参数资料
型号: LM3705XDBPX-232/NOPB
厂商: NATIONAL SEMICONDUCTOR CORP
元件分类: 电源管理
英文描述: 2-CHANNEL POWER SUPPLY SUPPORT CKT, PBGA9
封装: MICRO SMD, BUMP PACKAGE, 9 PIN
文件页数: 1/18页
文件大小: 318K
代理商: LM3705XDBPX-232/NOPB
LM3704/LM3705
Microprocessor Supervisory Circuits with Power Fail
Input, Low Line Output and Manual Reset
General Description
The LM3704/LM3705 series of microprocessor supervisory
circuits provide the maximum flexibility for monitoring power
supplies and battery controlled functions in systems without
backup batteries. The LM3704/LM3705 series are available
in MSOP-10 and 9-bump micro SMD packages.
Built-in features include the following:
Reset: Reset is asserted during power-up, power-down, and
brownout conditions. RESET is guaranteed down to V
CC of
1.0V.
Manual Reset Input: An input that asserts reset when pulled
low.
Power-Fail Input: A 1.225V threshold detector for power fail
warning, or to monitor a power supply other than V
CC.
Low Line Output: This early power failure warning indicator
goes low when the supply voltage drops to a value which is
2% higher than the reset threshold voltage.
Features
n
Standard Reset Threshold voltage: 3.08V
n
Custom Reset Threshold voltages: For other voltages
between 2.2V and 5.0V in 10mV increments, contact
National Semiconductor Corp.
n
No external components required
n
Manual-Reset input
n
RESET (LM3704) or RESET (LM3705) outputs
n
Precision supply voltage monitor
n
Factory programmable Reset Timeout Delay
n
Separate Power Fail comparator
n
Available in micro SMD package for minimum footprint
n ±
0.5% Reset threshold accuracy at room temperature
n ±
2% Reset threshold accuracy over temperature
extremes
n
Reset assertion down to 1V V
CC (RESET option only)
n
28 A V
CC supply current
Applications
n
Embedded Controllers and Processors
n
Intelligent Instruments
n
Automotive Systems
n
Critical P Power Monitoring
Typical Application
10136903
September 2003
LM3704/LM3705
Microprocessor
Supervisory
Circuits
with
Power
Fail
Input,
Low
Line
Output
and
Manual
Reset
2003 National Semiconductor Corporation
DS101369
www.national.com
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