Datasheet

R1
0.33 µF
Input Output
µA78xx
0.1 µF
I
O
R2
V
O
+ V
xx
)
ǒ
V
xx
R1
) I
Q
Ǔ
R2
A: The following formula is used when V
xx
is the nominal output voltage (output to common) of the fixed regulator:
OUTIN
G
−V
O
COM
+
−
V
I
I
L
µA78xx
+V
O
+V
0.1 µF0.33 µF
µA78xx
μA7800 SERIES
SLVS056O –MAY 1976–REVISED AUGUST 2012 www.ti.com
uA7824 Electrical Characteristics (continued)
at specified virtual junction temperature, V
I
= 33 V, I
O
= 500 mA (unless otherwise noted)
μA7824C
PARAMETER TEST CONDITIONS T
J
(1)
UNIT
MIN TYP MAX
I
O
= 5 mA to 1.5 A 12 480
Output voltage regulation 25°C mV
I
O
= 250 mA to 750 mA 4 240
Output resistance f = 1 kHz 0°C to 125°C 0.028 Ω
Temperature coefficient of output voltage I
O
= 5 mA 0°C to 125°C –1.5 mV/°C
Output noise voltage f = 10 Hz to 100 kHz 25°C 170 μV
Dropout voltage I
O
= 1 A 25°C 2 V
Bias current 25°C 4.6 8 mA
V
I
= 27 V to 38 V 1
Bias current change 0°C to 125°C mA
I
O
= 5 mA to 1 A 0.5
Short-circuit output current 25°C 150 mA
Peak output current 25°C 2.1 A
APPLICATION INFORMATION
Figure 2. Fixed-Output Regulator
Figure 3. Positive Regulator in Negative Configuration (V
I
Must Float)
Figure 4. Adjustable-Output Regulator
8 Submit Documentation Feedback Copyright © 1976–2012, Texas Instruments Incorporated