Datasheet > 电源电路 > 开关式稳压器或控制器> MAX1536ETI+

MAX1536ETI+

更新时间： 2024-11-04 21:54:15

品牌	Logo	应用领域
美信 - MAXIM		稳压器开关
页数	文件大小	规格书
19页	369K
描述
3.6A, 1.4MHz, Low-Voltage, Internal-Switch Step-Down Regulator with Dynamic Output Voltage Control

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数据手册
替代型号

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MAX1536ETI+ 数据手册

LCJ/JH 9/22/05 (P1)

19-2729; Rev 1; 8/05

3.6A, 1.4MHz, Low-Voltage, Internal-Switch Step-

Down Regulator with Dynamic Output Voltage Control

General Description

Features

The MAX1536 constant-off-time, pulse-width-modulated

(PWM) step-down DC-to-DC converter is ideal for use in

+5.0V and +3.3V to low voltages for notebook and sub-

notebook computers. The MAX1536 features an internal

PMOS power switch and internal synchronous rectifica-

tion for high efficiency and reduced component count. No

external Schottky diode is required across the internal

synchronous rectifier switch. The internal 54mΩ PMOS

power switch and 47mΩ NMOS synchronous-rectifier

switch easily deliver continuous load currents up to 3.6A.

The MAX1536 produces dynamically adjustable output

voltages for chipsets and graphics processor cores using

a logic-level control signal. The MAX1536 achieves effi-

ciencies as high as 96%.

♦ Dynamically Selectable Output Voltage from

+0.7V to V

♦ Internal PMOS/NMOS Switches

54mΩ/47mΩ On-Resistance at V = +4.5V

63mΩ/53mΩ On-Resistance at V = +3.0V

♦ +3.0V to +5.5V Input Voltage Range

♦ 1.4MHz Maximum Switching Frequency

♦ 2V 0.75ꢀ Reference Output

♦ Constant-Off-Time PWM Operation

♦ Selectable Idle Mode/PWM Operation at Light

Loads

♦ 100ꢀ Duty Factor in Dropout

The MAX1536 uses a unique current-mode, constant-off-

time, PWM control scheme. It has selectable Idle

Mode^TMto maintain high efficiency during light-load

operation, or fixed-PWM mode for low output ripple. The

programmable constant-off-time architecture allows a

wide range of switching frequencies up to 1.4MHz, opti-

mizing performance trade-offs between efficiency, output

switching noise, component size, and cost. The

MAX1536 features a digital soft-start to limit surge cur-

rents during startup, a 100% duty-cycle mode for low-

dropout operation, and a low-power shutdown mode that

disconnects the input from the output and reduces supply

current below 1µA. The MAX1536 is available in a 28-pin

thin QFN package with an exposed backside pad.

♦ Digital Soft-Start Inrush Current Limiting

♦ <1µA Typical Shutdown Supply Current

♦ <750µA Quiescent Supply Current

♦ Thermal Shutdown

♦ 1ꢀ V

Accuracy Over Line and Load

OUT

♦ External Reference Input

♦ Power-Good Window Comparator

♦ Selectable Power-Good Blanking Time During

Output-Voltage Transition

Ordering Information

PART

TEMP RANGE

-40^oC to +85^oC

PIN-PACKAGE

________________________Applications

MAX1536ETI

MAX1536ETI+

28 Thin QFN 5mm x 5mm

Chipset/Graphics Cores

with Dual-Supply Voltages

Notebook Computers

DDR Memory Termination

+Denotes lead-free package.

Active Termination Buses

Pin Configuration

Minimal Operating Circuit

TOP VIEW

OUT

21 20 19 18 17 16 15

+3.0V TO +5.5V

+0.7V TO V

PGND

REF

13 REFIN

LX 24

PGND

AGND

N.C.

SHDN

MAX1536

GATE

MAX1536

REF

COMP

PGND

TOFF

N.C.

EXPOSED PADDLE

PGOOD

PGND

REFIN

TOFF

SKIP

THIN QFN

A "+" SIGN WILL REPLACE THE FIRST PIN INDICATOR ON LEAD-FREE PACKAGES.

Idle 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...19

中文翻译

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MAX1536ETI+ 替代型号

型号	品牌	替代类型	描述	数据表
MAX1536ETI	MAXIM	完全替代	3.6A, 1.4MHz, Low-Voltage, Internal-Switch Step-Down Regulator with Dynamic Output Voltage

与MAX1536ETI+相关器件

型号	品牌	获取价格	描述	数据表
MAX1536ETI-T	MAXIM	获取价格	Switching Regulator, Current-mode, 5.7A, 1400kHz Switching Freq-Max, BICMOS, 5 X 5 MM, TQF
MAX1536EVKIT	MAXIM	获取价格	Evaluation Kit for the MAX1536
MAX1537A	MAXIM	获取价格	High-Efficiency, 5x Output, Main Power-Supply Controllers for Notebook Computers
MAX1537AETX	MAXIM	获取价格	High-Efficiency, 5x Output, Main Power-Supply Controllers for Notebook Computers
MAX1537AETX+	MAXIM	获取价格	High-Efficiency, 5x Output, Main Power-Supply Controllers for Notebook Computers
MAX1537ETX	MAXIM	获取价格	High-Efficiency, 5x Output, Main Power-Supply Controllers for Notebook Computers
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

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