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參數(shù)資料
| 型號： | LM2631MTC-ADJ/NOPB |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | SWITCHING CONTROLLER, 345 kHz SWITCHING FREQ-MAX, PDSO20 |
| 封裝： | TSSOP-20 |
| 文件頁數(shù)： | 5/12頁 |
| 文件大?。?/td> | 683K |
| 代理商： | LM2631MTC-ADJ/NOPB |
Absolute Maximum Ratings (Note 1)
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
Voltages from the indicated
pins to GND and PGND:
V
IN
0.3V to 32V
CBOOT
0.3V to 37V
SD
0.3V to 32V
SW
0.3V to 32V
CSH, CSL
0.3V to 8V
FPWM, SYNC
0.3V to 10V
Power Dissipation (T
A =
70C), (Note 2)
720mW
Storage Temperature Range
65C to +150C
Soldering Dwell Time,
Temperature (Note 3)
Wave
4 sec, 260C
Infrared
10 sec, 240C
Vapor Phase
75 sec, 219C
ESD Rating (Note 4)
1.5 kV
Operating Ratings
V
IN
4.5V to 30V
Junction Temperature
25C to +125C
Electrical Characteristics
Specifications in standard type face are for T
j = 25C and those with boldface type apply over full operating junction tem-
perature range. V
IN =10V, GND = PGND = 0V,unless otherwise stated. (Notes 5, 6)
Symbol
Parameter
Conditions
Typical
Limit
Units
System
V
IN
Input Supply Voltage
4.5
30
V(min)
V(max)
V
OUT
Output Voltage Adjustment Range
1.5
7.0
V(min)
V(max)
V
OUT/
V
OUT
Load Regulation
0 mV
≤ (CSH-CSL) ≤ 75 mV
0.3
%
V
OUT/
V
OUT
Line Regulation
4.5
≤ V
IN
≤ 30V
0.002
%/V
I
IN
Input Supply Current with the
Switching Controller ON
V
FB = 1V, VCSH = 2.15V, VCSL =
2.1V
0.8
mA
1.2/1.4
mA(max)
Input Supply Current with the
Switching Controller ON (Internal
Rail is Supplied from CSL Pin)
V
FB = 1V, VCSH = 5.15V, VCSL =
5V
0.15
mA
Input Supply Current with the IC
Shut Down
V
SD = 0V, VIN = 30V
0.1
A
3 (Note 7)
A(max)
Minimum Output Voltage for CSL
Providing the Internal Rail
3V
I
SS
Soft Start Source Current
V
SS = 1.5V
10
A
5
A(min)
13
A(max)
Soft Start Sink Current
V
SS = 1.5V
20
A
V
CL
Current Limit Voltage (Voltage from
CSH to CSL)
V
FB = 1V, VCSL = 1.8V
110
mV
90/80
mV(min)
130/140
mV(max)
V
IN Undervoltage Shutdown Latch
Threshold
Rising Edge
3.5
V
2.6
V(min)
V
OUT Undervoltage Shutdown
Latch Threshold (Note 8)
80
% V
OUT
72/70
%V
OUT(min)
89/90
%V
OUT(max)
V
OUT Overvoltage Shutdown Latch
Threshold (Note 8)
120
% V
OUT
113/110
%V
OUT(min)
129/130
%V
OUT(max)
LM2631
www.national.com
2
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