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參數(shù)資料
| 型號(hào)： | MAX4789EUS |
| 廠商： | Maxim Integrated Products, Inc. |
| 英文描述： | 200mA/250mA/300mA Current-Limit Switches |
| 中文描述： | 200mA/250mA/300mA限流開關(guān) |
| 文件頁數(shù)： | 8/12頁 |
| 文件大?。?/td> | 334K |
| 代理商： | MAX4789EUS |
M
Applications Information
Input Capacitor
To limit the input voltage drop during momentary output
short-circuit conditions, connect a capacitor from IN to
GND. A 0.1μF ceramic capacitor is adequate for most
applications; however, higher capacitor values further
reduce the voltage drop at the input and are recom-
mended for lower voltage applications.
Output Capacitance
Connect a 0.1μF capacitor from OUT to GND. This
capacitor helps prevent inductive parasitics from
pulling OUT negative during turn-off, thus preventing
the MAX4789–MAX4794 from tripping erroneously. If
the load capacitance is too large, then current may not
have enough time to charge the capacitance and the
device assumes that there is a faulty load condition.
The maximum capacitive load value that can be driven
from OUT is obtained by the following formula:
Layout and Thermal Dissipation
To optimize the switch response time to output short-
circuit conditions, it is very important to keep all traces
as short as possible to reduce the effect of undesirable
parasitic inductance. Place input and output capacitors
as close as possible to the device (no more than 5mm).
IN and OUT pins must be connected with short traces
to the power bus.
During normal operation, the power dissipation is small
and the package temperature change is minimal. If the
output is continuously shorted to ground at the maxi-
mum supply voltage, the operation of the switches with
the autoretry option does not cause problems because
the total power dissipated during the short is scaled by
the duty cycle:
where V
IN
= 5.5V, I
OUT
= 450mA, t
BLANK
= 14ms, and
t
RETRY
= 98ms.
Attention must be given to the MAX4789, MAX4791,
and MAX4793 where the latch-off condition must be
manually reset by toggling ON from high to low. If the
latch-off time duration is not sufficiently high, it is possi-
ble for the device to reach the thermal-shutdown
threshold and never be able to turn the device on until
it cools down.
Chip Information
TRANSISTOR COUNT: 1408
PROCESS: BiCMOS
P
V
I
t
t
t
mW
MAX
IN MAX
_
OUT MAX
+
BLANK
RETRY
BLANK
=
×
×
=
_
302
C
I
t
V
MAX
FWD MIN
_
BLANK MIN
IN
<
×
_
200mA/250mA/300mA Current-Limit Switches
8
_______________________________________________________________________________________
LOAD
CURRENT
SWITCH
STATUS
ON PIN
VOLTAGE
t
BLANK
t
BLANK
OFF
ON
(a)
(b)
UVLO
LOAD
CURRENT
SWITCH
STATUS
IN PIN
VOLTAGE
OFF
ON
t
BLANK
t
BLANK
FLAG PIN
STATUS
FLAG PIN
STATUS
Figure 3. MAX4789/MAX4791/MAX4793 Latch-Off Fault
Blanking
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MAX4793EUK | 200mA/250mA/300mA Current-Limit Switches |
| MAX4793EUS | 200mA/250mA/300mA Current-Limit Switches |
| MAX4794EUS | 200mA/250mA/300mA Current-Limit Switches |
| MAX478 | Dual, Single-Supply,Precision Op Amps(單電源，輸入失調(diào)電壓70~250μV,等效輸入噪聲電壓49nV/√Hz,增益帶寬積60KHz的運(yùn)算放大器) |
| MAX4795ETT | DAC8311 Evaluation Module |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX4789EUS-T | 功能描述:電源開關(guān) IC - 配電 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(shí)間（最大值）:400 us 關(guān)閉時(shí)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(fēng)格:SMD/SMT 封裝 / 箱體:SOT-23-5 |
| MAX478ACPA | 功能描述:運(yùn)算放大器 - 運(yùn)放 RoHS:否 制造商:STMicroelectronics 通道數(shù)量:4 共模抑制比（最小值）:63 dB 輸入補(bǔ)償電壓:1 mV 輸入偏流（最大值）:10 pA 工作電源電壓:2.7 V to 5.5 V 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-16 轉(zhuǎn)換速度:0.89 V/us 關(guān)閉:No 輸出電流:55 mA 最大工作溫度:+ 125 C 封裝:Reel |
| MAX478ACPA+ | 功能描述:運(yùn)算放大器 - 運(yùn)放 RoHS:否 制造商:STMicroelectronics 通道數(shù)量:4 共模抑制比（最小值）:63 dB 輸入補(bǔ)償電壓:1 mV 輸入偏流（最大值）:10 pA 工作電源電壓:2.7 V to 5.5 V 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-16 轉(zhuǎn)換速度:0.89 V/us 關(guān)閉:No 輸出電流:55 mA 最大工作溫度:+ 125 C 封裝:Reel |
| MAX478C/D | 功能描述:運(yùn)算放大器 - 運(yùn)放 RoHS:否 制造商:STMicroelectronics 通道數(shù)量:4 共模抑制比（最小值）:63 dB 輸入補(bǔ)償電壓:1 mV 輸入偏流（最大值）:10 pA 工作電源電壓:2.7 V to 5.5 V 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-16 轉(zhuǎn)換速度:0.89 V/us 關(guān)閉:No 輸出電流:55 mA 最大工作溫度:+ 125 C 封裝:Reel |
| MAX478C/D DIE | 制造商:Maxim Integrated Products 功能描述: |
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