Datasheet > ST1S03A_08

ST1S03A_08

更新时间： 2024-11-23 03:29:55

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
14页	277K
描述
1.5 A, 1.5 MHz adjustable, with inhibit function step-down switching regulator

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ST1S03A_08 数据手册

ST1S03A

1.5 A, 1.5 MHz adjustable, with inhibit function

step-down switching regulator

Features

■ Step-down current mode PWM (1.5 MHz) DC-

DC converter

■ 2 % DC output voltage tolerance

■ Internal soft start for start-up current limitation

and power on delay of 50-100 µs

■ Typical efficiency: > 85 %

■ Inhibit function

DFN6D (3x3 mm)

■ 1.5 A output current capability

■ Not switching quiescent current: max 1.5 mA

over temperature range

■ Switch V : max 200 mV @ I

= 750 mA

■ Uses tiny capacitors and inductors

■ Available in DFN6D 3x3 exposed pad

Description

The ST1S03A is a step down DC-DC converter

optimized for powering low-voltage digital core in

HDD applications and, generally, to replace the

high current linear solution when the power

dissipation may cause an high heating of the

application environment. It provides up to 1.5 A

over an input voltage range of 3 V to 5.5 V. An high

switching frequency (1.5 MHz) allows the use of

tiny surface-mount components: as well as the

resistor divider to set the output voltage value,

only an inductor, a schottky diode and two

capacitors are required. Besides, a low output

ripple is guaranteed by the current mode PWM

topology and by the use of low ESR SMD ceramic

capacitors. The device is thermal protected and

current limited to prevent damages due to

accidental short circuit. The ST1S03A is available

in DFN6D (3x3 mm).

Table 1.

Device summary

Order codes

Packaging

Package

ST1S03APUR

ST1S03AIPUR

Tape and reel

DFN6D (3x3 mm)

June 2008

Rev 6

1/14

www.st.com

12 3 4 5 6 7...14

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与ST1S03A_08相关器件

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ST1S03AIPUR	STMICROELECTRONICS	获取价格	1.5A, 1.5 MHz Adjustable, with inhibit function Step-down switching regulator in DFN6 3x3
ST1S03APM	STMICROELECTRONICS	获取价格	2.5A SWITCHING REGULATOR, 1800kHz SWITCHING FREQ-MAX, DSO6, 3 X 3 MM, LEAD FREE, DFN-6
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ST1S03APUR	STMICROELECTRONICS	获取价格	1.5A, 1.5 MHz Adjustable, with inhibit function Step-down switching regulator in DFN6 3x3
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ST1S03PMR	STMICROELECTRONICS	获取价格	暂无描述
ST1S03PU	STMICROELECTRONICS	获取价格	1.5A, 1.5 MHz adjustable, step-down switching regulator in DFN6