Datasheet > MAX17244

MAX17244

更新时间： 2024-09-19 14:58:03

品牌	Logo	应用领域
亚德诺 - ADI		转换器
页数	文件大小	规格书
18页	1355K
描述
3.5V至36V、2.5A、同步Buck转换器，28μA静态电流和低EMI

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MAX17244 数据手册

EVALUATION KIT AVAILABLE

MAX17244

3.5V–36V, 2.5A, Synchronous Buck Converter

With 28µA Quiescent Current and Reduced EMI

General Description

Beneﬁts and Features

● Eliminates External Components and Reduces

The MAX17244 high-efficiency, synchronous step-down

DC-DC converter with integrated MOSFETs operates

over a 3.5V to 36V input voltage range with 42V input

transient protection. The device can operate in dropout

condition by running at 98% duty cycle. This converter

delivers up to 2.5A and generates fixed output voltages of

3.3V/5V, along with the ability to program the output

voltage between 1V to 10V.

Total Cost

• Integrated High-Side and Low-Side Switch Enables

Synchronous Operation for High Efﬁciency and

Reduced Cost

• All-Ceramic Capacitor Solution Allows Ultra-

Compact Solution Size

• 220kHz to 2.2MHz Adjustable Frequency with

External Synchronization

The MAX17244 uses a current-mode control architecture.

The device can operate in the pulse-width modulation

(PWM) or pulse-frequency modulation (PFM) control

schemes. PWM operation provides constant frequency

operation at all loads, and is useful in applications sensitive

to switching frequency. PFM operation disables negative

inductor current and additionally skips pulses at light

loads for high efficiency. Under light-load applications,

the external sync pin FSYNC logic input allows the

device to operate either in PFM mode for reduced current

consumption or fixed-frequency FPWM (forced-PWM)

mode to eliminate frequency variation to minimize EMI.

Fixed-frequency FPWM mode is extremely useful for

power supplies designed for RF transceivers where tight

emission control is necessary.

• Power Good Output and High-Voltage EN Input

Simplify Power Sequencing

● Increases Design Flexibility

• 180° Out-of-Phase Clock Output at SYNCOUT

Enables Cascaded Power Supplies for Increased

Power Output

• Fixed Output Voltage with ±2% Accuracy (5V/3.3V)

or Externally Resistor Adjustable (1V to 10V)

● Reduces Power Dissipation

• >90% Peak Efﬁciency

• PWM and PFM Operation Optimizes Conversion

Efﬁciency From Heavy to Light Loads

• Automatic LX Slew-Rate Adjustment for Optimum

Efﬁciency Across Operating Frequency Range

• Low 5μA (typ.) Shutdown Current

• Low 28μA (typ.) Quiescent Current

This device is available in a compact 16-pin (5mm x 5mm)

TQFN package with exposed pad and 16-pin TSSOP.

-40°C to +85°C operation.

● Operates Reliably

• 42V Input Voltage Transient Protection

• Fixed 8ms Internal Software Start Reduces Input

Inrush Current

• Cycle-by-Cycle Current Limit, Thermal Shutdown

with Automatic Recovery

Applications

● Distributed Supply Regulation

● Wall Transformer Regulation

● General-Purpose Point-of-Load

• Reduced EMI Emission with Spread-Spectrum

Control

Ordering Information and Typical Application Circuit

appears at end of data sheet.

19-8526; Rev 1; 3/17

12 3 4 5 6 7...18

中文翻译

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与MAX17244相关器件

型号	品牌	获取价格	描述	数据表
MAX17244ETERA+	MAXIM	获取价格	Eliminates External Components and Reduces
MAX17244ETERB+	MAXIM	获取价格	Eliminates External Components and Reduces
MAX17244ETESA+	MAXIM	获取价格	Eliminates External Components and Reduces
MAX17244ETESA+T	MAXIM	获取价格	Switching Regulator, TQFN-16
MAX17244ETESB+	MAXIM	获取价格	Eliminates External Components and Reduces
MAX17245	MAXIM	获取价格	Eliminates External Components and Reduces
MAX17245	ADI	获取价格	3.5V至36V、3.5A、同步Buck转换器，28μA静态电流和低EMI
MAX17245ETERA+	MAXIM	获取价格	Eliminates External Components and Reduces
MAX17245ETERA+T	MAXIM	获取价格	Switching Regulator,
MAX17245ETERB+	MAXIM	获取价格	Eliminates External Components and Reduces

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