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參數(shù)資料
| 型號(hào)： | MAX6495ATT+ |
| 廠商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分類： | 電源管理 |
| 英文描述： | 72V, Overvoltage-Protection Switches/Limiter Controllers with an External MOSFET |
| 中文描述： | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO6 |
| 封裝： | 3 X 3 MM, 0.80 MM HEIGHT, LEAD FREE, M0-229WEEA, TDFN-6 |
| 文件頁數(shù)： | 1/16頁 |
| 文件大?。?/td> | 229K |
| 代理商： | MAX6495ATT+ |
General Description
The MAX6495–MAX6499 is a family of small, low-cur-
rent, overvoltage-protection circuits for high-voltage
transient systems such as those found in automotive
and industrial applications. These devices monitor the
input voltage and control an external n-channel MOSFET
switch to isolate the load at the output during an input
overvoltage condition. The MAX6495–MAX6499 operate
over a wide supply voltage range from +5.5V to +72V.
The gate of the n-channel MOSFET is driven high while
the monitored input is below the user-adjustable over-
voltage threshold. An integrated charge-pump circuit
provides a 10V gate-to-source voltage to fully enhance
the n-channel MOSFET. When the input voltage
exceeds the user-adjusted overvoltage threshold, the
gate of the MOSFET is quickly pulled low, disconnect-
ing the load from the input. In some applications, dis-
connecting the output from the load is not desirable. In
these cases, the protection circuit can be configured to
act as a voltage limiter where the GATE output saw-
tooths to limit the voltage to the load (MAX6495/
MAX6496/MAX6499).
The MAX6496 supports lower input voltages and
reduces power loss by replacing the external reverse
battery diode with an external series p-channel MOSFET.
The MAX6496 generates the proper bias voltage to
ensure that the p-channel MOSFET is on during normal
operations. The gate-to-source voltage is clamped dur-
ing load-dump conditions, and the p-channel MOSFET
is off during reverse-battery conditions.
The MAX6497/MAX6498 feature an open-drain, undedi-
cated comparator that notifies the system if the output
falls below the programmed threshold. The MAX6497
keeps the MOSFET switch latched off until either the
input power or the SHDN pin is cycled. The MAX6498
will autoretry when VOVSET falls below 130mV.
These devices are available in small, thermally
enhanced, 6-pin and 8-pin TDFN packages and are
fully specified from -40°C to +125°C.
Applications
Automotive
Industrial
Telecom/Servers/Networking
FireWire
Notebook Computers
Features
Wide Supply Voltage Range: +5.5V to +72V
Overvoltage-Protection Switch Controller Allows
User to Size External n-Channel MOSFETs
Fast Gate Shutoff During Overvoltage with 100mA
Sink Capability
Internal Charge-Pump Circuit Ensures 10V
Gate-to-Source Enhancement for Low RDS(ON)
Performance
n-Channel MOSFET Latches Off After an
Overvoltage Condition (MAX6497/MAX6499)
Adjustable Overvoltage Threshold
Thermal Shutdown Protection
Supports Series p-Channel MOSFET for Reverse-
Battery Voltage Protection (MAX6496)
POK Indicator (MAX6497/MAX6498)
Adjustable Undervoltage Threshold (MAX6499)
-40°C to +125°C Operating Temperature Range
Small, 3mm x 3mm TDFN Package
MAX6495–MAX6499
72V, Overvoltage-Protection Switches/
Limiter Controllers with an External MOSFET
________________________________________________________________ Maxim Integrated Products
1
12
3
65
4
IN
SHDN
OVSET
OUTFB
GATE
GND
MAX6495
3mm x 3mm TDFN
TOP VIEW
Pin Configurations
Ordering Information
19-3778; Rev 2; 1/07
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
Ordering Information continued at end of data sheet.
Note: All devices are specified over the -40°C to +125°C operating
temperature range.
+Denotes lead-free package.
*EP = Exposed pad.
EVALUATION
KIT
AVAILABLE
FireWire is a registered trademark of Apple Computer, Inc.
PART
PIN-
PACKAGE
TOP
MARK
PKG
CODE
MAX6495ATT+T
6 TDFN-EP*
AJM
T633-2
MAX6496ATA+T
8 TDFN-EP*
AOF
T833-2
Pin Configurations continued at end of data sheet.
Selector Guide appears at end of data sheet.
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| MAX6501UKP045+T | Low-Cost, +2.7V to +5.5V, Micropower Temperature Switches in SOT23 and TO-220 |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX6495ATT/V+ | 制造商:Maxim Integrated Products 功能描述:72V OVERVOLTAGE-PROTECTION SWITCHES/LIMITER CONTROLLERS WITH - Rail/Tube |
| MAX6495ATT/V+T | 功能描述:電壓監(jiān)測器/監(jiān)控器 72V Over V Protect Switch/Limiter RoHS:否 制造商:Texas Instruments 監(jiān)測電壓數(shù):2 監(jiān)測電壓:Adjustable 輸出類型:Open Drain 欠電壓閾值: 過電壓閾值: 準(zhǔn)確性:1 % 工作電源電壓:1.5 V to 6.5 V 工作電源電流:1.8 uA 最大工作溫度:+ 125 C 封裝 / 箱體:SON-6 安裝風(fēng)格:SMD/SMT |
| MAX6495ATT+ | 制造商:Maxim Integrated Products 功能描述:OVERVOLT PROT CNTRLR 6TDFN EP - Rail/Tube |
| MAX6495ATT+T | 功能描述:電壓監(jiān)測器/監(jiān)控器 72V Over V Protect Switch/Limiter RoHS:否 制造商:Texas Instruments 監(jiān)測電壓數(shù):2 監(jiān)測電壓:Adjustable 輸出類型:Open Drain 欠電壓閾值: 過電壓閾值: 準(zhǔn)確性:1 % 工作電源電壓:1.5 V to 6.5 V 工作電源電流:1.8 uA 最大工作溫度:+ 125 C 封裝 / 箱體:SON-6 安裝風(fēng)格:SMD/SMT |
| MAX6495EVKIT | 功能描述:電源管理IC開發(fā)工具 MAX6495 Eval Kit RoHS:否 制造商:Maxim Integrated 產(chǎn)品:Evaluation Kits 類型:Battery Management 工具用于評(píng)估:MAX17710GB 輸入電壓: 輸出電壓:1.8 V |
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