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| 型号： | MAX4915BELT+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： | 400 毫欧 |
| 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) |
MAX4914B/MAX4915A/B/MAX4917A/B
Detailed Description
The MAX4914B/MAX4915A/B/MAX4917A/B are for-
ward/reverse current-limited switches that operate from
a +2.3V to +5.5V input voltage range and guarantee a
100mA, 200mA, and 300mA minimum current-limit
threshold for different options. The voltage drop across
an internal sense resistor is compared to two reference
voltages to indicate a forward or reverse current-limit
fault. When the load current exceeds the preset current
limit for greater than the fault-blanking time, the switch
opens and
FLAG asserts.
The MAX4915A/MAX4917A have an autoretry function
that turns on the switch again after an internal retry time
expires. If the faulty load condition is still present after
the blanking time, the switch turns off again and the
cycle is repeated. If the faulty load condition is not pre-
sent, the switch remains on. During this retry time,
FLAG remains low until the fault is removed.
The MAX4914B/MAX4915B/MAX4917B do not have the
autoretry option, and the switch remains in latchoff
mode until the ON pin 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.
Reverse Current Protection
All devices limit the reverse current (VOUT to VIN) from
exceeding the maximum IREV value. The switch is shut off
and
FLAG is asserted if the reverse current-limit condition
persists for more than the blanking time. This feature pre-
vents excessive reverse currents from flowing through the
device to the source. When the device is in shutdown
(VON < VIL), the current from OUT to IN does not exceed
1A (max).
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 (typ). Table 1 illustrates the
ON/OFF state.
FLAG Indicator
All devices feature a latched fault output,
FLAG.
Whenever a fault is activated, it latches the
FLAG out-
put low and also turns the switch off.
FLAG is an open-
100mA/200mA/300mA Current-Limit Switches
with Low Shutdown Reverse Current
6
_______________________________________________________________________________________
N
BLANKING TIME
CIRCUITRY
REVERSE CURRENT
DETECTOR
FORWARD CURRENT
DETECTOR
N
+2.0V
FLAG
OUT
IN
ON
GND
LOGIC
AUTO-
RETRY
MAX4914B
MAX4915A/B
MAX4917A/B
UNDERVOLTAGE
LOCKOUT
Figure 1. Functional Diagram
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX4915BEUK+T | 功能描述:电源开关 IC - 配电 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 |
| MAX4916AELT+T | 功能描述:电源开关 IC - 配电 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 |
| MAX4916BELT+T | 功能描述:电源开关 IC - 配电 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 |
| MAX4917AELT+ | 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述: |
| MAX4917AELT+T | 功能描述:电源开关 IC - 配电 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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