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參數(shù)資料
| 型號： | LM3100 |
| 廠商： | National Semiconductor Corporation |
| 英文描述： | SIMPLE SWITCHER㈢ Synchronous 1MHz 1.5A Step-Down Voltage Regulator |
| 中文描述： | 的SIMPLE SWITCHER㈢1MHz的1.5A的同步降壓穩(wěn)壓器 |
| 文件頁數(shù)： | 4/15頁 |
| 文件大?。?/td> | 1073K |
| 代理商： | LM3100 |
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, RON to GND
SW to GND
SW to GND (Transient)
VIN to SW
BST to SW
All Other Inputs to GND
-0.3V to 40V
-0.3V to 40V
-2V (
<
100ns)
-0.3V to 40V
-0.3V to 7V
-0.3V to 7V
ESD Rating (Note 2)
Human Body Model
Storage Temperature Range
Junction Temperature (T
J
)
±
2kV
-65C to +150C
150C
Operating Ratings
(Note 1)
Supply Voltage Range (VIN)
Junction Temperature Range (T
J
)
Thermal Resistance (
θ
JC
) (Note 3)
4.5V to 36V
40C to + 125C
6.5C/W
Electrical Charateristics
ply over the full Operating Junction Temperature (T
) range. Minimum and Maximum limits are guaranteed through test, de-
sign, or statistical correlation. Typical values represent the most likely parametric norm at T
J
= 25C, and are provided for ref-
erence purposes only. Unless otherwise stated the following conditions apply: V
IN
= 18V, V
OUT
= 3.3V.
Specifications with standard type are for T
J
= 25C only; limits in boldface type ap-
Symbol
Parameter
Conditions
Min
Typ
Max
Units
Start-Up Regulator, V
CC
V
CC
V
IN
- V
CC
V
CC
output voltage
V
IN
- V
CC
dropout voltage
C
CC
= 680nF, no load
I
CC
= 2mA
I
CC
= 20mA
V
CC
= 0V
V
IN
increasing
5.0
6.0
50
350
65
3.75
7.2
140
570
V
mV
I
VCCL
V
CC-UVLO
V
CC
current limit (Note 4)
V
CC
under-voltage lockout threshold
(UVLO)
V
CC
UVLO hysteresis
V
CC
UVLO filter delay
I
IN
operating current
I
IN
operating current, Device shutdown V
EN
= 0V
Switching Characteristics
R
DS-UP-ON
Main MOSFET Rds(on)
R
DS- DN-ON
Syn. MOSFET Rds(on)
V
G-UVLO
Gate drive voltage UVLO
Soft-start
I
SS
SS pin source current
Current Limit
I
CL
Syn. MOSFET current limit threshold
ON/OFF Timer
t
ON
ON timer pulse width
40
3.6
mA
V
3.85
V
CC-UVLO-HYS
t
VCC-UVLO-D
I
IN
I
IN-SD
V
IN
decreasing
130
3
0.7
17
mV
μs
mA
μA
No switching, V
FB
= 1V
1
30
0.18
0.11
3.3
0.35
0.2
4
V
V
BST
- V
SW
increasing
V
SS
= 0.5V
6
8
9.8
μA
1.9
A
V
IN
= 10V, R
ON
= 100 k
V
IN
= 30V, R
ON
= 100 k
1.38
0.47
200
260
μs
t
ON-MIN
t
OFF
ON timer minimum pulse width
OFF timer pulse width
ns
ns
Enable Input
V
EN
EN Pin input threshold
Enable threshold hysteresis
V
EN
rising
V
EN
falling
1.236
1.26
90
1.285
V
V
EN-HYS
mV
Regulation and Over-Voltage Comparator
V
FB
In-regulation feedback voltage
V
SS
≥
0.8V
T
J
= 40C to + 125C
V
SS
≥
0.8V
T
J
= 0C to + 125C
0.784
0.8
0.816
V
0.788
0.812
V
FB-OV
I
FB
Feedback over-voltage threshold
0.894
0.920
5
0.940
100
V
nA
Thermal Shutdown
T
SD
Thermal shutdown temperature
T
J
rising
165
C
L
www.national.com
4
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