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LM3485MM データシート(PDF) 3 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
部品番号 LM3485MM
部品情報  Hysteretic PFET Buck Controller
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メーカー  NSC [National Semiconductor (TI)]
ホームページ  http://www.national.com
Logo NSC - National Semiconductor (TI)

LM3485MM データシート(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.
VIN Voltage
−0.3V to 36V
PGATE Voltage
−0.3V to 36V
FB Voltage
−0.3V to 5V
ISENSE Voltage
−1.0V to 36V
ADJ Voltage
−0.3V to 36V
Maximum Junction Temp.
150˚C
Power Dissipation
417mW @ T
A =
25˚C
ESD Susceptibilty
Human Body Model (Note 3)
2kV
Lead Temperature
Vapor Phase (60 sec.)
Infared (15 sec.)
215˚C
220˚C
Storage Temperature
−65˚C to 150˚C
Operating Ratings (Note 1)
Supply Voltage
4.5V to 35V
Operating Junction
Temperature
−40˚C to +125˚C
Electrical Characteristics
Specifications in Standard type face are for T
J = 25˚C, and in bold type face apply over the full Operating Temperature
Range (T
J = −40˚C to +125˚C). Unless otherwise specified, VIN = 12V, VISNS =VIN − 1V, and VADJ =VIN − 1.1V. Datasheet
min/max specification limits are guaranteed by design, test, or statistical analysis.
Symbol
Parameter
Conditions
Min
(Note 4)
Typ
(Note 5)
Max
(Note 4)
Unit
I
Q
Quiescent Current at
ground pin
FB = 1.5V
(Not Switching)
250
400
µA
V
FB
Feedback Voltage
(Note 6)
1.226
1.217
1.242
1.258
1.267
V
V
HYST
Comparator
Hysteresis
10
14
15
20
mV
V
CL(Note 7)
Current limit
comparator trip
voltage
R
ADJ = 20kΩ
110
mV
R
ADJ = 160kΩ
880
V
CL_OFFSET
Current limit
comparator offset
V
FB = 1.5V
−20
0
+20
mV
I
CL_ADJ
Current limit ADJ
current source
V
FB = 1.5V
3.0
5.5
7.0
µA
T
CL
Current limit one shot
off time
V
ADJ = 11.5V
V
ISNS = 11.0V
V
FB = 1.0V
6
9
14
µs
R
PGATE
Driver resistance
Source
I
SOURCE = 100mA
5.5
Sink
I
Sink = 100mA
8.5
I
PGATE
Driver Output current
Source
V
IN = 7V,
P
GATE = 3.5V
0.44
A
Sink
V
IN = 7V,
P
GATE = 3.5V
0.32
V
PGATEMIN
Minimum driver
voltage
V
IN = 4.5V
V
FB = 1.0V
I
GATE = 100µA sink
1.2
V
I
FB
FB pin Bias Current
(Note 8)
V
FB = 1.0V
300
750
nA
T
ONMIN_NOR
Minimum on time in
normal operation
V
ISNS =VADJ+0.1V
C
load on OUT =
1000pF
(Note 9)
100
ns
www.national.com
3


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