LND2931 View Datasheet(PDF) - Linear Dimensions Semiconductor
Part Name
Description
Manufacturer
LND2931 Datasheet PDF : 5 Pages
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LND2931
Note 1: Output or reference voltage temperature coefficients defined as the worst case voltage change
divided by the total temperature range.
Note 2: Regulations are measured at constant junction temperature, using pulse testing with a low duty
cycle. Changes in output voltage due to heating effects are covered under the specification for thermal
regulation.
Note 3: Line regulation is tested at 150ºC for IL = 1mA, for IL=100µA and TJ =125ºC, line regulation is
guaranteed by design to 0.2%. For LND2931-15 16V<= Vin <=26V.
Note 4: Dropout voltage is defined as the input to output differential at which the output voltage drops 2%
below its nominal value measured at 1V differential.
Note 5: Ground pin current is the regulator quiescent current. The total current drawn from the source is
the sum of the ground pin current and output load current.
Note 6: Thermal regulation is the change in output voltage at a time T after a change in power dissipation,
excluding load or line regulation effects. Specifications are for a 50mA load pulse (1.25W pulse) for
T=10ms.
Note7: Vref ≤ Vout ≤ (Vin-1V), 2.3V≤Vin ≤ 26V, 100µA ≤IL ≤ 100mA, TJ ≤ Tjmax.
Note 8: Vshutdown ≥ 2V, VIN ≤ 26V, Vout =0V.
BLOCK DIAGRAM AND TYPICAL APPLICATIONS
Figure 1: Fixed Regulator
Unregulated DC
+
INPUT
OUTPUT
+
60k
-
ERROR
AMPLIFIER
5V
IL <= 100mA
+ See
Application
Hints
+
1.23 V
Reference
182k
GROUND
Figure 2:Adjustable Regulator
Unregulated DC
7
8
1
+
FEEDBACK
INPUT
OUTPUT
R1
0.01 µF
Vout 1.2A->24A
IL <= 100mA
From
CMOS
or
TTL
5
SHUTDOWN
+
-
ERROR
AMPLIFIER
60k
+
1.23 V
Reference
R2
2,3,6,7
GROUND
+ 3.3 µF
• Linear Dimensions, Inc. • 445 East Ohio Street, Chicago IL 60611 USA • tel 312.321.1810 • fax 312.321.1830 • www.lineardimensions.com •
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