ST2S08BPQR datasheet(1/18 Pages) STMICROELECTRONICS

Il numero della parte	ST2S08BPQR

Spiegazioni elettronici	Dual synchronous rectification, 1.5 A, 1.5 MHz adjustable step-down switching regulator

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Produttore elettronici	STMICROELECTRONICS [STMicroelectronics]

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1 / 18 page

This is information on a product in full production.

May 2012

Doc ID 18290 Rev 2

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18

ST2S08B

Dual synchronous rectification, 1.5 A, 1.5 MHz

adjustable step-down switching regulator

Datasheet

− production data

Features

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

DC converter

■ Adjustable output voltage from 0.8 V

■ 2 % DC output voltage tolerance

■ Synchronous rectification

■ Integrated current limit

■ Inhibit function

■ Soft-start for start delay of 800 µs typ.

■ Typical efficiency: > 80 % at VOUT = 1.2 V

■ 1.5 A output current capability

■ Non-switching quiescent current: max 1.5 mA

over temperature range

■ RDS(ON) 150 mΩ (typ.)

■ Uses tiny capacitors and inductors

■ Available in QFN12L (4 x 4 mm)

Description

The ST2S08B is a dual step-down DC-DC

converter optimized for powering low-voltage

digital cores in ODD applications and, generally,

to replace the high current linear solution when

the power dissipation may cause a 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. A

high switching frequency of 1.5 MHz allows the

use of tiny surface-mounted components as well

as a resistor divider to set the output voltage

value. Only an inductor and two capacitors are

required. A low output ripple is guaranteed by the

current mode PWM topology and the utilization of

low ESR SMD ceramic capacitors. The device is

thermally protected and current limited. The

ST2S08B is available in the QFN12L (4 x 4 mm)

package.

QFN12L (4 x 4 mm)

Table 1.

Device summary

Order code

Package

Packaging

ST2S08BPQR

QFN12L (4 x 4 mm)

Tape and reel

www.st.com

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