Datasheet > MAX5986B

MAX5986B

更新时间： 2024-02-16 02:23:21

品牌	Logo	应用领域
美信 - MAXIM		转换器光电二极管
页数	文件大小	规格书
24页	2115K
描述
IEEE 802.3af-Compliant, High-Efficiency, Class 1/Class 2, PDs with Integrated DC-DC Converter

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MAX5986B 技术参数

是否无铅：	不含铅	是否Rohs认证：	符合
生命周期：	Active	包装说明：	HQCCN,
Reach Compliance Code：	compliant	ECCN代码：	EAR99
HTS代码：	8542.39.00.01	Factory Lead Time：	15 weeks
风险等级：	2.27	其他特性：	OUTPUT IN ADJUSTABLE MODE IS 5.4V TO 5.6V
模拟集成电路 - 其他类型：	SWITCHING REGULATOR	控制模式：	CURRENT-MODE
控制技术：	PULSE WIDTH MODULATION	最大输入电压：	60 V
最小输入电压：	8.7 V	标称输入电压：	48 V
JESD-30 代码：	S-XQCC-N16	湿度敏感等级：	1
功能数量：	1	端子数量：	16
最高工作温度：	85 °C	最低工作温度：	-40 °C
最大输出电流：	0.36 A	封装主体材料：	UNSPECIFIED
封装代码：	HQCCN	封装形状：	SQUARE
封装形式：	CHIP CARRIER, HEAT SINK/SLUG	峰值回流温度（摄氏度）：	NOT SPECIFIED
表面贴装：	YES	切换器配置：	BUCK
最大切换频率：	475 kHz	技术：	BICMOS
温度等级：	INDUSTRIAL	端子形式：	NO LEAD
端子位置：	QUAD	处于峰值回流温度下的最长时间：	NOT SPECIFIED
Base Number Matches：	1

MAX5986B 数据手册

EVALUATION KIT AVAILABLE

MAX5986A/MAX5986B/MAX5987A

IEEE 802.3af-Compliant, High-Efficiency, Class 1/

Class 2, PDs with Integrated DC-DC Converter

General Description

Benefits and Features

The MAX5986A/MAX5986B/MAX5987A provide a com-

plete power-supply solution as IEEE 802.3af-compliant

S IEEE 802.3af Compliant

S PoE Class 1/Class 2 Classification

S Simplified Wall Adapter Interface

S Intelligent MPS

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 MAX5986A/MAX5986B

include sleep and ultra-low power modes.

S Sleep and Ultra-Low-Power Mode (MAX5986A/

MAX5986B)

S Efficient, Integrated DC-DC Converter (with

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/

MAX5987A) operating current limit.

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 Switching Frequency

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 volt-

age range from 8.7V to 60V and supports up to 3.84W

(MAX5986A) or 6.49W (MAX5986B/MAX5987A) of input

power. The MAX5986A operates at a fixed 275kHz

switching frequency, while the MAX5986B/MAX5987A

operate at a fixed 215kHz switching frequency. The

DC-DC converter operates at a fixed 275kHz switch-

ing frequency, with an efficiency-boosting frequency

foldback that reduces the switching frequency by half at

light loads.

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

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.

(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

IEEE is a registered service mark of the Institute of Electrical

and Electronics Engineers, Inc.

The MAX5986A/MAX5986B/MAX5987A are available in a

16-pin, 5mm x 5mm, TQFN power package and operate

over the -40°C to +85°C temperature range.

WiMAX is a registered certification mark and registered service

mark of WiMAX Forum.

Applications

IEEE 802.3af-Powered Devices

IP Phones

Ordering Information appears at end of data sheet.

Wireless Access Nodes

IP Security Cameras

For related parts and recommended products to use with this part,

refer to www.maximintegrated.com/MAX5986A/MAX5987A.related.

WiMAX Base Stations

For pricing, delivery, and ordering information, please contact Maxim Direct at

1-888-629-4642, or visit Maxim Integrated’s website at www.maximintegrated.com.

19-6261; Rev 1; 12/12

12 3 4 5 6 7...24

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与MAX5986B相关器件

型号	品牌	获取价格	描述	数据表
MAX5986BETE+	MAXIM	获取价格	IEEE 802.3af-Compliant, High-Efficiency, Class 1/Class 2, PDs with Integrated DC-DC Conver
MAX5986C	ADI	获取价格	兼容于IEEE 802.3af的高效、Class 1//Class 2 PD，内置DC-D
MAX5986CETE+	MAXIM	获取价格	Switching Regulator,
MAX5987A	MAXIM	获取价格	IEEE 802.3af-Compliant, High-Efficiency, Class 1,Powered Devices with Integrated DC-DC Con
MAX5987A	ADI	获取价格	兼容于IEEE 802.3af的高效、Class 1//Class 2 PD，内置DC-D
MAX5987AETE	MAXIM	获取价格	IEEE 802.3af-Compliant, High-Efficiency, Class 1,Powered Devices with Integrated DC-DC Con
MAX5987AETE+	MAXIM	获取价格	IEEE 802.3af-Compliant, High-Efficiency, Class 1,Powered Devices with Integrated DC-DC Con
MAX5987AETE+T	MAXIM	获取价格	Switching Regulator, BICMOS, PQCC16,
MAX5988	MAXIM	获取价格	High Efficiency During Light Loads Reduces Power Consumption
MAX5988A	MAXIM	获取价格	High Efficiency During Light Loads Reduces Power Consumption

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