Datasheet

LM2931, NCV2931 Series
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5
ELECTRICAL CHARACTERISTICS (V
in
= 14 V, I
O
= 10 mA, C
O
= 100 mF, C
O(ESR)
= 0.3 W, T
A
= 25°C [Note 7])
LM2931C/NCV2931C LM2931AC/NCV2931AC
Characteristic Symbol Min Typ Max Min Typ Max Unit
ADJUSTABLE OUTPUT
Reference Voltage (Note 8, Figure 18)
V
ref
V
I
O
= 10 mA, T
A
= 25°C 1.14 1.20 1.26 1.17 1.20 1.23
I
O
≤ 100 mA, T
A
= − 40 to +125°C 1.08 − 1.32 1.15 − 1.25
Output Voltage Range V
O range
3.0 to
24
2.7 to
29.5
− 3.0 to
24
2.7 to
29.5
− V
Line Regulation (V
in
= V
O
+ 0.6 V to 26 V) Reg
line
− 0.2 1.5 − 0.2 1.5 mV/V
Load Regulation (I
O
= 5.0 mA to 100 mA) Reg
load
− 0.3 1.0 − 0.3 1.0 %/V
Output Impedance Z
O
mW/V
I
O
= 10 mA, DI
O
= 1.0 mA, f = 10 Hz to 10 kHz
− 40 − − 40 −
Bias Current I
B
mA
I
O
= 100 mA − 6.0 − − 6.0 −
I
O
= 10 mA − 0.4 1.0 − 0.4 1.0
Output Inhibited (V
th(OI)
= 2.5 V) − 0.2 1.0 − 0.2 1.0
Adjustment Pin Current I
Adj
− 0.2 − − 0.2 −
mA
Output Noise Voltage (f = 10 Hz to 100 kHz) V
n
− 140 − − 140 −
mVrms/V
Long−Term Stability S − 0.4 − − 0.4 − %/kHR
Ripple Rejection (f = 120 Hz) RR 0.10 0.003 − 0.10 0.003 − %/V
Dropout Voltage V
I
−V
O
V
I
O
= 10 mA − 0.015 0.2 − 0.015 0.2
I
O
= 100 mA − 0.16 0.6 − 0.16 0.6
Over−Voltage Shutdown Threshold V
th(OV)
26 29.5 40 26 29.5 40 V
Output Voltage with Reverse Polarity Input
(V
in
= −15 V)
−V
O
−0.3 0 − −0.3 0 − V
Output Inhibit Threshold Voltages V
th(OI)
V
Output “On”: T
A
= 25°C − 2.15 1.90 − 2.15 1.90
T
A
= − 40° to +125°C − − 1.20 − − 1.20
Output “Off”: T
A
= 25°C 2.50 2.26 − 2.50 2.26 −
T
A
= − 40° to +125°C 3.25 − − 3.25 − −
Output Inhibit Threshold Current (V
th(OI)
= 2.5 V) I
th(OI)
− 30 50 − 30 50
mA
7. Low duty cycle pulse techniques are used during test to maintain junction temperature as close to ambient as possible.
8. The reference voltage on the adjustable device is measured from the output to the adjust pin across R
1
.