参数资料
型号: MAX1541ETL+T
厂商: Maxim Integrated Products
文件页数: 44/49页
文件大小: 0K
描述: IC REG CTRLR DIVIDER PWM 40-TQFN
产品培训模块: Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
标准包装: 2,500
PWM 型: 电流模式
输出数: 2
频率 - 最大: 620kHz
占空比: 100%
电源电压: 2 V ~ 28 V
降压:
升压:
回扫:
反相:
倍增器:
除法器:
Cuk:
隔离:
工作温度: -40°C ~ 85°C
封装/外壳: 40-WFQFN 裸露焊盘
包装: 带卷 (TR)
Dual Step-Down Controllers with Saturation
Protection, Dynamic Output, and Linear Regulator
VIA TO POWER
GROUND
CONNECT THE
EXPOSED PAD TO
ANALOG GROUND
CONNECT GND
AND PGND TO THE
CONTROLLER AT
ONE POINT ONLY
AS SHOWN
VIA TO V CC
BYPASS CAPACITOR
MAX1540A
TOP LAYER
VIA TO REF
BYPASS CAPACITOR
VIA TO V CC PIN
MAX1540A
BOTTOM LAYER
VIA TO REF PIN
KELVIN-SENSE VIAS
UNDER THE SENSE RESISTOR
(REFER TO EVALUATION KIT)
INDUCTOR
DUAL
N-CHANNEL
MOSFET
SINGLE
N-CHANNEL
MOSFETS
INDUCTOR
C OUT
DH
LX
DL
C IN
C OUT
OUTPUT
INPUT
C OUT
C IN
INPUT
GROUND
OUTPUT
GROUND
HIGH-POWER LAYOUT
Figure 19. PC Board Layout
3) Group the gate-drive components (BST_ diode and
capacitor, V DD bypass capacitor) together near the
controller IC.
4) Make the DC-DC controller ground connections as
shown in Figures 1 and 12. This diagram can be
viewed as having two separate ground planes:
power ground, where all the high-power compo-
nents go, and an analog ground plane for sensitive
analog components. The analog ground plane and
power ground plane must meet only at a single
point directly at the IC.
LOW-POWER LAYOUT
5) Connect the output power planes directly to the out-
put filter capacitor positive and negative terminals
with multiple vias. Place the entire DC-DC converter
circuit as close to the load as is practical.
Chip Information
TRANSISTOR COUNT: 8612
PROCESS: BiCMOS
44
______________________________________________________________________________________
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