ST1S03_08 datasheet(1/16 Pages) STMICROELECTRONICS

tên linh kiện	ST1S03

Giải thích chi tiết về linh kiện	1.5 A, 1.5 MHz adjustable, step-down switching regulator

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March 2008

Rev 6

1/16

16

ST1S03

1.5 A, 1.5 MHz adjustable,

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: > 70 % over all operating

conditions

■ 1.5 A output current capability

■ Not switching quiescent current: max 2.5 mA

over temperature range

■ Switch VDS: max 350 mV @ ISW = 750 mA

■ Uses tiny capacitors and inductors

■ Available in DFN 3x3 mm exposed pad

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 1.5 A

over an input voltage range of 3 V to 16 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 ST1S03 is available

in DFN6.

DFN6D (3x3mm)

Table 1.

Device summary

Order code

Packaging

Package

ST1S03PU

ST1S03PUR

DFN6D (3x3 mm)

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Số phần tương tự - ST1S03_08

nhà sản xuất	tên linh kiện	bảng dữ liệu	Giải thích chi tiết về linh kiện
STMicroelectronics	ST1S03	342Kb / 17P	1.5A, 1.5 MHz adjustable, step-down switching regulator in DFN6

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Mô tả tương tự - ST1S03_08

nhà sản xuất	tên linh kiện	bảng dữ liệu	Giải thích chi tiết về linh kiện
STMicroelectronics	ST1S03A	276Kb / 14P	1.5 A, 1.5 MHz adjustable, with inhibit function step-down switching regulator
	ST2S08B	757Kb / 18P	Dual synchronous rectification, 1.5 A, 1.5 MHz adjustable step-down switching regulator
	L5983	966Kb / 37P	1.5 A step-down switching regulator
	ST1S06XX	426Kb / 20P	Synchronous rectification with inhibit, 1.5 A, 1.5 MHz fixed or adjustable, step-down switching regulator
	ST1S03	538Kb / 11P	1.5A, 1.5 MHZ ADJUSTABLE, STEP-DOWN SWITCHING REGULATOR IN DFN6
	ST1S03	342Kb / 17P	1.5A, 1.5 MHz adjustable, step-down switching regulator in DFN6
	ST1S03PMR	346Kb / 17P	1.5A, 1.5 MHz adjustable, step-down switching regulator in DFN6
	A6986F	6Mb / 72P	38 V 1.5 A synchronous step-down switching regulator
	ST1S09	387Kb / 18P	2 A, 1.5 MHz PWM step-down switching regulator with synchronous rectification
	ST1S30	193Kb / 11P	3 A, 1.5 MHz PWM step-down switching regulator with synchronous rectification

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