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参数资料
| 型号： | MAX6819UT+T |
| 厂商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分类： | 电源管理 |
| 英文描述： | SOT23 Power-Supply Sequencers |
| 中文描述： | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO6 |
| 封装： | MO-178AB, SOT-23, 6 PIN |
| 文件页数： | 1/8页 |
| 文件大小： | 521K |
| 代理商： | MAX6819UT+T |
General Description
The MAX6819/MAX6820 are power-supply sequencers
for dual-voltage microprocessors (Ps) 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
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 RDS-
ON voltage drop. The devices can be connected to
support various supply sequencing priorities such as
VI/O before VCORE or VCORE before VI/O.
The MAX6819 features a logic-driven EN input to
enable/disable the external MOSFET drive and includes
an internally fixed 200ms enable timeout period
(VPRIMARY GOOD to VSECONDARY 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
6-pin SOT23 packages.
Applications
Dual-Voltage Microprocessors
Multivoltage Systems
Digital Signal Processors
Power PC Series Processors
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
MAX6819/MAX6820
SOT23 Power-Supply Sequencers
________________________________________________________________ Maxim Integrated Products
1
19-1951; Rev 3; 12/05
Ordering Information
PART
TEMP RANGE
PIN-
PACKAGE
TOP
MARK
MAX6819UT-T
-40°C to +125°C
6 SOT23-6
AARF
MAX6820UT-T
-40°C to +125°C
6 SOT23-6
AARG
Pin Configurations
GND
EN
SETV
16
VCC2
5
GATE
VCC1
MAX6819
SOT23-6
TOP VIEW
2
34
Products must be ordered in 2,500 piece increments.
Devices are available in both leaded and lead-free packaging.
Specify lead-free by replacing “-T” with “+T” when ordering.
Typical Operating Circuits
EN
SETV
VCC2
GATE
DUAL-SUPPLY
BOARD OR
P
PRIMARY SUPPLY
(3.3V)
SECONDARY SUPPLY
(1.8V)
VCC1
GND
ON
OFF
MAX6819
Pin Configurations and Typical Operating Circuits
continued at end of data sheet.
Power PC is a trademark of IBM corp.
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.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX681CPD | 功能描述:电荷泵 RoHS:否 制造商:Maxim Integrated 功能:Inverting, Step Up 输出电压:- 1.5 V to - 5.5 V, 3 V to 11 V 输出电流:100 mA 电源电流:1 mA 最大工作温度:+ 70 C 封装 / 箱体:SOIC-8 Narrow 封装:Tube |
| MAX681EPD | 功能描述:电荷泵 RoHS:否 制造商:Maxim Integrated 功能:Inverting, Step Up 输出电压:- 1.5 V to - 5.5 V, 3 V to 11 V 输出电流:100 mA 电源电流:1 mA 最大工作温度:+ 70 C 封装 / 箱体:SOIC-8 Narrow 封装:Tube |
| MAX6820UT | 制造商:Maxim Integrated Products 功能描述:SOT23 POWER-SUPPLY SEQUENCER - Rail/Tube |
| MAX6820UT+ | 制造商:Maxim Integrated Products 功能描述:VOLT SUPERVISOR SEQUENCER 6PIN SOT-23 - Bulk |
| MAX6820UT+T | 功能描述:监控电路 Power-Supply Sequencer 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 |
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