Datasheet > EVAL5985

EVAL5985

更新时间： 2024-09-22 12:50:55

品牌	Logo	应用领域
意法半导体 - STMICROELECTRONICS		稳压器开关
页数	文件大小	规格书
6页	190K
描述
2 A step-down switching regulator demonstration board based on the L5985

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EVAL5985 数据手册

EVAL5985

2 A step-down switching regulator demonstration board

based on the L5985

Data Brief

Features

■ 2 A DC output current

■ 2.9 V to 18 V input voltage

■ Output voltage adjustable from 0.6 V to 16 V

■ 250 kHz switching frequency, programmable

up to 1 MHz

■ Internal soft-start and inhibit

■ Low dropout operation: 100 % duty cycle

■ Zero-load current operation

■ Over-current and thermal protection

■ VFQFPN8 3 mm x 3 mm package

EVAL5985

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Description

The compensation network on the demonstration

board allows the use of MLCC as output filter to

keep the loop stable. The inductor saturation

current and forward current of the Schottky diode

are within the current limit values.

The EVAL5985 demonstration board provides the

design engineer with a fully functional step-down

switching regulator with an output current of up to

2 A. The board integrates STMicroelectronics’

L5985 step-down switching regulator, together

with all the external components required for a

typical application.

The switching frequency on the demonstration

board is set to 500 kHz by means of the R5

resistor connected to pin Fsw.

The rated voltage of the input capacitor and the

Schottky diode rectifier repetitive peak reverse

voltage are both 25 V, making the board capable

of covering the entire 2.9 V - 18 V input voltage

range of the L5985 device.

The board features an external resistor divider

(R1 and R2) designed for an output voltage

of 3.3 V.

The output voltage can be set to a level from 0.6 V

up to the rated voltage of the output capacitor

(16 V).

January 2009

Rev 1

1/4

For further information contact your local STMicroelectronics sales office.

www.st.com

12 3 4 5 6

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