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參數(shù)資料
| 型號： | MAX6457UKD3C+T |
| 廠商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分類： | 電源管理 |
| 英文描述： | High-Voltage, Low-Current Voltage Monitors in SOT Packages |
| 中文描述： | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO5 |
| 封裝： | ROHS COMPLIANT, MO-178AA, SOT-23, 5 PIN |
| 文件頁數(shù)： | 14/15頁 |
| 文件大?。?/td> | 168K |
| 代理商： | MAX6457UKD3C+T |
MAX6457–MAX6460
Detailed Description
Each of the MAX6457–MAX6460 high-voltage (4V to
28V), low-power voltage monitors include a precision
bandgap reference, one or two low-offset-voltage com-
parators, internal threshold hysteresis, internal timeout
period, and one or two high-voltage open-drain outputs.
Programming the Trip Voltage (VTRIP)
Two external resistors set the trip voltage, VTRIP (Figure 5).
VTRIP is the point at which the applied voltage (typically
VCC) toggles OUT. The MAX6457/MAX6458/MAX6459/
MAX6460’s high input impedance allows large-value
resistors without compromising trip-voltage accuracy.
To minimize current consumption, select a value for R2
between 10k
and 1M, then calculate R1 as follows:
where VTRIP = desired trip voltage (in volts), VTH =
threshold trip voltage (VTH+ for overvoltage detection
or VTH- for undervoltage detection).
Use the MAX6460 voltage reference (REF) to set the
trip threshold by connecting IN+ or IN- through a volt-
age divider (within the inputs common-mode voltage
range) to REF. Do not connect REF directly to IN+ or
IN- since this violates the input common-mode voltage
range. Small leakage currents into the comparators
inputs allows use of large value resistors to prevent
loading the reference and affecting its accuracy. Figure
5b shows an active-high power-good output. Use the
following equation to determine the resistor values
when connecting REF to IN-:
where VREF = reference output voltage (2.25V, typ),
VREFD = divided reference, VTRIP = desired trip thresh-
old in (in volts).
For an active-low power-good output, connect the
resistor divider R1 and R2 to the inverting input and the
reference-divider network to the noninverting input.
Alternatively, connect an external reference less than
1.4V to either input.
RR
V
TRIP
REFD
12
1
=
VV
R
RR
REFD
REF
=
+
4
34
RR
V
TRIP
TH
12
1
=
-
High-Voltage, Low-Current Voltage Monitors in
SOT Packages
8
_______________________________________________________________________________________
VCC
IN+
GND
OUT
(OUTA FOR
MAX6459)
R1
VCC
R2
RPULLUP
OUT
(OUTA)
MAX6457–
MAX6460
VTRIP = VTH
R1 + R2
R2
Figure 5a. Programming the Trip Voltage
VCC
IN+
REF
IN-
GND
R1
VTRIP
VREFD
R2
R3
R4
RPULLUP
OUT
MAX6460
Figure 5b. Programming the MAX6460 Trip Voltage
VTH+
VTH-
VIN+
VOUT
0
VCC
VHYST
tTP
Figure 6. Input and Output Waveforms (Noninverting Input Varied)
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MAX6458UKD0A+T | High-Voltage, Low-Current Voltage Monitors in SOT Packages |
| MAX6458UKD0B+T | High-Voltage, Low-Current Voltage Monitors in SOT Packages |
| MAX6458UKD0C+T | High-Voltage, Low-Current Voltage Monitors in SOT Packages |
| MAX6458UKD3A+T | High-Voltage, Low-Current Voltage Monitors in SOT Packages |
| MAX6458UKD3B+T | High-Voltage, Low-Current Voltage Monitors in SOT Packages |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX6458UKD0A | 制造商:Maxim Integrated Products 功能描述:HIGH-VOLTAGE LOW-CURRENT VOLTAGE M - Cut Tape Product |
| MAX6458UKD0A+ | 制造商:Maxim Integrated Products 功能描述:VOLT SUPERVISOR MONITOR 5PIN SOT-23 - Rail/Tube |
| MAX6458UKD0A+T | 功能描述:監(jiān)控電路 Single Low C/V Voltage Monitor RoHS:否 制造商:STMicroelectronics 監(jiān)測電壓數(shù): 監(jiān)測電壓: 欠電壓閾值: 過電壓閾值: 輸出類型:Active Low, Open Drain 人工復(fù)位:Resettable 監(jiān)視器:No Watchdog 電池備用開關(guān):No Backup 上電復(fù)位延遲（典型值）:10 s 電源電壓-最大:5.5 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:UDFN-6 封裝:Reel |
| MAX6458UKD0A-T | 功能描述:監(jiān)控電路 RoHS:否 制造商:STMicroelectronics 監(jiān)測電壓數(shù): 監(jiān)測電壓: 欠電壓閾值: 過電壓閾值: 輸出類型:Active Low, Open Drain 人工復(fù)位:Resettable 監(jiān)視器:No Watchdog 電池備用開關(guān):No Backup 上電復(fù)位延遲（典型值）:10 s 電源電壓-最大:5.5 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:UDFN-6 封裝:Reel |
| MAX6458UKD0B | 功能描述:監(jiān)控電路 MAX6458UKD0B RoHS:否 制造商:Maxim Integrated 監(jiān)測電壓數(shù):1 監(jiān)測電壓:4 V to 28 V 欠電壓閾值:1.111 V 過電壓閾值:1.194 V 輸出類型: 人工復(fù)位:Not Resettable 監(jiān)視器:No Watchdog 電池備用開關(guān): 上電復(fù)位延遲（典型值）: 電源電壓-最大:28 V 最大工作溫度:+ 125 C 安裝風(fēng)格: 封裝 / 箱體:SOT-23 封裝: |
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