MAX1540AETJ+T

更新时间： 2024-11-06 13:10:23

品牌	Logo	应用领域
美信 - MAXIM		稳压器控制器
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49页	835K
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MAX1540AETJ+T 数据手册

19-2861; Rev 2; 1/05

Dual Step-Down Controllers with Saturation

Protection, Dynamic Output, and Linear Regulator

General Description

Features

♦ Inductor-Saturation Protection

The MAX1540/MAX1541 dual pulse-width modulation

(PWM) controllers provide the high efficiency, excellent

transient response, and high DC-output accuracy nec-

essary for stepping down high-voltage batteries to gen-

erate low-voltage chipset and RAM power supplies in

notebook computers.

♦ Accurate Differential Current-Sense Inputs

♦ Dual Ultra-High-Efficiency Quick-PWMs with

100ns Load-Step Response

♦ MAX1540

1.8V/1.2V Fixed or 0.7V to 5.5V Adjustable

Output (OUT1)

The Maxim proprietary Quick-PWM™ controllers are

free running, constant on-time with input feed forward.

This configuration provides ultra-fast transient

response, wide input-output (I/O) differential range, low

supply current, and tight load-regulation characteris-

tics. The controllers can accurately sense the inductor

current across an external current-sense resistor in

series with the output to ensure reliable overload and

inductor saturation protection. Alternatively, the con-

trollers can use the synchronous rectifier itself or loss-

less inductor current-sensing methods to provide

overload protection with lower power dissipation.

2.5V/1.5V Fixed or 0.7V to 5.5V Adjustable

Output (OUT2)

Fixed 5V, 100mA Linear Regulator

♦ MAX1541

External Reference Input (REFIN1)

Dynamically Selectable Output Voltage—0.7V

to 5.5V (OUT1)

2.5V/1.8V Fixed or 0.7V to 5.5V Adjustable

Output (OUT2)

Optional Power-Good and Fault Blanking

During Transitions

Fixed 5V or Adjustable 100mA Linear Regulator

For a single step-down PWM controller with inductor-

saturation protection, external-reference input voltage,

and dynamically selectable output voltages, refer to the

MAX1992/MAX1993 data sheet.

♦ 1% V

Accuracy over Line and Load

OUT

♦ 2V to 28V Battery Input Range

♦ 170kHz to 620kHz Selectable Switching

Frequency

Applications

♦ Overvoltage/Undervoltage-Protection Option

♦ 1.7ms Digital Soft-Start

Notebook Computers

Core/IO Supplies as Low as 0.7V

0.7V to 5.5V Supply Rails

♦ Drives Large Synchronous-Rectifier FETs

♦ 2V 0.7% Reference Output

♦ Separate Power-Good Window Comparators

CPU/Chipset/GPU with Dynamic Voltage Core

Supplies (MAX1541)

Pin Configurations

DDR Memory Termination (MAX1541)

Active Termination Buses (MAX1541)

TOP VIEW

Ordering Information

OVP/UVP

SKIP

24 LX1

23 BST1

22 LDOON

21 DL1

PART

TEMP RANGE PIN-PACKAGE

LSAT

MAX1540ETJ

MAX1541ETL

-40°C to +85°C 32 Thin QFN 5mm x 5mm

-40°C to +85°C 40 Thin QFN 6mm x 6mm

TON

MAX1540

20 LDOOUT

19 V+

ILIM1

ILIM2

REF

18 DL2

17 GND

THIN QFN

Pin Configurations continued at end of data sheet.

Quick-PWM 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...49

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MAX1540AETJ+T 替代型号

型号	品牌	替代类型	描述	数据表
MAX1540AETJ	MAXIM	类似代替	Dual Step-Down Controllers with Saturation Protection, Dynamic Output, and Linear Regulato

与MAX1540AETJ+T相关器件

型号	品牌	获取价格	描述	数据表
MAX1540ETJ	MAXIM	获取价格	Dual Step-Down Controllers with Saturation Protection, Dynamic Output, and Linear Regulato
MAX1540ETJ+T	MAXIM	获取价格	Dual Switching Controller, Current-mode, 620kHz Switching Freq-Max, BICMOS, PQCC32, 5 X 5
MAX1540ETJ-T	MAXIM	获取价格	Dual Switching Controller, Current-mode, 620kHz Switching Freq-Max, BICMOS, 5 X 5 MM, 0.80
MAX1541	MAXIM	获取价格	Dual Step-Down Controllers with Saturation Protection, Dynamic Output, and Linear Regulato
MAX1541	ADI	获取价格	双路、降压型控制器，带有电感饱和保护、动态输出和线性稳压器
MAX1541ETL	MAXIM	获取价格	Dual Step-Down Controllers with Saturation Protection, Dynamic Output, and Linear Regulato
MAX1541ETL+T	MAXIM	获取价格	Dual Switching Controller, Current-mode, 620kHz Switching Freq-Max, BICMOS, PQCC40, 6 X 6
MAX1541ETL-T	MAXIM	获取价格	Dual Switching Controller, Current-mode, 620kHz Switching Freq-Max, BICMOS, 6 X 6 MM, 0.80
MAX1541EVKIT	MAXIM	获取价格	Evaluation Kit for the MAX1541
MAX1542	MAXIM	获取价格	TFT LCD DC-to-DC Converter with Operational Amplifiers

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