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AMS2954CS-30 Datasheet(PDF) 3 Page - Advanced Monolithic Systems

No. de pieza AMS2954CS-30
Descripción Electrónicos  250mA LOW DROPOUT VOLTAGE REGULATOR
Download  15 Pages
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Fabricante Electrónico  ADMOS [Advanced Monolithic Systems]
Página de inicio  http://www.advanced-monolithic.com
Logo ADMOS - Advanced Monolithic Systems

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Advanced Monolithic Systems, Inc.
6680B Sierra Lane, Dublin, CA 94568 Phone (925) 556-9090 Fax (925) 556-9140
AMS2954
ELECTRICAL CHARACTERISTICS (Note 2) (Continued)
PARAMETER
CONDITIONS
(Note 2)
AMS2954AC
Min.
Typ.
Max.
AMS2954C
Min.
Typ.
Max.
Units
Dropout Voltage
(Note 5)
IL = 100µ A
IL = 250 mA
50
380
80
600
50
380
80
600
mV
mV
Ground Current
IL = 100 µA
IL = 250 mA
75
15
120
20
75
15
120
20
µA
mA
Current Limit
Vout = 0
200
500
200
500
mA
Thermal Regulation
(Note 13)
0.05
0.2
0.05
0.2
%/W
Output Noise,
10Hz to 100KHz
CL = 1µF
CL = 200 µF
CL = 13.3 µF
(Bypass = 0.01
µF pins 7 to 1)
430
160
100
430
160
100
µV rms
µV rms
µV rms
8-Pin Versions only
AMS2954AC
AMS2954C
Reference Voltage
1.22
1.235
1.25
1.21
1.235
1.26
V
Reference Voltage
Over Temperature (Note 7)
1.19
1.27
1.185
1.285
V
Feedback Pin Bias Current
40
60
40
60
nA
Reference Voltage Temperature
Coefficient
( Note 12 )
20
50
ppm/°C
Feedback Pin Bias Current
Temperature Coefficient
0.1
0.1
nA/°C
Error Comparator
Output Leakage Current
V
OH
= 30V
0.01
1
0.01
1
µA
Output Low Voltage
Vin = 4.5V
IOL = 400µA
150
250
150
250
mV
Upper Threshold Voltage
(Note 6)
40
60
40
60
mV
Lower Threshold Voltage
(Note 6)
75
95
75
95
mV
Hysteresis
(Note 6)
15
15
mV
Shutdown Input
Input logic Voltage
Low (Regulator ON)
High (Regulator OFF)
2
1.3
0.7
2
1.3
0.7
V
V
Shutdown Pin Input Current
(Note 3)
Vs = 2.4V
Vs = 30V
30
450
50
600
30
450
50
600
µA
µA
Regulator Output Current in
Shutdown (Note 3)
(Note 11)
3
10
3
10
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 VIN = ( VONOM +1)V, IL = 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 TA = TJ =
25
°C Additional conditions for the 8-pin versions are FEEDBACK tied to V
TAP, 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
≤V
out
≤ (V
in - 1V), 2.3
≤V
in
≤30V, 100µA≤I
L
≤ 250 mA, T
J
≤ T
JMAX.


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