MAX6847KAZD3-T Maxim Integrated, MAX6847KAZD3-T Datasheet

MAX6847KAZD3-T

Manufacturer Part Number

MAX6847KAZD3-T

Description

Battery Management

Manufacturer

Maxim Integrated

Series

MAX6846, MAX6847, MAX6848, MAX6849r

Datasheet

1.MAX6849KATD7-T.pdf (12 pages)

Specifications of MAX6847KAZD3-T

Maximum Operating Temperature

+ 85 C

Minimum Operating Temperature

- 40 C

Package / Case

SOT-23

Current page: 1 of 12
Download datasheet (254Kb)

The MAX6846–MAX6849 are a family of ultra-low-power

battery monitors with integrated microprocessor (µP)

supervisors. The user-adjustable battery monitors are

offered with single 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 system operation), and when the battery is dead

(to disable system operation). These devices also have

an independent µP supervisor that monitors V

provides an active-low reset output. A manual reset

function is available to reset the µP with a pushbutton.

The MAX6846–MAX6849 are ideal for single-cell lithium-

ion (Li+) or multicell alkaline/NiCd/NiMH applications.

When the battery voltage drops below each adjusted low

threshold, the low-battery outputs are asserted to alert

the system. When the voltage rises above the adjusted

high thresholds, the outputs are deasserted after a

150ms minimum timeout period, ensuring the voltages

have stabilized before power circuitry is activated or pro-

viding microprocessor reset timing.

These devices have user-adjustable battery threshold

voltages, providing a wide hysteresis range to prevent

chattering that can result due to battery recovery after

load removal. Single low-battery outputs are supplied

by the MAX6846/MAX6847 and dual low-battery out-

puts are supplied by the MAX6848/MAX6849. All bat-

tery monitors have open-drain low-battery outputs.

The MAX6846–MAX6849 monitor system voltages

options. Each device is offered with two minimum reset

timeout periods of 150ms or 1200ms. The MAX6846/

MAX6848 are offered with an open-drain RESET output

and the MAX6847/MAX6849 are offered with a push-

pull RESET output.

The MAX6846–MAX6849 are offered in a SOT23 pack-

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

erature range.

19-2947; Rev 1; 11/05

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.

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

Low-Power, Adjustable Battery Monitors with

Battery-Powered Systems (Single-Cell Li+ or

Multicell NiMH, NiCd, Alkaline)

Cell Phones/Cordless Phones

Portable Medical Devices

Digital Cameras

Pagers

PDAs

MP3 Players

Electronic Toys

________________________________________________________________ Maxim Integrated Products

General Description

Hysteresis and Integrated µP Reset

Applications

and

♦ User-Adjustable Thresholds for Monitoring

♦ Single and Dual Low-Battery Output Options

♦ Independent µP Reset with Manual Reset

♦ Factory-Set Reset Thresholds for Monitoring 1.8V

♦ Available with 150ms (min) or 1.2s (min) V

♦ 150ms (min) LBO Timeout Period

♦ Immune to Short-Battery Voltage Transients

♦ Low Current (2.5µA, typ at 3.6V)

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

♦ Small 8-Pin SOT23 Packages

Note: The first “_” is the V

in Table 1. The “_” after the D is a placeholder for the reset

timeout period suffix found in Table 2. All devices are available

in tape-and-reel only. There is a 2500 piece minimum order

increment for standard versions (see Standard Versions table).

Sample stock is typically held on standard versions only. Non-

standard 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.

MAX6846KA_D_-T

MAX6847KA_D_-T

MAX6848KA_D_-T

MAX6849KA_D_-T

TOP VIEW

LTHIN

Single-Cell Li+ or Multicell Alkaline/NiCd/NiMH

Applications

to 3.3V Systems

Reset Timeout Period Options

GND

LBO

PART

MAX6846

MAX6847

SOT23

Ordering Information

HTHIN

RESET

-40°C to +85°C

TEMP RANGE

reset threshold level, suffix found

Pin Configurations

LTHIN

LBOL

GND

MAX6848

MAX6849

SOT23

PIN-PACKAGE

8 SOT23-8

Features

HTHIN

LBOH

RESET

Related parts for MAX6847KAZD3-T

MAX6847KAZD3-T Summary of contents

Page 1

... Portable Medical Devices Digital Cameras Pagers PDAs MP3 Players Electronic Toys ________________________________________________________________ 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. ♦ User-Adjustable Thresholds for Monitoring Single-Cell Li+ or Multicell Alkaline/NiCd/NiMH Applications ♦ ...

