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LM78XX/LM78XXA Rev. 1.2
LM78XX/LM78XXA 3-Terminal 1A Positive Voltage Regulator
Electrical Characteristics (LM7809A) (Continued)
Refer to the test circuits. 0°C < TJ < 125°C, IO = 1A, VI = 15V, CI = 0.33µF, C O = 0.1µF, unless otherwise specified.
Notes:
25. Load and line regulation are specified at constant junction temperature. Changes in VO due to heating effects must
be taken into account separately. Pulse testing with low duty is used.
26. These parameters, although guaranteed, are not 100% tested in production.
Symbol Parameter Conditions Min. Typ. Max. Units
VOOutput Voltage TJ = +25°C 8.82 9.0 9.16 V
IO = 5mA to 1A, PO ≤ 15W,
VI = 11.2V to 24V
8.65 9.0 9.35
Regline Line Regulation(25) VI = 11.7V to 25V, IO = 500mA – 6.0 90.0 mV
VI = 12.5V to 19V – 4.0 45.0
TJ = +25°C VI = 11.5V to 24V – 6.0 90.0
VI = 12.5V to 19V – 2.0 45.0
Regload Load Regulation(25) TJ = +25°C, IO = 5mA to 1.5A – 12.0 100 mV
IO = 5mA to 1A – 12.0 100
IO = 250mA to 750mA – 5.0 50.0
IQQuiescent Current TJ = +25°C – 5.0 6.0 mA
∆IQQuiescent Current Change IO = 5mA to 1A – – 0.5 mA
VI = 12V to 25V, IO = 500mA – – 0.8
VI = 11.7V to 25V, TJ = +25°C – – 0.8
∆VO/∆TOutput Voltage Drift(26) IO = 5mA – -1.0 – mV/°C
VNOutput Noise Voltage f = 10Hz to 100kHz, T
A = +25°C – 10.0 – µV/VO
RR Ripple Rejection(26) f = 120Hz, IO = 500mA,
VI = 12V to 22V
– 62.0 – dB
VDROP Dropout Voltage IO = 1A, TJ = +25°C – 2.0 – V
rOOutput Resistance(26) f = 1kHz – 17.0 – mΩ
ISC Short Circuit Current VI = 35V, TA = +25°C – 250 – mA
IPK Peak Current(26) TJ = +25°C – 2.2 – A