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参数资料
| 型号： | LTC3873IDDB-5#TR |
| 厂商： | LINEAR TECHNOLOGY CORP |
| 元件分类： | 稳压器 |
| 英文描述： | SWITCHING CONTROLLER, PDSO8 |
| 封装： | 3 X 2 MM, 0.75 MM HEIGHT, PLASTIC, MO-229WECD-1, DFN-8 |
| 文件页数： | 12/16页 |
| 文件大小： | 170K |
| 代理商： | LTC3873IDDB-5#TR |
LTC3873-5
5
38735fb
TEMPERATURE (°C)
0
MAXIMUM
SENSE
THRESHOLD
(mV)
100
200
300
50
150
250
–20
20
60
100
38735 G10
120
–40
–60
0
40
80
IPRG = VIN
IPRG = FLOAT
IPRG = GND
Frequency vs Temperature
Maximum Sense Threshold
vs Temperature
TEMPERATURE (°C)
–60
FREQUECY
(kHz)
210
230
250
100
3873-5 G09
190
170
150
–40 –20
0
20
40
60
80
120
VIN = 5V
TYPICAL PERFORMANCE CHARACTERISTICS
IPRG (Pin 1/Pin 4): Current Sense Limit Select Pin.
ITH (Pin 2/Pin 3): This pin serves as the error amplier
compensation point. Nominal voltage range for this pin
is 0.7V to 1.9V.
VFB (Pin 3/Pin 2): This pin receives the feedback voltage
from an external resistor divider across the output.
GND (Pin 4/Pin 1): Ground Pin.
NGATE (Pin 5/Pin 8): Gate Drive for the External N-Channel
MOSFET. This pin swings from 0V to VIN.
VCC (Pin 6/Pin 7): Supply Pin. This pin must be closely
decoupled to GND (Pin 4).
PIN FUNCTIONS (TS8/DD8)
RUN/SS (Pin 7/Pin 6): Shutdown and External Soft-Start
Pin. In shutdown, all functions are disabled and the NGATE
pin is held low.
SW (Pin 8/Pin 5): Switch node connection to inductor and
current sense input pin through external slope compensa-
tion resistor. Normally, the external N-channel MOSFET’s
drain is connected to this pin.
Exposed Pad (NA/Pin 9): Ground. Must be soldered to PCB
for electrical contact and rated thermal performance.
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