LX8942IDT Microsemi Corporation, LX8942IDT Datasheet

LX8942IDT

Manufacturer Part Number

LX8942IDT

Description

Low Dropout Dual Regulator

Manufacturer

Microsemi Corporation

Datasheet

1.LX8942IDT.pdf (8 pages)

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Rev. 1.2, 2006-01-20

8.2V/5V positive voltage regulator. One

output is a high current (up to 1000mA)

regulator that can be turned on or off by a

high

compatible switch. The second or standby

output remains on regardless. The on/off

switch not only shuts off the high current

output but actually puts the IC in a

micropower

quiescent

characteristic coupled with an extremely

low dropout, (0.55V for output current of

10mA) makes the LX8942 well suited for

power

memory. The LX8942 includes other

features which were originally designed

for automotive applications. These include

protection

installations, double battery jumps and

load dump (transients).

IMPORTANT: For the most current data, consult MICROSEMI’s website:

The Microsemi LX8942 is a dual

impedance

systems

current.

from

mode,

that

low

ON/OFF Switch (for

output voltage only)

11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570

reverse

achieving

require standby

This

Note: Available in Tape & Reel. Append the letters “TR” to the part number. (i.e. LX8942IDT-TR)

current

-40 to 85

0.1µF

D E S C R I P T I O N

C1*

(°C)

battery

unique

TTL

low

LX8942

voltage shutdown to protect both the internal

circuitry and the load during line transients,

such as load dump (60V). In addition, the

high current regulator design also has built-

in protection for short circuit and thermal

overload. During these fault conditions of

the primary output, the standby regulator

will continue to power its load.

of a family of dual regulators with a standby

output voltage of 5V. Other high-current

outputs programmed for 5V and 12V

regulation are available in the SG29055,

SG29125 devices.

function over the full automotive ambient

temperature range of -40°C to 85°C.

Input Voltage

Over Voltage

The high current regulator has over

The LX8942 is the 8.2 volt, ±5% version

Shutdown

Thermal

P R O D U C T H I G H L I G H T

P A C K A G E O R D E R I N F O

(VIN)

Integrated Products Division

5-Pin

Plastic TO-252

5V Standby

Regulator

Reference

Regulator

Microsemi

http://www.microsemi.com

Ground

1.23V

Bias

RoHS Compliant / Pb-free

They are designed to

* Required close to regulator package.

** Required for stability. May be increased without bound.

Capacitor must be rated to operate at the minimum

temperature expected for the regulator system.

LX8942IDT

Low Dropout Dual Regulator

100µF

C2 **

47µF

C3**

RODUCTION

Standby Output (VSB)

(5V, 60mA)

Output Voltage (VOUT1)

(8.2V, 1000mA)

2% Internally Trimmed Output

Two regulated outputs

Output current in excess of

1000mA

Low quiescent current standby

regulator

Drop-out Voltage, Input-output

differential <0.6V at 0.5A

Reverse battery protection

60V load dump protection

-50V reverse transient protection

Short circuit protection

Internal thermal overload

protection

ON/OFF switch for high current

output

Surface Mount TO-252

Automotive electronics for

controls, entertainment and

safety functions

Continuous operation systems

ATA

K E Y F E A T U R E S

A P P L I C A T I O N S

HEET

LX8942

Page 1

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