Datasheet
LM2990
www.ti.com
SNVS093D –JUNE 1999–REVISED APRIL 2013
Operating Ratings
(1)
Junction Temperature Range (T
J
) −40°C to +125°C
Maximum Input Voltage (Operational) −26V
(1) Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for
which the device is intended to be functional, but do not ensure specific performance limits. For ensured specifications and test
conditions, see the Electrical Characteristics.
Electrical Characteristics
V
IN
= −5V + V
O(NOM)
(1)
, I
O
= 1A, C
O
= 47 μF, unless otherwise specified. Boldface limits apply over the entire operating
temperature range, −40°C ≤ T
J
≤ 125°C, all other limits apply for T
J
= 25°C.
LM2990-5.0 LM2990-5.2
Units
Parameter Conditions
(Limit)
Typ
(2)
Limit
(3)
Typ
(2)
Limit
(3)
Output Voltage (V
O
) −4.90 −5.10 V (max)
5 mA ≤ I
O
≤ 1A
−5.10 −5.30 mV (min)
−5 −5.2 V
5 mA ≤ I
O
≤ 1A −4.75 −4.94 V (max)
−5.25 −5.46 V (min)
Line Regulation I
O
= 5 mA,
4 40 4 40 mV (max)
V
O(NOM)
−1V > V
IN
> −26V
Load Regulation 50 mA ≤ I
O
≤ 1A 1 40 1 40 mV (max)
Dropout Voltage I
O
= 0.1A, ΔV
O
≤ 100 mV 0.1 0.3 0.1 0.3 V (max)
I
O
= 1A, ΔV
O
≤ 100 mV 0.6 1 0.6 1 V (max)
Quiescent Current (I
q
) I
O
≤ 1A 1 5 1 5 mA (max)
I
O
= 1A, V
IN
= V
O(NOM)
9 50 9 50 mA (max)
Short Circuit Current R
L
= 1Ω
(4)
1.8 1.5 1.8 1.5 A (min)
Maximum Output Current See
(4)
1.8 1.5 1.8 1.5 A (min)
Ripple Rejection V
ripple
= 1 V
rms
,
58 50 58 50 dB (min)
ƒ
ripple
= 1 kHz, I
O
= 5 mA
Output Noise Voltage 10 Hz–100 kHz, I
O
= 5 mA 250 750 250 750 μV (max)
Long Term Stability 1000 Hours 2000 2000 ppm
(1) V
O(NOM)
is the nominal (typical) regulator output voltage, −5V, −5.2V, −12V or −15V.
(2) Typicals are at T
J
= 25°C and represent the most likely parametric norm.
(3) Limits are specified and 100% production tested.
(4) The short circuit current is less than the maximum output current with the −12V and −15V versions due to internal foldback current
limiting. The −5V and −5.2V versions, tested with a lower input voltage, does not reach the foldback current limit and therefore conducts
a higher short circuit current level. If the LM2990 output is pulled above ground, the maximum allowed current sunk back into the
LM2990 is 1.5A.
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