AMS2954 Просмотр технического описания (PDF) - Advanced Monolithic Systems Inc
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AMS2954 Datasheet PDF : 15 Pages
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AMS2954
ELECTRICAL CHARACTERISTICS (Note 2) (Continued)
PARAMETER
Dropout Voltage
(Note 5)
Ground Current
Current Limit
Thermal Regulation
Output Noise,
10Hz to 100KHz
8-Pin Versions only
CONDITIONS
(Note 2)
IL = 100µ A
IL = 250 mA
IL = 100 µA
IL = 250 mA
Vout = 0
(Note 13)
CL = 1µF
CL = 200 µF
CL = 13.3 µF
(Bypass = 0.01 µF pins 7 to 1)
AMS2954AC
Min.
Typ.
50
380
Max.
80
600
75
120
15
20
200
500
0.05
0.2
430
160
100
AMS2954AC
AMS2954C
Min.
Typ.
50
380
Max.
80
600
75
120
15
20
200
500
0.05
0.2
430
160
100
AMS2954C
Units
mV
mV
µA
mA
mA
%/W
µV rms
µV rms
µV rms
Reference Voltage
Reference Voltage
Feedback Pin Bias Current
1.22
1.235
1.25
1.21
1.235
1.26
V
Over Temperature (Note 7)
1.19
1.27
1.185
1.285
V
40
60
40
60
nA
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 12 )
V = 30V
OH
Vin = 4.5V
IOL = 400µA
(Note 6)
(Note 6)
(Note 6)
Low (Regulator ON)
High (Regulator OFF)
Vs = 2.4V
Vs = 30V
(Note 11)
20
50
ppm/°C
0.1
0.1
nA/°C
0.01
1
150
250
0.01
1
µA
150
250
mV
40
60
40
60
mV
75
95
75
95
mV
15
15
mV
1.3
0.7
1.3
0.7
V
2
2
V
30
50
450
600
30
50
µA
450
600
µA
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 CL = 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 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, 100µA≤IL≤ 250 mA, TJ ≤ TJMAX.
Advanced Monolithic Systems, Inc. www.advanced-monolithic.com Phone (925) 443-0722 Fax (925) 443-0723
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