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LM3311SQX Folha de dados(PDF) 8 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
Nome de Peças LM3311SQX
Descrição Electrónicos  Step-Up PWM DC/DC Converter with Integrated LDO, Op-Amp, and Gate Pulse Modulation Switch
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Fabricante Electrônico  NSC [National Semiconductor (TI)]
Página de início  http://www.national.com
Logo NSC - National Semiconductor (TI)

LM3311SQX Folha de dados(HTML) 8 Page - National Semiconductor (TI)

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Electrical Characteristics
Specifications in standard type face are for T
J = 25˚C and those with boldface type apply over the full Operating Tempera-
ture Range (T
J = −40˚C to +125˚C). Unless otherwise specified VIN =LVIN =2.5V.
Low Dropout Linear Regulator (LDO)
Symbol
Parameter
Conditions
Min
(Note 5)
Typ
(Note 6)
Max
(Note 5)
Units
LV
IN
Input Voltage Range
2.5
7
V
V
ADJ
ADJ Pin Voltage
LV
IN = 3V and 7V
1.197
1.263
1.289
V
I
ADJ
ADJ Pin Current (Note 9)
28
380
nA
%V
ADJ/
∆V
IN
ADJ Voltage Line Regulation
LV
IN = 3V to 7V, LDOOUT =
2.8V, no load
-2.6
0.032
1.4
%
%V
ADJ/
∆I
L
LDO
OUT Load Regulation
I
OUT = 10mA to 300mA, LVIN
= 3.3V, LDO
OUT = 2.8V
-11.6
2.931
8
%
I
QL
LV
IN Quiescent Current
Device enabled
290
425
µA
Device shut down
10.5
V
DO
Dropout Voltage
350mA load, LDO
OUT = 2.8V
218
409
674
mV
V
ADJ(LOW)
V
ADJ Short Circuit Disable
Threshold
LV
IN = 3.3V
0.85
0.9
V
Note 1: Absolute maximum ratings are limits beyond which damage to the device may occur. Operating Ratings are conditions for which the device is intended to
be functional, but device parameter specifications may not be guaranteed. For guaranteed specifications and test conditions, see the Electrical Characteristics.
Note 2: Under normal operation the VC and CE pins may go to voltages above this value. The maximum rating is for the possibility of a voltage being applied to
the pin, however the VC and CE pins should never have a voltage directly applied to them.
Note 3: The maximum allowable power dissipation is a function of the maximum junction temperature, TJ(MAX), the junction-to-ambient thermal resistance, θJA,
and the ambient temperature, TA. See the Electrical Characteristics table for the thermal resistance of various layouts. The maximum allowable power dissipation
at any ambient temperature is calculated using: PD (MAX) = (TJ(MAX) −TA)/θJA. Exceeding the maximum allowable power dissipation will cause excessive die
temperature, and the regulator will go into thermal shutdown.
Note 4: The human body model is a 100pF capacitor discharged through a 1.5k
Ω resistor into each pin per JEDEC standard JESD22-A114.
Note 5: All limits guaranteed at room temperature (standard typeface) and at temperature extremes (bold typeface). All room temperature limits are 100%
production tested. All limits at temperature extremes are guaranteed via correlation using standard Statistical Quality Control (SQC) methods. All limits are used to
calculate Average Outgoing Quality Level (AOQL).
Note 6: Typical numbers are at 25˚C and represent the most likely norm.
Note 7: Duty cycle affects current limit due to ramp generator.
Note 8: Current limit at 0% duty cycle. See TYPICAL PERFORMANCE section for Switch Current Limit vs. VIN
Note 9: Bias current flows into pin.
www.national.com
8


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