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| 型号： | MAX5986AETE+ |
| 厂商： | Maxim Integrated |
| 文件页数： | 1/23页 |
| 文件大小： | 843K |
| 描述： | IC POE SWITCH PSE 16TQFN |
| 标准包装： | 60 |
| 类型： | 以太网供电控制器 PD 开关（PoE） |
| 应用： | 供电设备（PSE） |
| 内部开关： | 是 |
| 电流限制： | 201mA |
| 电源电压： | 8.7 V ~ 60 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 16-WQFN 裸露焊盘 |
| 供应商设备封装： | 16-TQFN-EP（5x5） |
| 包装： | 管件 |
MAX5986AMAX5986C/MAX5987A
IEEE 802.3af-Compliant, High-Efficiency, Class 1/
Class 2, PDs with Integrated DC-DC Converter
19-6261; Rev 3; 1/14
Benefits and Features
S IEEE 802.3af Compliant
S PoE Class 1/Class 2 Classification
S Simplified Wall Adapter Interface
S Intelligent MPS
S Sleep and Ultra-Low-Power Mode (MAX5986A/
MAX5986B)
S Efficient, Integrated DC-DC Converter (with
Integrated Switches)
S 8.7V to 60V Wide Input Voltage Range
S 3.0V to 14V Programmable Output Voltage Range
S Internal Compensation
S Fixed 214kHz/275kHz /430kHz Switching
Frequency
S Frequency Foldback for High-Efficiency Light-
Load Operation
S Built-In Output-Voltage Monitoring
S Open-Drain RESET Output (MAX5987A)
S Protects Against Overload, Output Short Circuit,
Output Overvoltage, and Overtemperature
S Hiccup-Mode Runaway Current Limit
S Back-Bias Capability to Optimize the Efficiency
S Integrated TVS Diode Withstands Cable Discharge
Event (CDE)
S Internal LDO Regulator with Up to 100mA Load
(MAX5987A)
S Fixed 3.3V or Adjustable Output Voltage Through
an External Resistive Divider
S 49mA (typ) Inrush Current Limit
S Pass 2kV, 200m CAT-6 Cable Discharge Event
General Description
The MAX5986AMAX5986C/MAX5987A provide a com-
plete power-supply solution as IEEE
?/DIV>
802.3af-compliant
Class 1/Class 2 Powered Devices (PDs) in a Power-over-
Ethernet (PoE) system. The devices integrate the PD
interface with an efficient DC-DC converter, offering a low
external part count PD solution. The MAX5987A includes
a low-dropout regulator and the MAX5986AMAX5986C
include sleep and ultra-low power modes.
The PD interface provides a detection signature and
a Class 1/Class 2 classification signature with a single
external resistor. The PD interface also provides an
isolation power MOSFET, a 60mA (max) inrush current
limit, and a 201mA (MAX5986A) or 323mA (MAX5986B/
MAX5986C/MAX5987A) operating current limit.
The integrated step-down DC-DC converter uses a peak
current-mode control scheme and provides an easy-to-
implement architecture with a fast transient response. The
step-down converter operates in a wide input voltage range
from 8.7V to 60V and supports up to 3.84W (MAX5986A)
or 6.49W (MAX5986B/MAX5986C/MAX5987A) of input
power. The MAX5986A operates at a fixed 275kHz
switching frequency, while the MAX5986B/MAX5987A
operate at a fixed 215kHz switching frequency and the
MAX5986C operates at a fixed 430kHz switching fre-
quency. The DC-DC converter operates at a fixed switch-
ing frequency, with an efficiency-boosting frequency
foldback that reduces the switching frequency by half at
light loads.
The devices feature an input undervoltage-lockout
(UVLO) with wide hysteresis and long deglitch time
to compensate for twisted-pair cable resistive drop
and to assure glitch-free transition during power-on/-off
conditions. The devices also feature overtemperature
shutdown, short-circuit protection, output overvoltage
protection, and hiccup current limit for enhanced perfor-
mance and reliability.
The MAX5986AMAX5986C/MAX5987A are available in
a 16-pin, 5mm x 5mm, TQFN power package and oper-
ate over the -40癈 to +85癈 temperature range.
IEEE is a registered service mark of the Institute of Electrical
and Electronics Engineers, Inc.
WiMAX is a registered certification mark and registered service
mark of WiMAX Forum.
Ordering Information appears at end of data sheet.
For related parts and recommended products to use with this part,
refer to www.maximintegrated.com/MAX5986A/MAX5987A.related.
Applications
IEEE 802.3af-Powered Devices
IP Phones
Wireless Access Nodes
IP Security Cameras
WiMAX
?/DIV>
Base Stations
EVALUATION KIT AVAILABLE
For pricing, delivery, and ordering information, please contact Maxim Direct at
1-888-629-4642, or visit Maxim Integrateds website at www.maximintegrated.com.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX5986AETE+ | 功能描述:直流/直流开关转换器 IEEE802.3 af PD w/ DC/DC Conv RoHS:否 制造商:STMicroelectronics 最大输入电压:4.5 V 开关频率:1.5 MHz 输出电压:4.6 V 输出电流:250 mA 输出端数量:2 最大工作温度:+ 85 C 安装风格:SMD/SMT |
| MAX5986AETE+T | 功能描述:直流/直流开关转换器 IEEE802.3 af PD w/ DC/DC Conv RoHS:否 制造商:STMicroelectronics 最大输入电压:4.5 V 开关频率:1.5 MHz 输出电压:4.6 V 输出电流:250 mA 输出端数量:2 最大工作温度:+ 85 C 安装风格:SMD/SMT |
| MAX5986BETE+ | 功能描述:以太网 IC IEEE802.3 AF HI EFFICIENCY PD RoHS:否 制造商:Micrel 产品:Ethernet Switches 收发器数量:2 数据速率:10 Mb/s, 100 Mb/s 电源电压-最大:1.25 V, 3.45 V 电源电压-最小:1.15 V, 3.15 V 最大工作温度:+ 85 C 封装 / 箱体:QFN-64 封装:Tray |
| MAX5986BETE+T | 功能描述:PMIC 解决方案 IEEE802.3 AF HI EFFICIENCY PD RoHS:否 制造商:Texas Instruments 安装风格:SMD/SMT 封装 / 箱体:QFN-24 封装:Reel |
| MAX5986EVKIT# | 功能描述:电源管理IC开发工具 MAX5986 Eval Kit RoHS:否 制造商:Maxim Integrated 产品:Evaluation Kits 类型:Battery Management 工具用于评估:MAX17710GB 输入电压: 输出电压:1.8 V |
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