MAX5037 MAXIM [Maxim Integrated Products], MAX5037 Datasheet - Page 28

• Manufacturer Part Number: MAX5037
• Description: VRM 9.0, Dual-Phase, Parallelable, Average Current-Mode Controller
• Manufacturer: MAXIM [Maxim Integrated Products]

Use the following guidelines to layout the switching
voltage regulator.
1) Place the V
2) Minimize the high-current loops from the input
3) Keep short the current loop from the lower switch-
4) Place the Schottky diodes close to the lower
5) Keep the SGND and PGND isolated and connect
6) Run the current-sense lines CS+ and CS- very
7) Avoid long traces between the V
8) Place the bank of output capacitors close to the load.
9) Distribute the power components evenly across the
10) Provide enough copper area at and around the
11) Use at least 4oz copper to keep the trace induc-
VRM 9.0, Dual-Phase, Parallelable,
Average Current-Mode Controller
28
close to the MAX5037.
capacitor, upper switching MOSFET, inductor, and
output capacitor back to the input capacitor nega-
tive terminal.
ing MOSFET, inductor, output capacitor, and return
to the source of the lower MOSFET.
MOSFETs and on the same side of the PC board.
them at one single point close to the negative termi-
nal of the input filter capacitor.
close to each other to minimize the loop area.
Similarly, run the remote voltage sense lines
SENSE+ and SENSE- close to each other. Do not
cross these critical signal lines through power cir-
cuitry. Sense the current right at the pads of cur-
rent-sense resistors.
tors, driver output of the MAX5037, MOSFET gates
and PGND pin. Minimize the loop formed by the
V
capacitor, MAX5037, and upper MOSFET gate.
board for proper heat dissipation.
switching MOSFETs, inductor, and sense resistors
to aid in thermal dissipation.
tance and resistance to a minimum. Thin copper PC
boards can compromise efficiency since high cur-
rents are involved in the application. Also, thicker
copper conducts heat more effectively, thereby
reducing thermal impedance.
______________________________________________________________________________________
DD
bypass capacitors, bootstrap diode, bootstrap
IN
, V
CC,
and V
DD
PC Board Layout
bypass capacitors
DD
bypass capaci-
TRANSISTOR COUNT: 5431
PROCESS: BiCMOS
OVPOUT 8
SENSE+ 10
SENSE- 11
PGOOD 9
*CONNECT THE QFN EXPOSED PAD TO SGND GROUND PLANE
OVPIN 6
SGND 5
CLP1 7
VID3 1
VID2 2
VID1 3
VID0 4
44 43 42 41
12 13 14 15 16 17 18 19 20 21 22
MQFP/QFN*
40
MAX5037
39
Pin Configuration
Chip Information
38 37 36 35 34
33
32
31
30
29
28
27
26
25
24
23
N.C
DH2
LX2
DL2
PGND
IN
V
V
DL1
LX1
DH1
CC
DD