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MAX6427, MAX6428, MAX6429, MAX6430, MAX6431, MAX6432, MAX6433, MAX6434, MAX6435, MAX6436, MAX6437, MAX6438
低功耗、单/双电平电池监测器，带有滞回
低功耗、单/双电平电池监视器，带有内部滞回、无需外部元件。非常适合单节锂电池或多节碱性电池、NiMH或NiCd电池供电系统
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概述
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完整的数据资料
(PDF, 388kB)
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英文  下载
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MAX6427-MAX6438是单/双电平电池监视器，带有内部滞回。这些器件提供单路(MAX6427/MAX6428/MAX6429、MAX6433/MAX6434/MAX6435)或双路(MAX6430/MAX6431/MAX6432、MAX6436/MAX6437/MAX6438)低电池电压输出指示，可以用来指示三种电池状态：电池正常(系统运行在正常模式)、电池不足(系统运行在低功耗模式)或电池耗尽(禁止系统工作)。
这些器件非常适合监视单节锂离子(Li+)电池或多节碱性电池/NiCd/NiMH电池供电系统。当电源电压降低到规定的最低门限时，产生低电池电压报警输出。当电压上升到规定的高压门限值时，低电池电压输出将持续保持140ms的最小延时周期。延时周期确保在电源转换或微处理器激活之前电源电压稳定。
MAX6427-MAX6438系列提供几种监视选择，MAX6427/MAX6428/MAX6429采用工厂预置的电池监视门限，具有一路低电池电压输出；MAX6430/MAX6431/MAX6432同样具有工厂预置的门限，但可提供两路低电池电压输出。MAX6433-MAX6438具有用户可调节的门限电压，允许用户选择滞回范围，提高系统对噪声的免疫力。较宽的滞回范围可避免由于负载移出后电池的恢复而导致的啁啾。MAX6433/MAX6434/MAX6435提供单路低电池电压输出，MAX6436/MAX6437/MAX6438提供双路低电池电压输出。
MAX6427-MAX6438系列可提供三种输出逻辑选择，便于与系统电源或微处理器接口。该系列产品采用SOT23或SOT143封装，工作于全温范围。
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| 关键特性 |
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应用/使用 |
- 工厂预置或用户可调门限选择
- 1.6V至2.1V或2.6V至3.1V、级差100mV的工厂预置低压门限(MAX6427-MAX6432)
- 2.3V至2.6V或3.3V至3.6V、级差100mV的工厂预置低压门限(MAX6427-MAX6432)
- 用户可调低压/高压门限，内置615mV基准(MAX6433-MAX6438)
- 低电流(1µA典型值)
- 单路或双路低电池电压输出
- 推挽式/LBO、漏极开路/LBO和漏极开路LBO选择
- 140ms最小LBO延时周期
- 瞬时电池电压短路保护
- 确保BATT = 1.0V时LBO逻辑状态有效
- -40°C至+85°C工作温度范围
- 微型3引脚、4引脚、5引脚和6引脚SOT封装
- 无需外部元件(MAX6427-MAX6432)
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| Key Specifications: Supervisors (1 Monitored Voltage) |
| Part Number |
Reset Thresh.
(V) |
Reset Out |
Reset Out |
tRESET |
Watchdog Feature |
Supervisor Features |
Reset Thresh. Accur.
(%) |
ICC
(µA) |
Price |
| Active Low |
Active High |
min |
@ +25°C |
max |
See Notes |
| MAX6427 |
| 1.2 to 1.8 | | 1.8 to 2.5 | | 2.5 to 3.3 | | 3.3 to 5.5 |
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Push-Pull |
- |
85ms to 300ms |
No Watchdog |
Power Fail Comparator/Low Battery Detect |
2.5 |
1.5 |
$0.87 @1k |
| MAX6428 |
| 1.2 to 1.8 | | 1.8 to 2.5 | | 2.5 to 3.3 | | 3.3 to 5.5 |
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Open Drain |
- |
$0.87 @1k |
| MAX6429 |
| 1.2 to 1.8 | | 1.8 to 2.5 | | 2.5 to 3.3 | | 3.3 to 5.5 |
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- |
Open Drain |
$0.87 @1k |
| MAX6433 |
| 0 to 1.2 | | 1.2 to 1.8 | | 1.8 to 2.5 | | 2.5 to 3.3 | | 3.3 to 5.5 |
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Push-Pull |
- |
$0.87 @1k |
| MAX6434 |
| 0 to 1.2 | | 1.2 to 1.8 | | 1.8 to 2.5 | | 2.5 to 3.3 | | 3.3 to 5.5 |
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Open Drain |
- |
$0.87 @1k |
| MAX6435 |
| 0 to 1.2 | | 1.2 to 1.8 | | 1.8 to 2.5 | | 2.5 to 3.3 | | 3.3 to 5.5 |
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- |
Open Drain |
$0.87 @1k |
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查看所有Supervisors (1 Monitored Voltage) (274)
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| Key Specifications: Supervisors (2 Monitored Voltages) |
| Part Number |
Interface |
Reset Thresh.
(V) |
Reset Out |
Reset Out |
tRESET |
Watchdog Feature |
Supervisor Features |
Reset Thresh. Accur.
(%) |
ICC
(µA) |
Price |
| Active Low |
Active High |
min |
@ +25°C |
max |
See Notes |
| MAX6430 |
Factory Fixed |
| 1.2 to 1.8 | | 1.8 to 2.5 | | 2.5 to 3.3 | | 3.3 to 5.5 |
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Push-Pull |
- |
85ms to 300ms |
No Watchdog |
Power Fail Comparator/Low Battery Detect |
2.5 |
1.5 |
$1.09 @1k |
| MAX6431 |
Factory Fixed |
| 1.2 to 1.8 | | 1.8 to 2.5 | | 2.5 to 3.3 | | 3.3 to 5.5 |
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Open Drain |
- |
$1.09 @1k |
| MAX6432 |
Factory Fixed |
| 1.2 to 1.8 | | 1.8 to 2.5 | | 2.5 to 3.3 | | 3.3 to 5.5 |
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Open Drain |
$1.09 @1k |
| MAX6436 |
R/C Adjustable |
| 0 to 1.2 | | 1.2 to 1.8 | | 1.8 to 2.5 | | 2.5 to 3.3 | | 3.3 to 5.5 |
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Push-Pull |
- |
$1.09 @1k |
| MAX6437 |
R/C Adjustable |
| 0 to 1.2 | | 1.2 to 1.8 | | 1.8 to 2.5 | | 2.5 to 3.3 | | 3.3 to 5.5 |
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Open Drain |
- |
$1.09 @1k |
| MAX6438 |
R/C Adjustable |
| 0 to 1.2 | | 1.2 to 1.8 | | 1.8 to 2.5 | | 2.5 to 3.3 | | 3.3 to 5.5 |
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Open Drain |
$1.09 @1k |
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查看所有Supervisors (2 Monitored Voltages) (84)
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图表
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典型工作电路
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参考文献： 19-2323;
Rev. 2;
2006-05-09
本页最后一次更新: 2009-08-18
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