Datasheet > MAX38888

MAX38888

更新时间： 2023-12-20 18:46:16

品牌	Logo	应用领域
亚德诺 - ADI		稳压器
页数	文件大小	规格书
16页	589K
描述
用于备用电源应用的2.5V-5.0V，0.5A / 2.5A可逆降压/升压稳压器

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MAX38888 数据手册

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MAX38888

2.5V to 5.0V, 0.5A/2.5A Reversible Buck/Boost

Regulator for Backup Power Applications

General Description

Benefits and Features

The MAX38888 is a storage capacitor or capacitor bank

backup regulator designed to efficiently transfer power be-

tween a storage element and a system supply rail in re-

versible buck and boost operations using the same induc-

tor.

● 2.5V to 5V System Output Voltage

● 0.8V to 4.5V Cap Voltage Range

● Up to 2.5A Peak Inductor Discharge Current

● Programmable Voltage and Current Thresholds

● ±2% Threshold Accuracy

● Up to 95% Efficiency, Charge or Discharge

● 2.5μA Ready Quiescent Current

● Small Solution Size

When the main supply is present and above the minimum

system supply voltage, the regulator operates in buck

mode and charges the storage element at up to 500mA

peak inductor current. Once the storage element is

charged, the circuit draws only 2.5µA of current while it

maintains the supercapacitor or other storage element in

its ready state. When the main supply is removed, the reg-

ulator operates in boost mode and prevents the system

from dropping below the minimum operating voltage, dis-

charging the storage element at up to 2.5A peak inductor

current.

• 3mm x 3mm x 0.75mm TDFN Package

Ordering Information appears at end of data sheet.

The MAX38888 is externally programmable for minimum

and maximum voltage of the storage element, such as

supercapacitor, minimum system voltage, and maximum

charge and discharge currents. The internal DC-DC con-

verter requires only a 1µH inductor.

Applications

● Handheld Industrial Equipment

● Portable Computers

● Portable Devices with a Removable Battery

19-100369; Rev 5; 8/20

12 3 4 5 6 7...16

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