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参数资料
| 型号： | MAX4829ELT+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 8/11页 |
| 文件大小： | 0K |
| 描述： | IC SWITCH 1X1 6UTDFN |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| 功能： | 开关 |
| 电路： | 1 x 1:1 |
| 导通状态电阻： | 1 欧姆 |
| 电压电源： | 单电源 |
| 电压 - 电源，单路/双路(±)： | 2.3 V ~ 5.5 V |
| 电流 - 电源： | 120µA |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 6-WFDFN |
| 供应商设备封装： | 6-uDFN（1.5x1.0） |
| 包装： | 带卷 (TR) |
MAX4826–MAX4831
Detailed Description
The MAX4826–MAX4831 are forward-/reverse-current-
limited switches that operate from a +2.3V to +5.5V
input voltage range and guarantee a 50mA and 100mA
minimum current-limit threshold for different options.
The voltage drop across an internal sense resistor is
compared to two reference voltages to indicate a for-
ward- or reverse-current-limit fault. When the load cur-
rent exceeds the preset current limit for greater than
the fault-blanking time, the switch opens.
The MAX4827/MAX4829/MAX4831 have an autoretry
function that turns on the switch again after an internal
retry time expires. If the faulty load condition is still pre-
sent after the blanking time, the switch turns off again
and the cycle is repeated. If the faulty load condition is
not present, the switch remains on.
The MAX4826/MAX4828/MAX4830 do not have the
autoretry option, and the switch remains in latchoff mode
until ON or the input power is cycled from high to low
and then high again.
The undervoltage lockout (UVLO) circuit prevents erro-
neous switch operation when the input voltage goes too
low during startup conditions.
Reverse-Current Protection
The MAX4826–MAX4831 limit the reverse current (VOUT
to VIN) from exceeding the maximum IREV value. The
switch is shut off and FFLG is asserted if the reverse-
current-limit condition persists for more than the blank-
ing time. This feature prevents excessive reverse cur-
rents from flowing through the device.
Switch-On/Off Control
Toggle ON high to enable the current-limited switches.
The switches are continuously on only if VIN exceeds
the UVLO threshold (typically 2V) and there is no fault.
When a forward-/reverse-current fault is present or the
die exceeds the thermal-shutdown temperature of
+150°C, OUT is internally disconnected from IN, and
the supply current decreases to 8A (latchoff). The
switch is now operating in one of its off states. The
switch off state also occurs when driving ON low, thus
reducing the supply current (shutdown) to 0.01A.
Table 1 illustrates the ON/OFF state of the MAX4826–
MAX4831 current-limit switches.
50mA/100mA Current-Limit Switches with
NO-LOAD Flag in DFN
6
_______________________________________________________________________________________
Pin Description
PIN
NAME
FUNCTION
1
IN
Input. Bypass IN with a 0.1F ceramic capacitor to ground.
2
GND
Ground
3
OUT
Switch Output. Bypass OUT with a 0.1F capacitor to ground
4
FFLG
Current-Limit Fault Output. FFLG is an open-drain output. FFLG goes low when the device stays in
forward- or reverse-current limit for more than the blanking time period. FFLG is high impedance
when a fault is not present or when ON is low.
5
NOLD
No-Load Flag Output. NOLD is an open-drain output. NOLD goes low when a load of less than 10mA
(MAX4826–MAX4829) or 5mA (MAX4830/MAX4831) is delivered to the output. NOLD is high
impedance when a fault is not present or when ON is low.
6
ON
Active-High Switch-On Input. Drive ON high to turn the switch on.
ON
FAULT
SWITCH ON/OFF
SUPPLY CURRENT MODE
Low
X
OFF
Shutdown
High
Undervoltage lockout
OFF
Latchoff
High
Thermal
OFF immediately (tBLANK period does not apply).
Latchoff
OFF after tBLANK period has elapsed.
Latchoff
High
Current limit
ON during tBLANK period, OFF during tRETRY period for the
MAX4827/MAX4829/MAX4831. Cycle repeats until fault is
removed.
See the Autoretry (MAX4827/
MAX4829/MAX4831) section
Table 1. MAX4826–MAX4831 Switch Truth Table
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX4830ELT | 制造商:Maxim Integrated Products 功能描述:50MA/100MA CURRENT-LIMIT SWITCHES W - Rail/Tube |
| MAX4830ELT/V+ | 制造商:Maxim Integrated Products 功能描述:50MA/100MA CURRENT-LIMIT SWITCHES W - Rail/Tube |
| MAX4830ELT/V+T | 功能描述:电源开关 IC - 配电 50mA/100mA Current Limit Switch 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 |
| MAX4830ELT+ | 制造商:Maxim Integrated Products 功能描述:50MA/100MA CURRENT-LIMIT SWITCHES WITH NO-LOAD FLAG - Rail/Tube |
| MAX4830ELT+T | 功能描述:电源开关 IC - 配电 50mA/100mA Current Limit Switch 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 |
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