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参数资料
| 型号： | LTC3785EUF-1#TRPBF |
| 厂商： | LINEAR TECHNOLOGY CORP |
| 元件分类： | 稳压器 |
| 英文描述： | 3 A SWITCHING REGULATOR, 650 kHz SWITCHING FREQ-MAX, PQCC24 |
| 封装： | 4 X 4 MM, LEAD FREE, PLASTIC, MO-220WGGD, QFN-24 |
| 文件页数： | 16/20页 |
| 文件大小： | 213K |
| 代理商： | LTC3785EUF-1#TRPBF |
LTC3785-1
5
37851fa
TEMPERATURE (°C)
–50
1.2255
1.2245
1.2250
1.2240
1.2235
1.2230
1.2225
1.2220
1.2215
1.2210
25
75
37851 G07
–25
0
50
100
V
FB
(V)
TEMPERATURE (°C)
–50
–1.0
CHANGE
FROM
25°C
(%)
–0.6
–0.2
0.2
–25
0
25
50
37851 G08
75
0.6
1.0
–0.8
–0.4
0
0.4
0.8
100
RT (kΩ)
20
0
OSCILLATOR
FREQUENCY
(kHz)
200
400
600
800
1000
1200
40
60
80
100
37851 G09
TYPICAL PERFORMANCE CHARACTERISTICS
TEMPERATURE (°C)
–50
2.465
V
IN
START-UP
VOLTAGE
(V)
2.470
2.475
2.480
2.485
2.490
–25
025
50
37851 G10
75
100
TEMPERATURE (°C)
–50
V
IN
CURRENT
(mA)
–25
0
25
50
37851 G11
75
80
85
100
90
95
100
TEMPERATURE (°C)
–50
–8
THRESHOLD
(%)
–4
0
4
–25
0
25
50
37851 G12
75
8
–6
–2
2
6
100
OV THRESHOLD
UV THRESHOLD
VIN Start-Up Voltage
vs Temperature
VIN Burst Quiescent Current
vs Temperature
OV and UV Thresholds
vs Temperature
VFB vs Temperature
Normalized Oscillator Frequency
vs Temperature
Oscillator Frequency vs RT
PIN FUNCTIONS
RUN/SS (Pin 1): Run Control and Soft-Start Input. An
internal 1μA charges the soft-start capacitor and will
charge to approximately 2.5V. During a current limit fault,
the soft-start capacitor will incrementally discharge. Once
the pin drops below 1.225V the IC will enter fault mode,
turning off the outputs for 32 times the soft-start time. If
>5μA (at RUN/SS = 1.225V) is applied externally, the part
will latch off after a fault is detected. If >40μA (at RUN/SS
= 1.225V) is applied externally, current limit faults will not
discharge the SS capacitor.
VC (Pin 2): Error Amp Output. A frequency compensation
network is connected from this pin to the FB pin to compen-
sate the loop. See the section Closing the Feedback Loop
in the Applications Information section for guidelines.
FB (Pin 3): Feedback Pin. Connect resistor divider tap
here. The feedback reference voltage is typically 1.225V
The output voltage can be adjusted from 2.7V to 10V ac-
cording to the following formula:
VOUT = 1.225V
R1
+R2
R2
相关PDF资料 |
PDF描述 |
|---|---|
| LTC3785EUF-1#PBF | 3 A SWITCHING REGULATOR, 650 kHz SWITCHING FREQ-MAX, PQCC24 |
| LTC3823EUH | 4 A SWITCHING CONTROLLER, 200 kHz SWITCHING FREQ-MAX, PQCC32 |
| LTC3823EGN | 4 A SWITCHING CONTROLLER, 200 kHz SWITCHING FREQ-MAX, PDSO28 |
| LTC3823EUH#TR | 4 A SWITCHING CONTROLLER, 200 kHz SWITCHING FREQ-MAX, PQCC32 |
| LTC3823EGN#TR | 4 A SWITCHING CONTROLLER, 200 kHz SWITCHING FREQ-MAX, PDSO28 |
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