SPX2950ACN-3.3(2003) Просмотр технического описания (PDF) - Signal Processing Technologies
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SPX2950ACN-3.3 Datasheet PDF : 13 Pages
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ELECTRICAL CHARACTERISTICS: Continued
Electrical characteristics at VIN = VO+1V, IL=100µA, CL=1µF (note 2) TA=25°C, unless otherwise specified. Boldface applies over
the full operating temperature range.
PARAMETER
CONDITIONS
MIN TYP MAX MIN TYP MAX UNITS
Error Comparator
Output Leakage Current
Output Low Voltage
Upper Threshold Voltage
V0H=30V
VIN=VO-0.5V
I0L=400µA
(Note 7)
0.01 1
150 250
0.01
1
µA
150
250
mV
40
60
40
60
mV
Lower Threshold Voltage (Note 7)
75
95
75
95
mV
Hysteresis
(Note 7)
15
15
mV
Shutdown Input
Input Logic Voltage
Low (Regulator ON)
1.3 0.7
1.3
0.7
V
High (Regulator OFF)
2.0
2.0
V
Shutdown Pin Input Current VS=2.4V
VS=30V
30
50
400 800
30
50
µA
400
800
µA
Regulator Output Current (Note 8)
in Shutdown
3
10
3
10
µA
Note 1: Output or reference voltage temperature coefficients defined as the worst case voltage change divided by
the total temperature range.
Note 2: Unless otherwise specified all limits are guaranteed for TJ = 25°C, VIN = VO +1V, IL = 100µA and CL = 1µF.
Additional conditions for the 8-pin versions are feedback tied to 5V tap and output tied to output sense (VOUT = 5V)
and VSHUTDOWN ≤ 0.8V.
Note 3: Regulation is measured at constant junction temperature, using pulse testing with a low duty cycle. Changes
in output voltage
due to heating effects are covered under the specification for thermal regulation.
Note 4: Line regulation for the SPX2951 is tested at IL = 1mA. See typical performance characteristics for line
regulation versus temperature and load current.
Note 5: Dropout voltage is defined as the input to output differential at which the output voltage drops 100mV 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: VREF≤VOUT≤(VIN -1V),2.3≤VIN≤30V, 100µA≤IL≤150mA, TJ≤TJMAX.
Note 7: Comparator thresholds are expressed in terms of a voltage differential at the feedback terminal below the
nominal reference voltage measured at 6V input. 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 95mV x 5V/1.235 = 384mV. 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 8: VSHUTDOWN ≥ 2V, VIN ≤ 30V, VOUT = 0, Feedback pin tied to 5V/ 3.3V tap.
Rev. 3/6/03
SPX2950/SPX2951 150mA Low Dropout Voltage Regulator
3
©Copyright 2003 Sipex Corporation
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