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1PMT5928BT3 Datasheet PDF - Motorola Inc

Part Number 1PMT5928BT3
Description PLASTIC SURFACE MOUNT ZENER DIODES 2.5 WATTS 3.3.91 VOLTS
Manufacturers Motorola Inc 
Logo Motorola  Inc Logo 

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MOTOROLA
SEMICONDUCTOR TECHNICAL DATA
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by 1PMT5913BT3/D
Product Preview
2.5 Watt Plastic Surface Mount
Silicon Zener Diodes
Powermite® Package
This complete new line of zener/tvs diodes offers a 2.5 watt series in a micro
miniature, space saving surface mount package. The Powermite zener/tvs
diodes are designed for use as a tvs or a regulation device in automotive and
telecommunication applications where efficiency, low leakage, size/height and
profile are important.
Features:
Voltage Range – 3.3 to 91 V
ESD Rating of Class 3 (> 16 kV) per Human Body Model
Low Profile – maximum height of 1.1mm
Integral Heat Sink/Locking Tabs
Full metallic bottom eliminates flux entrapment
Small Footprint – Footprint area of 8.45mm2
Supplied in 12mm tape and reel – 12,000 units per reel
Powermite is JEDEC Registered as DO–216AA
1PMT5913BT3
through
1PMT5948BT3
PLASTIC SURFACE MOUNT
ZENER DIODES
2.5 WATTS
3.3–91 VOLTS
1
2
CASE 457–01
PLASTIC
12
1: CATHODE
2: ANODE
MAXIMUM RATINGS
Rating
Symbol
Value
Unit
DC Power Dissipation @ TL = 75°C, Measured at Zero Lead Length
Derate above 75°C
°PD°
2.5 °Watts°
40 mW/°C
DC Power Dissipation @ TA = 25°C(1)
Derate above 25°C
°PD°
380 °mW
2.8 mW/°C
Thermal Resistance from Junction to Lead
RθJL 26 °C/W
Thermal Resistance from Junction to Ambient
RθJA 324 °C/W
Operating and Storage Junction Temperature Range
Typical Ppk Dissipation @ TL < 25°C, (PW–10/1000 µs per Figure 8)(2)
TJ, Tstg
Ppk
– 65 to +150
200
°C
Watts
Typical Ppk Dissipation @ TL < 25°C, (PW–8/20 µs per Figure 9)(2)
Ppk
1000
Watts
(1)FR4 Board, within 1” to device, using Motorola minimum recommended footprint, as shown in case 403A outline dimensions spec.
(2)Non–repetitive current pulse.
This document contains preview information only and is subject to change without notice.
Powermite is a registered trademark of Microsemi Corporation.
Thermal Clad is a trademark of the Bergquist Company.
©1MPoMtoTro5la9,1In3cB. 1T9936through 1PMT5948BT3
MOTOROLA
1

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1PMT5928BT3 equivalent
INFORMATION FOR USING THE POWERMITE SURFACE MOUNT PACKAGE
MINIMUM RECOMMENDED FOOTPRINT FOR SURFACE MOUNTED APPLICATIONS
Surface mount board layout is a critical portion of the total
design. The footprint for the semiconductor packages must
be the correct size to insure proper solder connection
interface between the board and the package. With the
correct pad geometry, the packages will self align when
subjected to a solder reflow process.
0.105
2.67
0.025
0.635
0.030
0.762
0.100
2.54
0.050
1.27
POWERMITE
inches
mm
POWERMITE POWER DISSIPATION
The power dissipation of the Powermite is a function of the
drain pad size. This can vary from the minimum pad size for
soldering to a pad size given for maximum power dissipation.
Power dissipation for a surface mount device is determined
by TJ(max), the maximum rated junction temperature of the
die, RθJA, the thermal resistance from the device junction to
ambient, and the operating temperature, TA. Using the
values provided on the data sheet for the Powermite
package, PD can be calculated as follows:
PD =
TJ(max) – TA
RθJA
The values for the equation are found in the maximum
ratings table on the data sheet. Substituting these values into
the equation for an ambient temperature TA of 25°C, one can
calculate the power dissipation of the device which in this
case is 386 milliwatts.
PD =
150°C – 25°C
324°C/W
= 386 milliwatts
The 324°C/W for the Powermite package assumes the use
of the recommended footprint on a glass epoxy printed circuit
board to achieve a power dissipation of 386 milliwatts. There
are other alternatives to achieving higher power dissipation
from the Powermite package. Another alternative would be
to use a ceramic substrate or an aluminum core board such
as Thermal Clad. Using a board material such as Thermal
Clad, an aluminum core board, the power dissipation can be
doubled using the same footprint.
SOLDERING PRECAUTIONS
The melting temperature of solder is higher than the rated
temperature of the device. When the entire device is heated
to a high temperature, failure to complete soldering within a
short time could result in device failure. Therefore, the
following items should always be observed in order to
minimize the thermal stress to which the devices are
subjected.
Always preheat the device.
The delta temperature between the preheat and soldering
should be 100°C or less.*
When preheating and soldering, the temperature of the
leads and the case must not exceed the maximum
temperature ratings as shown on the data sheet. When
using infrared heating with the reflow soldering method,
the difference shall be a maximum of 10°C.
The soldering temperature and time shall not exceed
260°C for more than 10 seconds.
When shifting from preheating to soldering, the maximum
temperature gradient shall be 5°C or less.
After soldering has been completed, the device should be
allowed to cool naturally for at least three minutes.
Gradual cooling should be used as the use of forced
cooling will increase the temperature gradient and result
in latent failure due to mechanical stress.
Mechanical stress or shock should not be applied during
cooling.
* Soldering a device without preheating can cause excessive
thermal shock and stress which can result in damage to the
device.
1PMT5913BT3 through 1PMT5948BT3
MOTOROLA
5


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1PMT5928BT3The function is PLASTIC SURFACE MOUNT ZENER DIODES 2.5 WATTS 3.3.91 VOLTS.Motorola  Inc
Motorola Inc

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