Rainbow-electronics MAX684 Manuale Utente Scaricare il pdf

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.

General Description

The MAX682/MAX683/MAX684 charge-pump regula-

tors generate 5V from a 2.7V to 5.5V input. They are

specifically designed to serve as high-efficiency auxil-

iary supplies in applications that demand a compact

design. The MAX682, MAX683, and MAX684 deliver

250mA, 100mA, and 50mA output current, respectively.

These complete 5V regulators require only one resistor

and three external capacitors—no inductors are need-

ed. High switching frequencies (externally adjustable

up to 2MHz) and a unique regulation scheme allow the

use of capacitors as small as 1µF per 100mA of output

current. The MAX683/MAX684 are offered in a space-

saving 8-pin µMAX package that is only 1.1mm high,

while the MAX682 is available in an 8-pin SO.

Applications

Flash Memory Supplies

Battery-Powered Applications

Miniature Equipment

PCMCIA Cards

3.3V to 5V Local Conversion Applications

Backup-Battery Boost Converters

3V to 5V GSM SIMM Cards

Features

♦ Ultra-Small: 1µF Capacitors per 100mA of Output

Current

♦ No Inductors Required

♦ 1.1mm Height in µMAX Package (MAX683/MAX684)

♦ Up to 250mA Output Current (MAX682)

♦ Regulated ±4% Output Voltage

♦ 50kHz to 2MHz Adjustable Switching Frequency

♦ 2.7V to 5.5V Input Voltage

♦ 100µA Quiescent Current in Pulse-Skipping Mode

♦ 0.1µA Shutdown Current

MAX682/MAX683/MAX684

3.3V-Input to Regulated 5V-Output

Charge Pumps

________________________________________________________________

Maxim Integrated Products

CXN

PGNDGND

OUT

CXPSHDN

SKIP

TOP VIEW

MAX682

CXN

PGNDGND

OUT

CXPSHDN

SKIP

µMAX

MAX683

MAX684

Pin Configurations

OUTPUT

5V/250mA

OUT

SHDN

INPUT

2.7V TO 5.5V

SKIP

EXT

GND PGND

CXN CXP

MAX682

Typical Operating Circuit

19-0177; Rev 1; 8/98

PART

MAX682ESA

MAX683EUA

MAX684EUA -40°C to +85°C

-40°C to +85°C

TEMP. RANGE PIN-PACKAGE

8 SO

8 µMAX

Ordering Information

1 2 3 4 5 6 ... 11 12

MAX682/MAX683/MAX684 1
Charge Pumps 1

Sommario

Pagina 1 - Charge Pumps

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.General

Pagina 2

MAX682/MAX683/MAX6843.3V-Input to Regulated 5V-OutputCharge Pumps10 __________________________________________________________________________________

Pagina 3