Rainbow-electronics MAX17083 Manual do Utilizador descarregar pdf (Página 1)

General Description

The MAX17083 is a fixed-frequency, current-mode,

step-down regulator optimized for low-voltage, low-

power applications. This regulator features dual internal

n-channel MOSFET power switches for high efficiency

and reduced component count. External Schottky

diodes are not required. An integrated boost switch

eliminates the need for an external boost diode. The

internal 25mΩ low-side power MOSFET easily supports

continuous load currents up to 5A. The MAX17083 pro-

duces an adjustable 0.75V to 2.7V output voltage from

the system’s 3.3V or 5V input supply.

This step-down regulator uses a peak current-mode

control scheme to eliminate the additional external

compensation required by voltage-mode architectures,

providing an easy-to-implement architecture without

sacrificing fast transient response. The MAX17083 pro-

vides peak current-limit protection and operates in

light-load pulse-skipping mode to maintain high effi-

ciency under light-load conditions.

Independent enable input and open-drain power-good

output allow flexible system power sequencing. The volt-

age soft-start gradually ramps up the output voltage

within a predictable time period, effectively limiting the

inrush current. The MAX17083 features output undervolt-

age, output overvoltage, and thermal-fault protection.

The MAX17083 is available in a 24-pin 4mm x 4mm x

0.75mm TQFN package. The exposed backside pad

improves thermal characteristics.

Features

o Fixed-Frequency, Current-Mode Controller

o 2.4V to 5.5V Input Range

o Internal 5A Step-Down Regulator

o Internal BST Switch

o Fault Protection: Undervoltage, Overvoltage,

Thermal, Peak Current Limit

o Enable Input and Power-Good Output

o Voltage-Controlled Soft-Start

o High-Impedance Shutdown

o < 1µA (typ) Shutdown Current

MAX17083

Low-Voltage, Internal Switch,

Step-Down Regulator

________________________________________________________________

Maxim Integrated Products

TQFN

4mm x 4mm

MAX17083

12 3456

18 17 16 15 14 13

N.C.

PGND

N.C.

FREQ

POK

SET

PGND

GND

N.C.

GND

REF

GND

BST

TOP VIEW

Pin Configuration

19-4458; Rev 0; 2/09

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.

Ordering Information

PART TEMP RANGE PIN-PACKAGE

MAX17083ETG+ -40°C to +85°C 24 TQFN

Denotes a lead(Pb)-free/RoHS-compliant package.

Applications

Low-Power Architectures

Ultra-Mobile PCs

Netbook and Nettop PCs

Portable Gaming

Notebook and Subnotebook Computers

PDAs and Mobile Communicators

1 2 3 4 5 6 ... 14 15

Resumo do Conteúdo

Página 1 - Step-Down Regulator

General DescriptionThe MAX17083 is a fixed-frequency, current-mode,step-down regulator optimized for low-voltage, low-power applications. This regulat

Página 2

MAX17083SMPS Detailed DescriptionFixed-Frequency,Current-Mode PWM ControllerThe heart of the current-mode PWM controller is a multi-stage, open-loop c

Página 3

MAX17083Low-Voltage, Internal Switch,Step-Down Regulator______________________________________________________________________________________ 11curve

Página 4

(ILOAD) determines the thermal stresses and thus dri-ves the selection of input capacitors, MOSFETs, andother critical heat-contributing components.•

Página 5

MAX17083Low-Voltage, Internal Switch,Step-Down Regulator______________________________________________________________________________________ 13Addit

Página 6

For the MAX17083 system (IN) supply, ceramic capaci-tors are preferred due to their resilience to inrush surgecurrents typical of systems, and due to

Página 7

MAX17083Low-Voltage, Internal Switch,Step-Down RegulatorMaxim cannot assume responsibility for use of any circuitry other than circuitry entirely embo

Página 8

MAX17083Low-Voltage, Internal Switch,Step-Down Regulator2 _______________________________________________________________________________________ABSOL

Página 9

MAX17083Low-Voltage, Internal Switch,Step-Down Regulator_______________________________________________________________________________________ 3PARAM

Página 10

EFFICIENCY vs. LOAD CURRENT(VIN = 5V, 1MHz)MAX17083 toc01LOAD CURRENT (A)EFFICIENCY (%)0.01 0.1 160708090100500.001 10VOUT = 0.75VVOUT = 1.8VVOUT = 1.

Página 11

MAX17083Low-Voltage, Internal Switch,Step-Down Regulator_______________________________________________________________________________________ 5EFFIC

Página 12

MAX17083Low-Voltage, Internal Switch,Step-Down Regulator6 _______________________________________________________________________________________Typic

Página 13

MAX17083Low-Voltage, Internal Switch,Step-Down Regulator_______________________________________________________________________________________ 7Pin D

Página 14

MAX17083Low-Voltage, Internal Switch,Step-Down Regulator8 _______________________________________________________________________________________Detai

Página 15

MAX17083Low-Voltage, Internal Switch,Step-Down Regulator_______________________________________________________________________________________ 9INLXP

Comentários a estes Manuais

Sem comentários

Rainbow-electronics MAX17083 Manual do Utilizador Página 1

Consulte online ou descarregue Manual do Utilizador para Sensores Rainbow-electronics MAX17083. Rainbow Electronics MAX17083 User Manual Manual do Utilizador

Resumo do Conteúdo

Comentários a estes Manuais

Rainbow-electronics MAX17083 Manual do Utilizador Página 1

Consulte online ou descarregue Manual do Utilizador para Sensores Rainbow-electronics MAX17083. Rainbow Electronics MAX17083 User Manual Manual do Utilizador

Resumo do Conteúdo

Comentários a estes Manuais

Manuais e produtos relacionados com Sensores Rainbow-electronics MAX17083