MAX6429AHUR+T datasheet, PDF - EEWORLD Datasheet

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MAX6429AHUR+T: DescriptionPower Supply Support Circuit, Fixed, 1 Channel, BICMOS, PDSO3, SOT-23, 3 PIN; CategoryPower/power management The power supply circuit; File Size374KB，20 Pages; ManufacturerMaxim; Websitehttps://www.maximintegrated.com/en.html; Environmental Compliance

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MAX6429AHUR+T Overview

Power Supply Support Circuit, Fixed, 1 Channel, BICMOS, PDSO3, SOT-23, 3 PIN

MAX6429AHUR+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	TSOP, TO-236
Contacts	3
Reach Compliance Code	compliant
ECCN code	EAR99
Adjustable threshold	NO
Analog Integrated Circuits - Other Types	POWER SUPPLY SUPPORT CIRCUIT
JESD-30 code	R-PDSO-G3
length	2.92 mm
Humidity sensitivity level	1
Number of channels	1
Number of functions	1
Number of terminals	3
Maximum operating temperature	85 °C
Minimum operating temperature	-40 °C
Package body material	PLASTIC/EPOXY
encapsulated code	TSOP
Encapsulate equivalent code	TO-236
Package shape	RECTANGULAR
Package form	SMALL OUTLINE, THIN PROFILE
Peak Reflow Temperature (Celsius)	260
power supply	1.2/5 V
Certification status	Not Qualified
Maximum seat height	1.12 mm
Maximum supply current (Isup)	0.0015 mA
Maximum supply voltage (Vsup)	5.5 V
Minimum supply voltage (Vsup)	1 V
Nominal supply voltage (Vsup)	3.7 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	1.3 mm

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19-2323; Rev 2; 12/05

Low-Power, Single/Dual-Level Battery Monitors

with Hysteresis

MAX6427–MAX6438

General Description

The MAX6427–MAX6438 are single/dual-level battery mon-

itors with internal hysteresis. These devices are offered with

single (MAX6427/MAX6428/MAX6429, MAX6433/

MAX6434/MAX6435) or dual (MAX6430/MAX6431/

MAX6432, MAX6436/MAX6437/MAX6438) low-battery out-

put indicators, which can be used to indicate three battery

conditions: battery is good (operate system in normal

mode), battery is weak (operate system in low-power

mode), or battery is empty (disable the system).

These devices are ideal for monitoring single lithium-ion

(Li+) cells or multicell alkaline/NiCd/NiMH power supplies.

When the power-supply voltage drops below the specified

low threshold, the low-battery output asserts. When the

voltage rises above the specified high threshold, the low-

battery output is deasserted following a 140ms minimum

timeout period. The timeout period ensures that the supply

voltages have stabilized before power-converter or micro-

processor activity is enabled.

The MAX6427–MAX6438 family is available with several

monitoring options. The MAX6427/MAX6428/MAX6429

offer factory-trimmed battery-monitor thresholds, with a sin-

gle low-battery output. The MAX6430/MAX6431/MAX6432

also feature factory-trimmed thresholds, but have two low-

battery outputs.

The MAX6433–MAX6438 have user-adjustable threshold

voltages permitting the user to select the hysteresis range,

and consequently the sensitivity of the system to noise. A

wide hysteresis range also prevents chattering that can

result due to battery recovery after load removal. Single

low-battery outputs are supplied by the MAX6433/

MAX6434/MAX6435 and dual low-battery outputs by the

MAX6436/MAX6437/MAX6438.

The MAX6427–MAX6438 family is available with three out-

put logic options for convenient interface with system

power circuitry or microprocessors. The family is offered in

small SOT23 and SOT143 packages and is fully specified

over temperature.

Features

♦

Factory-Trimmed or User-Adjustable Threshold

Options

Factory-Trimmed Low Thresholds from 1.6V to

2.1V or 2.6V to 3.1V in 100mV Increments

(MAX6427–MAX6432)

Factory-Trimmed High Thresholds from 2.3V to

2.6V or 3.3V to 3.6V in 100mV Increments

(MAX6427–MAX6432)

User-Adjustable Low/High Thresholds with

615mV Internal Reference (MAX6433–MAX6438)

♦

Low Current (1µA, typ)

♦

Single or Dual Low-Battery Outputs

♦

Push-Pull

LBO,

Open-Drain

LBO,

and Open-Drain

LBO Options

♦

140ms Minimum LBO Timeout Period

♦

Immune to Short Battery Voltage Transients

♦

Guaranteed Valid LBO Logic State to BATT = 1.0V

♦

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

♦

Small 3, 4, 5 and 6-Pin SOT Packages

♦

No External Components Required

(MAX6427–MAX6432)

Ordering Information

PART

MAX6427_

_UR-T

†

The

TEMP RANGE

-40°C to +85°C

PIN-PACKAGE

3 SOT23-3

Ordering Information continued at end of data sheet.

MAX6427–MAX6432 are available with factory-trimmed

battery-monitor thresholds. Select the desired thresholds

using Tables 1 or 2 and enter the corresponding letters in

the part number by replacing “_ _”.

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

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

Note:

There are 26 standard versions with a required order

minimum of 2500 pieces. Sample stock is generally held on

the standard versions only (see Standard Versions Table).

Required order increment is 10,000 pieces for nonstandard

versions. Contact factory for availability. All devices avail-

able in tape-and-reel only.

________________________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

Pin Configurations

TOP VIEW

LBO

(LBO)

MAX6427

MAX6428

MAX6429

BATT

GND

SOT23-3

Typical Operating Circuit appears at end of data sheet.

( ) ARE FOR THE MAX6429.

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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