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参数资料
| 型号： | LT1765-3.3 |
| 厂商： | Linear Technology Corporation |
| 英文描述： | CONTACT |
| 中文描述： | 单片，1.25MHz的步骤3a型开关稳压器 |
| 文件页数： | 3/20页 |
| 文件大小： | 247K |
| 代理商： | LT1765-3.3 |
LT1765/LT1765-1.8/LT1765-2.5/
LT1765-3.3/LT1765-5
3
sn1765 1765fas
Note 1:
Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2:
The LT1765E is guaranteed to meet performance specifications
from 0
°
C to 125
°
C. Specifications over the –40
°
C to 125
°
C operating
junction temperature range are assured by design, characterization and
correlation with statistical process controls.
FB Input Current
FB Input Resistance
LT1765 (Adj)
LT1765
LT1765-1.8
LT1765-3.3
LT1765-5
0.4V < V
C
< 0.9V
I
VC
=
±
10
μ
A
V
FB
= V
NOM
– 17%
V
FB
= V
NOM
+ 17%
G
–0.25
15
21
27.5
42
350
850
120
110
5
0.4
0.9
90
–0.5
21
30
39
60
μ
A
k
k
k
k
G
G
G
G
10.5
14.7
19
29
150
500
80
70
FB Error Amp Voltage Gain
FB Error Amp Transconductance
V
C
Pin Source Current
V
C
Pin Sink Current
V
C
Pin to Switch Current Transconductance
V
C
Pin Minimum Switching Threshold
V
C
Pin 3A I
SW
Threshold
Maximum Switch Duty Cycle
G
1300
160
180
μ
Mho
G
μ
A
μ
A
A/V
G
Duty Cycle = 0%
V
V
V
C
= 1.2V, I
SW
= 800mA, V
IN
= 6V
85
80
%
%
V
G
Minimum Boost Voltage Above Switch
Boost Current
I
SW
= 3A
I
SW
= 1A (Note 4)
I
SW
= 3A (Note 4)
G
1.8
20
70
1.33
7
–10
1.5
2.7
30
140
1.40
10
–13
2.2
2
G
G
mA
mA
SHDN Threshold Voltage
SHDN Threshold Current Hysteresis
SHDN Input Current (Shutting Down)
SYNC Threshold Voltage
SYNC Input Frequency
SYNC Pin Resistance
G
1.27
4
–7
V
G
μ
A
μ
A
V
SHDN = 60mV Above Threshold
G
1.6
MHz
k
I
SYNC
= 1mA
20
ELECTRICAL CHARACTERISTICS
The
G
denotes the specifications which apply over the full operating temperature range, otherwise specifications are at T
A
= 25
°
C.
V
IN
= 15V, V
C
= 0.8V, Boost = V
IN
+ 5V, SHDN, SYNC and switch open unless otherwise noted.
Note 3:
Minimum input voltage is defined as the voltage where the internal
regulator enters lockout. Actual minimum input voltage to maintain a
regulated output will depend on output voltage and load current. See
Applications Information.
Note 4:
Current flows into the BOOST pin only during the on period of the
switch cycle.
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
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相关代理商/技术参数 |
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