Datasheet > MAX4919BETD+T

MAX4919BETD+T

更新时间： 2024-11-06 02:50:23

品牌	Logo	应用领域
美信 - MAXIM		电池
页数	文件大小	规格书
19页	317K
描述
Battery Power-Up Logic with Overvoltage and Overcurrent Protection

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MAX4919BETD+T 数据手册

19-0614; Rev 0; 8/06

Battery Power-Up Logic with Overvoltage

and Overcurrent Protection

General Description

Features

The MAX4919B/MAX4920B/MAX4921B overvoltage

protection controllers protect low-voltage systems

against high-voltage faults up to +28V. An internal 1.8A

ꢀ Input Overvoltage Protection Up to +28V

ꢀ Preset Overvoltage Protection Trip Level

6.38V (MAX4919B)

(min) pFET with low R

(100mΩ) switches a battery to

5.80V (MAX4920B)

4.65V (MAX4921B)

the load and also protects the battery against short-cir-

cuit faults. When a short circuit occurs, the current

through the internal pFET is limited for a blanking peri-

od. If the short condition is present after the blanking

period, the switch is latched off and remains off until

one of the input signals (IN, HP_PWR, PWR_ON) is

cycled. The pFET is turned on by a logic-high voltage

at PWR_HOLD, HP_PWR, PWR_ON, or IN .

ꢀ Adapter/Car-Kit Auto-Selector

ꢀ Low-Current Undervoltage Lockout Mode

ꢀ Internal 1.8A (min) Battery Switchover FET

ꢀ Integrated Low-Battery Detect

The overvoltage thresholds (OVLO) are preset to

+6.38V (MAX4919B), +5.80V (MAX4920B), and +4.65V

(MAX4921B). When the input voltage drops below the

undervoltage lockout (UVLO) threshold, the devices enter

a low-current standby mode. In shutdown mode, the

current is reduced to 0.4µA. The MAX4919B/MAX4920B

have a +4.27V UVLO threshold, and the MAX4921B has

a +2.35V UVLO threshold.

ꢀ Battery Short-Circuit Protection

ꢀ Low-Cost External nMOS Overvoltage FET

ꢀ 14-Pin TDFN Package (3mm x 3mm)

Pin Configuration

TOP VIEW

The MAX4919B/MAX4920B/MAX4921B are offered in a

small 14-pin TDFN package (3mm x 3mm) with an

exposed paddle and are specified over the extended

-40°C to +85°C temperature range.

14 13 12 11 10

Applications

Cell Phones

MAX4919B

MAX4920B

MAX4921B

Digital Still Cameras

PDAs and Palmtop Devices

MP3 Players

*EP

TDFN (3mm x 3mm)

*EXPOSED PADDLE

+DENOTES LEAD-FREE PACKAGE

Ordering Information/Selector Guide

PIN-

PACKAGE

PART

OVLO (V)

UVLO (V)

TOP MARK

PKG CODE

MAX4919BETD+T

MAX4920BETD+T

MAX4921BETD+T

14 TDFN-EP*

6.38

5.80

4.65

4.27

2.35

ABY

ABZ

ACA

T1433-2

Note: All devices are specified over the -40°C to +85°C operating temperature range.

+Denotes lead-free package.

*EP = Exposed paddle.

________________________________________________________________ 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.

12 3 4 5 6 7...19

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与MAX4919BETD+T相关器件

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MAX491C	MAXIM	获取价格	Low-Power, Slew-Rate-Limited RS-485/RS-422 Transceivers
MAX491C/D	MAXIM	获取价格	Low-Power, Slew-Rate-Limited RS-485/RS-422 Transceivers
MAX491CPD	MAXIM	获取价格	Low-Power, Slew-Rate-Limited RS-485/RS-422 Transceivers
MAX491CPD	ROCHESTER	获取价格	暂无描述
MAX491CSD	MAXIM	获取价格	Low-Power, Slew-Rate-Limited RS-485/RS-422 Transceivers
MAX491CSD	ROCHESTER	获取价格	LINE TRANSCEIVER, PDSO14, SOIC-14
MAX491CSD+	MAXIM	获取价格	暂无描述
MAX491CSD+T	MAXIM	获取价格	Line Transceiver, 1 Func, 1 Driver, 1 Rcvr, CMOS, PDSO14, 0.150 INCH, SOIC-14
MAX491CSD-T	MAXIM	获取价格	Line Transceiver, 1 Func, 1 Driver, 1 Rcvr, CMOS, PDSO14, SOIC-14
MAX491E	MAXIM	获取价格	Low-Power, Slew-Rate-Limited RS-485/RS-422 Transceivers

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