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LTC3810 参数 Datasheet PDF下载

LTC3810图片预览
型号: LTC3810
PDF下载: 下载PDF文件 查看货源
内容描述: 60V低IQ ,双通道,两相同步降压型 [60V Low IQ, Dual, 2-Phase Synchronous Step-Down]
分类和应用:
文件页数/大小: 40 页 / 464 K
品牌: Linear Systems [ Linear Systems ]
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LTC3890  
pin FuncTions  
Alternatively, a resistor divider on another voltage supply  
connected to this pin allows the LTC3890 output to track  
the other supply during start-up.  
TG1, TG2 (Pin 26, Pin 15): High Current Gate Drives for  
Top N-Channel MOSFETs. These are the outputs of float-  
ing drivers with a voltage swing equal to INTV – 0.5V  
CC  
superimposed on the switch node voltage SW.  
ITH1, ITH2 (Pin 30, Pin 12): Error Amplifier Outputs and  
Switching Regulator Compensation Points. Each associ-  
ated channel’s current comparator trip point increases  
with this control voltage.  
PGOOD1, PGOOD2 (Pin 27, Pin 14): Open-Drain Logic  
Output. PGOOD1,2 is pulled to ground when the voltage  
on the V  
pin is not within 10% of its set point.  
FB1,2  
V
, V (Pin31, Pin11):Receivestheremotelysensed  
I
(Pin 28): Current Comparator Sense Voltage Range  
FB1 FB2  
LIM  
feedback voltage for each controller from an external  
Inputs. Tying this pin to SGND, FLOAT or INTV sets the  
CC  
resistive divider across the output.  
maximumcurrentsensethresholdtooneofthreedifferent  
levels for both comparators.  
+
+
SENSE1 , SENSE2 (Pin 32, Pin 10): The (+) input to the  
differential current comparators are normally connected  
to DCR sensing networks or current sensing resistors.  
The ITH pin voltage and controlled offsets between the  
TRACK/SS1, TRACK/SS2 (Pin 29, Pin 13): External  
Tracking and Soft-Start Input. The LTC3890 regulates the  
V
voltage to the smaller of 0.8V or the voltage on the  
FB1,2  
+
SENSE and SENSE pins in conjunction with R  
the current trip threshold.  
set  
TRACK/SS1,2 pin. An internal 1µA pull-up current source  
is connected to this pin. A capacitor to ground at this  
pin sets the ramp time to final regulated output voltage.  
SENSE  
3890fb  
9