Datasheet

LM4121
SNVS073C –APRIL 2000–REVISED APRIL 2013 www.ti.com
Electrical Characteristics
LM4121-1.250V (continued)
Unless otherwise specified V
IN
= 3.3V, I
LOAD
= 0, C
OUT
= 0.01µF, T
A
= T
j
= 25°C. Limits with standard typeface are for T
j
=
25°C, and limits in boldface type apply over the −40°C ≤ T
A
≤ +85°C temperature range.
Symbol Parameter Conditions Min
(1)
Typ
(2)
Max
(1)
Units
ΔV
OUT
Long Term Stability 1000 hrs. @ 25°C 100 ppm
(4)
(4) Long term stability is change in V
REF
at 25°C measured continuously during 1000 hrs.
Electrical Characteristics
LM4121-ADJ
Unless otherwise specified V
IN
= 3.3V, V
OUT
= V
REF
, I
LOAD
= 0, C
OUT
= 0.01µF, T
A
= T
j
= 25°C. Limits with standard typeface
are for T
j
= 25°C, and limits in boldface type apply over the −40°C ≤ T
A
≤ +85°C temperature range.
Symbol Parameter Conditions Min
(1)
Typ
(2)
Max
(1)
Units
V
OUT
= V
REF
Output Voltage Initial
Accuracy 1.216 ±0.2
%
LM4121A-ADJ
LM4121-ADJ ±0.5
TCV
REF
/°C Temperature −40°C ≤ T
A
≤ +125°C 14 50 ppm/°c
Coefficient
ΔV
REF
/ΔV
IN
Line Regulation 1.8V ≤ V
IN
≤ 12V 0.0007 0.009
%/V
0.012
0 mA ≤ I
LOAD
≤ 1 mA 0.03 0.08
0.17
1 mA ≤ I
LOAD
≤ 5 mA 0.01 0.04
ΔV
OUT
/ΔI
LOAD
Load Regulation %/mA
0.1
−1 mA ≤ I
LOAD
≤ 0 mA 0.04 0.12
−5 mA ≤ I
LOAD
≤ −1 mA 0.01
Minimum Operating I
LOAD
= 5 mA 1.5 1.8 V
Min-V
IN
Voltage
V
N
Output Noise Voltage 0.1 Hz to 10 Hz 20 µV
PP
(3)
10 Hz to 10 kHz 30 µV
RMS
I
S
Supply Current 160 250 µA
275
I
SS
Power-down Supply V
IN
= 12V
Current Enable = 0.4V 1 µA
Enable = 0.2V 2
I
BIAS
Reference Pin Bias
(4)
15 40 nA
Current
V
H
Logic High Input 1.6 1.5 V
Voltage
V
L
Logic Low Input 0.4 V
Voltage
0.2
I
H
Logic High Input 7 15 µA
Current
I
L
Logic Low Input 0.1 µA
Current
V
OUT
= 0 15
6 30
I
SC
Short Circuit Current mA
V
IN
= 12V, V
OUT
= 0 17
6 30
(1) Limits are 100% production tested at 25°C. Limits over the operating temperature range are ensured through correlation using Statistical
Quality Control (SQC) methods. The limits are used to calculate TI's Averaging Outgoing Quality Level (AOQL).
(2) Typical numbers are at 25°C and represent the most likely parametric norm.
(3) Output noise for 1.25V option. Noise is proportional to V
OUT
.
(4) Bias Current flows out of the Adjust pin.
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