LP2950AC Advanced Monolithic Systems, LP2950AC Datasheet - Page 3

• Manufacturer Part Number: LP2950AC
• Description: 100mA LOW DROPOUT VOLTAGE REGULATOR
• Manufacturer: Advanced Monolithic Systems

Output Noise,
10Hz to 100KHz
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)
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
Limits appearing in boldface type apply over the entire junction temperature range for operation. Limits appearing in normal type apply for T
Additional conditions for the 8-pin versions are FEEDBACK tied to V
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
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
Note 7: V
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
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. 6680B Sierra Lane, Dublin, CA 94568 Phone [phone] Fax [phone]
ELECTRICAL CHARACTERISTICS
IN
= ( V
PARAMETER
ONOM
ref
shutdown
V
+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,
out
out
as V
(V
2V, V
in
out
- 1V), 2.3 V
in
is varied, with the dropout warning occurring at typically 5% below nominal, 7.5% guaranteed.
30V, V
out
in
=0, Feedback pin tied to 5V
30V, 100 A I
C L = 1 F
C L = 200 F
C L = 13.3 F
(Bypass = 0.01 F pins 7 to
1(LP2951))
Over Temperature (Note 7)
( Note 12 )
V
V in = 4.5V
I OL = 400 A
(Note 6)
(Note 6)
(Note 6)
Low (Regulator ON)
High (Regulator OFF)
Vs = 2.4V
V s = 30V
(Note 11)
OH
= 30V
CONDITIONS
(Note 2)
L
100 mA, T
(Note 2) (Continued)
IN
= ( V
TAP
ONOM
TAP
J
.
, OUTPUT tied to SENSE and V
T
JMAX
+1)V, I
.
1.22
1.19
40
2
L
= 100 A and C
Min.
LP2950AC
LP2951AC
LP2951AC
1.235
40
20
0.1
0.01
150
60
75
15
1.3
30
450
3
Typ.
430
160
100
L
= 1 F for 5V versions and 2.2 F for 3V and 3.3V versions.
SHUTDOWN
Max.
1.25
1.27
60
1
250
95
0.7
50
600
10
0.8V.
LP2950/LP2951
1.21
1.185
40
2
Min.
LP2950C
LP2951C
1.235
40
0.01
150
60
75
15
1.3
30
450
3
LP2951C
Typ.
430
160
100
A
Max.
1.26
1.285
60
50
0.1
1
250
95
0.7
50
600
10
= T
J
= 25 C
ppm/°C
Units
nA/°C
V rms
V rms
V rms
mV
mV
mV
mV
nA
V
V
V
V
A
A
A
A