MAX1678EUA

更新时间： 2024-09-30 22:24:35

品牌	Logo	应用领域
美信 - MAXIM		转换器
页数	文件大小	规格书
12页	167K
描述
1-Cell to 2-Cell, Low-Noise, High-Efficiency, Step-Up DC-DC Converter

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替代型号

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MAX1678EUA 数据手册

19-1381; Rev 0; 7/98

1 -Ce ll t o 2 -Ce ll, Lo w -No is e ,

Hig h -Effic ie n c y, S t e p -Up DC-DC Co n ve rt e r

MAX1678

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

Fe a t u re s

The MAX1678 is a high-efficiency, low-voltage, syn-

chronous-rectified, step-up DC-DC converter intended

for use in de vic e s p owe re d b y 1 to 3-c e ll a lka line ,

NiMH, or NiCd batteries or a 1-cell lithium battery. It

guarantees a 0.87V start-up voltage and features a low

37µA quiescent supply current.

♦ 0.87V Guaranteed Start-Up

♦ Up to 90% Efficiency

♦ Built-In Synchronous Rectifier (no external diode)

♦ Ultra-Small µMAX Package, 1.1mm High

♦ 37µA Quiescent Current (85µA from 1.5V battery)

♦ 2µA Logic-Controlled Shutdown

The device includes a 1Ω, N-channel MOSFET power

switch, a synchronous rectifier that acts as the catch

diode, a reference, pulse-frequency-modulation (PFM)

control circuitry, and circuitry to reduce inductor ring-

ing—all in an ultra-small, 1.1mm-high µMAX package.

♦ Power-Fail Detector

♦ Dual Mode™ Output: Fixed 3.3V

The output voltage is preset to 3.3V or can be adjusted

from +2V to +5.5V using only two resistors. Efficiencies

up to 90% are achieved for loads up to 50mA. The

d e vic e a ls o fe a ture s a n ind e p e nd e nt und e rvolta g e

comparator (PFI/PFO) and a logic-controlled 2µA shut-

down mode.

Adjustable 2V to 5.5V

♦ 45mA Output Current at 3.3V for 1-Cell Input

♦ 90mA Output Current at 3.3V for 2-Cell Input

♦ Inductor-Damping Switch Suppresses EMI

Ord e rin g In fo rm a t io n

Ap p lic a t io n s

PART

TEMP. RANGE

PIN-PACKAGE

Pagers

MAX1678EUA

-40°C to +85°C

8 µMAX

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

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

P in Co n fig u ra t io n

INPUT

0.87V TO V

TOP VIEW

OUT

OUTPUT

3.3V

OUT

MAX1678

BATT

PFI

OUT

BATT

SHDN

OFF

MAX1678

PFO

GND

PFI

GND

PFO

LOW-BATTERY

DETECTOR INPUT

LOW-BATTERY

DETECTOR OUTPUT

SHDN

µMAX

Dual Mode is a trademark of Maxim Integrated Products.

________________________________________________________________ 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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MAX1678EUA 替代型号

型号	品牌	替代类型	描述	数据表
MAX1678EUA+	MAXIM	完全替代	Switching Regulator, Voltage-mode, 1A, 150kHz Switching Freq-Max, BICMOS, PDSO8, 1.10 MM H
MAX1678EUA+T	MAXIM	类似代替	Switching Regulator, Voltage-mode, 1A, 150kHz Switching Freq-Max, BICMOS, PDSO8, 1.10 MM H
MAX1678EUA-T	MAXIM	类似代替	Analog IC

与MAX1678EUA相关器件

型号	品牌	获取价格	描述	数据表
MAX1678EUA+	MAXIM	获取价格	Switching Regulator, Voltage-mode, 1A, 150kHz Switching Freq-Max, BICMOS, PDSO8, 1.10 MM H
MAX1678EUA+T	MAXIM	获取价格	Switching Regulator, Voltage-mode, 1A, 150kHz Switching Freq-Max, BICMOS, PDSO8, 1.10 MM H
MAX1678EUA-T	MAXIM	获取价格	Analog IC
MAX1678EVKIT	MAXIM	获取价格	Evaluation Kit for the MAX1678
MAX1679	MAXIM	获取价格	Single-Cell Li Battery Charger for Current-Limited Supply
MAX1679EUA	MAXIM	获取价格	Single-Cell Li Battery Charger for Current-Limited Supply
MAX1679EUA+T	MAXIM	获取价格	Battery Charge Controller, PDSO8, UMAX-8
MAX1679EUA-T	MAXIM	获取价格	Battery Charge Controller, PDSO8, UMAX-8
MAX167ACNG	MAXIM	获取价格	CMOS 12-Bit A/D Converters With Track-and-Hold
MAX167ACNG+	MAXIM	获取价格	ADC, Successive Approximation, 12-Bit, 1 Func, Parallel, 8 Bits Access, CMOS, PDIP24, PLAS

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