参数资料
型号: LT3092MPST#TRPBF
厂商: Linear Technology
文件页数: 7/22页
文件大小: 249K
描述: IC PROG CURRENT SOURCE SOT223-3
标准包装: 2,000
功能: 电流源
精确度: ±1%
输入电压: 1.2 V ~ 40 V
电流 - 输出: 200mA
工作温度: -55°C ~ 125°C
安装类型: 表面贴装
封装/外壳: TO-261-4,TO-261AA
供应商设备封装: SOT-223-3
包装: 带卷 (TR)
LT3092
7
3092fb
 PIN FUNCTIONS   (DD/ST/TS8)
IN (Pins 7, 8/Pin 3/Pins 7, 8): Input. This pin supplies 
power to bias internal circuitry and supply output load
current. For the device to operate properly and regulate,
the voltage on this pin must be 1.2V to 1.4V above the
OUT pin (depending on output load currentsee the
dropout voltage speci cations in the Electrical Charac-
teristics table).
NC (Pins 3, 5, 6/NA/Pins 1, 6): No Connection. These 
pins have no connection to internal circuitry and may be
tied to IN, OUT, GND or  oated.
OUT (Pins 1, 2/Pin 2/Pins 2, 3, 4): Output. This is the 
power output of the device. The minimum current source
value to which the LT3092 can be set is 0.5mA or the
device will not regulate.
SET (Pin 4/Pin 1/Pin 5): Set. This pin is the error ampli-
 ers noninverting input and also sets the operating bias
point of the circuit. A  xed 10糀 current source  ows out
of this pin. Two resistors program I
OUT
 as a function of
the resistor ratio relative to 10糀. Output current range
is 0.5mA to the maximum rated 200mA level.
Exposed Pad/Tab (Pin 9/Tab/NA): Output. The Exposed 
Pad of the DFN package and the Tab of the SOT-223
package are tied internally to OUT. Tie them directly to
the OUT pins (Pins 1, 2/Pin 2) at the PCB. The amount
of copper area and planes connected to OUT determine
the effective thermal resistance of the packages (see the
Applications Information section).
 BLOCK DIAGRAM
IN
SET
OUT
10糀
3092 BD
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