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參數(shù)資料
| 型號： | LT1370HV |
| 廠商： | Linear Technology Corporation |
| 英文描述： | Octal D-Type Edge-Triggered Flip-Flops With 3-State Outputs 20-SOIC 0 to 70 |
| 中文描述： | 500kHz的高效率6A條開關穩(wěn)壓器 |
| 文件頁數(shù)： | 5/16頁 |
| 文件大?。?/td> | 293K |
| 代理商： | LT1370HV |
5
LT1370
TYPICAL PERFOR
M
A
CE CHARACTERISTICS
U
TEMPERATURE (
°
C)
–50
F
400
500
600
150
LT1370 G11
300
200
0
0
50
100
100
800
700
–25
25
75
125
V
FB
=V
REF
Feedback Input Current
vs Temperature
TEMPERATURE (
°
C)
–50
–50
N
μ
A
–30
0
0
50
75
LT1370 G12
–40
–10
–20
–25
25
100 125
150
V
NFB
=V
NFR
Negative Feedback Input Current
vs Temperature
V
C
Pin Threshold and High
Clamp Voltage vs Temperature
TEMPERATURE (
°
C)
–50
1.0
V
C
1.4
2.2
0
50
75
LT1370 G10
1.2
1.8
2.0
1.6
–25
25
100 125
150
V
C
HIGH CLAMP
V
C
THRESHOLD
PI
FU
CTIO
N
S
U
U
V
C
:
The Compensation pin is used for frequency compen-
sation, current limiting and soft start. It is the output of the
error amplifier and the input of the current comparator.
Loop frequency compensation can be performed with an
RC network connected from the V
C
pin to ground. See
Applications Information.
FB:
T
he Feedback pin is used for positive output voltage
sensing and oscillator frequency shifting. It is the invert-
ing input to the error amplifier. The noninverting input of
this amplifier is internally tied to a 1.245V reference.
NFB:
The Negative Feedback pin is used for negative
output voltage sensing. It is connected to the inverting
input of the negative feedback amplifier through a 100k
source resistor.
S/S:
Shutdown and Synchronization Pin. The S/S pin is
logic level compatible. Shutdown is active low and the
shutdown threshold is typically 1.3V. For normal opera-
tion, pull the S/S pin high, tie it to V
IN
or leave it floating. To
synchronize switching, drive the S/S pin between 600kHz
and 800kHz. See Applications Information.
V
IN
:
Bypass Input Supply Pin with a Low ESR Capacitor,
10
μ
F or More. The regulator goes into undervoltage lock-
out when V
IN
drops below 2.5V. Undervoltage lockout
stops switching and pulls the V
C
pin low.
V
SW
:
The Switch pin is the collector of the power switch
and has large currents flowing through it. Keep the traces
to the switching components as short as possible to
minimize radiation and voltage spikes.
GND:
Tie all ground pins to a good quality ground plane.
See Applications Information.
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