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参数资料
| 型号： | MAX8649BEWE+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 30/31页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK SYNC ADJ 1.8A 16WLP |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| 类型： | 降压（降压） |
| 输出类型： | 可调式 |
| 输出数： | 1 |
| 输出电压： | 0.75 V ~ 1.38 V |
| 输入电压： | 2.5 V ~ 5.5 V |
| 频率 - 开关： | 3.25MHz |
| 电流 - 输出： | 1.8A |
| 同步整流器： | 是 |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 16-UFBGA，WLCSP |
| 包装： | 带卷 (TR) |
| 供应商设备封装： | 16-WLP（2x2） |
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1.8A Step-Down Regulator with
Remote Sense in 2mm x 2mm WLP
Input Capacitor Selection
The input capacitor in a step-down DC-DC regulator
reduces current peaks drawn from the battery or other
input power source and reduces switching noise in the
controller. A 10μF ceramic capacitor in parallel with a
0.1μF ceramic capacitor is recommended for most appli-
cations. The impedance of the input capacitor at the
switching frequency should be less than that of the input
source so that high-frequency switching currents do not
pass through the input source. The input capacitor must
meet the input ripple-current requirement imposed by
the step-down regulator. Ceramic capacitors are pre-
ferred due to their resilience to power-up surge currents.
Choose the input capacitor so that the temperature rises
due to input ripple current do not exceed approximately
+10°C. For a step-down DC-DC regulator, the maximum
input ripple current is 1/2 of the output. This maximum
input ripple current occurs when the step-down regulator
operates at 50% duty factor (V IN = 2 x V OUT ). Refer to
the MAX8649 Evaluation Kit data sheet for specific input
capacitor recommendations.
Output Capacitor Selection
The step-down DC-DC regulator output capacitor
keeps output ripple small and ensures control-loop
stability. A 10μF ceramic capacitor in parallel with a
0.1μF ceramic capacitor is recommended for most
applications. The output capacitor must also have low
impedance at the switching frequency. Ceramic, poly-
mer, and tantalum capacitors are suitable, with ceramic
exhibiting the lowest ESR and lowest high-frequency
impedance.
Output ripple due to capacitance (neglecting ESR) is
approximately:
Power Dissipation
The ICs have a thermal-shutdown feature that protects
the IC from damage when the die temperature exceeds
+160°C. See the Thermal-Overload Protection section
for more information. To prevent thermal overload and
allow the maximum load current on each regulator, it is
important to ensure that the heat generated by the ICs
can be dissipated into the PCB.
When properly mounted on a multilayer PCB, the junc-
tion-to-ambient thermal resistance ( θ JA ) is typically
76°C/W.
PCB Layout
Due to fast switching waveforms and high current paths,
careful PCB layout is required to achieve optimal perfor-
mance. Due to fast switching waveforms and high cur-
rent paths, careful PCB layout is required to achieve
optimal performance. Minimize trace lengths between
the ICs and the inductor, the input capacitor, and the
output capacitor; keep these traces short, direct, and
wide. The ground connections of C IN and C OUT should
be as close together as possible and connected to
PGND. Connect AGND and PGND directly to the ground
plane. The MAX8649 Evaluation Kit illustrates an exam-
ple PCB layout and routing scheme. Special care should
be taken when routing the remote sense signals. Use a
wide SNS+ trace to minimize parasitic inductance in the
SNS+ feedback trace. Do not use vias on the SNS+
trace because they introduce additional inductance.
Connect SNS- to the local AGND plane for the ICs.
Chip Information
PROCESS: BiCMOS
V RIPPLE =
I L ( PEAK )
2 π × f OSC × C OUT
Package Information
For the latest package outline information and land patterns
(footprints), go to www.maxim-ic.com/packages . Note that a
Additional ripple due to capacitor ESR is:
V RIPPLE ( ESR ) = I L ( PEAK ) × ESR
“+”, “#”, or “-” in the package code indicates RoHS status only.
Package drawings may show a different suffix character, but
the drawing pertains to the package regardless of RoHS status.
PACKAGE PACKAGE OUTLINE LAND
Refer to the MAX8649 Evaluation Kit data sheet for spe-
cific output capacitor recommendations.
TYPE
16 WLP
0.5mm Pitch
CODE
W162B2+1
NO.
PATTERN NO.
30
______________________________________________________________________________________
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX8649EVKIT+ | 制造商:Maxim Integrated Products 功能描述:1.8A STEP-DOWN REGULATOR W/DIFFERENTIAL REMOTE SENSE IN 2MM - Boxed Product (Development Kits) |
| MAX8649EWE+ | 制造商:Maxim Integrated Products 功能描述:1.8A STEP-DOWN REGULATOR W/DIFFEREN - Rail/Tube |
| MAX8649EWE+T | 功能描述:直流/直流开关调节器 1.8A Step-Down Regulator RoHS:否 制造商:International Rectifier 最大输入电压:21 V 开关频率:1.5 MHz 输出电压:0.5 V to 0.86 V 输出电流:4 A 输出端数量: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:PQFN 4 x 5 |
| MAX8649SEWE+T | 功能描述:直流/直流开关调节器 1.8A Step-Down Regulator RoHS:否 制造商:International Rectifier 最大输入电压:21 V 开关频率:1.5 MHz 输出电压:0.5 V to 0.86 V 输出电流:4 A 输出端数量: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:PQFN 4 x 5 |
| MAX864EEE | 功能描述:电荷泵 Dual-Output Charge Pump RoHS:否 制造商:Maxim Integrated 功能:Inverting, Step Up 输出电压:- 1.5 V to - 5.5 V, 3 V to 11 V 输出电流:100 mA 电源电流:1 mA 最大工作温度:+ 70 C 封装 / 箱体:SOIC-8 Narrow 封装:Tube |
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