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| 型号： | MAX6820UT+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 1/8页 |
| 文件大小： | 0K |
| 描述： | IC SEQUENCER POWER SOT23-6 |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 1 |
| 类型： | 序列发生器 |
| 监视电压数目： | 2 |
| 复位超时： | 最小为 140 ms |
| 电压 - 阀值： | 可调节/可选择 |
| 工作温度： | -40°C ~ 125°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： | 标准包装 |
| 产品目录页面： | 1423 (CN2011-ZH PDF) |
| 其它名称： | MAX6820UT+TDKR |
19-1951; Rev 3; 12/05
SOT23 Power-Supply Sequencers
General Description
The MAX6819/MAX6820 are power-supply sequencers
for dual-voltage microprocessors (μPs) and multivoltage
systems. These devices monitor a primary supply voltage
and enable/disable an external n-channel MOSFET
switch for a secondary supply voltage. The MAX6819/
MAX6820 control local component voltage sequencing
when system power-on/power-off characteristics cannot
be guaranteed (supplies come from a multivoltage sys-
tem bus, silver box, or must be sequenced in different
modes for components on the same board). These small
power-supply sequencers improve system reliability.
The MAX6819/MAX6820 include an internal voltage ref-
erence/comparator with externally adjustable thresh-
olds to monitor the primary power supply. When the
primary supply is below the desired threshold, an exter-
nal secondary supply MOSFET switch is disabled.
When the primary supply exceeds the threshold, an
Features
? Adjustable Primary Supply Voltage Monitor
(Monitors Down to 0.62V)
? Internal Charge Pump to Enhance External
Secondary Supply n-Channel MOSFET Switch
? Delay from Primary Supply Good to Secondary
Supply Enabled
Factory Fixed 200ms (MAX6819)
Capacitor Adjustable (MAX6820)
? Logic Driven ENABLE Input (MAX6819)
? Immune to Short Voltage Transients
? Few External Components
? -40°C to +125°C Operating Temperature Range
? Small 6-Pin SOT23 Package
Ordering Information
internal charge pump is activated and the external
MOSFET switch is enabled to connect the secondary
supply to the load. The charge pump fully enhances the
n-channel MOSFET switch to provide a very low R DS-
PART
MAX6819 UT-T
TEMP RANGE
-40°C to +125°C
PIN-
PACKAGE
6 SOT23-6
TOP
MARK
AARF
ON voltage drop. The devices can be connected to
support various supply sequencing priorities such as
V I/O before V CORE or V CORE before V I/O .
MAX6820 UT-T -40°C to +125°C 6 SOT23-6
Products must be ordered in 2,500 piece increments.
AARG
The MAX6819 features a logic-driven EN input to
enable/disable the external MOSFET drive and includes
an internally fixed 200ms enable timeout period
(V PRIMARY GOOD to V SECONDARY ENABLE ). The
MAX6820 allows the enable timeout period to be
adjusted with a single external capacitor. Both devices
are specified over the automotive temperature range
(-40°C to +125°C) and are available in space-saving
Devices are available in both leaded and lead-free packaging.
Specify lead-free by replacing “-T” with “+T” when ordering.
Typical Operating Circuits
PRIMARY SUPPLY
(3.3V)
SECONDARY SUPPLY
(1.8V)
6-pin SOT23 packages.
V CC2
GATE
DUAL-SUPPLY
Applications
Dual-Voltage Microprocessors
MAX6819
V CC1 GND
BOARD OR μ P
Multivoltage Systems
SETV
EN
ON
OFF
Digital Signal Processors
Power PC? Series Processors
Pin Configurations
TOP VIEW
Pin Configurations and Typical Operating Circuits
V CC1 1
6
V CC2
continued at end of data sheet.
GND 2
MAX6819
5
GATE
Power PC is a trademark of IBM corp.
SETV 3
4
EN
SOT23-6
________________________________________________________________ Maxim Integrated Products
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.
1
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX6821LUK | 制造商:Maxim Integrated Products 功能描述:LOW_VOLTAGE SOT23 MICROPROCESSOR SU - Rail/Tube |
| MAX6821LUK+ | 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述: |
| MAX6821LUK+T | 功能描述:监控电路 RoHS:否 制造商:STMicroelectronics 监测电压数: 监测电压: 欠电压阈值: 过电压阈值: 输出类型:Active Low, Open Drain 人工复位:Resettable 监视器:No Watchdog 电池备用开关:No Backup 上电复位延迟（典型值）:10 s 电源电压-最大:5.5 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:UDFN-6 封装:Reel |
| MAX6821LUK-T | 功能描述:监控电路 RoHS:否 制造商:STMicroelectronics 监测电压数: 监测电压: 欠电压阈值: 过电压阈值: 输出类型:Active Low, Open Drain 人工复位:Resettable 监视器:No Watchdog 电池备用开关:No Backup 上电复位延迟（典型值）:10 s 电源电压-最大:5.5 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:UDFN-6 封装:Reel |
| MAX6821MUK | 制造商:Maxim Integrated Products 功能描述:LOW_VOLTAGE SOT23 MICROPROCESSOR SU - Cut Tape Product |
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