LP395Z/NOPB National Semiconductor, LP395Z/NOPB Datasheet

LP395Z/NOPB

Manufacturer Part Number

LP395Z/NOPB

Description

IC TRANS PWR ULTRA RELBLE TO92-3

Manufacturer

National Semiconductor

Type

Powerr

Datasheets

1.LP395ZNOPB.pdf (5 pages)

2.LP395ZNOPB.pdf (4 pages)

Specifications of LP395Z/NOPB

Transistor Type

NPN

Current - Collector (ic) (max)

100mA

Voltage - Collector Emitter Breakdown (max)

36V

Mounting Type

Through Hole

Package / Case

TO-92-3 (Standard Body), TO-226

Current, Collector

90 mA

Package Type

TO-92

Polarity

NPN

Primary Type

Voltage, Breakdown, Collector To Emitter

36 V

Voltage, Collector To Base

36 V

Voltage, Collector To Emitter

36 V

Voltage, Collector To Emitter, Saturation

1.82 V

Voltage, Emitter To Base

1.02 V

Lead Free Status / RoHS Status

Lead free / RoHS Compliant

Power - Max

Current - Collector Cutoff (max)

Frequency - Transition

Dc Current Gain (hfe) (min) @ Ic, Vce

Vce Saturation (max) @ Ib, Ic

Lead Free Status / Rohs Status

RoHS Compliant part Electrostatic Device

Other names

*LP395Z
*LP395Z/NOPB
LP395Z

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LP395

Ultra Reliable Power Transistor

General Description

The LP395 is a fast monolithic transistor with complete

overload protection. This very high gain transistor has in-

cluded on the chip, current limiting, power limiting, and ther-

mal overload protection, making it difficult to destroy from

almost any type of overload. Available in an epoxy TO-92

transistor package this device is guaranteed to deliver 100

mA.

Thermal limiting at the chip level, a feature not available in

discrete designs, provides comprehensive protection against

overload. Excessive power dissipation or inadequate heat

sinking causes the thermal limiting circuitry to turn off the

device preventing excessive die temperature.

The LP395 offers a significant increase in reliability while

simplifying protection circuitry. It is especially attractive as a

small incandescent lamp or solenoid driver because of its

low drive requirements and blowout-proof design.

The LP395 is easy to use and only a few precautions need

be observed. Excessive collector to emitter voltage can de-

stroy the LP395 as with any transistor. When the device is

used as an emitter follower with a low source impedance, it

is necessary to insert a 4.7 kΩ resistor in series with the

base lead to prevent possible emitter follower oscillations.

Also since it has good high frequency response, supply

by-passing is recommended.

Areas where the LP395 differs from a standard NPN transis-

tor are in saturation voltage, leakage (quiescent) current and

Connection Diagram

Order Number LP395Z

See NS Package Z03A

TO-92 Package

DS005525

00552501

in base current. Since the internal protection circuitry re-

quires voltage and current to function, the minimum voltage

across the device in the on condition (saturated) is typically

1.6 Volts, while in the off condition the quiescent (leakage)

current is typically 200 µA. Base current in this device flows

out of the base lead, rather than into the base as is the case

with conventional NPN transistors. Also the base can be

driven positive up to 36 Volts without damage, but will draw

current if driven negative more than 0.6 Volts. Additionally, if

the base lead is left open, the LP395 will turn on.

The LP395 is a low-power version of the 1-Amp LM195/

LM295/LM395 Ultra Reliable Power Transistor.

The LP395 is rated for operation over a −40˚C to +125˚C

range.

Features

n Internal thermal limiting

n Internal current and power limiting

n Guaranteed 100 mA output current

n 0.5 µA typical base current

n Directly interfaces with TTL or CMOS

n +36 Volts on base causes no damage

n 2 µs switching time

Typical Applications

Fully Protected Lamp Driver

00552503

www.national.com

April 2005

Related parts for LP395Z/NOPB

LP395Z/NOPB Summary of contents

Page 1

... Connection Diagram TO-92 Package Order Number LP395Z See NS Package Z03A © 2005 National Semiconductor Corporation in base current. Since the internal protection circuitry re- quires voltage and current to function, the minimum voltage across the device in the on condition (saturated) is typically 1.6 Volts, while in the off condition the quiescent (leakage) current is typically 200 µ ...

Page 2

Absolute Maximum Ratings Collector to Emitter Voltage Collector to Base Voltage Base to Emitter Voltage (Forward) Base to Emitter Voltage (Reverse) Base to Emitter Current (Reverse) Electrical Characteristics Symbol Parameter V Collector to Emitter CE Operating Voltage I Collector Current ...

Page 3

Applications Information One failure mode incandescent lamps may experience is one in which the filament resistance drops to a very low value before it actually blows out. This is especially rough on most solid-state lamp drivers and in most cases ...

Page 4

Typical Performance Characteristics Collector Current Threshold Typical Applications Lamp Flasher (Short Circuit Proof) Two Terminal Current Limiter 00552508 www.national.com (Continued) 00552509 00552506 4 Optically Isolated Switch 00552507 Composite PNP 00552502 ...

Page 5

... BANNED SUBSTANCE COMPLIANCE National Semiconductor manufactures products and uses packing materials that meet the provisions of the Customer Products Stewardship Specification (CSP-9-111C2) and the Banned Substances and Materials of Interest Specification (CSP-9-111S2) and contain no ‘‘Banned Substances’’ as defined in CSP-9-111S2. ...

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