LP395
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SNOSBF3C –APRIL 1998–REVISED MARCH 2013
LP395 Ultra Reliable Power Transistor
Check for Samples: LP395
The LP395 is easy to use and only a few precautions
1FEATURES need be observed. Excessive collector to emitter
2• Internal Thermal Limiting voltage can destroy the LP395 as with any transistor.
• Internal Current and Power Limiting When the device is used as an emitter follower with a
low source impedance, it is necessary to insert a 4.7
• Specified 100 mA Output Current kΩresistor in series with the base lead to prevent
• 0.5 μA Typical Base Current possible emitter follower oscillations. Also since it has
• Directly Interfaces with TTL or CMOS good high frequency response, supply by-passing is
recommended.
• +36 Volts On Base Causes No Damage
• 2 μs Switching Time Areas where the LP395 differs from a standard NPN
transistor are in saturation voltage, leakage
(quiescent) current and in base current. Since the
DESCRIPTION internal protection circuitry requires voltage and
The LP395 is a fast monolithic transistor with current to function, the minimum voltage across the
complete overload protection. This very high gain device in the on condition (saturated) is typically 1.6
transistor has included on the chip, current limiting, Volts, while in the off condition the quiescent
power limiting, and thermal overload protection, (leakage) current is typically 200 μA. Base current in
making it difficult to destroy from almost any type of this device flows out of the base lead, rather than into
overload. Available in an epoxy TO-92 transistor the base as is the case with conventional NPN
package this device is specified to deliver 100 mA. transistors. Also the base can be driven positive up to
Thermal limiting at the chip level, a feature not 36 Volts without damage, but will draw current if
available in discrete designs, provides driven negative more than 0.6 Volts. Additionally, if
comprehensive protection against overload. the base lead is left open, the LP395 will turn on.
Excessive power dissipation or inadequate heat The LP395 is a low-power version of the 1-Amp
sinking causes the thermal limiting circuitry to turn off LM195/LM295/LM395 Ultra Reliable Power
the device preventing excessive die temperature. Transistor.
The LP395 offers a significant increase in reliability The LP395 is rated for operation over a −40°C to
while simplifying protection circuitry. It is especially +125°C range.
attractive as a small incandescent lamp or solenoid
driver because of its low drive requirements and
blowout-proof design.
Connection Diagram Typical Applications
Figure 1. TO-92 Package
See NS Package LP0003A
Figure 2. Fully Protected Lamp Driver
1Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
2All trademarks are the property of their respective owners.
PRODUCTION DATA information is current as of publication date. Copyright © 1998–2013, Texas Instruments Incorporated
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
LP395
SNOSBF3C –APRIL 1998–REVISED MARCH 2013
www.ti.com
These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam
during storage or handling to prevent electrostatic damage to the MOS gates.
ABSOLUTE MAXIMUM RATINGS(1)
Collector to Emitter Voltage 36V
Collector to Base Voltage 36V
Base to Emitter Voltage (Forward) 36V
Base to Emitter Voltage (Reverse) 10V
Base to Emitter Current (Reverse) 20 mA
Collector Current Limit Internally Limited
Power Dissipation Internally Limited
Operating Temperature Range −40°C to +125°C
Storage Temperature Range −65°C to +150°C
Lead Temp. (Soldering, 10 seconds) 260°C
(1) Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for
which the device is functional, but do not ensure specific performance limits.
ELECTRICAL CHARACTERISTICS Tested Limit Design Limit Units
Symbol Parameter Conditions Typical (1) (2) (Limit)
VCE Collector to Emitter 0.5 mA ≤IC≤100 mA 36 36 V(Max)
Operating Voltage (3)
ICL Collector Current Limit VBE = 2V, VCE = 36V 45 25 20 mA(Min)
(4) VBE = 2V, VCE = 15V 90 60 50 mA(Min)
VBE = 2V, 2V ≤VCE ≤6V 130 100 100 mA(Min)
IBBase Current 0 ≤IC≤100 mA −0.3 −2.0 −2.5 μA(Max)
IQQuiescent Current VBE = 0V, 0 ≤VCE ≤36V 0.24 0.50 0.60 mA(Max)
VCE(SAT) Saturation Voltage VBE = 2V, IC= 100 mA 1.82 2.00 2.10 V(Max)
BVBE Base to Emitter Break- 0 ≤VCE ≤36V, IB= 2 μA 36 36 V(Min)
down Voltage (4)
VBE Base to Emitter Voltage IC= 5 mA 0.69 0.79 0.90 V(Max)
(5) IC= 100 mA (4) 1.02 1.40 V (Max)
tSSwitching Time VCE = 20V, RL= 200Ω2μs
VBE = 0V, +2V, 0V
θJA Thermal Resistance 0.4″leads soldered to 150 180 °C/W
Junction to Ambient printed circuit board (Max)
0.125″leads soldered to 130 160 °C/W
printed circuit board (Max)
(1) Specified and 100% production tested.
