Rainbow-electronics MAX1853 Manual de usuario descargar pdf (Pagina 1)

General Description

The MAX1852/MAX1853 monolithic, CMOS charge-

pump voltage inverters in the ultra-small SC70 package

feature a low 15Ω output resistance, permitting loads

up to 30mA with maximum efficiency. The MAX1852/

MAX1853 are available with operating frequencies of

50kHz and 200kHz, respectively, allowing optimization

of supply current or external component size. Small

external components and micropower shutdown mode

make these devices ideal for both battery-powered and

board-level voltage conversion applications.

Oscillator control circuitry and four power-MOSFET

switches are included on-chip. Applications include

generating a negative supply from a +5V or +3.3V logic

supply to power analog circuitry. Both versions come in

a 6-pin SC70 package that is 40% smaller than a

SOT23.

Applications

Negative Supply from +5V or +3.3V Logic Supplies

Small LCD Panels

GaAsFET Bias Supplies

Handy-Terminals, PDAs

Battery-Operated Equipment

Features

♦ 30mA Output Current

♦ Low 15Ω Output Resistance

♦ 68µA Supply Current (MAX1852)

♦ Requires Only Two 0.68µF Capacitors (MAX1853)

♦ +2.5V to +5.5V Input Voltage Range

♦ 0.1µA Logic-Controlled Shutdown

♦ Two Switching Frequencies

50kHz (MAX1852)

200kHz (MAX1853)

♦ Slew-Rate Limited to Reduce EMI

♦ Ultra-Small 6-Pin SC70 Package

MAX1852/MAX1853

SC70 Inverting Charge Pumps

with Shutdown

________________________________________________________________ Maxim Integrated Products 1

TOP VIEW

GND

C1-

C1+

OUT

SC70-6

MAX1852

MAX1853

SHDN

Pin Configuration

C1+ C1-

SHDN

OUT

GND

0.68µF

OFF

INPUT

2.5V TO 5.5V

NEGATIVE

OUTPUT

-1

30mA

MAX1853

Typical Operating Circuit

19-1792; Rev 0; 9/00

Ordering Information

For free samples and the latest literature, visit www.maxim-ic.com or phone 1-800-998-8800.

For small orders, phone 1-800-835-8769.

PART

TEMP.

RANGE

PIN -

PA C K A G E

TOP

MARK

MAX1852EXT - 40°C to + 85°C 6 SC70 AAL

MAX1853EXT - 40°C to + 85°C 6 SC70 AAM

1 2 3 4 5 6 7 8

Indice de contenidos

Pagina 1 - SC70 Inverting Charge Pumps

General DescriptionThe MAX1852/MAX1853 monolithic, CMOS charge-pump voltage inverters in the ultra-small SC70 packagefeature a low 15Ω output resistan

Pagina 2

MAX1852/MAX1853SC70 Inverting Charge Pumpswith Shutdown2 _______________________________________________________________________________________ABSOLU

Pagina 3

MAX1852/MAX1853SC70 Inverting Charge Pumpswith Shutdown_______________________________________________________________________________________ 3121416

Pagina 4

MAX1852/MAX18534 _______________________________________________________________________________________SC70 Inverting Charge Pumpswith Shutdown505352

Pagina 5

Detailed DescriptionThe MAX1852/MAX1853 charge pumps invert the volt-age applied to their input. For highest performance uselow equivalent series resi

Pagina 6

MAX1852/MAX1853SC70 Inverting Charge Pumpswith Shutdown6 _______________________________________________________________________________________Input

Pagina 7

MAX1852/MAX1853SC70 Inverting Charge Pumpswith Shutdown_______________________________________________________________________________________ 7Table

Pagina 8

Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses arei

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