SI91861DY-E3 datasheet, PDF - EEWORLD Datasheet

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SI91861DY-E3: DescriptionIC VREG 3.3 V FIXED POSITIVE REGULATOR, PDSO8, SO-8, Fixed Positive Single Output Standard Regulator; CategoryThe power supply circuit; File Size116KB，8 Pages; ManufacturerVishay; Websitehttp://www.vishay.com; Environmental Compliance

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SI91861DY-E3 Overview

IC VREG 3.3 V FIXED POSITIVE REGULATOR, PDSO8, SO-8, Fixed Positive Single Output Standard Regulator

SI91861DY-E3 Parametric

Parameter Name	Attribute value
Is it lead-free?	Lead free
Is it Rohs certified?	conform to
Maker	Vishay
Parts packaging code	SOIC
package instruction	SOP, SOP8,.25
Contacts	8
Reach Compliance Code	unknown
ECCN code	EAR99
Adjustability	FIXED
Maximum absolute input voltage	6 V
Maximum input voltage	5.5 V
Minimum input voltage	4.5 V
JESD-30 code	R-PDSO-G8
JESD-609 code	e3
length	4.9 mm
Humidity sensitivity level	1
Number of functions	1
Output times	1
Number of terminals	8
Working temperatureTJ-Max	150 °C
Maximum output current 1	0.4 A
Maximum output voltage 1	3.399 V
Minimum output voltage 1	3.201 V
Nominal output voltage 1	3.3 V
Package body material	PLASTIC/EPOXY
encapsulated code	SOP
Encapsulate equivalent code	SOP8,.25
Package shape	RECTANGULAR
Package form	SMALL OUTLINE
method of packing	BULK PACK
Peak Reflow Temperature (Celsius)	260
Certification status	Not Qualified
Regulator type	FIXED POSITIVE SINGLE OUTPUT STANDARD REGULATOR
Maximum seat height	1.75 mm
surface mount	YES
technology	CMOS
Terminal surface	Matte Tin (Sn)
Terminal form	GULL WING
Terminal pitch	1.27 mm
Terminal location	DUAL
Maximum time at peak reflow temperature	40
Maximum voltage tolerance	3%
width	3.9 mm
Base Number Matches	1

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Si91861

Vishay Siliconix

400-mA Smart Regulator for Network Interface Card

FEATURES

Single Fixed 3.3-V Output

Linear Regulator for 5-V Power Input

Auxilliary Input Can Be Bypassed

Automatically Switches Between Linear Regulator

and Bypass Mode

Linear Regulator: 3.3-V

"3%

Output at 400-mA

Current; 600-mA Peak Output Current

Low Bypass Switch Voltage-Drop: <55-mV at

150 mA

Built-in Short Circuit and Thermal Shutdown

Protection

Low Supply Current

SOIC-8 Package

APPLICATIONS

Network Interface Cards (NIC)

PCMCIA Cards

Cardbus

Desktop Computers/Workstations

DESCRIPTION

The Si91861 provides a constant 3.3-V output with multiple

inputs. This function is required in many power interface

applications, such as the Network Interface Card (NIC). The

Si91861 is offered in small SOIC-8 package with up to 2-W

power handling capability. The complete application circuit

uses only three external components.

5 V

> 3.3 V

AUX

, where the selection is done internally and

automatically by the Si91861. The power handling capability

is as such as to carry at least 400-mA continuous load current

for any power input condition.

In order to satisfy the stringent ambient temperature

requirements in many applications, the Si91861 is rated for the

industrial temperature range of

−40_C

to 85_C.

The Si91861 is available in both standard and lead (Pb)-free

packages.

The linear regulator steps down from the 5-V supply (5 V

)

to 3.3 V. A 200-mΩ bypass switch is integrated to connect the

3.3-V

AUX

input to the output. The power drawn priority is

FUNCTIONAL BLOCK DIAGRAM

Si91861

5 V

Regulator

and

Control

3.3 V

OUT

3.3 V

AUX

GND

Document Number: 71637

S-40702—Rev. B, 19-Apr-04

www.vishay.com

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