参数资料
型号: LTC3803ES6-5#TRM
厂商: Linear Technology
文件页数: 6/16页
文件大小: 0K
描述: IC REG CTRLR FLYBK PWM TSOT23-6
标准包装: 1
PWM 型: 电流模式
输出数: 1
频率 - 最大: 230kHz
占空比: 90%
电源电压: 4 V ~ 8.1 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-23-6 细型,TSOT-23-6
包装: 剪切带 (CT)
相关产品: 732-2263-6-ND - TRANS FLYBACK LTC3803 16.9UH
732-2263-1-ND - TRANS FLYBACK LTC3803 16.9UH
732-2263-2-ND - TRANS FLYBACK LTC3803 16.9UH
其它名称: LTC3803ES6-5
LTC3803ES6-5#TRMCT
LTC3803ES6-5-ND

LTC3803-5
PIN FUNCTIONS
I TH /RUN (Pin 1): This pin performs two functions. It
serves as the error ampli?er compensation point as well
as the run/shutdown control input. Nominal voltage range
is 0.7V to 1.9V. Forcing this pin below the shutdown
threshold (V ITHSHDN ) causes the LTC3803-5 to shut down.
In shutdown mode, the NGATE pin is held low.
GND (Pin 2): Ground Pin.
V FB (Pin 3): Receives the feedback voltage from an external
resistive divider across the output.
SENSE (Pin 4): This pin performs two functions. It monitors
switch current by reading the voltage across an external
current sense resistor to ground. It also injects a current
ramp that develops slope compensation voltage across
an optional external programming resistor.
V CC (Pin 5): Supply Pin. Must be closely decoupled to
GND (Pin 2).
NGATE (Pin 6): Gate Drive for the External N-channel
MOSFET. This pin swings from 0V to V CC .
BLOCK DIAGRAM
5
V CC
SHUTDOWN
800mV
REFERENCE
V CC
SHUNT
REGULATOR
0.3μA 0.28V
+
COMPARATOR
V CC < V TURNON
UNDERVOLTAGE
LOCKOUT
SOFT-
START
CLAMP
CURRENT
SHUTDOWN
ERROR
COMPARATOR
V CC
3
V FB
+
AMPLIFIER
R
S
Q
SWITCHING
LOGIC AND
BLANKING
CIRCUIT
GATE
DRIVER NGATE
6
SLOPE
2
GND
1.2V
20mV
200kHz
OSCILLATOR
COMP
CURRENT
RAMP
SENSE
4
1
I TH /RUN
38035 BD
38035fd
6
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