(2) Specified (but not 100% production tested) over the operating temperature and supply voltage ranges. These limits are not used to
calculate outgoing quality levels.
(3) Parameters identified with boldface type apply at temp. extremes. All other numbers, unless noted apply at +25°C.
(4) These numbers apply for pulse testing with a low duty cycle.
(5) Base positive with respect to emitter.
2Submit Documentation Feedback Copyright © 1998–2013, Texas Instruments Incorporated
Product Folder Links: LP395
LP395
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SNOSBF3C –APRIL 1998–REVISED MARCH 2013
SIMPLIFIED CIRCUIT
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 a
lamp failure of this type will also cause the lamp driver to fail. Because of its high gain and blowout-proof design,
the LP395 is an ideal candidate for reliably driving small incandescent lamps. Additionally, the current limiting
characteristics of the LP395 are advantageous as it serves to limit the cold filament inrush current, thus
increasing lamp life.
Copyright © 1998–2013, Texas Instruments Incorporated Submit Documentation Feedback 3
Product Folder Links: LP395
LP395
SNOSBF3C –APRIL 1998–REVISED MARCH 2013
www.ti.com
TYPICAL PERFORMANCE CHARACTERISTICS
5 Volt Transfer Function 36 Volt Transfer Function
Figure 3. Figure 4.
Collector Characteristics Available Collector Current
Figure 5. Figure 6.
Quiescent Collector Current Saturation Voltage
Figure 7. Figure 8.
4Submit Documentation Feedback Copyright © 1998–2013, Texas Instruments Incorporated
Product Folder Links: LP395
LP395
SNOSBF3C –APRIL 1998–REVISED MARCH 2013
www.ti.com
TYPICAL APPLICATIONS
Figure 10. Lamp Flasher
(Short Circuit Proof)
Figure 11. Optically Isolated
Switch
Figure 12. Two Terminal
Current Limiter
Figure 13. Composite PNP
6Submit Documentation Feedback Copyright © 1998–2013, Texas Instruments Incorporated
Product Folder Links: LP395
LP395
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SNOSBF3C –APRIL 1998–REVISED MARCH 2013
REVISION HISTORY
Changes from Revision B (March 2013) to Revision C Page
• Changed layout of National Data Sheet to TI format ............................................................................................................ 6
Copyright © 1998–2013, Texas Instruments Incorporated Submit Documentation Feedback 7
Product Folder Links: LP395
PACKAGE OPTION ADDENDUM
www.ti.com 6-Feb-2020
Addendum-Page 1
PACKAGING INFORMATION
Orderable Device Status
(1)
Package Type Package
Drawing Pins Package
Qty Eco Plan
(2)
Lead/Ball Finish
(6)
MSL Peak Temp
(3)
Op Temp (°C) Device Marking
(4/5)
Samples
LP395Z/LFT1 ACTIVE TO-92 LP 3 2000 Green (RoHS
& no Sb/Br) SN N / A for Pkg Type LP
395Z
LP395Z/NOPB ACTIVE TO-92 LP 3 1800 Green (RoHS
& no Sb/Br) SN N / A for Pkg Type -40 to 125 LP
395Z
(1) The marketing status values are defined as follows:
ACTIVE: Product device recommended for new designs.
LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect.
NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in a new design.
PREVIEW: Device has been announced but is not in production. Samples may or may not be available.
OBSOLETE: TI has discontinued the production of the device.
(2) RoHS: TI defines "RoHS" to mean semiconductor products that are compliant with the current EU RoHS requirements for all 10 RoHS substances, including the requirement that RoHS substance
do not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, "RoHS" products are suitable for use in specified lead-free processes. TI may
reference these types of products as "Pb-Free".
RoHS Exempt: TI defines "RoHS Exempt" to mean products that contain lead but are compliant with EU RoHS pursuant to a specific EU RoHS exemption.
Green: TI defines "Green" to mean the content of Chlorine (Cl) and Bromine (Br) based flame retardants meet JS709B low halogen requirements of <=1000ppm threshold. Antimony trioxide based
flame retardants must also meet the <=1000ppm threshold requirement.
