ST1S12XX12 datasheet, PDF - EEWORLD Datasheet

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ST1S12XX12: DescriptionSWITCHING REGULATOR, 2080 kHz SWITCHING FREQ-MAX, PDSO5; Categorysemiconductor Analog mixed-signal IC; File Size278KB，20 Pages; ManufacturerSTMicroelectronics; Websitehttp://www.st.com/

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ST1S12XX12 Overview

SWITCHING REGULATOR, 2080 kHz SWITCHING FREQ-MAX, PDSO5

ST1S12XX12 Parametric

Parameter Name	Attribute value
Number of functions	1
Number of terminals	5
Rated input voltage	3.6 V
Maximum limit input voltage	5.5 V
Minimum limit input voltage	2.5 V
Maximum operating temperature	125 Cel
Minimum operating temperature	-40 Cel
Processing package description	LEAD FREE, TSOT-23, 5 PIN
state	ACTIVE
Craftsmanship	NMOS
packaging shape	Rectangle
Package Size	SMALL OUTLINE, THIN PROFILE, SHRINK PITCH
surface mount	Yes
Terminal form	GULL WING
Terminal spacing	0.9500 mm
Terminal location	pair
Packaging Materials	Plastic/Epoxy
Temperature level	AUTOMOTIVE
control mode	PEAK current
Control Technology	Pulse width MODULATION
Analog IC other types	switching regulator
Switch configuration	BUCK
Maximum switching frequency	2080 kHz

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ST1S12XX

ST1S12XX12, ST1S12XX18

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

DSON

typ. 250 mΩ and 400 mΩ

Uses tiny capacitors and inductors

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

Available in TSOT23-5L package

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

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

Table 1.

Device summary

Part numbers

ST1S12XX

ST1S12XX12

ST1S12XX18

Order codes

ST1S12GR

ST1S12G12R

ST1S12G18R

Package

TSOT23-5L

February 2010

Doc ID 14314 Rev 3

1/20

www.st.com

ST1S12XX12 Related Products

	ST1S12XX12	ST1S12XX	ST1S12XX_10	ST1S12XX18
Description	SWITCHING REGULATOR, 2080 kHz SWITCHING FREQ-MAX, PDSO5	SWITCHING REGULATOR, 2080 kHz SWITCHING FREQ-MAX, PDSO5	SWITCHING REGULATOR, 2080 kHz SWITCHING FREQ-MAX, PDSO5	SWITCHING REGULATOR, 2080 kHz SWITCHING FREQ-MAX, PDSO5
Number of functions	1	1	1	1
Number of terminals	5	5	5	5
Rated input voltage	3.6 V	3.6 V	3.6 V	3.6 V
Maximum limit input voltage	5.5 V	5.5 V	5.5 V	5.5 V
Minimum limit input voltage	2.5 V	2.5 V	2.5 V	2.5 V
Maximum operating temperature	125 Cel	125 Cel	125 Cel	125 Cel
Minimum operating temperature	-40 Cel	-40 Cel	-40 Cel	-40 Cel
Processing package description	LEAD FREE, TSOT-23, 5 PIN	LEAD FREE, TSOT-23, 5 PIN	LEAD FREE, TSOT-23, 5 PIN	LEAD FREE, TSOT-23, 5 PIN
state	ACTIVE	ACTIVE	ACTIVE	ACTIVE
Craftsmanship	NMOS	NMOS	NMOS	NMOS
packaging shape	Rectangle	Rectangle	Rectangle	Rectangle
Package Size	SMALL OUTLINE, THIN PROFILE, SHRINK PITCH	SMALL OUTLINE, THIN PROFILE, SHRINK PITCH	SMALL OUTLINE, THIN PROFILE, SHRINK PITCH	SMALL OUTLINE, THIN PROFILE, SHRINK PITCH
surface mount	Yes	Yes	Yes	Yes
Terminal form	GULL WING	GULL WING	GULL WING	GULL WING
Terminal spacing	0.9500 mm	0.9500 mm	0.9500 mm	0.9500 mm
Terminal location	pair	pair	pair	pair
Packaging Materials	Plastic/Epoxy	Plastic/Epoxy	Plastic/Epoxy	Plastic/Epoxy
Temperature level	AUTOMOTIVE	AUTOMOTIVE	AUTOMOTIVE	AUTOMOTIVE
control mode	PEAK current	PEAK current	PEAK current	PEAK current
Control Technology	Pulse width MODULATION	Pulse width MODULATION	Pulse width MODULATION	Pulse width MODULATION
Analog IC other types	switching regulator	switching regulator	switching regulator	switching regulator
Switch configuration	BUCK	BUCK	BUCK	BUCK
Maximum switching frequency	2080 kHz	2080 kHz	2080 kHz	2080 kHz

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