LND48XX
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 I
L
=5mA. For I
L
=100µA and T
J =
125ºC, line regulation is guaranteed by design to
0.2%. For LND4815 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: Group 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 the output voltage at a time T after a change in power dissipation, excluding load
or line regulation effects. Specifications are for a 200mA load pulse (3W pulse) for T=10ms.
Note 7: Vref <=Vout <=(Vin – 1V), 2.3V<=Vin <=26V,100µA <= I
L
<=400mA, T
J
<= T
jmax.
Note 8: Vshutdown >=2V, Vin <=26V, Vout =0v.
BLOCK DIAGRAM and TYPICAL APPLICATIONS
Unregulated DC
+
INPUT
OUTPUT
5V
<= 400mA
+
-
ERROR
AMPLIFIER
1
µ
F
+
+
6.8
µ
F
+
1.23 V
Reference
GROUND
Fig 1 : Fixed Regulator
Unregulated DC
7
+
FEEDBACK
INPUT
8
1
OUTPUT
R1
1
µ
F
Vout 1.2 --> 24 V
400mA Max
+
6.8
µ
F
+
-
From
CMOS
or
TTL
Off
On
R2
ERROR
AMPLIFIER
V
Ref
1.23V
3
SHUTDOWN
+
1.23 V
Reference
GROUND
V
=V
(1+ R1/R2)
OUT
REF
Fig 2 : Adjustable Regulator
•
Linear Dimensions, Inc.
•
445 East Ohio Street, Chicago IL 60611 USA
•
tel 312.321.1810
•
fax 312.321.1830
•
•
LINEAR_DIMENSIONS [ LINEAR DIMENSIONS SEMICONDUCTOR ]
