MAX1533A

更新时间： 2024-11-25 05:00:35

品牌	Logo	应用领域
美信 - MAXIM		电脑控制器
页数	文件大小	规格书
38页	1409K
描述
High-Efficiency, 5x Output, Main Power-Supply Controllers for Notebook Computers

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MAX1533A 数据手册

19-4023; Rev 0; 4/06

High-Efficiency, 5x Output, Main Power-Supply

Controllers for Notebook Computers

General Description

Features

The MAX1533A/MAX1537A are dual step-down, switch-

mode power-supply (SMPS) controllers with synchro-

nous rectification, intended for main 5V/3.3V power

generation in battery-powered systems. Fixed-frequen-

cy operation with optimal interleaving minimizes input

ripple current from the lowest input voltages up to the

26V maximum input. Optimal 40/60 interleaving allows

the input voltage to go down to 8.3V before duty-cycle

overlap occurs, compared to 180° out-of-phase regula-

tors where the duty-cycle overlap occurs when the

input drops below 10V. Output current sensing pro-

vides accurate current limit using a sense resistor.

Alternatively, power dissipation can be reduced using

lossless inductor current sensing.

♦ Fixed-Frequency, Current-Mode Control

♦ 40/60 Optimal Interleaving

♦ Accurate Differential Current-Sense Inputs

♦ Internal 5V and 3.3V Linear Regulators with

100mA Load Capability

♦ Auxiliary 12V or Adjustable 150mA Linear

Regulator (MAX1537A Only)

♦ Dual Mode™ Feedback—3.3V/5V Fixed or

Adjustable Output (Dual Mode) Voltages

♦ 200kHz/300kHz/500kHz Switching Frequency

♦ Versatile Power-Up Sequencing

Internal 5V and 3.3V linear regulators power the

MAX1533A/MAX1537A and their gate drivers, as well as

external keep-alive loads, up to a total of 100mA. When

the main PWM regulators are in regulation, automatic

bootstrap switches bypass the internal linear regulators,

providing currents up to 200mA from each linear output.

An additional 5V to 23V adjustable internal 150mA linear

regulator is typically used with a secondary winding to

provide a 12V supply.

♦ Adjustable Overvoltage and Undervoltage

Protection

♦ 6V to 26V Input Range

♦ 2V 0.75ꢀ Reference Output

♦ Power-Good Output

♦ Soft-Shutdown

The MAX1533A/MAX1537A include on-board power-up

sequencing, a power-good (PGOOD) output, digital

soft-start, and internal soft-shutdown output discharge

that prevents negative voltages on shutdown. The

MAX1533A is available in a 32-pin 5mm x 5mm thin

QFN package, and the MAX1537A is available in a 36-

pin 6mm x 6mm thin QFN package. The exposed back-

side pad improves thermal characteristics for

demanding linear keep-alive applications.

♦ 5µA (typ) Shutdown Current

Pin Configurations

TOP VIEW

ON5

ON3

24 FB5

Applications

LDO5

DL5

2 to 4 Li+ Cells Battery-Powered Devices

Notebook and Subnotebook Computers

PDAs and Mobile Communicators

FSEL

ILIM3

ILIM5

REF

21 PGND

20 DL3

MAX1533A

Ordering Information

18 FB3

LDO3

GND

PART

TEMP RANGE PIN-PACKAGE

CSL3

MAX1533AETJ

MAX1533AETJ+

-40°C to +85°C 32 Thin QFN 5mm x 5mm

-40°C to +85°C 36 Thin QFN 6mm x 6mm

10 11 12 13 14 15 16

MAX1537AETX

MAX1537AETX+

THIN QFN

5mm x 5mm

+Denotes lead-free package.

Pin Configurations continued at end of data sheet.

Dual Mode is a trademark of Maxim Integrated Products, Inc.

________________________________________________________________ Maxim Integrated Products

For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at

1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.

12 3 4 5 6 7...38

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与MAX1533A相关器件

型号	品牌	获取价格	描述	数据表
MAX1533AETJ	MAXIM	获取价格	High-Efficiency, 5x Output, Main Power-Supply Controllers for Notebook Computers
MAX1533AETJ+	MAXIM	获取价格	High-Efficiency, 5x Output, Main Power-Supply Controllers for Notebook Computers
MAX1533ETJ	MAXIM	获取价格	High-Efficiency, 5x Output, Main Power-Supply Controllers for Notebook Computers
MAX1534	MAXIM	获取价格	High-Efficiency, Triple-Output, Keep-Alive Power Supply for Notebook Computers
MAX1534	ADI	获取价格	高效率、三路输出、不间断电源，用于笔记本电脑
MAX1534ETE	MAXIM	获取价格	High-Efficiency, Triple-Output, Keep-Alive Power Supply for Notebook Computers
MAX1534ETE+T	MAXIM	获取价格	Switching Regulator, 2A, 200kHz Switching Freq-Max, BICMOS, 4 X 4 MM, 0.80 MM HEIGHT, QFN-
MAX1534EVKIT	MAXIM	获取价格	Evaluation Kit for the MAX1534
MAX1535A	MAXIM	获取价格	Highly Integrated Level 2 SMBus Battery Charger
MAX1535AETJ	MAXIM	获取价格	Highly Integrated Level 2 SMBus Battery Charger

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