Datasheet

LP2986
www.ti.com SNVS137H –MARCH 1999–REVISED APRIL 2013
Electrical Characteristics (continued)
Limits in standard typeface are for T
J
= 25°C, and limits in boldface type apply over the full operating temperature range.
Unless otherwise specified: V
IN
= V
O
(NOM) + 1V, I
L
= 1 mA, C
OUT
= 4.7 µF, C
IN
= 2.2 µF, V
S/D
= 2V.
LM2986AI-X.X
(1)
LM2986I-X.X
(1)
Symbol Parameter Conditions Typical Units
Min Max Min Max
FEEDBACK PIN
V
FB
1.21 1.25 1.20 1.26
1.23
Feedback Pin Voltage 1.20 1.26 1.19 1.27 V
See
(5)
1.23 1.19 1.28 1.18 1.29
FB Pin Voltage
See
(6)
20 ppm/°C
Temperature Coefficient
I
FB
330 330
Feedback Pin Bias Current I
L
= 200 mA 150 nA
760 760
FB Pin Bias Current
See
(6)
0.1 nA/°C
Temperature Coefficient
SHUTDOWN INPUT
V
S/D
V
H
= O/P ON 1.4 1.6 1.6
S/D Input Voltage
(7)
V
V
L
= O/P OFF 0.55 0.18 0.18
I
S/D
V
S/D
= 0 0 −1 −1
S/D Input Current µA
V
S/D
= 5V 5 15 15
ERROR COMPARATOR
I
OH
1 1
Output “HIGH” Leakage V
OH
= 16V 0.01 µA
2 2
V
OL
220 220
V
IN
= V
O
(NOM) − 0.5V,
Output “LOW” Voltage 150 mV
I
O
(COMP) = 300 µA
350 350
V
THR
−5.5 −3.5 −5.5 −3.5
Upper Threshold Voltage −4.6
(MAX)
−7.7 −2.5 −7.7 −2.5
V
THR
−8.9 −4.9 −8.9 −4.9 %V
OUT
Lower Threshold Voltage −6.6
(MIN)
−13.0 −3.3 −13.0 −3.3
HYST Hysteresis 2.0
(5) V
FB
≤ V
OUT
≤ (V
IN
− 1), 2.5V ≤ V
IN
≤ 16V, 100 µA ≤ I
L
≤ 200 mA, T
J
≤ 125°C.
(6) Temperature coefficient is defined as the maximum (worst-case) change divided by the total temperature range.
(7) To prevent mis-operation, the Shutdown input must be driven by a signal that swings above V
H
and below V
L
with a slew rate not less
than 40 mV/µs (see Application Hints).
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