MAX6440UTBGRD3+T datasheet, PDF

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MAX6440UTBGRD3+T: Descriptionbattery management single battery monitor; CategoryPower/power management The power supply circuit; File Size245KB，14 Pages; ManufacturerMaxim; Websitehttps://www.maximintegrated.com/en.html; Environmental Compliance

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MAX6440UTBGRD3+T Overview

battery management single battery monitor

MAX6440UTBGRD3+T Parametric

Parameter Name	Attribute value
Is it lead-free?	Lead free
Is it Rohs certified?	conform to
Maker	Maxim
Parts packaging code	SOT-23
package instruction	LSSOP, TSOP6,.11,37
Contacts	6
Reach Compliance Code	compli
ECCN code	EAR99
Other features	2.625 RESET THESHOLD VOLTAGE; BATTERY HTH AND LTH ARE 3.3V AND 2.7V
Adjustable threshold	NO
Analog Integrated Circuits - Other Types	POWER SUPPLY SUPPORT CIRCUIT
JESD-30 code	R-PDSO-G6
length	2.9 mm
Number of channels	2
Number of functions	1
Number of terminals	6
Maximum operating temperature	85 °C
Minimum operating temperature	-40 °C
Package body material	PLASTIC/EPOXY
encapsulated code	LSSOP
Encapsulate equivalent code	TSOP6,.11,37
Package shape	RECTANGULAR
Package form	SMALL OUTLINE, LOW PROFILE, SHRINK PITCH
Peak Reflow Temperature (Celsius)	260
power supply	1.2/5 V
Certification status	Not Qualified
Maximum seat height	1.45 mm
Maximum supply voltage (Vsup)	5.5 V
Minimum supply voltage (Vsup)	1 V
surface mount	YES
technology	BICMOS
Temperature level	INDUSTRIAL
Terminal form	GULL WING
Terminal pitch	0.95 mm
Terminal location	DUAL
Maximum time at peak reflow temperature	40
width	1.625 mm

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19-2535; Rev 1; 12/05

Low-Power, Single-/Dual-Level Battery Monitors

with Hysteresis and Integrated µP Reset

General Description

The MAX6439–MAX6442 are a family of ultra-low-power

battery monitors with integrated microprocessor (µP)

supervisors. The battery monitors are offered with sin-

gle or dual low-battery output options that can be used

to signal when the battery is OK (enabling full system

operation), when the battery is low (for low-power sys-

tem operation), and when the battery is dead (to dis-

able system operation). These devices also have an

independent µP supervisor that monitors V

and pro-

vides an active-low reset output. A manual reset func-

tion is available to reset the µP with a push-button. No

external components are required.

The MAX6439–MAX6442 are offered with several facto-

ry-trimmed low-battery threshold combinations ideal for

single-cell lithium-ion (Li+) or multicell alkaline/NiCd/

NiMH applications. When the battery voltage drops

below each specified low threshold, the low-battery out-

puts are asserted to alert the system. When the voltage

rises above the specified high thresholds, the outputs

are deasserted after a 150ms minimum timeout period,

ensuring the voltages have stabilized before power cir-

cuitry is activated or providing microprocessor reset tim-

ing. The low and high thresholds provide hysteresis in

battery-operated systems to eliminate output chattering.

The MAX6439/MAX6440 offer factory-trimmed battery

monitors with a single output. The MAX6441/MAX6442

offer factory-trimmed battery monitors with dual outputs.

All battery monitors have open-drain low-battery outputs.

The MAX6439–MAX6442 monitor system voltages

) from 1.8V to 3.3V with seven fixed reset threshold

options. Each device is offered with two minimum reset

timeout periods of 150ms or 1200ms. The MAX6439/

MAX6441 are offered with an open-drain

RESET

output

and the MAX6440/MAX6442 are offered with a push-

pull

RESET

output.

The MAX6439–MAX6442 are offered in a SOT23 pack-

age and are fully specified over a -40°C to +85°C temp-

erature range.

Features

♦

Factory-Trimmed V

BATT

Threshold Options for

Monitoring Single-Cell Li+ or Multicell

Alkaline/NiCd/NiMH Applications

♦

Immune to Short Battery Voltage Transients

♦

Low Current (2.5µA typ at 3.6V)

♦

Single and Dual Low-Battery Output Options

♦

150ms Minimum

LBO

Timeout Period

♦

Independent µP Reset with Manual Reset

♦

Factory-Set Reset Thresholds for Monitoring V

from 1.8V to 3.3V

♦

Available with 150ms (min) and 1.2s (min) V

Reset Timeout Period Options

♦

-40°C to +85°C Operating Temperature Range

♦

Small 6- and 8-Pin SOT23 Packages

♦

No External Components

MAX6439–MAX6442

Ordering Information

PART

MAX6439UT_

_ _D_-T

MAX6440UT_

_ _D_-T

MAX6441KA_

_ _D_-T

MAX6442KA_

_ _D_-T

TEMP RANGE

-40°C to +85°C

PIN-PACKAGE

6 SOT23-6

8 SOT23-8

Note:

The first two “_ _” are placeholders for the battery moni-

tor voltage levels. Desired threshold levels are set by the part

number suffix found in Tables 1 and 2. The third “_” is the V

reset threshold level suffix found in Table 3. The “_” after the D

is a placeholder for the reset timeout period suffix found in

Table 4. All devices are available in tape-and-reel only. There

is a 2500-piece minimum order increment for standard ver-

sions. Sample stock is typically held on standard versions only.

Nonstandard versions require a minimum order increment of

10,000 pieces. Contact factory for availability.

Devices are available in both leaded and lead-free packaging.

Specify lead-free by replacing “-T” with “+T” when ordering.

Applications

Battery-Powered Systems (Single-Cell Li+ or

Two-/Three-Cell NiMH, NiCd, Alkaline)

Cell Phones/Cordless Phones

Portable Medical Devices

Electronic Toys

Pagers

PDAs

MP3 Players

LBO

Pin Configurations

TOP VIEW

BATT

MAX6439

MAX6440

GND

RESET

SOT23-6

Pin Configurations continued at end of data sheet.

________________________________________________________________

Maxim Integrated Products

For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at

1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.

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