參數(shù)資料
型號: ADP1871ACPZ-0.3-R7
廠商: ANALOG DEVICES INC
元件分類: 穩(wěn)壓器
英文描述: SWITCHING CONTROLLER, PDSO10
封裝: 3 X 3 MM, ROHS COMPLIANT, LFCSP-10
文件頁數(shù): 33/44頁
文件大?。?/td> 1958K
代理商: ADP1871ACPZ-0.3-R7
ADP1870/ADP1871
LAYOUT CONSIDERATIONS
The performance of a dc-to-dc converter depends highly on
how the voltage and current paths are configured on the printed
circuit board (PCB). Optimizing the placement of sensitive
analog and power components is essential to minimize output
ripple, maintain tight regulation specifications, and reduce
PWM jitter and electromagnetic interference.
Rev. A | Page 33 of 44
Figure 85 shows the schematic of a typical ADP1870/ADP1871
used for a high current application. Blue traces denote high current
pathways. VIN, PGND, and V
OUT
traces should be wide and
possibly replicated, descending down into the multiple layers.
Vias should populate, mainly around the positive and negative
terminals of the input and output capacitors, alongside the source
of Q1/Q2, the drain of Q3/Q4, and the inductor.
MURATA: (HIGH VOLTAGE INPUT CAPACITORS)
22μF, 25V, X7R, 1210 GRM32ER71E226KE15L
PANASONIC: (OUTPUT CAPACITORS)
270μF, SP-SERIES, 4V, 7m
EEFUE0G271LR
INFINEON MOSFETs:
BSC042N03MS G (LOWER SIDE)
BSC080N03MS G (UPPER SIDE)
WüRTH INDUCTORS:
1μH, 3.3m
, 20A 7443552100
R5
100k
Q3
Q4
Q1
Q2
HIGH VOLTAGE INPUT
V
IN
= 12V
C12
100nF
V
OUT
= 1.8V, 15A
+
C3
22μF
C4
22μF
C5
22μF
C6
22μF
C7
22μF
C8
N/A
C9
N/A
C23
270μF
+
C22
270μF
+
C21
270μF
C20
270μF
+
C27
N/A
C14 TO C19
N/A
+
C26
N/A
+
C25
N/A
+
C24
N/A
+
1.0μH
R6
2
C13
1.5nF
R1 30k
R2
15k
R4
0
V
OUT
1
VIN
10
BST
2
COMP/EN
9
SW
3
FB
8
DRVH
4
GND
7
PGND
5
VREG
6
DRVL
ADP1870/
ADP1871
C
571pF
R
C
47k
C
F
57pF
C1
1μF
C28
10μF
C2
0.1μF
JP3
0
Figure 85. ADP1870 High Current Evaluation Board Schematic (Blue Traces Indicate High Current Paths)
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