Package (H)
20155302
Bottom View
See NS Package Number H03A
March 2006
© 2006 National Semiconductor Corporation
DS201553
www.national.com


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