ADP1873ARMZ-0.3-R7 Analog Devices Inc, ADP1873ARMZ-0.3-R7 Datasheet - Page 32

• Manufacturer Part Number: ADP1873ARMZ-0.3-R7
• Description: 300kHz, Light Load Eff Enabled
• Manufacturer: Analog Devices Inc

Specifications of ADP1873ARMZ-0.3-R7

• Pwm Type: Current Mode
• Number Of Outputs: 1
• Frequency - Max: 300kHz
• Duty Cycle: 84%
• Voltage - Supply: 2.75 V ~ 20 V
• Buck: Yes
• Boost: No
• Flyback: No
• Inverting: No
• Doubler: No
• Divider: No
• Cuk: No
• Isolated: No
• Operating Temperature: -40°C ~ 125°C
• Package / Case: 10-MSOP, Micro10™, 10-uMAX, 10-uSOP
• Frequency-max: 300kHz
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: ADP1873ARMZ-0.3-R7TR

ADP1872/ADP1873
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 are essential to minimize output
ripple, maintain tight regulation specifications, and reduce
PWM jitter and electromagnetic interference.
LOW VOLTAGE INPUT
Figure 82. ADP1872/ADP1873 High Current Evaluation Board Schematic (Blue Traces Indicate High Current Paths)
V
V
57pF
DD
OUT
C
= 5.0V
F
0.1µF
R1 30kΩ
C2
15kΩ
JP1
C
571pF
R
47kΩ
R2
1µF
C
C
C1
1
2
3
4
5
VIN
COMP/EN
FB
GND
VDD
ADP1872/
ADP1873
DRVH
PGND
DRVL
BST
SW
10
9
8
7
6
Rev. A | Page 32 of 40
100kΩ
C12
100nF
R5
HIGH VOLTAGE INPUT
VIN = 12V
Q1
Q3
Figure 82 shows the schematic of a typical ADP1872/ADP1873
used for a high power application. Blue traces denote high current
pathways. VIN, PGND, and V
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.
Q2
Q4
MURATA: (HIGH VOLTAGE INPUT CAPACITORS)
PANASONIC: (OUTPUT CAPACITORS)
INFINEON MOSFETs:
WURTH INDUCTORS:
22µF, 25V, X7R, 1210 GRM32ER71E226KE15 L
270µF (SP-SERIES) 4V, 7mΩ EEFUE0G271LR
BSC042N03MS G (LOWER-SIDE)
BSC080N03MS G (UPPER-SIDE)
1µH, 3.3mΩ, 20A 7443552100
R6
2Ω
C13
1.5nF
22µF
C3
1.0µH
270µF
C20
22µF
C4
+
270µF
C21
22µF
C5
V
+
OUT
270µF
22µF
C22
= 1.8V, 15A
OUT
C6
traces should be wide and
+
270µF
22µF
C23
C7
+