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参数资料
| 型号： | MAX16946GTE/V+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 15/21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： | 2,500 |
| 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： | 带卷 (TR) |
MAX16946/MAX16947
Remote Antenna, Current-Sense and
LDO/Switches
Short-to-Battery and Reverse-Current Detection
It is possible for OUT to be shorted to the battery due to
a fault in the system. The devices detect this failure by
comparing the OUT voltage and the IN voltage before
the switch turns on. Every time the switch turns on, such
as at the end of the retry time, or once the thermal shut-
down condition disappears, the short-to-battery detec-
tion is performed. At this point, if the device detects the
short-to-battery fault, the switch stays off and both SC
and OL assert low (Table 1).
Series inductance and the output capacitor can produce
ringing during a short-circuit condition, resulting in an
output voltage that temporarily exceeds the input volt-
age. Blanking is implemented during and immediately
after a short-circuit event to prevent false triggering of
the reverse-current detection. The reverse-current blank-
ing time (t REV_BLANK ) is 16ms (typ). If the reverse cur-
rent produces a V SENSE (V IN - V SENSE ) less than -7.7mV
(typ) for a duration greater than the blanking time, the
device latches off the switch and both SC and OL assert
low.
Thermal Shutdown
Thermal-shutdown circuitry protects the devices from
overheating. The switch turns off immediately when the
junction temperature exceeds +170 N C (typ) (Table 1).
The switch turns on again after the device temperature
drops by approximately +15 N C (typ). Thermal shutdown
is indicated by 0V on AOUT.
Undervoltage and Overvoltage Lockout
The devices include undervoltage lockout circuitry
input voltage goes below 3.5V (typ) during startup and
brownout conditions. Input voltages of less than 3.5V
inhibit operation of the device by turning off the internal
charge pump and the switch.
These devices also feature an overvoltage lockout
(OVLO) threshold of 21V (typ). When V IN is greater than
V OVLO , the device immediately turns off the switch and
the internal charge pump.
Shutdown ( SHDN )
The devices feature an active-low shutdown input
( SHDN ) to place them into a low-power shutdown mode.
The devices turn off and consume a 7 F A maximum (at
V IN = 12V) of shutdown current when SHDN is driven
low for greater than 360 F s. Driving SHDN high initiates
a device turn-on with short-to-battery detection. Pulsing
SHDN low for less than t SHDN_OFF clears the OL output.
Internal Reference (REF)
The devices feature a 3V bandgap reference output, sta-
ble over supply voltage and temperature. The reference
has a current drive capability of 100 F A. Use resistive
dividers connected to REF to set the open-load current
threshold and the current-limit threshold. Do not use REF
to drive external circuitry.
Internal +5V Linear Regulator (REG)
The devices feature an internal regulator that regulates
the input voltage to +5V to power all internal circuitry.
Bypass the regulator output (REG) to GND with a 1 F F
ceramic capacitor. Do not use this regulator to power
external circuitry.
(UVLO) to prevent erroneous switch operation when the
Table 1. M AX16946/MAX16947 Status Truth Table
SC
1
0
1
OL
1
1
0
V AOUT (V)
(I LOAD O R SENSE ) O 26 + 0.4
(I LOAD O R SENSE ) O 26 + 0.4
(I LOAD O R SENSE ) O 26 + 0.4
DEVICE STATUS
Normal operation
Short circuit
Open load
ACTION TAKEN
None
Autoretry
OL latched low
Reverse current (on-state)
Switch/LDO latched off
0
0
0.4 after switching off
OUT short-to-battery (off-state),
Switch/LDO turned off as long as condition
V OUT too high ( LDO mode)
Thermal shutdown, V IN
persists
Switch/LDO and AOUT turns off as long as
1
1
0
overvoltage, V IN undervoltage
REF undervoltage
condition persists
Switch/LDO, AOUT, and REF turned off as
long as condition persists
Maxim Integrated
15
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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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