Datasheet > MPQ4561-AEC1

MPQ4561-AEC1

更新时间： 2024-04-09 19:02:12

品牌	Logo	应用领域
芯源 - MPS		/
页数	文件大小	规格书
20页	960K
描述
1.5A, 2MHz, 55V 降压变换器

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MPQ4561-AEC1 数据手册

MPQ4561 – 1.5A, 2MHz, 55V STEP-DOWN CONVERTER

PIN FUNCTIONS

QFN

Name

Pin #

Description

Switch Node. Output of the high-side switch. Requires a low V_FSchottky rectifier to

ground. Place the rectifier close to the SW pins to reduce switching spikes..

1, 2

Enable Input. Pull this pin below the specified threshold to shut the chip down. Pull it

above the specified threshold or leaving it floating to enable the chip.

Compensation. GM error amplifier output. Apply control-loop frequency compensation to

this pin.

COMP

Feedback. This is the input to the error amplifier. Connect an external resistive divider

connected between the output and GND. Compare to the internal +0.8V reference to set

the regulation voltage.

Ground. Connect as close as possible to the output capacitor and avoid high-current

switching paths. Connect the exposed pad to GND plane for optimal thermal

performance.

GND,

Exposed Pad

Switching Frequency Program Input. Connect a resistor from this pin to ground to set the

switching frequency.

FREQ

Soft start programming mode. Connect a capacitor between SS and GND to set the soft

start time.

Input Supply. Supplies power to all the internal control circuitry, both BS regulators, and

the high-side switch. Place a decoupling capacitor to ground close to this pin to minimize

switching spikes.

VIN

Bootstrap. This is the positive power supply for the internal floating high-side MOSFET

driver. Connect a bypass capacitor between this pin and the SW pin.

BST

MPQ4561 Rev. 1.12

5/24/2016

www.MonolithicPower.com

MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.

1 2 345 6 7...20

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