(3) MSL, Peak Temp. - The Moisture Sensitivity Level rating according to the JEDEC industry standard classifications, and peak solder temperature.
(4) There may be additional marking, which relates to the logo, the lot trace code information, or the environmental category on the device.
(5) Multiple Device Markings will be inside parentheses. Only one Device Marking contained in parentheses and separated by a "~" will appear on a device. If a line is indented then it is a continuation
of the previous line and the two combined represent the entire Device Marking for that device.
(6) Lead/Ball Finish - Orderable Devices may have multiple material finish options. Finish options are separated by a vertical ruled line. Lead/Ball Finish values may wrap to two lines if the finish
value exceeds the maximum column width.
Important Information and Disclaimer:The information provided on this page represents TI's knowledge and belief as of the date that it is provided. TI bases its knowledge and belief on information
provided by third parties, and makes no representation or warranty as to the accuracy of such information. Efforts are underway to better integrate information from third parties. TI has taken and
continues to take reasonable steps to provide representative and accurate information but may not have conducted destructive testing or chemical analysis on incoming materials and chemicals.
TI and TI suppliers consider certain information to be proprietary, and thus CAS numbers and other limited information may not be available for release.
In no event shall TI's liability arising out of such information exceed the total purchase price of the TI part(s) at issue in this document sold by TI to Customer on an annual basis.
PACKAGE OPTION ADDENDUM
www.ti.com 6-Feb-2020
Addendum-Page 2
www.ti.com
PACKAGE OUTLINE
3X 2.67
2.03
5.21
4.44
5.34
4.32
3X
12.7 MIN
2X 1.27 0.13
3X 0.55
0.38
4.19
3.17
3.43 MIN
3X 0.43
0.35
(2.54)
NOTE 3
2X
2.6 0.2
2X
4 MAX
SEATING
PLANE
6X
0.076 MAX
(0.51) TYP
(1.5) TYP
TO-92 - 5.34 mm max heightLP0003A
TO-92
4215214/B 04/2017
NOTES:
1. All linear dimensions are in millimeters. Any dimensions in parenthesis are for reference only. Dimensioning and tolerancing
per ASME Y14.5M.
2. This drawing is subject to change without notice.
3. Lead dimensions are not controlled within this area.
4. Reference JEDEC TO-226, variation AA.
5. Shipping method:
a. Straight lead option available in bulk pack only.
b. Formed lead option available in tape and reel or ammo pack.
c. Specific products can be offered in limited combinations of shipping medium and lead options.
d. Consult product folder for more information on available options.
EJECTOR PIN
OPTIONAL
PLANE
SEATING
STRAIGHT LEAD OPTION
321
SCALE 1.200
FORMED LEAD OPTION
OTHER DIMENSIONS IDENTICAL
TO STRAIGHT LEAD OPTION
SCALE 1.200
www.ti.com
EXAMPLE BOARD LAYOUT
0.05 MAX
ALL AROUND
TYP
(1.07)
(1.5) 2X (1.5)
2X (1.07)
(1.27)
(2.54)
FULL R
TYP
( 1.4)0.05 MAX
ALL AROUND
TYP
(2.6)
(5.2)
(R0.05) TYP
3X ( 0.9) HOLE
2X ( 1.4)
METAL
3X ( 0.85) HOLE
(R0.05) TYP
4215214/B 04/2017
TO-92 - 5.34 mm max heightLP0003A
TO-92
LAND PATTERN EXAMPLE
FORMED LEAD OPTION
NON-SOLDER MASK DEFINED
SCALE:15X
SOLDER MASK
OPENING
METAL
2X
SOLDER MASK
OPENING
123
LAND PATTERN EXAMPLE
STRAIGHT LEAD OPTION
NON-SOLDER MASK DEFINED
SCALE:15X
METAL
TYP
SOLDER MASK
OPENING
2X
SOLDER MASK
OPENING
2X
METAL
12 3
www.ti.com
TAPE SPECIFICATIONS
19.0
17.5
13.7
11.7
11.0
8.5
0.5 MIN
TYP-4.33.7
9.75
8.50
TYP
2.9
2.4 6.75
5.95
13.0
12.4
(2.5) TYP
16.5
15.5
32
23
4215214/B 04/2017
TO-92 - 5.34 mm max heightLP0003A
TO-92
FOR FORMED LEAD OPTION PACKAGE
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