Datasheet > MAX1642-MAX1643

MAX1642-MAX1643

更新时间： 2024-09-15 22:57:59

品牌	Logo	应用领域
美信 - MAXIM		转换器
页数	文件大小	规格书
12页	131K
描述
High-Efficiency, Step-Up DC-DC Converters for 1V Inputs

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MAX1642-MAX1643 数据手册

19-1183; Rev 0; 6/97

Hig h -Effic ie n c y, S t e p -Up

DC-DC Co n ve rt e rs fo r 1 V In p u t s

2/MAX1643

_______________Ge n e ra l De s c rip t io n

____________________________Fe a t u re s

♦ Built-In Synchronous Rectifier

The MAX1642/MAX1643 are high-efficiency, low-voltage,

step-up DC-DC converters intended for devices pow-

ered by a single alkaline cell. They feature low quies-

cent supply currents and are supplied in the ultra-small

µMAX package, which is only 1.1mm high. The guaran-

teed start-up voltage is 0.88V.

♦ 0.88V Guaranteed Start-Up

♦ Ultra-Small µMAX Package: 1.1mm High

♦ 83% Efficiency

Ea c h d e vic e c ons is ts of a n inte rna l 1Ω, N-c ha nne l

MOSFET power switch; a built-in synchronous rectifier

that acts as the catch diode; an oscillator; a reference;

and pulse-frequency-modulation (PFM) control circuitry.

Both devices feature an independent undervoltage

comparator (PFI/PFO). The MAX1642 also includes a

2µA logic-controlled shutdown mode. The MAX1643

offers a dedicated low-battery detector (BATTLO) in

lieu of shutdown.

♦ 4µA Quiescent Supply Current into BATT Pin

♦ 2µA Logic-Controlled Shutdown (MAX1642)

♦ Two Undervoltage Detectors (MAX1643)

♦ 2V to 5.2V Output Range

♦ 20mA Output Current at 1.2V Input

♦ Reverse Battery Protection

The output voltage for each device is preset to 3.3V

±4%, or can be adjusted from +2V to +5.2V using only

two resistors.

______________Ord e rin g In fo rm a t io n

PART

TEMP. RANGE

0°C to +70°C

-40°C to +85°C

0°C to +70°C

-40°C to +85°C

PIN-PACKAGE

Dice*

MAX1642C/D

MAX1642EUA

MAX1643C/D

MAX1643EUA

8 µMAX

Dice*

________________________Ap p lic a t io n s

8 µMAX

Pagers

*Dice are tested at T = +25°C.

Remote Controls

Note: To order these devices shipped in tape and reel, add a -T

to the part number.

Pointing Devices

Personal Medical Monitors

Single-Cell Battery-Powered Devices

_________________P in Co n fig u ra t io n s

TOP VIEW

OUT

BATT

PFI

__________Typ ic a l Op e ra t in g Circ u it

MAX1642

µMAX

GND

PFO

SHDN

INPUT

0.88V TO 1.65V

OUTPUT

3.3V

100µH

OUT

22µF

MAX1642

BATT

OUT

BATT

PFI

SHDN

OFF

MAX1643

µMAX

PFI

GND

PFO

LOW-BATTERY

DETECTOR INPUT

LOW-BATTERY

DETECTOR OUTPUT

GND

BATTLO

PFO

________________________________________________________________ Maxim Integrated Products

For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800.

For small orders, phone 408-737-7600 ext. 3468.

12 3 4 5 6 7...12

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与MAX1642-MAX1643相关器件

型号	品牌	获取价格	描述	数据表
MAX1643	MAXIM	获取价格	High-Efficiency Step-Up DC-DC Converters for 1V Inputs
MAX1643C	MAXIM	获取价格	High-Efficiency, Step-Up DC-DC Converters for 1V Inputs
MAX1643C/D	MAXIM	获取价格	High-Efficiency, Step-Up DC-DC Converters for 1V Inputs
MAX1643C/D-T	MAXIM	获取价格	Switching Regulator, 1A
MAX1643C-T	MAXIM	获取价格	High-Efficiency, Step-Up DC-DC Converters for 1V Inputs
MAX1643D	MAXIM	获取价格	High-Efficiency, Step-Up DC-DC Converters for 1V Inputs
MAX1643D-T	MAXIM	获取价格	High-Efficiency, Step-Up DC-DC Converters for 1V Inputs
MAX1643EUA	MAXIM	获取价格	High-Efficiency, Step-Up DC-DC Converters for 1V Inputs
MAX1643EUA+	MAXIM	获取价格	Switching Regulator, Voltage-mode, 1A, PDSO8, 1.10 MM HEIGHT, ULTRA SMALL, UMAX-8
MAX1643EUA+T	MAXIM	获取价格	Switching Regulator, Voltage-mode, 1A, PDSO8, 1.10 MM HEIGHT, ULTRA SMALL, UMAX-8

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