Datasheet > IMP690A

IMP690A

更新时间： 2024-01-28 03:12:06

品牌	Logo	应用领域
IMP		电池微处理器监控
页数	文件大小	规格书
10页	227K
描述
レP POWER SUPPLY SUPERVISOR WITH BATTERY BACKUP SWITCH

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技术参数
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IMP690A 技术参数

生命周期：	Obsolete	包装说明：	DIP, DIP8,.3
Reach Compliance Code：	unknown	ECCN代码：	EAR99
HTS代码：	8542.39.00.01	风险等级：	5.84
Is Samacsys：	N	模拟集成电路 - 其他类型：	POWER SUPPLY SUPPORT CIRCUIT
JESD-30 代码：	R-CDIP-T8	端子数量：	8
封装主体材料：	CERAMIC, METAL-SEALED COFIRED	封装代码：	DIP
封装等效代码：	DIP8,.3	封装形状：	RECTANGULAR
封装形式：	IN-LINE	电源：	1.1/5.5 V
认证状态：	Not Qualified	子类别：	Power Management Circuits
最大供电电流 (Isup)：	0.1 mA	表面贴装：	NO
技术：	CMOS	端子形式：	THROUGH-HOLE
端子节距：	2.54 mm	端子位置：	DUAL
Base Number Matches：	1

IMP690A 数据手册

IMP690A, 692A, 802L/M, 805L

OWER

ANAGEMENT

Key Features

µP Power Supply Supervisor

with Battery Backup Switch

◆

Design improvement over Maxim

MAX690A/692A/802L/802M/805L

— 70% lower current than Maxim:

100µA maximum

The IMP690A/IMP692A/IMP802L/IMP802M/IMP805L simplify power

supply monitoring and control in microprocessor systems. Each circuit

implements four functions: Reset control, watchdog monitoring, battery-

backup switching and power-failure monitoring. In addition to

microprocessor reset under powerup and power-down conditions, these

devices provide battery-backup switching to maintain control in power-

loss and brown-out situations. Additional monitoring capabilities

can provide an early warning of unregulated power-supply loss before

the voltage regulator drops out. The important features of these four

functions are:

— RESET Operation to 1.1V

Two precision supply-voltage monitor options

— 4.65V (IMP690A/802L/805L)

— 4.40V (IMP692A/802M)

Battery-backup power switch on-chip

Watchdog timer: 1.6 second timeout

Power failure/low battery detection

Short-circuit protection and thermal limiting

Small 8-pin SO package

◆

a) 1.6 second watchdog timer to keep microprocessor responsive

b) 4.40V or 4.65V V_CCthreshold for microprocessor reset at power-up

and power-down

No external components

Specified over full temperature range

c) SPDT (single-pole, double-throw) PMOS switch connects backup

power to RAM if V_CCfails

d) 1.25V threshold detector for power loss or general purpose voltage

monitoring

Applications

While these features are pin–compatible with the industry standard

power–supply supervisors offered by Maxim, the IMP devices are supe-

rior replacements and can reduce power requirements by 70 percent

when compared to Maxim MAX690/MAX692A/MAX802L/MAX802M/

MAX805L devices. Short-circuit and thermal protection have also

been added.

◆ Embedded control systems

◆ Battery–operated systems

◆ Intelligent instruments

The IMP690A/IMP802L/IMP805L generate a reset pulse when the

supply voltage drops below 4.65V, and the IMP692A/IMP802M

generate a reset below 4.40V. The IMP802L/IMP802M have power–fail

accuracy to ±2%. The IMP805L is the same as the IMP690A except that

RESET is provided instead of RESET.

◆ Wireless communication systems

◆ PDAs and handheld equipment

◆ µP/µC power supply monitoring

Block Diagrams

Typical Application

Battery-Switchover

Circuit

V_BATT

V_CC

Unregulated DC

Regulated +5V

V_OUT

Reset

Generator

RESET

(RESET)

V_CC

RESET

NMI

V_CC

0.1µF

R₁

RESET

PFO

PFI

Watchdog

Timer

1.25V

I/O LINE

GND

V_BATTWDI

V_OUT

GND

R₂

3.5V

–

3.6V

Lithium

Battery

WDI

PFI

IMP690A

1.25V

CMOS

RAM

0.8V

V_CC

PFO

GND

IMP690A, IMP692A, IMP802L, IMP802M,

IMP805L

690A_01.eps

690A_03.eps

( ) IMP805L

GND

IMP, Inc.

San Jose, CA

408-432-9100/www.impweb.com

12 3 4 5 6 7...10

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