参数资料
型号: NCP1529MUTBG
厂商: ON Semiconductor
文件页数: 14/16页
文件大小: 0K
描述: IC REG BUCK SYNC ADJ 1A 6UDFN
标准包装: 1
类型: 降压(降压)
输出类型: 可调式
输出数: 1
输出电压: 0.9 V ~ 3.9 V
输入电压: 2.7 V ~ 5.5 V
PWM 型: 电流模式
频率 - 开关: 1.7MHz
电流 - 输出: 1A
同步整流器:
工作温度: -40°C ~ 85°C
安装类型: 表面贴装
封装/外壳: 6-UDFN 裸露焊盘
包装: 标准包装
供应商设备封装: 6-uDFN(2x2)
其它名称: NCP1529MUTBGOSDKR
NCP1529
LAYOUT CONSIDERATIONS
Electrical Layout Considerations
Implementing a high frequency DC ? DC converter
requires respect of some rules to get a powerful portable
application. Good layout is key to prevent switching
regulators to generate noise to application and to
themselves.
Electrical layout guide lines are:
? Use short and large traces when large amount of current
is flowing.
? Keep the same ground reference for input and output
capacitors to minimize the loop formed by high current
path from the battery to the ground plane.
? Isolate feedback pin from the switching pin and the
current loop to protect against any external parasitic
signal coupling. Add a feed ? forward capacitor between
V OUT and FB which adds a zero to the loop and
participates to the good loop stability. A 18 pF
capacitor is recommended to meet compensation
requirements.
A four layer PCB with a ground plane and a power plane
will help NCP1529 noise immunity and loop stability.
Thermal Layout Considerations
High power dissipation in small package leads to thermal
consideration such as:
? Enlarge V IN trace and added several vias connected to
power plane.
? Connect GND pin to top plane.
? Join top, bottom and each ground plane together using
several free vias in order to increase radiator size.
For high ambient temperature and high power dissipation
requirements, UDFN6 package using exposed pad
connected to main radiator is recommended. Refer to
Notes 7, 8, and 9.
V IN Trace
V OUT
Trace
SW
FB Trace
EN Trace
SW
Trace
Trace
V IN Trace
FB Trace
V OUT
Trace
GND Plane
EN Trace
GND Plane
Figure 30. TSOP ? 5 Recommended Board Layout
ORDERING INFORMATION
Nominal
Figure 31. UDFN6 Recommended Board Layout
Device
NCP1529ASNT1G
NCP1529MUTBG
NCP1529MU12TBG
NCP1529MU135TBG
Output Voltage
Adj
Adj
1.2 V
1.35 V
Marking
DXJ
TL
TC
RC
Package
TSOP ? 5
UDFN6
Shipping ?
3000 / Tape & Reel
3000 / Tape & Reel
?For information on tape and reel specifications, including part orientation and tape sizes, please refer to our Tape and Reel Packaging
Specifications Brochure, BRD8011/D.
http://onsemi.com
14
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