參數(shù)資料
型號: LM3477MMX
廠商: NATIONAL SEMICONDUCTOR CORP
元件分類: 穩(wěn)壓器
英文描述: High Efficiency High-Side N-Channel Controller for Switching Regulator
中文描述: 1 A SWITCHING CONTROLLER, 575 kHz SWITCHING FREQ-MAX, PDSO8
封裝: MSOP-8
文件頁數(shù): 3/23頁
文件大?。?/td> 815K
代理商: LM3477MMX
Absolute Maximum Ratings
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
(Note 1)
Input Voltage
Peak Driver Output Current (
<
10μs)
CB Pin Voltage (Note 2)
I
SEN
Pin Voltage
Power Dissipation
Storage Temperature Range
Junction Temperature
ESD Susceptibilty (Note 3)
Human Body Model
Machine Model
36V
1.0A
43V
500mV
Internally Limited
65C to +150C
+150C
2kV
200V
Lead Temperature for MSOP Package
Vapor Phase (60 sec.)
Infared (15 sec.)
215C
220C
Operating Ratings
(Note 1)
Supply Voltage
Junction
Temperature Range
2.97V
V
IN
35V
40C
T
J
+125C
Electrical Characteristics
(Note 4)
Specifications in Standard type face are for T
J
= 25C, and in
bold type face
apply over the full
Operating Temperature
Range
. Unless otherwise specified, V
IN
= 12V.
Symbol
Parameter
Conditions
V
FB
Feedback Voltage
V
COMP
= 1.4V,
2.97V
V
IN
36V
Typical
1.270
Limit
Units
V
V(min)
V(max)
%/V
1.260/
1.252
1.288/
1.290
V
LINE
Feedback Voltage Line
Regulation
Output Voltage Load Regulation
Input Undervoltage Lock-out
2.97V
V
IN
36V
0.001
V
LOAD
V
UVLO
±
0.5
2.87
%/V (max)
2.97
V
V(max)
mV
mV (min)
mV (max)
kHz
kHz(min)
kHz(max)
V
UV(HYS)
Input Undervoltage Lock-out
Hysteresis
180
130
225
F
SW
Switching Frequency
500
435
575
R
DS1 (ON)
Driver Switch On Resistance
(top)
Driver Switch On Resistance
(bottom)
Maximum Boot Voltage
I
DR
= 0.2A, V
IN
= 5V
7
R
DS2 (ON)
I
DR
= 0.2A
4
(V
CB
V
SW
)
max
V
IN
<
7.2V
V
IN
7.2V
V
IN
7.2
93
V
D
max
Maximum Duty Cycle
88
%
%(min)
nsec
nsec(min)
nsec(max)
mA
mA (max)
μA
μA (max)
T
min
(on)
Minimum On Time
330
230
495
I
SUPPLY
Supply Current (switching)
(Note 5)
2.0
3.0
I
Q
Quiescent Current in Shutdown
Mode
(Note 6), V
IN
= 5V
5
8
L
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