Rainbow-electronics MAX853 Manuel d'utilisateur télécharger pdf

_______________General Description

The MAX850–MAX853 low-noise, inverting, charge-

pump power supplies are ideal for biasing GaAsFETs in

cellular telephone transmitter amplifiers.

The MAX850–MAX852 offer both preset (-4.1V) and

adjustable (-0.5V to -9.0V) output voltages. The

MAX853 uses an external positive control voltage to set

the negative output voltage. Input voltage range for all

four devices is 4.5V to 10V. Output current is 5mA.

An internal linear regulator reduces the output voltage

ripple to 2mVp-p. With a well-filtered control voltage

CTRL

), the MAX853 achieves typical output ripple of

less than 1mVp-p. Supply current is 3mA max, and

shutdown current is less than 1µA max over temperature

(5µA max for MAX851).

________________________Applications

Cellular Phones

Negative Regulated Power Supplies

Personal Communicators, PDAs

Wireless Data Loggers

Continuously Adjustable GaAsFET Bias

LCD-Bias Contrast Control

____________________________Features

♦ Fixed -4.1V or Adjustable -0.5V to -9V Output at 5mA

♦ 4.5V to 10V Input Voltage Range

♦ 2mVp-p Output Voltage Ripple (MAX850–MAX852)

1mVp-p Output Voltage Ripple (MAX853)

♦ 100kHz Charge-Pump Switching Frequency

(MAX850/MAX851/MAX853)

♦ External Synchronizing Clock Input (MAX852)

♦ Logic-Level Shutdown Mode: 1µA Max Over

Temperature (MAX850/MAX852/MAX853)

♦ Low Cost, 8-Pin SO Package

Low-Noise, Regulated, Negative

Charge-Pump Power Supplies for GaAsFET Bias

________________________________________________________________

Maxim Integrated Products

GND

OUT

FB**

(MAX850–852)

SHDN*

(MAX850/853)

NEGOUT

C1-

C1+

MAX850

MAX851

MAX852

MAX853

TOP VIEW

* SHDN (MAX851)

OSC (MAX852)

** CONT (MAX853)

__________________Pin Configuration

MAX850

MAX851

MAX852



OUT

SHDN*

SHDN

OSC

NEGOUT

C1-

C1+

GND

= 4.5V to 10.0V

(4 CELLS)

OUT

= -4.1V

of GaAsFET)

* MAX850: SHDN

MAX851: SHDN

MAX852: OSC

__________Typical Operating Circuit

19-0238; Rev 2; 4/96

PART

MAX850ISA

MAX850ESA -40°C to +850°C

-25°C to +85°C

TEMP. RANGE PIN-PACKAGE

8 SO

______________Ordering Information

* Dice are specified at T

= +25

C only.

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

MAX851C/D

0°C to +70°C Dice*

MAX851ISA -25°C to +85°C 8 SO

MAX851ESA -40°C to +85°C 8 SO

MAX852C/D

MAX852ISA

MAX852ESA -40°C to +85°C

-25°C to +85°C

0°C to +70°C Dice*

8 SO

ise*

8 SO

MAX853C/D

0°C to +70°C Dice*

MAX853ISA -25°C to +85°C 8 SO

MAX853ESA -40°C to +85°C 8 SO

MAX850C/D

0°C to +70°C Dice*

MAX850–MAX853

EVALUATION KIT MANUAL

FOLLOWS DATA SHEET

1 2 3 4 5 6 7 8

MAX850–MAX853 1

Résumé du contenu

Page 1 - MAX850–MAX853

_______________General DescriptionThe MAX850–MAX853 low-noise, inverting, charge-pump power supplies are ideal for biasing GaAsFETs incellular telepho

Page 2

MAX850–MAX853Low-Noise, Regulated, NegativeCharge-Pump Power Supplies for GaAsFET Bias2 ______________________________________________________________

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MAX850–MAX853Low-Noise, Regulated, NegativeCharge-Pump Power Supplies for GaAsFET Bias________________________________________________________________

Page 4

MAX850–MAX853Low-Noise, Regulated, NegativeCharge-Pump Power Supplies for GaAsFET Bias4 ______________________________________________________________

Page 5

MAX850–MAX853Low-Noise, Regulated, NegativeCharge-Pump Power Supplies for GaAsFET Bias________________________________________________________________

Page 6

MAX850–MAX853Low-Noise, Regulated, NegativeCharge-Pump Power Supplies for GaAsFET Bias6 ______________________________________________________________

Page 7

MAX850–MAX853Low-Noise, Regulated, NegativeCharge-Pump Power Supplies for GaAsFET Bias________________________________________________________________

Page 8

MAX850–MAX853Low-Noise, Regulated, NegativeCharge-Pump Power Supplies for GaAsFET Bias8 ______________________________________________________________

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Rainbow-electronics MAX853 Manuel d'utilisateur

Naviguer en ligne ou télécharger Manuel d'utilisateur pour Capteurs Rainbow-electronics MAX853. Rainbow Electronics MAX853 User Manual Manuel d'utilisatio

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