LP2950/LP2951
ELECTRICAL CHARACTERISTICS
(Note 2) (Continued)
PARAMETER
Output Noise,
10Hz to 100KHz
CONDITIONS
(Note 2)
CL = 1µF
CL = 200
µF
CL = 13.3
µF
(Bypass = 0.01
µF
pins 7 to
1(LP2951))
Min.
LP2950AC
LP2951AC
Typ.
430
160
100
LP2951AC
1.22
1.235
1.25
1.27
40
20
60
1.21
1.185
Max.
Min.
LP2950C
LP2951C
Typ.
430
160
100
LP2951C
1.235
1.26
1.285
40
60
50
Max.
Units
µV
rms
µV
rms
µV
rms
8-Pin Versions only
Reference Voltage
Reference Voltage
Feedback Pin Bias Current
Reference Voltage Temperature
Coefficient
Feedback Pin Bias Current
Temperature Coefficient
Error Comparator
Output Leakage Current
Output Low Voltage
Upper Threshold Voltage
Lower Threshold Voltage
Hysteresis
Shutdown Input
Input logic Voltage
Shutdown Pin Input Current
(Note 3)
Regulator Output Current in
Shutdown (Note 3)
V
OH
V
V
nA
ppm/°C
Over Temperature (Note 7)
1.19
( Note 12 )
0.1
0.1
nA/°C
= 30V
0.01
150
40
60
75
15
1
250
40
95
0.01
150
60
75
15
1
250
µA
mV
mV
Vin = 4.5V
IOL = 400µA
(Note 6)
(Note 6)
(Note 6)
Low (Regulator ON)
High (Regulator OFF)
Vs = 2.4V
Vs = 30V
(Note 11)
95
mV
mV
1.3
2
30
450
3
0.7
2
50
600
10
1.3
30
450
3
0.7
50
600
10
V
V
µA
µA
µA
Note 1:
Absolute Maximum Ratings are limits beyond which damage to the device may occur. Operating Ratings are conditions under which operation of the
device is guaranteed. Operating Ratings do not imply guaranteed performance limits. For guaranteed performance limits and associated test conditions, see the
Electrical Characteristics tables.
Note 2:
Unless otherwise specified all limits guaranteed for V
IN
= ( V
ONOM
+1)V, I
L
= 100
µA
and C
L
= 1
µF
for 5V versions and 2.2µF for 3V and 3.3V
versions. Limits appearing in
boldface
type apply over the entire junction temperature range for operation. Limits appearing in normal type apply for T
A
= T
J
=
25°C Additional conditions for the 8-pin versions are FEEDBACK tied to V
TAP
, OUTPUT tied to SENSE and V
SHUTDOWN
≤
0.8V.
Note 3:
Guaranteed and 100% production tested.
Note 4:
Guaranteed but not 100% production tested. These limits are not used to calculate outgoing AQL levels.
Note 5:
Dropout voltage is defined as the input to output differential at which the output voltage drops 100 mV below its nominal value measured at 1V
differential. At very low values of programmed output voltage, the minimum input supply voltage of 2V ( 2.3V over temperature) must be taken into account.
Note 6:
Comparator thresholds are expressed in terms of a voltage differential at the feedback terminal below the nominal reference voltage measured at
V
IN
= ( V
ONOM
+1)V. To express these thresholds in terms of output voltage change, multiply by the error amplifier gain = Vout/Vref = (R1 + R2)/R2. For
example, at a programmed output voltage of 5V, the error output is guaranteed to go low when the output drops by 95 mV x 5V/1.235 = 384 mV. Thresholds
remain constant as a percent of V
out
as V
out
is varied, with the dropout warning occurring at typically 5% below nominal, 7.5% guaranteed.
Note 7:
V
ref
≤V
out
≤
(V
in
- 1V), 2.3
≤V
in
≤30V,
100µA≤I
L
≤
100 mA, T
J
≤
T
JMAX
.
Note 8:
The junction-to-ambient thermal resistance are as follows:180°C/W and 160°C/W for the TO-92 (N) package with 0.40 inch and 0.25 inch leads to the
printed circuit board (PCB) respectively, 105°C/W for the molded plastic DIP (P) and 160°C/W for the molded plastic SO-8 (S). The above thermal resistances
for the N, S and P packages apply when the package is soldered directly to the PCB.
Note 9:
May exceed input supply voltage.
Note 10:
When used in dual-supply systems where the output terminal sees loads returned to a negative supply, the output voltage should be diode-clamped to
ground.
Note 11:
V
shutdown
≥
2V, V
in
≤
30V, V
out
=0, Feedback pin tied to 5V
TAP
.
Note 12:
Output or reference voltage temperature coefficients defined as the worst case voltage change divided by the total temperature range.
Advanced Monolithic Systems, Inc.
www.advanced-monolithic.com
Phone (925) 443-0722
Fax (925) 443-0723
ADMOS [ ADVANCED MONOLITHIC SYSTEMS ]
