ST1S03

更新时间： 2024-11-22 21:55:39

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
11页	542K
描述
1.5A, 1.5 MHZ ADJUSTABLE, STEP-DOWN SWITCHING REGULATOR IN DFN6

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ST1S03 数据手册

ST1S03

1.5A, 1.5 MHZ ADJUSTABLE,

STEP-DOWN SWITCHING REGULATOR IN DFN6

STEP-DOWN CURRENT MODE PWM

(1.5MHz) DC-DC CONVERTER

2% DC OUTPUT VOLTAGE TOLERANCE

INTERNAL SOFT START FOR START-UP

CURRENT LIMITIATION AND POWER ON

DELAY OF 50-100µs

TYPICAL EFFICIENCY: > 70% OVER ALL

OPERATING CONDITIONS

DFN6 (3x3)

1.5A OUTPUT CURRENT CAPABILITY

NOT SWITCHING QUIESCENT CURRENT:

MAX 2.5mA OVER TEMPERATURE RANGE

SWITCH V : MAX 350mV @ISW=750mA

USES TINY CAPACITORS AND INDUCTORS

AVAILABLE IN DFN 3x3 EXPOSED PAD

switching frequency (1.5MHz) 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 E.S.R. SMD

ceramic capacitors. The device is thermal

protected and current limited to prevent damages

due to accidental short circuit. The ST1S03 is

available in DFN6 package.

DESCRIPTION

The ST1S03 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 1.5A

over an input voltage range of 3V to 16V. An high

Figure 1: Schematic Diagram

Rev. 3

1/11

March 2005

12 3 4 5 6 7...11

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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