TL780 Datasheet, PDF (6/8 Pages) Texas Instruments – POSITIVE-VOLTAGE REGULATORS

TL780 SERIES
POSITIVE-VOLTAGE REGULATORS
SLVS055F – APRIL 1981 – REVISED DECEMBER 1999
electrical characteristics, V_I = 23 V, I_O = 500 mA, T_J = 25°C (unless otherwise noted)
PARAMETER
TEST CONDITIONS†
TL780-15Y
UNIT
MIN TYP MAX
Output voltage
Input voltage regulation
Output voltage regulation
Output resistance
IO = 5 mA to 1 A,
P ≤ 15 W
VI = 17.5 V to 30 V
VI = 20 V to 26 V
IO = 5 mA to 1.5 A
IO = 250 mA to 750 mA
f = 1 kHz
15
V
1.5
mV
1.5
7
mV
2.5
0.0035
W
Output noise voltage
f = 10 Hz to 100 kHz
225
µV
Dropout voltage
Input bias current
IO = 1 A
2
V
5.5
mA
Short-circuit output current
230
mA
Peak output current
2.2
A
† _{Pulse-testing techniques maintain the junction temperature as close to the ambient temperature as possible. Thermal effects must be taken into}
account separately. All characteristics are measured with a 0.33-µF capacitor across the input and a 0.22-µF capacitor across the output.
PARAMETER MEASUREMENT INFORMATION
INPUT
C1 = 0.33 µF
(see Note A)
I ^TL780 O
C
OUTPUT
(see Note C)
C2 = 0.22 µF
(see Note B)
NOTES: A. C1 is required when the regulator is far from the power-supply filter.
B. C2 is not required for stability; however, transient response is improved.
C. Permanent damage can occur when OUTPUT is pulled below ground.
Figure 1. Test Circuit
6
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