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參數(shù)資料
| 型號： | MIC2755 |
| 廠商： | Micrel Semiconductor,Inc. |
| 英文描述： | Battery System Supervisor(電池系統(tǒng)監(jiān)控器（由多路比較器，復(fù)位脈沖發(fā)生器和邏輯門組成）) |
| 中文描述： | 電池系統(tǒng)主管（電池系統(tǒng)監(jiān)控器（由多路比較器，復(fù)位脈沖發(fā)生器和邏輯門組成）） |
| 文件頁數(shù)： | 1/12頁 |
| 文件大?。?/td> | 79K |
| 代理商： | MIC2755 |
February 2000
1
MIC2755
MIC2755
Micrel
MIC2755
Battery System Supervisor
Preliminary Information
General Description
The MIC2755 is composed of multiple comparators, a reset
pulse generator, and logic. It is designed for monitoring the
battery supply of portable digital systems, including PDAs
and pagers.
The MIC2755 detects three different battery states: battery
OK, low battery, and dead battery. The reset (/RST) output is
asserted for at least 700ms when a fresh battery is inserted.
The nonmaskable interrupt output (/NMI) is asserted when
the battery voltage is below the NTH threshold, indicating that
high-power system operations should not occur. If and when
battery voltage falls below the power-off threshold (PTH), the
reset output is asserted and latched, inhibiting system opera-
tion until the battery is replaced or recharged.
All three voltage thresholds are set using external resistors.
A manual reset function can be implemented by connecting
a switch directly to the power on reset/manual reset [RTH(/MR)]
input. Internal circuitry detects switch activation and gener-
ates a minimum 175ms debounced reset signal. The
MIC2755’s power supply input is separate from the detector
inputs to allow it to be powered from a down-stream voltage,
such as the output of a boost converter.
Inputs and outputs can be pulled above V
DD
(up to 7V
absolute maximum) without adverse effects or excessive
current draw.
Supply current is typically a low 2
μ
A. Hysteresis is included
on all voltage detectors to prevent chattering due to noise.
The MIC2755 is available in the tiny 8-lead micro-small-
outline package.
Typical Application
MIC2755
Boost or Buck
Converter
PTH
NTH
RTH(/MR)
VDD
/POF
/NMI
/RST
GND
IN
OUT
EN
V
BAT
656k
344k
576k
26.7k
400k
SW
RESET
100k
100k 100k
μ
Controller or
μ
Processor
/RST
GND
/NMI
SUPPLY
V
BAT(OK)
= 3.6V
V
BAT(low)
= 3.1V
V
BAT(dead)
= 2.9V
Supervised Boost Converter and Microcontroller or Microprocessor
Features
Optimized for PDAs, pagers and
other hand-held devices.
Detects multiple battery states:
- battery OK
- low battery
- dead battery
Adjustable voltage thresholds
High accuracy
±
2% voltage thresholds
Reset generation at power-on (700ms min.)
Debounced manual reset function
Internal logic prevents chatter if battery voltage
fluctuates
Extremely low 2
μ
A typical supply current
I/Os can be pulled above V
DD
(7V absolute maximum)
Immune to brief power supply transients
Low cost
8-lead MSOP
Applications
PDAs
Pagers
Consumer electronics
Embedded controllers
Portable instruments
Data loggers
Ordering Information
Part Number
MIC2755BMM
Junction Temp. Range
–
40
°
C to +85
°
C
Package
8-pin MSOP
Micrel, Inc. 1849 Fortune Drive San Jose, CA 95131 USA tel + 1 (408) 944-0800 fax + 1 (408) 944-0970 http://www.micrel.com
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MIC2755BMM | 功能描述:IC SUPERVISOR BATT SYSTEM 8-MSOP RoHS:否 類別:集成電路 (IC) >> PMIC - 監(jiān)控器 系列:- 標(biāo)準(zhǔn)包裝:1 系列:- 類型:簡單復(fù)位/加電復(fù)位 監(jiān)視電壓數(shù)目:1 輸出:開路漏極或開路集電極 復(fù)位:低有效 復(fù)位超時:標(biāo)準(zhǔn)傳輸延遲為 60 µs 電壓 - 閥值:3V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:SC-74A，SOT-753 供應(yīng)商設(shè)備封裝:SOT-23-5 包裝:Digi-Reel® 其它名稱:LM8364BALMF30DKR |
| MIC2755BMM TR | 功能描述:IC SUPERVISOR BATT SYSTEM 8-MSOP RoHS:否 類別:集成電路 (IC) >> PMIC - 監(jiān)控器 系列:- 標(biāo)準(zhǔn)包裝:1 系列:- 類型:簡單復(fù)位/加電復(fù)位 監(jiān)視電壓數(shù)目:1 輸出:開路漏極或開路集電極 復(fù)位:低有效 復(fù)位超時:標(biāo)準(zhǔn)傳輸延遲為 60 µs 電壓 - 閥值:3V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:SC-74A，SOT-753 供應(yīng)商設(shè)備封裝:SOT-23-5 包裝:Digi-Reel® 其它名稱:LM8364BALMF30DKR |
| MIC2755BMMTS | 制造商:MICREL SEMI 功能描述: |
| MIC2755YMM | 功能描述:監(jiān)控電路 Battery system supervisor; MSOP-08 (Lead Free) 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 |
| MIC2755YMM TR | 功能描述:監(jiān)控電路 Battery system supervisor; MSOP-08 (Lead Free) 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 |
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