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LM3311SQX Datenblatt(PDF) 6 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
Teilenummer LM3311SQX
Bauteilbeschribung  Step-Up PWM DC/DC Converter with Integrated LDO, Op-Amp, and Gate Pulse Modulation Switch
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Hersteller  NSC [National Semiconductor (TI)]
Direct Link  http://www.national.com
Logo NSC - National Semiconductor (TI)

LM3311SQX Datenblatt(HTML) 6 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.
V
IN
7.5V
SW Voltage
21V
FB Voltage
V
IN
V
C Voltage (Note 2)
1.265V ± 0.3V
SHDN Voltage
7.5V
FREQ
V
IN
AV
IN
12V
Amplifier Inputs/Output
Rail-to-Rail
LV
IN
7.5V
ADJ Voltage
LV
IN
V
OUT
LV
IN
VGH Voltage
31V
VGHM Voltage
VGH
VFLK, VDPM, V
DD Voltage
7.5V
CE Voltage (Note 2)
1.265 + 0.3V
RE Voltage
VGH
Maximum Junction
Temperature
150˚C
Power Dissipation(Note 3)
Internally Limited
Lead Temperature
300˚C
Vapor Phase (60 sec.)
215˚C
Infrared (15 sec.)
220˚C
ESD Susceptibility (Note 4)
Human Body Model
2kV
Operating Conditions
Operating Junction
Temperature Range (Note 5)
−40˚C to +125˚C
Storage Temperature
−65˚C to +150˚C
Supply Voltage
2.5V to 7V
Maximum SW Voltage
20V
VGH Voltage Range
5V to 30V
Op-Amp Supply, AV
IN
4V to 12V
LDO Supply, LV
IN
2.5V to 7V
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 and IL = 0A.
Symbol
Parameter
Conditions
Min
(Note 5)
Typ
(Note 6)
Max
(Note 5)
Units
I
Q
Quiescent Current
FB = 2V (Not Switching)
690
1100
µA
V
SHDN =0V
0.04
0.5
8.5
660kHz Switching
2.1
2.8
mA
1.28MHz Switching
3.1
4.0
V
FB
Feedback Voltage
1.231
1.263
1.287
V
%V
FB/
∆V
IN
Feedback Voltage Line
Regulation
2.5V
≤ V
IN
≤ 7V
-0.26
0.089
0.42
%/V
I
CL
Switch Current Limit (Note 7) (Note 8)
2.0
2.6
A
I
B
FB Pin Bias Current (Note 9)
27
160
nA
I
SS
SS Pin Current
8.5
11
13.5
µA
V
SS
SS Pin Voltage
1.20
1.24
1.28
V
V
IN
Input Voltage Range
2.5
7
V
g
m
Error Amp Transconductance
∆I = 5µA
26
74
133
µmho
A
V
Error Amp Voltage Gain
69
V/V
D
MAX
Maximum Duty Cycle
f
S = 660kHz
80
91
%
f
S = 1.28MHz
80
89
f
S
Switching Frequency
FREQ = Ground
440
660
760
kHz
FREQ = V
IN
1.0
1.28
1.5
MHz
I
SHDN
Shutdown Pin Current
V
SHDN = 2.5V
8
13.5
µA
V
SHDN = 0.3V
1
2
I
L
Switch Leakage Current
V
SW = 20V
0.03
5
µA
R
DSON
Switch R
DSON
I
SW = 500mA
0.18
0.35
Th
SHDN
SHDN Threshold
Output High, V
IN = 2.5V to
7V
1.4
V
Output Low, V
IN = 2.5V to 7V
0.4
www.national.com
6


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