参数资料
型号: LT1871EMS-7
厂商: LINEAR TECHNOLOGY CORP
元件分类: 稳压器
英文描述: SWITCHING CONTROLLER, 1000 kHz SWITCHING FREQ-MAX, PDSO10
封装: PLASTIC, MSOP-10
文件页数: 16/32页
文件大小: 461K
代理商: LT1871EMS-7
LTC1871-7
23
18717fc
APPLICATIONS INFORMATION
7. Minimize the capacitance between the SENSE pin trace
and any high frequency switching nodes. The LTC1871-7
contains an internal leading edge blanking time of ap-
proximately 180ns, which should be adequate for most
applications.
8. For optimum load regulation and true remote sens-
ing, the top of the output resistor divider should connect
independently to the top of the output capacitor (Kelvin
connection), staying away from any high dV/dt traces.
Place the divider resistors near the LTC1871-7 in order
to keep the high impedance FB node short.
Figure 18. LTC1871-7 Boost Converter Suggested Layout
Figure 19. LTC1871-7 Boost Converter Layout Diagram
LTC1871-7
M1
VIN
1871 F18
VOUT
SWITCH NODE IS ALSO
THE HEAT SPREADER
FOR L1, M1, D1
L1
RT
RS
RC
CC
R3
J1
CIN
COUT
CVCC
R1
R2
PSEUDO-KELVIN
SIGNAL GROUND
CONNECTION
TRUE REMOTE
OUTPUT SENSING
VIAS TO GROUND
PLANE
R4
PIN 1
COUT
JUMPER
D1
RUN
ITH
FB
FREQ
MODE/
SYNC
SENSE
VIN
INTVCC
GATE
GND
LTC1871-7
+
R4
J1
10
9
8
7
6
1
2
3
4
5
CVCC
PSEUDO-KELVIN
GROUND CONNECTION
CIN
M1
D1
L1
VIN
GND
18717 F19
VOUT
SWITCH
NODE
COUT
RC
RS
R1
RT
BOLD LINES INDICATE HIGH CURRENT PATHS
R2
CC
R3
+
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