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LM3477AMMX 数据表(PDF) 3 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
部件名 LM3477AMMX
功能描述  High Efficiency High-Side N-Channel Controller for Switching Regulator
PDF  23 Pages
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制造商  NSC [National Semiconductor (TI)]
网页  http://www.national.com
标志 NSC - National Semiconductor (TI)

LM3477AMMX 数据表(HTML) 3 Page - National Semiconductor (TI)

  LM3477AMMX Datasheet HTML 1Page - National Semiconductor (TI) LM3477AMMX Datasheet HTML 2Page - National Semiconductor (TI) LM3477AMMX Datasheet HTML 3Page - National Semiconductor (TI) LM3477AMMX Datasheet HTML 4Page - National Semiconductor (TI) LM3477AMMX Datasheet HTML 5Page - National Semiconductor (TI) LM3477AMMX Datasheet HTML 6Page - National Semiconductor (TI) LM3477AMMX Datasheet HTML 7Page - National Semiconductor (TI) LM3477AMMX Datasheet HTML 8Page - National Semiconductor (TI) LM3477AMMX Datasheet HTML 9Page - National Semiconductor (TI) Next Button
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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.
Input Voltage
36V
Peak Driver Output Current (<10µs)
1.0A
CB Pin Voltage (Note 2)
43V
I
SEN Pin Voltage
500mV
Power Dissipation
Internally Limited
Storage Temperature Range
−65˚C to +150˚C
Junction Temperature
+150˚C
ESD Susceptibilty (Note 3)
Human Body Model
Machine Model
2kV
200V
Lead Temperature for MSOP Package
Vapor Phase (60 sec.)
Infared (15 sec.)
215˚C
220˚C
Operating Ratings (Note 1)
Supply Voltage
2.97V
≤ V
IN
≤ 35V
Junction
Temperature Range
−40˚C
≤ T
J
≤ +125˚C
Electrical Characteristics (Note 4)
Specifications in Standard type face are for T
J = 25˚C, and in bold type face apply over the full Operating Temperature
Range. Unless otherwise specified, V
IN = 12V.
Symbol
Parameter
Conditions
Typical
Limit
Units
V
FB
Feedback Voltage
V
COMP = 1.4V,
2.97V
≤ V
IN
≤ 36V
1.270
1.260/1.252
1.288/1.290
V
V(min)
V(max)
∆V
LINE
Feedback Voltage Line
Regulation
2.97V
≤ V
IN
≤ 36V
0.001
%/V
∆V
LOAD
Output Voltage Load Regulation
±0.5
%/V (max)
V
UVLO
Input Undervoltage Lock-out
2.87
2.97
V
V(max)
V
UV(HYS)
Input Undervoltage Lock-out
Hysteresis
180
130
225
mV
mV (min)
mV (max)
F
SW
Switching Frequency
500
435
575
kHz
kHz(min)
kHz(max)
R
DS1 (ON)
Driver Switch On Resistance
(top)
I
DR = 0.2A, VIN=5V
7
Ω
R
DS2 (ON)
Driver Switch On Resistance
(bottom)
I
DR = 0.2A
4
Ω
(V
CB−VSW)max
Maximum Boot Voltage
V
IN < 7.2V
V
IN
V
V
IN
≥ 7.2V
7.2
D
max
Maximum Duty Cycle
93
88
%
%(min)
T
min (on)
Minimum On Time
330
230
495
nsec
nsec(min)
nsec(max)
I
SUPPLY
Supply Current (switching)
(Note 5)
2.0
3.0
mA
mA (max)
I
Q
Quiescent Current in Shutdown
Mode
(Note 6), V
IN =5V
5
8
µA
µA (max)
www.national.com
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