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LM2700 Datenblatt(PDF) 4 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor. Click here to check the latest version.
Teilenummer LM2700
Bauteilbeschribung  600kHz/1.25MHz, 2.5A, Step-up PWM DC/DC Converter
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Hersteller  NSC [National Semiconductor (TI)]
Direct Link  http://www.national.com
Logo NSC - National Semiconductor (TI)

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Absolute Maximum Ratings (Note 2)
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
V
IN
12V
SW Voltage
18V
FB Voltage
7V
V
C Voltage
0.965V
≤ V
C
≤ 1.565V
SHDN Voltage (Note 1)
7V
FSLCT (Note 1)
12V
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
Machine Model
200V
Operating Conditions
Operating Junction
Temperature Range
(Note 5)
−40˚C to +125˚C
Storage Temperature
−65˚C to +150˚C
Supply Voltage
2.2V to 12V
SW Voltage
17.5V
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 =2.2V and IL = 0A, unless otherwise specified.
Symbol
Parameter
Conditions
Min
(Note 5)
Typ
(Note 6)
Max
(Note 5)
Units
I
Q
Quiescent Current
FB = 2.2V (Not Switching)
FSLCT = 0V
1.2
2
mA
FB = 2.2V (Not Switching)
FSLCT = V
IN
1.3
2
mA
V
SHDN =0V
5
20
µA
V
FB
Feedback Voltage
1.2285
1.26
1.2915
V
I
CL(Note 7)
Switch Current Limit
V
IN = 2.7V (Note 8)
2.55
3.6
4.3
A
%V
FB/
∆V
IN
Feedback Voltage Line
Regulation
2.2V
≤ V
IN
≤ 12.0V
0.02
0.07
%/V
I
B
FB Pin Bias Current
(Note 9)
0.5
40
nA
V
IN
Input Voltage Range
2.2
12
V
g
m
Error Amp Transconductance
∆I = 5µA
40
155
290
µmho
A
V
Error Amp Voltage Gain
135
V/V
D
MAX
Maximum Duty Cycle
FSLCT = Ground
78
85
%
D
MIN
Minimum Duty Cycle
FSLCT = Ground
15
%
FSLCT = V
IN
30
f
S
Switching Frequency
FSLCT = Ground
480
600
720
kHz
FSLCT = V
IN
1
1.25
1.5
MHz
I
SHDN
Shutdown Pin Current
V
SHDN =VIN
0.008
1
µA
V
SHDN =0V
−0.5
−1
I
L
Switch Leakage Current
V
SW = 18V
0.02
20
µA
R
DSON
Switch R
DSON (Note 10)
V
IN = 2.7V, ISW =2A
80
150
m
Th
SHDN
SHDN Threshold
Output High
0.9
0.6
V
Output Low
0.6
0.3
V
UVP
On Threshold
1.95
2.05
2.2
V
Off Threshold
1.85
1.95
2.1
V
θ
JA
Thermal Resistance
(Note 11)
TSSOP, package only
150
˚C/W
LLP, package only
45
Note 1: This voltage should never exceed VIN.
Note 2: 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.
www.national.com
4


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