参数资料
| 型号： | MAX4772EUT+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 9/10页 |
| 文件大小： | 0K |
| 描述： | IC SWITCH 1X1 SOT23-6 |
| 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： | 360 毫欧 |
| 电流 - 电源： | 125µA |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | SOT-23-6 |
| 供应商设备封装： | SOT-6 |
| 包装： | 带卷 (TR) |
MAX4772/MAX4773
The autoretry feature saves system power in the case of
an overcurrent or short-circuit condition. During tBLANK,
when the switch is on, the supply current is at the cur-
rent limit. During tRETRY, when the switch is off, the cur-
rent through the switch is zero. Instead of observing the
full load current, the switch sees the equivalent load
current times duty cycle or ISUPPLY = ILOAD
tBLANK/(tBLANK + tRETRY). With a typical tBLANK =
37ms and typical tRETRY = 555ms, the duty cycle is
6%, which results in a 94% power savings over the
switch being on the entire time. The duty cycle is con-
sistent across the process and devices.
Latch Off (MAX4772)
When the forward or reverse current-limit threshold is
exceeded, tBLANK timer begins counting. The timer
resets if the overcurrent condition disappears before
tBLANK has elapsed. The switch is shut off and FLAG
asserts if the overcurrent condition continues up to the
end of the blanking time. Reset the switch by either tog-
gling ON (Figure 5) or cycling the input voltage (Figure 5).
Fault Blanking
The MAX4772/MAX4773 feature 14ms (min) fault blank-
ing. Fault blanking allows current-limit faults, including
momentary short-circuit faults that occur when hot
swapping a capacitive load, and also ensures that no
fault is issued during power-up. When a load transient
causes the device to enter current limit, an internal
counter starts. If the load-transient fault persists beyond
the fault-blanking timeout, FLAG asserts low. Load-tran-
sient faults less than tBLANK do not cause a FLAG out-
put assertion. Only current-limit faults are blanked.
A thermal fault causes FLAG to assert immediately and
does not wait for the blanking time.
Thermal Shutdown
The MAX4772/MAX4773 have a thermal-shutdown fea-
ture to protect the devices from overheating. The switch
turns off and FLAG goes low immediately (no fault
blanking) when the junction temperature exceeds
+150°C. The switch with autoretry turns back on when
the device temperature drops approximately 15°C. The
switch with the latch off requires ON cycling.
Applications Information
Input Capacitor
To limit the input-voltage drop during momentary output
short-circuit conditions, connect a capacitor from IN to
GND. A 0.1F ceramic capacitor is adequate for most
applications; however, higher capacitor values further
200mA/500mA Selectable
Current-Limit Switches
8
_______________________________________________________________________________________
Figure 5. MAX4773 Latch-Off Fault Blanking
LOAD
CURRENT
SWITCH
STATUS
ON PIN
VOLTAGE
tBLANK
OFF
ON
(a)
(b)
LOAD
CURRENT
SWITCH
STATUS
IN PIN
VOLTAGE
OFF
ON
tBLANK
FLAG PIN
STATUS
FLAG PIN
STATUS
Figure 4. MAX4773 Autoretry Fault-Blanking Diagram
LOAD
CURRENT
SWITCH
STATUS
FLAG PIN
STATUS
tBLANK
OFF
ON
tRETRY
CURRENT
LIMIT
SHORT
CONDITION
REMOVED
tBLANK
相关PDF资料 |
PDF描述 |
|---|---|
| MAX4783ETE+ | IC SWITCH TRIPLE SPDT 16TQFN |
| MAX4784EGE | IC MULTIPLEXER QUAD 2X1 16QFN |
| MAX4787EXK+TC7Q | IC SWITCH 1X1 SC70-5 |
| MAX4791EUK/V+T | IC SWITCH 1X1 SOT23-5 |
| MAX4798EUK+T | IC ANALOG SWITCH 1X1 SOT23-5 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX4773ETT-T | 功能描述:电源开关 IC - 配电 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 |
| MAX4773EUT | 制造商:Maxim Integrated Products 功能描述:- Cut Tape Product |
| MAX4773EUT+ | 制造商:Maxim Integrated Products 功能描述:CURRENT LIMIT SW 1-IN 1-OUT 2V TO 4.5V 0.8A 6PIN SOT-23 - Cut Tape Product |
| MAX4773EUT+T | 功能描述:电源开关 IC - 配电 200mA/500mA Select 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 |
| MAX4773EUT-T | 功能描述:电源开关 IC - 配电 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 |
发布紧急采购，3分钟左右您将得到回复。