參數(shù)資料
型號(hào)： LT1269CT
廠商： LINEAR TECHNOLOGY CORP
元件分類： 穩(wěn)壓器
英文描述： RADIATION HARDENED HIGH EFFICIENCY, 5 AMP SWITCHING REGULATORS
中文描述： 8 A SWITCHING REGULATOR, 115 kHz SWITCHING FREQ-MAX, PZFM5
封裝： PLASTIC, TO-220, 5 PIN
文件頁(yè)數(shù)： 3/8頁(yè)
文件大?。?/td> 212K
代理商： LT1269CT
3
LT1271/LT1269
SYMBOL
PARAMETER
Control Pin Threshold
CONDITIONS
Duty Cycle = 0
MIN
0.7
0.5
0.4
TYP
0.9
MAX
1.08
1.25
0.54
UNITS
V
V
V
G
Normal/Flyback Threshold
on Feedback Pin
Flyback Reference Voltage
0.45
V
FB
I
FB
= 50
μ
A
15
14
4.5
16.3
17.6
18
8.5
V
V
V
G
V
FB
Change in Flyback
Reference Voltage
Flyback Reference Voltage
Line Regulation
Flyback Amplifier
Transconductance (gm)
Flyback Amplifier Source
and Sink Current
Output Switch Breakdown
Voltage
Output Switch (Note 1)
“On” Resistance
Control Voltage to Switch
Current Transconductance
Switch Current Limit (Note 2)
0.05
≤
I
FB
≤
1mA
6.8
I
FB
= 50
μ
A
3V
≤
V
IN
≤
V
MAX
I
C
=
±
10
μ
A
0.01
0.03
%/V
150
300
650
μ
mho
V
C
= 0.6V Source
I
FB
= 50
μ
A Sink
3V
≤
V
IN
≤
V
MAX
I
SW
= 1.5mA
G
G
15
25
60
32
40
75
70
70
μ
A
μ
A
BV
G
V
V
SAT
G
0.2
0.33
6.4
A/V
I
LIM
Duty Cycle = 50%
Duty Cycle = 80%
G
G
4
8
8
A
A
3.2
I
IN
I
SW
f
Supply Current Increase
During Switch On-Time
Switching Frequency
25
40
mA/A
LT1271
LT1269
LT1271
LT1269
G
G
50
85
85
80
60
100
92
90
1.5
100
70
115
95
95
kHz
kHz
%
%
μ
s
μ
A
DC (max)
Maximum Switch Duty Cycle
Flyback Sense Delay Time
Shutdown Mode
Supply Current
Shutdown Mode
Threshold Voltage
3V
≤
V
IN
≤
V
MAX
, V
C
= 0.05V
400
3V
≤
V
IN
≤
V
MAX
100
50
150
250
300
mV
mV
G
ELECTRICAL C
HARA TERISTICS
V
IN
= 15V, V
C
= 0.5V, V
FB
= V
REF,
switch pin open, unless otherwise noted.
The
G
denotes the specifications which apply over the full operating
temperature range.
Note 1:
Measured with V
C
in hi clamp, V
FB
= 0.8V.
Note 2:
For duty cycles (DC) between 50% and 85%, minimum
guaranteed switch current is given by I
LIM
= 2.67 (2 – DC).
Note 3:
Minimum input voltage.
相關(guān)PDF資料
PDF描述
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