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參數(shù)資料
| 型號： | MAX4914AEUK+T |
| 廠商： | Maxim Integrated Products |
| 文件頁數(shù)： | 9/11頁 |
| 文件大小： | 0K |
| 描述： | IC SWITCH 1X1 SOT23-5 |
| 產(chǎn)品培訓(xùn)模塊： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 標準包裝： | 2,500 |
| 功能： | 開關(guān) |
| 電路： | 1 x 1:1 |
| 導(dǎo)通狀態(tài)電阻： | 400 毫歐 |
| 電壓電源： | 單電源 |
| 電壓 - 電源，單路/雙路(±)： | 2.3 V ~ 5.5 V |
| 電流 - 電源： | 80µA |
| 工作溫度： | -40°C ~ 85°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | SC-74A，SOT-753 |
| 供應(yīng)商設(shè)備封裝： | SOT-23-5 |
| 包裝： | 帶卷 (TR) |
drain output transistor and requires an external pullup
resistor from
FLAG to IN. During shutdown (VON < VIL),
the pulldown on the
FLAG output is released in order to
limit power dissipation.
FLAG goes low when any of the
following conditions occur:
The die temperature exceeds the thermal-shutdown
temperature limit of +150°C.
The device is in current limit for more than the fault-
blanking period.
VIN is below the UVLO threshold.
For the MAX4915A/MAX4917A (autoretry versions),
FLAG stays low until the overcurrent condition is
removed (See Figure 2).
Autoretry (MAX4915A/MAX4917A)
When the forward or reverse current-limit threshold is
exceeded, tBLANK timer begins counting (Figure 2).
The timer resets if the overcurrent condition disappears
before tBLANK has elapsed. A retry time delay, tRETRY,
is started immediately after tBLANK has elapsed, and
during that time, the switch is latched off. At the end of
tRETRY, the switch is turned on again. If the fault still
exists, the cycle is repeated. If the fault has been
removed, the switch stays on.
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 current limit. During tRETRY, when the switch is off,
the current 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
consistent across the process and devices.
MAX4914B/MAX4915A/B/MAX4917A/B
100mA/200mA/300mA Current-Limit Switches
with Low Shutdown Reverse Current
_______________________________________________________________________________________
7
ON
FAULT
SWITCH ON/OFF
SUPPLY CURRENT MODE
Low
X
OFF
Shutdown
High
Undervoltage lockout
OFF
Shutdown
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
MAX4915A/MAX4917A (autoretry versions); cycle repeats
until fault is removed
See the Autoretry
(MAX4915A/MAX4917A)
section
Table 1. MAX4914B/MAX4915A/B/MAX4917A/B Switch Truth Table
SWITCH
STATUS
tBLANK
OFF
ON
tRETRY
CURRENT
LIMIT
SHORT
CONDITION
REMOVED
tBLANK
FLAG
STATUS
Figure 2. MAX4915A/MAX4917A Autoretry Fault-Blanking Diagram
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|---|---|
| MAX4914BELT+ | 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述: |
| MAX4914BELT+T | 功能描述:電源開關(guān) IC - 配電 Current-Limit Switch RoHS:否 制造商:Exar 輸出端數(shù)量:1 開啟電阻（最大值）:85 mOhms 開啟時間（最大值）:400 us 關(guān)閉時間（最大值）:20 us 工作電源電壓:3.2 V to 6.5 V 電源電流（最大值）: 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:SOT-23-5 |
| MAX4915AELT+ | 制造商:Maxim Integrated Products 功能描述:CURRENT LIMIT SW 1-IN 1-OUT 2.3V TO 5.5V 0.2A 6PIN UDFN - Rail/Tube |
| MAX4915AELT+T | 功能描述:電源開關(guān) IC - 配電 Current-Limit Switch RoHS:否 制造商:Exar 輸出端數(shù)量:1 開啟電阻（最大值）:85 mOhms 開啟時間（最大值）:400 us 關(guān)閉時間（最大值）:20 us 工作電源電壓:3.2 V to 6.5 V 電源電流（最大值）: 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:SOT-23-5 |
| MAX4915AETT+T | 功能描述:電源開關(guān) IC - 配電 Current-Limit Switch RoHS:否 制造商:Exar 輸出端數(shù)量:1 開啟電阻（最大值）:85 mOhms 開啟時間（最大值）:400 us 關(guān)閉時間（最大值）:20 us 工作電源電壓:3.2 V to 6.5 V 電源電流（最大值）: 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:SOT-23-5 |
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