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參數(shù)資料
| 型號： | LM3075MTCX/NOPB |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | SWITCHING CONTROLLER, 330 kHz SWITCHING FREQ-MAX, PDSO20 |
| 封裝： | LEAD FREE, TSSOP-20 |
| 文件頁數(shù)： | 13/18頁 |
| 文件大小： | 857K |
| 代理商： | LM3075MTCX/NOPB |
Electrical Characteristics Limits in standard type are for T
J = 25C only, and limits in boldface type apply
over the junction temperature T
J range of -40C to +125C. Minimum and Maximum limits are guaranteed through test, design,
or statistical correlation. Typical values represent the most likely parametric norm at T
J = 25C, and are provided for reference
purposes only. Unless otherwise specified V
IN = 12V. (Continued)
Symbol
Parameter
Conditions
Min
Typ
Max
Unit
I
CBOOT
C
BOOT Leakage Current
V
CBOOT =7V
10
nA
R
ds_on 1
HDRV FET driver pull-up
On resistance
2.9
R
ds_on 2
HDRV FET driver pull-down
On resistance
1.7
R
ds_on 3
LDRV FET driver pull-up On
resistance
2.4
R
ds_on 4
LDRV FET driver pull-down
On resistance
0.8
OSCILLATOR
f
OSC
Oscillator Frequency
V
FS =5V
255
300
330
kHz
V
FS =0V
165
200
215
D
MAX
Maximum Dutycycle
V
FB =1V
95.5
98
%
T
ON_MIN
Minimum On Time
180
260
ns
ERROR AMPLIFIER
I
FB
Feedback pin bias current
V
FB = 1.5V
50
nA
I
COMP_SRC
COMP Output Source
Current
V
FB =1V
V
COMP =1V
120
A
I
COMP_SNK
COMP Output Sink Current
V
FB = 1.5V
V
COMP = 0.5V
110
A
Gm
Error Amplifier
Transconductance
620
mho
A
VOL
Error Amplifier Voltage Gain
1250
V/V
V
SL
Slope Compensation
(referred to the internal
summing node)
V
FS = 0V
0.051
V/s
V
FS = 5V
0.076
A
CS
Current Sense Amplifier
Gain
V
COMP = 1.25V
4
5
6
V/V
LOGIC
V
IL
FS, /FPWM Pin Maximum
Low Level Input Level
0.8
V
IH
FS, /FPWM Pin Minimum
High Level Input Level
2
V
THERMAL SHUTDOWN
T
SD
Thermal Shutdown
160
C
T
SD_HYS
Thermal Shutdown
Hysteresis
10
C
EXT
R
EXT
EXT pin on resistance
V
EXT =5V
I
VLIN5 =50mA
4
TH
EXT
VLIN5 to EXT Switch Over
Rising Threshold
4.6
V
LM3075
www.national.com
4
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