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LP78086 数据表(PDF) 2 Page - Lowpower Semiconductor inc

部件名 LP78086
功能描述  650mA High Efficiency Synchronous Buck with Dual Channel LDO
PDF  9 Pages
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制造商  POWER [Lowpower Semiconductor inc]
网页  http://www.lowpowersemi.com
标志 POWER - Lowpower Semiconductor inc

LP78086 数据表(HTML) 2 Page - Lowpower Semiconductor inc

  LP78086 Datasheet HTML 1Page - Lowpower Semiconductor inc LP78086 Datasheet HTML 2Page - Lowpower Semiconductor inc LP78086 Datasheet HTML 3Page - Lowpower Semiconductor inc LP78086 Datasheet HTML 4Page - Lowpower Semiconductor inc LP78086 Datasheet HTML 5Page - Lowpower Semiconductor inc LP78086 Datasheet HTML 6Page - Lowpower Semiconductor inc LP78086 Datasheet HTML 7Page - Lowpower Semiconductor inc LP78086 Datasheet HTML 8Page - Lowpower Semiconductor inc LP78086 Datasheet HTML 9Page - Lowpower Semiconductor inc  
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Preliminary
Datasheet
LP78086
LP78086 –00 Ver. 1.0 Datasheet
Feb.-2008
Page 2 of 9
Typical Application Circuit
OUT3-2.5V
R5
316K
R1
100K
OUT2-3.3V
OUT1-1.8V
+
Cout3
10uF
+
Cout1
1uF
+
Cout2
10uF
R4
100K
LP78086
3
4
2
5
7
8
10
11
GND
OUT2
SW
FB2
OUT3
FB3
FB1
PGND
R5
100K
R3
450K
R2
200K
+
CIN
10uF
VIN
+
Cout1
10uF
4.7uH
Figure 1. LP78086 High Efficiency Step-Down Converter
Functional Pin Description
Pin
Number
Pin Name
Pin Function
1
VDD
Chip Power Input.
2
SW
Pin For Switching.
3
GND
Ground.
4
OUT2
Output2,LDO output.
5
FB2
Feedback2(OUT2) Input Pin, Reference voltage is 1.21V.
6
VINL
LDO2,LDO3 Power Input.
7
OUT3
Output3,LDO output LDO Chip Enable(Active High).
8
FB3
Feedback3(OUT3) Input Pin, Reference voltage is 1.21V.
9
EN
Chip Enable(Active High).
10
FB1
Feedback1(OUT1) Input Pin, Reference voltage is 0.6V.
11
PGND
Power Ground.



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