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MAX1537ETX

更新时间： 2024-11-24 21:53:51

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	764K
描述
High-Efficiency, 5x Output, Main Power-Supply Controllers for Notebook Computers

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MAX1537ETX 数据手册

19-3501; Rev 0; 11/04

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

Controllers for Notebook Computers

General Description

Features

The MAX1533/MAX1537 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 (MAX1537 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

MAX1533/MAX1537 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 MAX1533/MAX1537 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

MAX1533 is available in a 32-pin 5mm x 5mm thin QFN

package, and the MAX1537 is available in a 36-pin

6mm x 6mm thin QFN package. The exposed backside

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

MAX1533

DL3

Ordering Information

LDO3

GND

18 FB3

PART

TEMP RANGE PIN-PACKAGE

CSL3

MAX1533ETJ

MAX1533ETJ+

MAX1537ETX

-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

MAX1537ETX+ -40°C to +85°C 36 Thin QFN 6mm x 6mm

+Denotes lead-free package.

THIN QFN

5mm x 5mm

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MAX1537ETX相关器件

型号	品牌	获取价格	描述	数据表
MAX1537ETX-T	MAXIM	获取价格	Switching Controller, Current-mode, 500kHz Switching Freq-Max, BICMOS, 6 X 6 MM, 0.8 MM HE
MAX1538	MAXIM	获取价格	Power-Source Selector for Dual-Battery Systems
MAX1538	ADI	获取价格	电源选择器，用于双电池系统
MAX1538ETI	MAXIM	获取价格	Power-Source Selector for Dual-Battery Systems
MAX1538ETI+	MAXIM	获取价格	Power Supply Support Circuit, Fixed, 1 Channel, BICMOS, 5 X 5 MM, 0.80 MM HEIGHT, MO-220WH
MAX1538ETI-T	MAXIM	获取价格	Power Supply Support Circuit, Fixed, 1 Channel, BICMOS, 5 X 5 MM, 0.80 MM HEIGHT, MO-220WH
MAX1538EVKIT	MAXIM	获取价格	Evaluation Kit for the MAX1538
MAX153C/D	MAXIM	获取价格	1Msps, レP-Compatible, 8-Bit ADC with 1レA Powe
MAX153CAP	MAXIM	获取价格	1Msps, レP-Compatible, 8-Bit ADC with 1レA Powe
MAX153CAP+T	MAXIM	获取价格	ADC, Flash Method, 8-Bit, 1 Func, 1 Channel, Parallel, 8 Bits Access, CMOS, PDSO20, SSOP-2

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