Datasheet > MAX8597

MAX8597

更新时间： 2023-12-20 18:46:18

品牌	Logo	应用领域
亚德诺 - ADI		控制器
页数	文件大小	规格书
24页	460K
描述
低压差、宽输入电压范围、降压型控制器

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数据手册

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MAX8597 数据手册

19-3505; Rev 1; 6/05

Low-Dropout, Wide-Input-Voltage,

Step-Down Controllers

General Description

Features

♦ Low Dropout with >99.5% Duty Cycle

♦ Lossless High-Side Current Limit

♦ Wide 4.5V to 28V Input Range

The MAX8597/MAX8598/MAX8599 voltage-mode PWM

step-down controllers are designed to operate from a

4.5V to 28V input supply and generate output voltages

down to 0.6V. A proprietary switching algorithm stretch-

es the duty cycle to >99.5% for low-dropout design.

Unlike conventional step-down regulators using a p-

channel high-side MOSFET to achieve high duty cycle,

the MAX8597/MAX8598/MAX8599 drive n-channel

MOSFETs resulting in high efficiency and high-current-

capability designs.

♦ Dynamic Output Voltage Adjustment with

Adjustable Offset (MAX8597)

♦ Remote Voltage Sensing for Both Positive and

Negative Rails (MAX8597)

♦ Tracking Output Through REFIN (MAX8597)

♦ Adjustable Switching Frequency from 200kHz to

1.4MHz

♦ Adjustable Soft-Start

♦ Prebias Startup

The MAX8597 is available in a 20-pin thin QFN pack-

age and is designed for applications that use an analog

signal to control the output voltage with an adjustable

offset, such as DC fan-speed control. This is achieved

with an internal uncommitted operational amplifier. The

MAX8597 is also targeted for tracking output-voltage

applications for chipsets, ASIC and DSP cores, and I/O

supplies. The MAX8598/MAX8599 are available in a 16-

pin thin QFN package and do not have the uncommitted

operational amplifier, reference input, and reference out-

put, but offer an open-drain, power-OK output.

♦ Enable and Power-OK (MAX8598/MAX8599) for

Flexible Sequencing

♦ 25MHz Error Amplifier

♦ Adjustable Hiccup Current Limit for Output

Short-Circuit Protection

♦ Output Overvoltage Protection (MAX8599)

♦ Small, Low-Profile Thin QFN Package

The MAX8597/MAX8598/MAX8599 allow startup with

prebias voltage on the output for applications where a

backup supply or a tracking device may charge the

output capacitor before the MAX8597/MAX8598/

MAX8599 are enabled. In addition, the MAX8599 fea-

tures output overvoltage protection.

Ordering Information

TEMP RANGE PIN-PACKAGE

PART

20 Thin QFN 4mm x 4mm

(T2044-3)

MAX8597ETP

-40°C to +85°C

These controllers also feature lossless high-side peak

inductor current sensing, adjustable current limit, and

hiccup-mode short-circuit protection. Switching fre-

quency is set with an external resistor from 200kHz to

1.4MHz. This wide frequency range combined with a

wide-bandwidth error amplifier enables the loop com-

pensation scheme to give the user ample flexibility to

optimize for cost, size, and efficiency.

20 Thin QFN 4mm x 4mm

(T2044-3)

MAX8597ETP+ -40°C to +85°C

16 Thin QFN 4mm x 4mm

(T1644-4)

MAX8598ETE

-40°C to +85°C

16 Thin QFN 4mm x 4mm

(T1644-4)

MAX8598ETE+ -40°C to +85°C

16 Thin QFN 4mm x 4mm

(T1644-4)

MAX8599ETE

-40°C to +85°C

Applications

Nonisolated Power Modules

16 Thin QFN 4mm x 4mm

(T1644-4)

MAX8599ETE+ -40°C to +85°C

Variable-Speed DC Fan Power Supplies

(MAX8597)

+Denotes lead-free package.

Tracking Power Supplies (MAX8597)

Chipset Power Supplies

Pin Configurations appear at end of data sheet.

________________________________________________________________ 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.

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与MAX8597相关器件

型号	品牌	获取价格	描述	数据表
MAX8597ETP	MAXIM	获取价格	Low-Dropout, Wide-Input-Voltage, Step-Down Controllers
MAX8597ETP+	MAXIM	获取价格	暂无描述
MAX8598	ADI	获取价格	低压差、宽输入电压范围、降压型控制器
MAX8598ETE	MAXIM	获取价格	Low-Dropout, Wide-Input-Voltage, Step-Down Controllers
MAX8598ETE+T	MAXIM	获取价格	Switching Controller, Voltage-mode, 0.035A, 1700kHz Switching Freq-Max, BICMOS, 4 X 4 MM,
MAX8599ETE	MAXIM	获取价格	Low-Dropout, Wide-Input-Voltage, Step-Down Controllers
MAX859C/D	MAXIM	获取价格	3.3V/5V or Adjustable-Output, Step-Up DC-DC Converters
MAX859CSA	MAXIM	获取价格	3.3V/5V or Adjustable-Output, Step-Up DC-DC Converters
MAX859CSA+	MAXIM	获取价格	Switching Regulator, Current-mode, 0.5A, 500kHz Switching Freq-Max, CMOS, PDSO8, 0.150 INC
MAX859CSA+T	MAXIM	获取价格	Switching Regulator, Current-mode, 0.5A, 500kHz Switching Freq-Max, CMOS, PDSO8, 0.150 INC

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