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

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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。

关键特性

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)

	电池供电系统(单节Li+或多节NiMH、NiCd、碱性电池)
	蜂窝电话/无绳电话
	电子玩具
	MP3播放器
	寻呼机
	PDA
	便携式医疗设备

Key Specifications: Supervisors (1 Monitored Voltage)

Part Number

Reset Threshold Range (V)

Active-Low Reset Output

Active-High Reset Output

Min. Reset Timeout Range

Watchdog Feature

Supervisor Features

Reset Thresh. Acc. (% @+25°C)

Max. I_CC (µA)

RoHS Available

Package

Operating Temp. Range (°C)

Price^**

MAX6427

1.2 to 1.8
1.8 to 2.5
2.5 to 3.3
3.3 to 5.5

Push-Pull

85ms to 300ms

No Watchdog

Low Battery Detect

2.5

1.5

Yes

SOT-23/3

-40 to +85
0 to +70

$0.87 @ 1k

MAX6428

1.2 to 1.8
1.8 to 2.5
2.5 to 3.3
3.3 to 5.5

Open Drain

SOT-23/3

$0.87 @ 1k

MAX6429

1.2 to 1.8
1.8 to 2.5
2.5 to 3.3
3.3 to 5.5

Open Drain

SOT-23/3

$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

Push-Pull

SOT-23/5

$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

Open Drain

SOT-23/5

$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

Open Drain

SOT-23/5

$0.87 @ 1k

See All Supervisors (1 Monitored Voltage) (268)

Key Specifications: Supervisors (2 Monitored Voltages)

Part Number

Interface

Reset Threshold Range (V)

Active-Low Reset Output

Active-High Reset Output

Min. Reset Timeout Range

Watchdog Feature

Supervisor Features

Reset Thresh. Acc. (% @+25°C)

Max. I_CC (µA)

RoHS Available

Package

Operating Temp. Range (°C)

Price^**

MAX6430

Factory Fixed

1.2 to 1.8
1.8 to 2.5
2.5 to 3.3
3.3 to 5.5

Push-Pull

85ms to 300ms

No Watchdog

Low Battery Detect

2.5

1.5

Yes

SOT-143/4

-40 to +85
0 to +70

$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

Open Drain

Yes

SOT-143/4

$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

Open Drain

Yes

SOT-143/4

$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

Push-Pull

Yes

SOT-23/6

$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

Open Drain

Yes

SOT-23/6

$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

Open Drain

SOT-23/6

$1.09 @ 1k

See All Supervisors (2 Monitored Voltages) (70)

Notes:
^**This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific prices and delivery, please see the price and availability page or contact an authorized distributor.