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参数资料
| 型号： | MAX4987AEETA+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 8/10页 |
| 文件大小： | 0K |
| 描述： | IC CTLR OVP USB ESD PROT 8TDFN |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 1 |
| 类型： | 过压保护控制器 |
| 应用： | 手机、媒体播放器 |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-WFDFN 裸露焊盘 |
| 供应商设备封装： | 8-TDFN-EP（2x3） |
| 包装： | 标准包装 |
| 其它名称： | MAX4987AEETA+TDKR |
Overvoltage Lockout (OVLO)
The MAX4987AE/MAX4987BE have a 6.15V (typ) over-
voltage threshold (OVLO). When VIN is greater than
VOVLO, ACOK is high impedance.
ACOK
ACOK is an active-low open-drain output that asserts
low when VUVLO < VIN < VOVLO following the 30ms
(typ) debounce period. Connect a pullup resistor from
ACOK to the logic I/O voltage of the host system.
During a short-circuit fault,
ACOK may deassert due to
VIN not being in the valid operating voltage range.
Thermal-Shutdown Protection
The MAX4987AE/MAX4987BE feature thermal-shutdown
circuitry. The internal nFET switch turns off when the
junction temperature exceeds TSHDN and immediately
goes into a fault mode. The device exits thermal shut-
down after the junction temperature cools by +40°C (typ).
Applications Information
IN Bypass Capacitor
For most applications, bypass IN to GND with a 1F
ceramic capacitor as close to the device as possible to
enable ±15kV HBM ESD protection on IN. If ±15kV HBM
ESD protection is not required, there is no capacitor
required at IN. If the power source has significant induc-
tance due to long lead length, take care to prevent over-
shoots due to the LC tank circuit and provide protection if
necessary to prevent exceeding the absolute maximum
rating on IN.
ESD Test Conditions
ESD performance depends on a number of conditions.
The MAX4987AE/MAX4987BE are specified for ±15kV
HBM ESD protection on the CD+, CD-, and IN pins
when IN is bypassed to ground with a 1F ceramic
capacitor. The CD+ and CD- inputs are also protected
against ±15kV Air Gap and ±6kV contact IEC 61000-4-
2 ESD events.
Human Body Model
Figure 3 shows the Human Body Model, and Figure 4
shows the current waveform it generates when dis-
charged into a low impedance. This model consists of
a 100pF capacitor charged to the ESD voltage of inter-
est, that is then discharged into the device through a
1.5kΩ resistor.
IEC 61000-4-2
The IEC 61000-4-2 standard covers ESD testing and per-
formance of finished equipment. It does not specifically
refer to integrated circuits. The MAX4987AE/ MAX4987BE
MAX4987AE/MAX4987BE
Overvoltage-Protection Controller
with USB ESD Protection
_______________________________________________________________________________________
7
nFET SWITCH
ON
nFET SWITCH
ON
SWITCH OFF
CURRENT
THROUGH
nFET SWITCH
ILIM
tOFF
tRETRY
Figure 2. Autoretry Timing Diagram
CHARGE CURRENT-
LIMIT RESISTOR
DISCHARGE
RESISTANCE
STORAGE
CAPACITOR
Cs
100pF
RC
1M
Ω
RD
1.5k
Ω
HIGH-
VOLTAGE
DC
SOURCE
DEVICE
UNDER
TEST
Figure 3. Human Body ESD Test Model
IP 100%
90%
36.8%
tRL
TIME
tDL
CURRENT WAVEFORM
PEAK-TO-PEAK RINGING
(NOT DRAWN TO SCALE)
Ir
10%
0
AMPERES
Figure 4. Human Body Current Waveform
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX4987AETA+T | 功能描述:电源开关 IC - 配电 Overvoltage-Protect Controller RoHS:否 制造商:Exar 输出端数量:1 开启电阻（最大值）:85 mOhms 开启时间（最大值）:400 us 关闭时间（最大值）:20 us 工作电源电压:3.2 V to 6.5 V 电源电流（最大值）: 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:SOT-23-5 |
| MAX4989ETD+T | 功能描述:电源开关 IC - USB USB 2.0 2 of 4 Crosspoint Switch RoHS:否 制造商:Micrel 电源电压-最小:2.7 V 电源电压-最大:5.5 V 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:SOIC-8 封装:Tube |
| MAX4989EVKIT+ | 功能描述:交换机 IC 开发工具 MAX4989 Eval Kit RoHS:否 制造商:Maxim Integrated 产品:Evaluation Kits 类型:USB Power Switches 工具用于评估:MAX4984E 工作电源电压:2.8 V to 5.5 V |
| MAX498CWI | 功能描述:多路器开关 IC RoHS:否 制造商:Texas Instruments 通道数量:1 开关数量:4 开启电阻（最大值）:7 Ohms 开启时间（最大值）: 关闭时间（最大值）: 传播延迟时间:0.25 ns 工作电源电压:2.3 V to 3.6 V 工作电源电流: 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:UQFN-16 |
| MAX498CWI+ | 功能描述:多路器开关 IC RoHS:否 制造商:Texas Instruments 通道数量:1 开关数量:4 开启电阻（最大值）:7 Ohms 开启时间（最大值）: 关闭时间（最大值）: 传播延迟时间:0.25 ns 工作电源电压:2.3 V to 3.6 V 工作电源电流: 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:UQFN-16 |
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