MAX38640–MAX38643
Tiny 1.8V to 5.5V Input, 330nA I , 700mA
Q
nanoPower Buck Converter
PCB Layout and Routing
High switching frequencies and large peak currents make PCB layout a very important part of the buck regulator design.
Good design minimizes excessive electromagnetic interference (EMI) on the feedback paths and voltage gradients in the
ground plane to avoid instability and regulation errors. The input capacitor (C ) should be placed as close as possible
IN
to the IC pins IN and GND. Connect the inductor, C , and output capacitor (C
) as close together as possible, and
IN
OUT
keep their traces short, direct, and wide.
Connect the two GND pins under the IC and directly to the ground of C
. Keep noisy traces, such as the LX node, as
OUT
short as possible. The OUT pin should be connected to the output capacitor and this trace should be routed away from
the main power path between the inductor and C . The OUT trace should also be routed away from noisy traces such
OUT
as the LX line or other external noise sources. Refer to the MAX38640–MAX38643 evaluation kit for an example PCB
layout and routing scheme.
Ordering Information
OUTPUT
CURRENT
(mA)
ACTIVE
DISCHARGE
PART NUMBER
FEATURES
PACKAGE
MAX38640AELT+
175
350
350
700
175
350
350
700
175
175
175
350
350
700
175
350
700
350
175
175
175
700
350
175
Yes
Yes
No
MAX38641AELT+
0.7V to 3.3V Resistor-Selectable Output Voltage
Using R
Pin
MAX38642AELT+
SEL
MAX38643AELT+
Yes
Yes
Yes
No
MAX38640BELT+*
MAX38641BELT+*
MAX38642BELT+*
MAX38643BELT+*
MAX38640BELT18+T
MAX38640BELT21+T
MAX38640AENT+
MAX38641AENT+
MAX38642AENT+
MAX38643AENT+
MAX38640BENT+*
MAX38642BENT+*
MAX38643BENT+*
MAX38641BENT135+
MAX38640BENT06+T
MAX38640BENT065+T
MAX38640BENT21+T
MAX38643BENT185+T
MAX38641BENT12+T
MAX38640BENT18+T
6-pin, 2mm x 2mm
μDFN
0.5V to 5V Preprogrammed Output Voltage
Yes
Yes
Yes
Yes
Yes
No
1.8V Preprogrammed Output Voltage
2.1V Preprogrammed Output Voltage
0.7V to 3.3V Resistor-Selectable Output Voltage
Using R
Pin
SEL
Yes
Yes
No
0.5V to 5V Preprogrammed Output Voltage
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
0.4mm pitch, 6-pin
(2x3) WLP
1.35V Preprogrammed Output Voltage
0.6V Preprogrammed Output Voltage
0.65V Preprogrammed Output Voltage
2.1V Preprogrammed Output Voltage
1.85V Preprogrammed Output Voltage
1.2V Preprogrammed Output Voltage
1.8V Preprogrammed Output Voltage
*Future product—contact factory for availability.
+Denotes a lead(Pb)-free/RoHS-compliant package.
T = Tape and reel.
www.analog.com
Analog Devices | 17
5秒后页面跳转
STM32H743技术深度剖析与应用案例探索
LM321中文资料解析：引脚功能介绍、技术特点、技术特性分析
74HC14芯片资料介绍：性能特性分析、引脚介绍
LM1875芯片手册：功放参数分析、引脚说明、电路设计要点
微信公众号
抖音公众号
浙公网安备 33010502006866号 浙ICP备10014259号-119
营业执照ICP证
数据手册
如果您发现信息不准确，
