参数资料
型号: LTC3873ITS8-5#TRPBF
厂商: Linear Technology
文件页数: 5/16页
文件大小: 0K
描述: IC REG CTRLR BST FLYBK TSOT23-8
标准包装: 2,500
PWM 型: 电流模式
输出数: 1
频率 - 最大: 240kHz
占空比: 84%
电源电压: 4 V ~ 75 V
降压:
升压:
回扫:
反相:
倍增器:
除法器:
Cuk:
隔离:
工作温度: -40°C ~ 125°C
封装/外壳: SOT-23-8 薄型,TSOT-23-8
包装: 带卷 (TR)
LTC3873-5
TYPICAL PERFORMANCE CHARACTERISTICS
Maximum Sense Threshold
Frequency vs Temperature
vs Temperature
250
230
V IN = 5V
300
250
200
IPRG = V IN
IPRG = FLOAT
210
150
190
170
100
50
IPRG = GND
150
–60 –40 –20 0
20 40 60 80 100 120
0
–60 –40 –20 0
20 40 60 80 100 120
TEMPERATURE (°C)
3873-5 G09
TEMPERATURE (°C)
38735 G10
PIN FUNCTIONS
(TS8/DD8)
IPRG (Pin 1/Pin 4): Current Sense Limit Select Pin.
I TH (Pin 2/Pin 3): This pin serves as the error ampli?er
compensation point. Nominal voltage range for this pin
is 0.7V to 1.9V.
V FB (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
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.
MOSFET. This pin swings from 0V to V IN .
V CC (Pin 6/Pin 7): Supply Pin. This pin must be closely
decoupled to GND (Pin 4).
38735fb
5
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