Page 2

Low-Power, Adjustable Battery Monitors with Hysteresis and Integrated µP Reset ABSOLUTE MAXIMUM RATINGS GND ....................................................-0.3V to +6V Open-Drain LBO, LBOH, LBOL to GND .................-0.3V to +6V* Open-Drain RESET to GND ....................................-0.3V to +6V* Push-Pull ...

Page 3

Low-Power, Adjustable Battery Monitors with Hysteresis and Integrated µP Reset ELECTRICAL CHARACTERISTICS (continued 1.6V to 5.5V 1.2V to 5.5V PARAMETER SYMBOL LBO, LBOL, LBOH Output Open-Drain Leakage Current V Reset Threshold CC V ...

Page 4

Low-Power, Adjustable Battery Monitors with Hysteresis and Integrated µP Reset (V = 3.6V 3.3V, unless otherwise specified. Typical values are SUPPLY CURRENT vs. TEMPERATURE 3.3V 3. ...

Page 5

Low-Power, Adjustable Battery Monitors with Hysteresis and Integrated µP Reset (V = 3.6V 3.3V, unless otherwise specified. Typical values are NORMALIZED UPPER AND LOWER LBO TRIP VOLTAGES vs. TEMPERATURE 1.050 1.025 1.000 0.975 0.950 ...

Page 6

Low-Power, Adjustable Battery Monitors with Hysteresis and Integrated µP Reset PIN MAX6846/MAX6847 MAX6848/MAX6849 — — — 6 — 4 Detailed Description The MAX6846–MAX6849 family is available ...

Page 7

Low-Power, Adjustable Battery Monitors with Hysteresis and Integrated µP Reset V DD LTHIN LTH DETECT HTHIN HTH LBO TIMEOUT DETECT PERIOD 615mV V CC RESET V TH TIMEOUT DETECT PERIOD 1.23V MR Figure 1a. MAX6847 Functional Diagram Low-Battery Output The ...

Page 8

Low-Power, Adjustable Battery Monitors with Hysteresis and Integrated µP Reset V MONITORED V HTH TRIPHIGH V LTH TRIPLOW LBO V = HYSTERESIS HYST Figure 2. Single Low-Battery Output Timing V MONITORED (V +5%) HTH+ TRIPHIGH V HTH- TRIPHIGH (V +5%) ...

Page 9

Low-Power, Adjustable Battery Monitors with Hysteresis and Integrated µP Reset Many microprocessor-based products require manual reset capability, allowing the operator, a test technician, or external logic circuitry to initiate a reset while the monitored supplies remain above their reset thresholds. ...

Page 10

Low-Power, Adjustable Battery Monitors with Hysteresis and Integrated µP Reset 1) Choose a value for R , the sum of R1, R2, and TOTAL R3. Because the MAX6848/MAX6849 have very high input impedance, R can 500kΩ. TOTAL ...

Page 11

... Hysteresis and Integrated µP Reset OPEN-DRAIN PART RESET MAX6846 X MAX6847 — MAX6848 X MAX6849 — Standard Versions Table PART MAX6846KARD3 MAX6846KASD3 MAX6846KAWD3 MAX6846KAZD3 MAX6847KARD3 MAX6847KASD3 MAX6847KAWD3 MAX6847KAZD3 MAX6848KARD3 MAX6848KASD3 MAX6848KAWD3 MAX6848KAZD3 MAX6849KARD3 MAX6849KASD3 MAX6849KAWD3 MAX6849KAZD3 ______________________________________________________________________________________ PUSH-PULL RESET — X — X TOP MARK AEJI AEJD Li+ 3.6V AEJK ...

Page 12

... Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. 12 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © 2005 Maxim Integrated Products SEE DETAIL "A" ...

Related keywords

MAX6847KAZD3-T datasheet
MAX6847KAZD3-T data sheet
MAX6847KAZD3-T pdf datasheet
MAX6847KAZD3-T component
MAX6847KAZD3-T part
MAX6847KAZD3-T distributor
MAX6847KAZD3-T RoHS
MAX6847KAZD3-T datasheet download