Datasheet

LM7905, LM7912, LM7915
www.ti.com SNOSBQ7C –JUNE 1999–REVISED MAY 2013
ELECTRICAL CHARACTERISTICS
Conditions unless otherwise noted: I
OUT
= 500mA, C
IN
= 2.2μF, C
OUT
= 1μF, 0°C ≤ T
J
≤ +125°C, Power Dissipation ≤ 1.5W.
Part Number LM7912C LM7915C Units
Output Voltage −12V −15V
Input Voltage (unless otherwise specified) −19V −23V
Symbol Parameter Conditions Min Typ Max Min Typ Max
V
O
Output Voltage T
J
= 25°C −11.5 −12.0 −12.5 −14.4 −15.0 −15.6 V
5mA ≤ I
OUT
≤ 1A, −11.4 −12.6 −14.25 −15.75 V
P ≤ 15W (−27 ≤ V
IN
≤ −14.5) (−30 ≤ V
IN
≤ −17.5) V
ΔV
O
Line Regulation T
J
= 25°C,
(1)
5 80 5 100 mV
(−30 ≤ V
IN
≤ −14.5) (−30 ≤ V
IN
≤ −17.5) V
3 30 3 50 mV
(−22 ≤ V
IN
≤ −16) (−26 ≤ V
IN
≤−20) V
ΔV
O
Load Regulation T
J
= 25°C,
(1)
5mA ≤ I
OUT
≤ 1.5A 15 200 15 200 mV
250mA ≤ I
OUT
≤ 750mA 5 75 5 75 mV
I
Q
Quiescent Current T
J
= 25°C 1.5 3 1.5 3 mA
ΔI
Q
Quiescent Current With Line 0.5 0.5 mA
Change (−30 ≤ V
IN
≤ −14.5) (−30 ≤V
IN
≤ −17.5) V
With Load, 5mA ≤ I
OUT
≤ 1A 0.5 0.5 mA
V
n
Output Noise Voltage T
A
= 25°C, 10Hz ≤ f ≤ 100Hz 300 375 μV
Ripple Rejection f = 120 Hz 54 70 54 70 dB
(−25 ≤ V
IN
≤ −15) (−30 ≤ V
IN
≤ −17.5) V
Dropout Voltage T
J
= 25°C, I
OUT
= 1A 1.1 1.1 V
I
OMAX
Peak Output Current T
J
= 25°C 2.2 2.2 A
Average Temperature I
OUT
= 5mA, −0.8 −1.0 mV/°C
Coefficient of 0 C ≤ T
J
≤ 100°C
Output Voltage
(1) Regulation is measured at a constant junction temperature by pulse testing with a low duty cycle. Changes in output voltage due to
heating effects must be taken into account.
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Product Folder Links: LM7905 LM7912 LM7915