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| 型号： | MAX16946GTE/V+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 12/21页 |
| 文件大小： | 0K |
| 描述： | IC REG LDO/SWITCH ADJ 16TQFN |
| 其它有关文件： | Automotive Product Guide |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 75 |
| 应用： | 汽车系统，远程电源 |
| 电流 - 电源： | 2.1mA |
| 电源电压： | 4.5 V ~ 18 V |
| 工作温度： | -40°C ~ 105°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（4x4） |
| 包装： | 管件 |
MAX16946/MAX16947
Remote Antenna, Current-Sense and
LDO/Switches
Load Protection
The devices monitor the load current through an external
sense resistor and perform the following actions:
U If the monitored current is lower than the set open-
load current, the devices signal that there is an open-
load (see the Open Load section).
U If the monitored current is greater than the set short-
circuit current (I SC ), the devices enter the short-
circuit mode (see the Short Circuit and Current Limit
section).
The devices also perform a short-to-battery detection
before the internal switch turns on. During normal opera-
tion, reverse-current detection protects the devices from
short-to-battery events (see the Short-to-Battery and
Reverse-Current Detection section).
In addition, thermal shutdown protects the devices from
overheating (see the Thermal Shutdown section).
Two open-drain fault indicator outputs ( OL and SC ) and the
AOUT voltage indicate the devices’ status (Table 1).
Open Load
If the load current drops below the open-load cur-
rent threshold, the OL output latches low. An open-
load condition does not turn off the internal switch. To
unlatch the OL output, pulse SHDN low for less than
t SHDN_OFF (150 F s min). Keeping SHDN low for longer than
t SHDN_OFF shuts down the device.
The open-load current threshold is adjustable. Connect
a resistive divider between REF, the open-load current
threshold adjustment input (OLT), and GND to set the
Short Circuit and Current Limit
If the load current exceeds the set short-circuit cur-
rent threshold (I SC ), the t BLANK timer begins counting.
During this period, the load current is limited to the
current limit set by the voltage at LIM. If the overcurrent
condition persists beyond t BLANK , SC asserts low and
the internal switch turns off. The timer resets if the over-
current condition disappears before the blanking time
(t BLANK ) has elapsed.
If the switch is turned off at the end of t BLANK , a retry
timer (t RETRY ) starts immediately after the blanking time
has elapsed, and during that time the switch stays off.
At the end of t RETRY , the switch turns on again while
SC stays low. If the fault still exists, the cycle repeats. If
the fault has been removed, the switch stays on and SC
goes high after the blanking time t BLANK . During retry
when the switch is off, the current through the switch is
zero. Blanking time and retry time have fixed values of
100ms (min) and 1100ms (min), respectively.
Figures 1–4 show the response of the devices to the
presence and removal of overcurrent conditions.
The current-limit threshold is adjustable. Connect a
resistive divider between REF, the current-limit setting
input (LIM), and GND to set the current-limit threshold.
Alternatively, externally drive LIM (not to exceed 3.65V)
to set the current-limit threshold (see the Current-Limit
Threshold Selection section).
The short-circuit current threshold depends on the value
of the sense resistor and is calculated as follows:
open-load current threshold (see the Open-Load Current
Threshold Selection section).
I SC =
1.3V
R SENSE × A V
where A V is the gain of the internal current-sense ampli-
fier and is equal to 26V/V and R SENSE is the sense resis-
tor value.
12
Maxim Integrated
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX16946GUE/V+ | 功能描述:电源开关 IC - 配电 Remote Antenna Current-Sense 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 |
| MAX16946GUE/V+T | 功能描述:电源开关 IC - 配电 Remote Antenna Current-Sense 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 |
| MAX16947GEE/V+ | 功能描述:电源开关 IC - 配电 Remote Antenna Current-Sense 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 |
| MAX16947GEE/V+T | 功能描述:电源开关 IC - 配电 Remote Antenna Current-Sense 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 |
| MAX16948AGEE/V+ | 制造商:Maxim Integrated Products 功能描述:AUTOMOTIVE DUAL REMOTE ANTENNA CURRENT-SENSE LDO/SWITCH - Rail/Tube |
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