Datasheet > MAX5098A

MAX5098A

更新时间： 2024-11-26 11:48:55

品牌	Logo	应用领域
美信 - MAXIM		转换器
页数	文件大小	规格书
28页	488K
描述
Dual, 2.2MHz, Automotive Buck or Boost Converter with 80V Load-Dump Protection

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MAX5098A 数据手册

19-4111; Rev 0; 5/08

Dual, 2.2MHz, Automotive Buck or Boost

Converter with 80V Load-Dump Protection

MX5098A

General Description

Features

The MAX5098A is a dual-output, high-switching-frequen-

cy DC-DC converter with integrated n-channel switches

that can be used either in high-side or low-side configura-

tion. Each output can be configured either as a buck con-

verter or a boost converter. In the buck configuration, this

device delivers up to 2A from converter 1 and 1A from

converter 2. The MAX5098A also integrates a load-dump

protection circuitry that is capable of handling load-dump

transients up to 80V for automotive applications. The

load-dump protection circuit utilizes an internal charge-

pump to drive the gate of an external n-channel MOSFET.

When an overvoltage or load-dump condition occurs, the

series protection MOSFET absorbs the high voltage tran-

sient to prevent damage to lower voltage components.

o Wide 4.5V to 5.5V or 5.2V to 19V Input Voltage

Range (with Up to 80V Load-Dump Protection)

o Dual-Output DC-DC Converter with Integrated

Power MOSFETs

o Each Output Configurable in Buck or Boost Mode

o Adjustable Outputs from 0.8V to 0.85V Buck

Configuration) and from V to 28V (Boost

Configuration)

o I

and I

of 2A and 1A (Respectively) in

OUT2

OUT1

Buck Configuration

o Switching Frequency Programmable from 200kHz

The DC-DC converters operate over a wide operating

voltage range from 4.5V to 19V. The MAX5098A oper-

ates 180° out-of-phase with an adjustable switching fre-

quency to minimize external components while allowing

the ability to make trade-offs between the size, efficiency,

and cost. The high switching frequency (up to 2.2MHz)

also allows this device to operate outside the AM band

for automotive applications.

to 2.2MHz

o Synchronization Input (SYNC)

o Clock Output (CKO) for Four-Phase Master-Slave

Operation

o Individual Converter Enable Input and Power-

Good Output

This device utilizes voltage-mode control for stable oper-

ation and external compensation, thus the loop gain is

tailored to optimize component selection and transient

response. This device can be synchronized to an exter-

nal clock fed at the SYNC input. Also, a clock output

(CKO) allows a master-slave connection of two devices

with a four-phase synchronized switching sequence.

Additional features include internal digital soft-start, indi-

vidual enable for each DC-DC regulator (EN1 and EN2),

open-drain power-good outputs (PGOOD1 and

PGOOD2), and a shutdown input (ON/OFF).

o Low-I (7µA) Standby Current (ON/OFF)

o Internal Digital Soft-Start and Soft-Stop

o Short-Circuit Protection on Outputs and

Maximum Duty-Cycle Limit

o Overvoltage Protection on Outputs with Auto

Restart

o Thermal Shutdown

o Thermally Enhanced 32-Pin TQFN Package

Other features of the MAX5098A include overvoltage pro-

tection, short-circuit (hiccup current limit) and thermal

protection. The MAX5098A is available in a thermally

enhanced, exposed pad, 5mm x 5mm, 32-pin TQFN

package and is fully specified over the automotive

-40°C to +125°C temperature range.

Dissipates up to 2.7W at +70°C

Ordering Information

PART

TEMP RANGE

PIN-PACKAGE

Applications

Automotive AM/FM Radio Power Supply

MAX5098AATJ+

-40°C to +125°C

32 TQFN-EP*

+Denotes a lead-free package.

*EP = Exposed pad.

Automotive Instrument Cluster Display

Pin Configuration appears at end of data sheet

________________________________________________________________ Maxim Integrated Products

For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,

or visit Maxim’s website at www.maxim-ic.com.

12 3 4 5 6 7...28

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与MAX5098A相关器件

型号	品牌	获取价格	描述	数据表
MAX5098AATJ	MAXIM	获取价格	Dual, 2.2MHz, Automotive Buck or Boost Converter with 80V Load-Dump Protection
MAX5098AATJ+	MAXIM	获取价格	Dual Switching Controller, Voltage-mode, 4.3A, 2200kHz Switching Freq-Max, BICMOS, 5 X 5 M
MAX5099	MAXIM	获取价格	Dual, 2.2MHz, Automotive Synchronous Buck Converter with 80V Load-Dump Protection
MAX5099	ADI	获取价格	双通道、2.2MHz、汽车同步整流buck转换器，具有80V抛负载保护
MAX5099ATJ	MAXIM	获取价格	Dual, 2.2MHz, Automotive Synchronous Buck Converter with 80V Load-Dump Protection
MAX5099ATJ+	MAXIM	获取价格	Dual Switching Controller, Voltage-mode, 5A, 2200kHz Switching Freq-Max, BICMOS, 5 X 5 MM,
MAX509ACAP	MAXIM	获取价格	Quad, Serial 8-Bit DACs with Rail-to-Rail Outputs
MAX509ACAP+	MAXIM	获取价格	D/A Converter, 4 Func, Serial Input Loading, 6us Settling Time, PDSO20, SSOP-20
MAX509ACAP+T	MAXIM	获取价格	D/A Converter, 4 Func, Serial Input Loading, 6us Settling Time, PDSO20, SSOP-20
MAX509ACPP	MAXIM	获取价格	Quad, Serial 8-Bit DACs with Rail-to-Rail Outputs

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