ST1S12XX datasheet(1/20 Pages) STMICROELECTRONICS

номер детали	ST1S12XX

подробное описание детали	Synchronous rectification with enable, 0.7 A, 1.7 MHz fixed or adjustable step-down switching regulator in TSOT23-5L

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производитель	STMICROELECTRONICS [STMicroelectronics]

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February 2008

Rev 2

1/20

20

ST1S12xx

Synchronous rectification with enable, 0.7 A, 1.7 MHz fixed or

adjustable step-down switching regulator in TSOT23-5L

Features

■ Step-down current mode PWM (1.7 MHz) DC-

DC converter

■ 3% DC output voltage tolerance

■ Synchronous rectification

■ Fixed output voltage 1.2 V, 1.8 V, and ADJ

(available on request 1.5 V, 2.5 V and 3.3 V)

■ Enable function

■ Internal soft start

■ Typical efficiency: > 90%

■ 0.7 A output current capability

■ Not switching quiescent current: max 600 µA

over temperature range

■ RDSON typ. 250 mΩ and 400 mΩ

■ Uses tiny capacitors and inductors

■ Operative junction temp. -40°C to 125°C

■ Available in TSOT23-5L package

Description

The ST1S12Gxx is a step down DC-DC converter

optimized for powering low-voltage digital cores in

HDD applications and, generally, to replace the

high current linear solution when the power

dissipation may cause high heating of the

application environment. It provides up to 0.7 A

over an input voltage range of 2.5 V to 5.5 V. A

high switching frequency (1.7 MHz) allows the

use of tiny surface-mount components. In addition

to the resistor divider to set the output voltage

value, only an inductor and two capacitors are

required. Moreover, 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 thermally protected and

the current is limited to prevent damage due to

accidental short-circuit. The ST1S12Gxx is

available in the TSOT23-5L package.

TSOT23-5L

Table 1.

Device summary

Part numbers

Order codes

Package

ST1S12XX

ST1S12GR

TSOT23-5L

ST1S12XX12

ST1S12G12R

TSOT23-5L

ST1S12XX18

ST1S12G18R (1)

TSOT23-5L

1.

Available on request.

www.st.com

Аналогичный номер детали - ST1S12XX

производитель	номер детали	датащи	подробное описание детали
STMicroelectronics	ST1S12XX	318Kb / 20P	Synchronous rectification with enable, 0.7 A, 1.7 MHz fixed or adjustable step-down switching regulator in TSOT23-5L
	ST1S12XX12	318Kb / 20P	Synchronous rectification with enable, 0.7 A, 1.7 MHz fixed or adjustable step-down switching regulator in TSOT23-5L
	ST1S12XX18	318Kb / 20P	Synchronous rectification with enable, 0.7 A, 1.7 MHz fixed or adjustable step-down switching regulator in TSOT23-5L
	ST1S12XX	318Kb / 20P	Synchronous rectification with enable, 0.7 A, 1.7 MHz fixed or adjustable step-down switching regulator in TSOT23-5L

More results

Аналогичное описание - ST1S12XX

производитель	номер детали	датащи	подробное описание детали
STMicroelectronics	ST1S12XX	318Kb / 20P	Synchronous rectification with enable, 0.7 A, 1.7 MHz fixed or adjustable step-down switching regulator in TSOT23-5L
	ST1S06XX	426Kb / 20P	Synchronous rectification with inhibit, 1.5 A, 1.5 MHz fixed or adjustable, step-down switching regulator
	ST1S06	502Kb / 19P	Synchronous rectification with inhibit, 1.5A, 1.5 MHz fixed or adjustable, step-down switching regulator in DFN6 3x3
	ST2S06A33	296Kb / 18P	Dual synchronous rectification with reset or inhibit, 0.5 A, 1.5 MHz adjustable step-down switching regulator
	ST2S06A33	333Kb / 21P	Dual synchronous rectification with reset or inhibit, 0.5 A, 1.5 MHz adjustable step-down switching regulator
	ST2S08B	757Kb / 18P	Dual synchronous rectification, 1.5 A, 1.5 MHz adjustable 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
	L5988	114Kb / 10P	4A step-down switching regulator with synchronous rectification
	L5980	1Mb / 37P	0.7 A step-down switching regulator

More results

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