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LM2853 Datasheet(PDF) 3 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor. Click here to check the latest version.
No. de pieza LM2853
Descripción Electrónicos  3A 550 kHz Synchronous SIMPLE SWITCHER Buck Regulator
Download  12 Pages
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Fabricante Electrónico  NSC [National Semiconductor (TI)]
Página de inicio  http://www.national.com
Logo NSC - National Semiconductor (TI)

LM2853 Datasheet(HTML) 3 Page - National Semiconductor (TI)

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Absolute Maximum Ratings (Note 1)
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
AVIN, PVIN, EN, SNS, SW, SS
−0.3V to 6.0V
ESD Susceptibility (Note 2)
2kV
Power Dissipation
Internally Limited
Storage Temperature Range
−65˚C to +150˚C
Maximum Junction Temp.
150˚C
14-Pin Exposed Pad TSSOP Package
Infrared (15 sec)
220˚C
Vapor Phase (60 sec)
215˚C
Soldering (10 sec)
260˚C
Operating Ratings (Note 1)
PVIN to GND
1.5V to 5.5V
AVIN to GND
3.0V to 5.5V
Junction Temperature
−40˚C to +125˚C
Electrical Characteristics Specifications with standard typeface are for T
J = 25˚C, and those in bold face
type apply over the full Junction Temperature Range (−40˚C to 125˚C). Minimum and Maximum limits are guaranteed through
test, design or statistical correlation. Typical values represent the most likely parametric norm at T
J = 25˚C and are provided
for reference purposes only. Unless otherwise specified AVIN = PVIN = 5V.
Symbol
Parameter
Conditions
Min
Typ
Max
Units
SYSTEM PARAMETERS
V
OUT
Voltage Tolerance (Note 3)
V
OUT = 0.8V option
0.782
0.8
0.818
V
V
OUT = 1.0V option
0.9775
1.0
1.0225
V
OUT = 1.2V option
1.1730
1.2
1.227
V
OUT = 1.5V option
1.4663
1.5
1.5337
V
OUT = 1.8V option
1.7595
1.8
1.8405
V
OUT = 2.5V option
2.4437
2.5
2.5563
V
OUT = 3.0V option
2.9325
3.0
3.0675
V
OUT = 3.3V option
3.2257
3.3
3.3743
∆V
OUT/
∆AVIN Line Regulation (Note 3)
V
OUT = 0.8V, 1.0V, 1.2V, 1.5V,
1.8V or 2.5V
3.0V
≤ AVIN ≤ 5.5V
0.2
1.1
%
V
OUT = 3.0V or 3.3V
3.5V
≤ AVIN ≤ 5.5V
0.2
1.1
%
∆V
OUT/
∆I
O
Load Regulation
Normal operation
2
mV/A
V
ON
UVLO Threshold (AVIN)
Rising
2.47
3.0
V
Falling Hysteresis
50
155
260
mV
R
DS(ON)-P
PFET On Resistance
Isw = 3A
40
120
m
R
DS(ON)-N
NFET On Resistance
Isw = 3A
32
100
m
R
SS
Soft-Start Resistance
450
k
I
CL
Peak Current Limit Threshold
3.6
5A
I
Q
Operating Current
Non-switching
0.85
2
mA
I
SD
Shutdown Quiescent Current
EN = 0V
12
50
µA
R
SNS
Sense Pin Resistance
432
k
PWM
f
osc
Switching Frequency
.
325
550
725
kHz
D
range
Duty Cycle Range
0
100
%
ENABLE CONTROL (Note 4)
V
IH
EN Pin Minimum High Input
75
%of
AVIN
V
IL
EN Pin Maximum Low Input
25
%of
AVIN
I
EN
EN Pin Pullup Current
EN = 0V
1.5
µA
www.national.com
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