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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)： | 6/12頁 |
| 文件大?。?/td> | 683K |
| 代理商： | LM2631MTC-ADJ/NOPB |
Electrical Characteristics (Continued)
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
V
OUT Low Regulation Comparator
Enable Threshold
97
% V
OUT
Hysteresis of Low Regulation
Comparator
2% V
OUT
Regulator Window Detector
Thresholds (PGOOD from High to
Low)
91 or 109
%V
OUT
Regulator Window Detector
Thresholds (PGOOD from Low to
High)
97 or 103
% V
OUT
Gate Drive
V
BOOT
Bootstrap Voltage (Voltage from
CBOOT to SW)
CBOOT Sourcing 100 A
4.5
V
4.0
V(min)
I
BOOT
CBOOT Leakage Current
V
CBOOT = 7V
100
nA
High Drive Source Current
V
HDRV = 0V, VCBOOT = 5V
0.3
A
High Drive Sink Current
HDRV Forced to 5V
0.45
A
Low Drive Source Current
LDRV Forced to 0V
0.35
A
Low Drive Sink Current
LDRV Forced to 5V
0.55
A
High-Side FET On-Resistance
HDRV or LDRV
8
Low-Side FET On-Resistance
HDRV or LDRV
4
Oscillator
F
OSC
Oscillator Frequency
FADJ Open
200
kHz
172/162
kHz(min)
228/230
kHz(max)
Oscillator Frequency
FADJ Sourcing 2.94 A (Note 9)
300
kHz
255
kHz(min)
345
kHz(max)
V
FADJ
Voltage at FADJ pin
1.03
V
D
MAX
Maximum Duty Cycle
FADJ Open
96
%
92
%(min)
Maximum Frequency of
Synchronization
Low-Going 200 ns Wide
Rectangular Pulses Applied at 400
kHz at the SYNC Input
400
kHz(min)
Minimum Pulse Width of the SYNC
Signal
SYNC Pulses are Low-Going
200
ns(min)
Error Amplifier
I
FB
Feedback Input Bias Current
V
FB = 1.3V, VCSH = 5.15V, VCSL =
5V
100
nA
I
COMP
COMP Output Source Current
V
COMP = 0.2V, VFB =1V
50
A
COMP Output Sink Current
V
COMP = 1.2V, VFB = 1.4V
50
A
Voltage Reference
V
REF
Reference Voltage (Nominal))
I
REF = 0A
1.238
V
1.219/1.219
V(min)
1.251/1.262
V(max)
LM2631
www.national.com
3
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