AMS2954
ELECTRICAL CHARACTERISTICS (Note 2) (Continued)
AMS2954AC
AMS2954C
PARAMETER
CONDITIONS
Units
Min.
Typ.
Max.
Min.
Typ.
Max.
80
(Note 2)
I
I
= 100m A
Dropout Voltage
(Note 5)
50
80
50
mV
mV
L
L
= 250 mA
380
600
380
600
I
I
= 100 mA
Ground Current
75
15
120
20
75
15
120
20
mA
L
L
= 250 mA
mA
Current Limit
V
= 0
200
500
0.2
200
500
0.2
mA
out
Thermal Regulation
(Note 13)
0.05
0.05
%/W
C
C
C
= 1mF
L
L
L
Output Noise,
430
160
100
430
160
100
mV rms
mV rms
mV rms
= 200 mF
= 13.3 mF
10Hz to 100KHz
(Bypass = 0.01 mF pins 7 to 1)
8-Pin Versions only
AMS2954AC
AMS2954C
Reference Voltage
Reference Voltage
1.22
1.235
1.25
1.21
1.235
1.26
V
V
Over Temperature (Note 7)
1.19
1.27
1.185
1.285
Feedback Pin Bias Current
40
20
60
40
60
nA
Reference Voltage Temperature
Coefficient
50
ppm/°C
( Note 12 )
Feedback Pin Bias Current
Temperature Coefficient
0.1
0.1
nA/°C
Error Comparator
Output Leakage Current
V
= 30V
0.01
150
1
0.01
150
1
mA
OH
V
I
= 4.5V
Output Low Voltage
in
250
250
mV
= 400mA
OL
(Note 6)
(Note 6)
(Note 6)
40
60
75
15
40
60
75
15
mV
mV
mV
Upper Threshold Voltage
Lower Threshold Voltage
95
95
Hysteresis
Shutdown Input
Low (Regulator ON)
High (Regulator OFF)
1.3
1.3
V
V
0.7
0.7
Input logic Voltage
2
2
Vs = 2.4V
30
50
30
50
mA
mA
Shutdown Pin Input Current
(Note 3)
V = 30V
s
450
600
450
600
Regulator Output Current in
Shutdown (Note 3)
(Note 11)
3
10
3
10
mA
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 VIN = ( VONOM +1)V, IL = 100 mA and CL = 1 mF for 5V versions and 2.2mF 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 TA = TJ =
25°C Additional conditions for the 8-pin versions are FEEDBACK tied to VTAP, OUTPUT tied to SENSE and VSHUTDOWN £ 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
VIN = ( VONOM +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 Vout as Vout is varied, with the dropout warning occurring at typically 5% below nominal, 7.5% guaranteed.
Note 7: Vref £Vout £ (Vin - 1V), 2.3 £Vin£30V, 100mA£IL£ 250 mA, TJ £ TJMAX
.
Advanced Monolithic Systems, Inc. 6680B Sierra Lane, Dublin, CA 94568 Phone (925) 556-9090 Fax (925) 556-9140
ADMOS [ ADVANCED MONOLITHIC SYSTEMS ]
