Datasheet > MAX5099

MAX5099

更新时间： 2024-11-04 14:57:39

品牌	Logo	应用领域
亚德诺 - ADI		转换器
页数	文件大小	规格书
27页	635K
描述
双通道、2.2MHz、汽车同步整流buck转换器，具有80V抛负载保护

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数据手册

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MAX5099 数据手册

19-4112; Rev 0; 5/08

Dual, 2.2MHz, Automotive Synchronous Buck

Converter with 80V Load-Dump Protection

MAX509

General Description

Features

The MAX5099 offers a dual-output, high-switching-fre-

quency DC-DC buck converter with an integrated high-

side switch. The MAX5099 integrates two low-side

MOSFET drivers to allow each converter to drive an

external synchronous-rectifier MOSFET. Converter 1

delivers up to 2A output current, and converter 2 can

deliver up to 1A of output current. The MAX5099 inte-

grates 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 transient to prevent damage

to lower voltage components.

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

Range with 80V Load-Dump Protection

♦ Dual-Output DC-DC Converter with Integrated

Power MOSFETs

♦ Adjustable Outputs from 0.8V to 0.9V

♦ Output Current Capability Up to 2A and 1A

♦ Switching Frequency Programmable from 200kHz

to 2.2MHz

♦ Synchronization Input (SYNC)

♦ Individual Converter Enable Input and Power-

The DC-DC converter operates over a wide 4.5V to 19V

operating voltage range. The MAX5099 operates 180°

out-of-phase with an adjustable switching frequency to

minimize external components while allowing the ability

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

cost. The high switching frequency also allows these

devices to operate outside the AM band for automotive

applications. These regulators can be protected

against high voltage transients such as a load-dump

condition by using the integrated overvoltage controller.

Good Output

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

♦ Internal Digital Soft-Start and Soft-Stop

♦ Short-Circuit Protection on Outputs and

Maximum Duty-Cycle Limit

♦ Overvoltage Protection on Outputs with Auto

Restart

This device utilizes voltage-mode control for stable

operation and external compensation, so that the loop

gain is tailored to optimize component selection and

transient response. The MAX5099 has a maximum duty

cycle of 92.5% and is synchronized to an external clock

fed at the SYNC input.

♦ Thermal Shutdown

♦ Thermally Enhanced 32-Pin TQFN Package

Dissipates Up to 2.7W at +70°C

Additional features include internal digital soft-start,

individual enable for each DC-DC regulator (EN1 and

EN2), open-drain power-good outputs (PGOOD1 and

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

Ordering Information

PART

TEMP RANGE

PIN-PACKAGE

-40°C to +125°C

Other features of the MAX5099 include overvoltage pro-

tection and short-circuit (hiccup current limit) and ther-

mal protection. The MAX5099 is available in a thermally

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

package and operates over the automotive -40°C to

+125°C temperature range.

MAX5099ATJ+

32 TQFN-EP*

+Denotes a lead-free package.

*EP = Exposed pad.

Applications

Automotive AM/FM Radio Power Supply

Pin Configuration appears at end of data sheet.

Automotive Instrument Cluster Display

________________________________________________________________ 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.

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与MAX5099相关器件

型号	品牌	获取价格	描述	数据表
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
MAX509ACPP+	MAXIM	获取价格	暂无描述
MAX509ACWP	MAXIM	获取价格	Quad, Serial 8-Bit DACs with Rail-to-Rail Outputs
MAX509ACWP+	MAXIM	获取价格	D/A Converter, 4 Func, Serial Input Loading, 6us Settling Time, PDSO20, SOP-20
MAX509ACWP-T	MAXIM	获取价格	D/A Converter, 4 Func, Serial Input Loading, 6us Settling Time, PDSO20, SOP-20

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