Datasheet > MAX77231

MAX77231

更新时间： 2023-12-20 18:46:23

品牌	Logo	应用领域
亚德诺 - ADI		调节器
页数	文件大小	规格书
10页	909K
描述
2.75V至4.8V输入、10mA输出、35μVRMS 超低噪声和纹波升压调节器

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中文翻译

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数据手册

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MAX77231 数据手册

EVALUATION KIT AVAILABLE

MAX77231

2.75V to 4.8V Input, 10mA Output, 35µV

RMS

Ultra-Low Noise Boost Regulator

General Description

The MAX77231 is optimized for boost applications, requiring

Beneﬁts and Features

● Ultra-Small Solution Size (< 7mm )

very low ripple/noise and small PCB space. Output ripple

● 35µV

(typ) Output Ripple/Noise

RMS

and noise are suppressed to 35µV

(in 1MHz BW) by

RMS

● 11.2V/10mA Output

a PMOS linear post-regulator set 0.5V below the boost

regulator output to reject noise while optimizing efficiency.

● Output Factory Trimmable from 11.2V to 16.2V

● 125µA No Load Supply Current Output on < 1µA

The boost regulator operates using a 1µH/400mA inductor

and 2.2µF (0.22 (min) after derating) output capacitance. Fast

transient response and stable operation are guaranteed using

a current-limited PFM architecture.

Shutdown Supply Current

● True Shutdown Load Disconnect

● Selectable Active Discharge

A PMOS low-noise linear post-regulator attenuates boost

converter ripple by ~50dB (10MHz BW) before delivering

11.2V to the load. Other output voltages up to 16.2V can

be factory set. The LDO also disconnects the load from

the boost during shutdown, allowing the output to fall to

0V (true shutdown). Active discharge can also be activated.

● 9-Bump, 1.238mm x 1.238mm x 0.35mm WLP

Applications

● Low-Noise Bias Supply

● Sensor Bias Supply

The MAX77231 is packaged in a 9-bump wafer-level

package (WLP), providing a compact layout when combined

with the inductor and external capacitors. Total solution

Ordering Information appears at end of data sheet.

size is less than 7mm .

Typical Operating Circuit

2.2µF 25V

OUTPUT

11.2V

ENM

OUT

OFF

10mA

MAX77231

ENS

INPUT

2.7 TO

4.8V

BSTP

BST

L1 1µH

400mA

2.2µF

25V

2.2uF

6.3V

PGND

GND

19-6658; Rev 2; 5/16

12 3 4 5 6 7...10

中文翻译

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