Rainbow-electronics MAX15032 Manual de usuario descargar pdf

General Description

The MAX15032 constant-frequency, pulse-width-modu-

lating (PWM), low-noise boost converter is intended for

low-voltage systems that need a locally generated high

voltage. This device is capable of generating low-noise,

high output voltages, with an output power capability

up to 600mW with a 2.9V input voltage. This device can

be used for a wide variety of applications, such as PIN

or varactor diode biasing and LCD displays. The

MAX15032 operates from +2.7V to +11V.

The constant-frequency (500kHz), current-mode PWM

architecture provides low-noise output voltage that is

easy to filter. A high-voltage internal lateral DMOS

power switch allows this device to boost output volt-

ages up to 36V. The MAX15032 features a shutdown

mode to save power.

The MAX15032 is available in a small thermally

enhanced 3mm x 3mm 8-pin TDFN package and is

specified for operation over the -40°C to +125°C auto-

motive temperature range.

Applications

Avalanche Photodiode Biasing

PIN Diode Bias Supplies

Low-Noise Varactor Diode Bias Supplies

STB Audio IC Supplies

LCD Displays

Features

o Input Voltage Range

+2.7V to +5.5V (Using Internal Charge Pump)

+5.5V to +11V

o Wide Adjustable Output Voltage Range: (V

+ 1V)

to 36V

o Output Power: ≥ 600mW for V

≥ 2.9V

o Internal 0.5Ω (typ), 40V Switch

o Constant PWM Frequency Provides Easy Filtering

in Low-Noise Applications

o 500kHz (typ) Switching Frequency

o 0.5µA (max) Shutdown Current

o Internal Soft-Start

o Small Thermally Enhanced 3mm x 3mm 8-Pin

TDFN Package

MAX15032

500kHz, 36V Output, 600mW PWM

Step-Up DC-DC Converter

________________________________________________________________

Maxim Integrated Products

865

PGND CN IN

MAX15032

LX FB SHDNGND

TDFN

TOP VIEW

Pin Configuration

Ordering Information

MAX15032

INV

= 2.7V TO 5.5V

OUT

36V

SHDN

PGND

GND

OUT

Typical Operating Circuit

19-4232; Rev 0; 8/08

For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,

or visit Maxim’s website at www.maxim-ic.com.

PART

TEMP RANGE

PIN-

PACKAGE

TOP

MARK

MAX15032ATA+T

-40°C to +125°C 8 TDFN-EP*

+BKP

Denotes a lead-free/RoHS-compliant package.

T = Tape and reel.

EP = Exposed pad.

1 2 3 4 5 6 7 8 9 10

MAX15032 1
Step-Up DC-DC Converter 1

Indice de contenidos

Pagina 1 - Step-Up DC-DC Converter

General DescriptionThe MAX15032 constant-frequency, pulse-width-modu-lating (PWM), low-noise boost converter is intended forlow-voltage systems that n

Pagina 2

MAX15032500kHz, 36V Output, 600mW PWM Step-Up DC-DC ConverterMaxim cannot assume responsibility for use of any circuitry other than circuitry entirely

Pagina 3

MAX15032500kHz, 36V Output, 600mW PWM Step-Up DC-DC Converter2 _______________________________________________________________________________________

Pagina 4

MAX15032500kHz, 36V Output, 600mW PWM Step-Up DC-DC Converter_______________________________________________________________________________________ 3

Pagina 5

MAX15032500kHz, 36V Output, 600mW PWM Step-Up DC-DC Converter4 _______________________________________________________________________________________

Pagina 6

MAX15032500kHz, 36V Output, 600mW PWM Step-Up DC-DC Converter_______________________________________________________________________________________5L

Pagina 7

MAX15032500kHz, 36V Output, 600mW PWM Step-Up DC-DC Converter6 _______________________________________________________________________________________

Pagina 8

MAX15032500kHz, 36V Output, 600mW PWM Step-Up DC-DC Converter_______________________________________________________________________________________ 7

Pagina 9

MAX15032Determining Peak Inductor CurrentIf the boost converter remains in the discontinuousmode of operation, then the approximate peak inductorcurre

Pagina 10

discharge equals 50% (proportions could vary), calcu-late the output capacitance and ESR required for a spec-ified ripple using the following equation

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Rainbow-electronics MAX15032 Manual de usuario

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