Datasheet > MAX15021ATI/V

MAX15021ATI/V

更新时间： 2024-11-15 01:19:35

品牌	Logo	应用领域
美信 - MAXIM		/
页数	文件大小	规格书
24页	338K
描述
Dual, 4A/2A, 4MHz, Step-Down DC-DC Regulator

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MAX15021ATI/V 数据手册

MAX15021

Dual, 4A/2A, 4MHz, Step-Down DC-DC

Regulator with Tracking/Sequencing Capability

General Description

Features

The MAX15021 is a dual-output, pulse-width-modulated

(PWM), step-down DC-DC regulator with tracking (coin-

cident and ratiometric) and sequencing options. The

device operates from 2.5V to 5.5V and each output can

♦ 2.5V to 5.5V Input-Voltage Range

♦ Dual-Output Synchronous Buck Regulators

♦ Integrated Switches for 4A and 2A Output

Currents

be adjusted from 0.6V to the input supply (V

). The

AVIN

MAX15021 delivers up to 4A (regulator 1) and 2A (reg-

ulator 2) of output current. This device offers the ability

to adjust the switching frequency from 500kHz to 4MHz

and provides the capability of optimizing the design in

terms of size and performance.

♦ 180° Out-Of-Phase Operation

♦ Output Voltage Adjustable from 0.6V to V

AVIN

♦ Lossless, Cycle-by-Cycle Current Sensing

♦ External Compensation for Maximum Flexibility

The MAX15021 utilizes a voltage-mode control scheme

with external compensation to provide good noise

immunity and maximum flexibility in selecting inductor

values and capacitor types. The dual switching regula-

tors operate 180° out-of-phase, thereby reducing the

RMS input ripple current and thus the size of the input

bypass capacitor significantly.

♦ Digital Soft-Start and Soft-Stop for Tracking

Applications

♦ Digital Soft-Start into a Prebiased Load for

Sequencing Applications

♦ Sequencing or Coincident/Ratiometric Tracking

♦ Programmable Switching Frequency from 500kHz

to 4MHz

The MAX15021 offers the ability to track (coincident or

ratiometric) or sequence during power-up and power-

down operation. When sequencing, it powers up glitch-

free into a prebiased output.

♦ Thermal Shutdown and Hiccup-Mode Short-

Circuit Protection

♦ 20µA Shutdown Current

Additional features include an internal undervoltage

lockout with hysteresis and a digital soft-start/soft-stop

for glitch-free power-up and power-down. Protection

features include lossless cycle-by-cycle current limit,

hiccup-mode output short-circuit protection, and ther-

mal shutdown.

♦ 100% Maximum Duty Cycle

♦ Space-Saving (5mm x 5mm) 28-Pin TQFN

Package

Pin Configuration

The MAX15021 is available in a space-saving, 5mm x

5mm, 28-pin TQFN-EP package and is specified for

operation from -40°C to +125°C temperature range.

TOP VIEW

21 20 19 18 17 16 15

Applications

N.C. 22

N.C.

RFID Reader Cards

COMP2 23

Power-over-Ethernet (PoE) IP Phones

Automotive Multimedia

Multivoltage Supplies

12 COMP1

FB2

EN2

MAX15021

FB1

SGND

AVIN

EN1

Networking/Telecom

DVDD1

PGND1

*EP

Ordering Information

PART

TEMP RANGE

PIN-PACKAGE

MAX15021ATI/V+

-40°C to +125°C

28 TQFN-EP*

+Denotes a lead-free package.

*EP = Exposed pad.

/V denotes an automotive qualified part.

*EP = EXPOSED PAD.

For pricing, delivery, and ordering information, please contact Maxim Direct

at 1-888-629-4642, or visit Maxim’s website at www.maximintegrated.com.

19-4106; Rev 1; 8/12

12 3 4 5 6 7...24

中文翻译

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与MAX15021ATI/V相关器件

型号	品牌	获取价格	描述	数据表
MAX15021ATI+T	MAXIM	获取价格	Switching Regulator/Controller, Voltage-mode, 4A, 4000kHz Switching Freq-Max, BICMOS, PQCC
MAX15022	MAXIM	获取价格	Dual, 4A/2A, 4MHz, Step-Down DC-DC Regulator with Dual LDO Controllers
MAX15022	ADI	获取价格	双路、4A/2A、4MHz、降压型DC-DC调节器，提供双LDO控制器
MAX15022_11	MAXIM	获取价格	Dual, 4A/2A, 4MHz, Step-Down DC-DC Regulator with Dual LDO Controllers
MAX15022ATI	MAXIM	获取价格	Dual, 4A/2A, 4MHz, Step-Down DC-DC Regulator with Dual LDO Controllers
MAX15022ATI/V+	MAXIM	获取价格	Dual, 4A/2A, 4MHz, Step-Down DC-DC Regulator with Dual LDO Controllers
MAX15022ATI+	MAXIM	获取价格	Dual, 4A/2A, 4MHz, Step-Down DC-DC Regulator with Dual LDO Controllers
MAX15022ATI+T	MAXIM	获取价格	Dual Switching Controller, Voltage-mode, 6A, 4000kHz Switching Freq-Max, BICMOS, TQFN-28
MAX15022EVKIT	MAXIM	获取价格	Independent Enable Inputs for All Outputs
MAX15022EVKIT+	MAXIM	获取价格	Independent Enable Inputs for All Outputs

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