These miniature surface mount MOSFET s feature ultra low R
DS(on)
and true logic level performance. They are capable of withstanding
high energy in the avalanche and commutation modes and the
drain–to–source diode has a very low reverse recovery time.
MiniMOS devices are designed for use in low voltage, high speed
switching applications where power efficiency is important. Typical
applications are dc–dc converters, and power management in portable
and battery powered products such as computers, printers, cellular and
cordless phones. They can also be used for low voltage motor controls
in mass storage products such as disk drives and tape drives.
• Ultra Low R
Provides Higher Efficiency and Extends
DS(on)
Battery Life
• Logic Level Gate Drive – Can Be Driven by Logic ICs
• Miniature SO–8 Surface Mount Package – Saves Board Space
• Diode Is Characterized for Use In Bridge Circuits
• Diode Exhibits High Speed, With Soft Recovery
• I
Specified at Elevated Temperature
DSS
• Mounting Information for SO–8 Package Provided
MAXIMUM RATINGS (T
Rating
Drain–to–Source Voltage
N–Channel
P–Channel
Gate–to–Source VoltageV
Drain Current – ContinuousN–Channel
– PulsedN–Channel
Operating and Storage Temperature RangeTJ and
Total Power Dissipation @ TA= 25°C
(Note 2)
Thermal Resistance – Junction to Ambient
(Note 2)
Maximum Lead Temperature for Soldering
Purposes, 1/8″ from case for 10 seconds.
1. Negative signs for P–Channel device omitted for clarity.
2. Mounted on 2 ″ square FR4 board (1″ sq. 2 oz. Cu 0.06″ thick single sided) with
one die operating, 10 sec. max.
= 25°C unless otherwise noted) (Note 1)
J
SymbolValueUnit
V
P–Channel
P–Channel
R
I
T
P
DSS
GS
I
D
DM
stg
D
θ
JA
T
L
20
20
±12Vdc
5.2
3.4
48
17
–55 to
150
2.0Watts
62.5°C/W
260°C
Vdc
A
°C
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2 AMPERES
20 VOLTS
R
DS(on)
R
DS(on)
G
D2C02 = Specific Device Code
L= Location Code
Y= Year
WW = Work Week
DevicePackageShipping
= 43 m (N–Channel)
= 120 m (P–Channel)
N–Channel
D
G
S
8
1
SO–8, Dual
CASE 751
STYLE 14
PIN ASSIGNMENT
N–Source
N–Gate
P–Source
P–Gate
ORDERING INFORMATION
1
2
3
4
Top View
8
7
6
5
P–Channel
D
MARKING
DIAGRAM
D2C02
LYWW
N–Drain
N–Drain
P–Drain
P–Drain
S
Semiconductor Components Industries, LLC, 2002
September, 2002 – Rev. 0
NTMD2C02R2SO–82500/Tape & Reel
Preferred devices are recommended choices for future use
and best overall value.
1Publication Order Number:
NTMD2C02R2/D
NTMD2C02R2
)
(V
DD
Vdc, I
D
Adc
V
GS
Vdc
(V
DS
Vdc, I
D
Adc
V
GS
Vdc
ELECTRICAL CHARACTERISTICS (T
= 25°C unless otherwise noted) (Note 3)
A
CharacteristicSymbolPolarityMinTypMaxUnit
OFF CHARACTERISTICS
Drain–Source Breakdown Voltage
= 0 Vdc, ID = 250 µAdc)
(V
GS
Zero Gate Voltage Drain Current
(V
= 0 Vdc, VDS = 20 Vdc)
GS
= 0 Vdc, VDS = 12 Vdc)
(V
GS
Gate–Body Leakage Current
= ±12 Vdc, VDS = 0)
(V
GS
V
(BR)DSS
I
DSS
I
GSS
ON CHARACTERISTICS(Note 4)
Gate Threshold Voltage
= VGS, ID = 250 µAdc)
(V
DS
Drain–to–Source On–Resistance
(V
= 4.5 Vdc, ID = 4.0 Adc)
GS
= 4.5 Vdc, ID = 2.4 Adc)
(V
GS
Drain–to–Source On–Resistance
(V
= 2.7 Vdc, ID = 2.0 Adc)
GS
= 2.7 Vdc, ID = 1.2 Adc)
(V
GS
Forward Transconductance
(V
= 2.5 Vdc, ID = 2.0 Adc)
DS
= 2.5 Vdc, ID = 1.0 Adc)
(V
DS
V
GS(th)
R
DS(on)
R
DS(on)
g
FS
DYNAMIC CHARACTERISTICS
Input Capacitance
Output Capacitance
(VDS = 10 Vdc, VGS = 0 Vdc,
C
iss
C
oss
f = 1.0 MHz)
Transfer Capacitance
C
rss
SWITCHING CHARACTERISTICS(Note 5)
Turn–On Delay Time
Rise Time
Turn–Off Delay Time
Fall Time
Turn–On Delay Time
Rise Time
Turn–Off Delay Time
Fall Time
(VDD = 16 Vdc, ID = 4.0 Adc,
16
V
GS
R
= 4.5 Vdc,
= 6.0 Ω)
G
4.0
(VDD = 10 Vdc, ID = 1.2 Adc,
= 2.7 Vdc,
= 2.7
V
R
= 6.0 Ω)
G
(VDS = 16 Vdc, ID = 6.0 Adc,
16
= 4.5 Vdc,
V
GS
R
= 6.0 Ω)
G
(V
= 10 Vdc, ID = 2.4 Adc,
DS
V
= 4.5 Vdc,
= 4.5
= 6.0 Ω)
R
G
,
6.0
,
t
d(on)
,
t
r
t
d(off)
t
f
t
d(on)
,
t
r
t
d(off)
t
f
3. Negative signs for P–Channel device omitted for clarity.
8. Switching characteristics are independent of operating junction temperature.
(N)
(P)
(N)
(P)
(N)
(P)
(N)
(P)
(N)
(P)
(N)
(P)
(N)
(P)
(N)
(P)
(N)
(P)
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
12
10
1.5
1.5
4.0
5.0
3.0
3.0
0.83
0.88
30
37
15
16
15
21
0.02
0.025
20
18
1.1
1.0
nC
–
–
–
–
–
–
Vdc
–
ns
–
–
–
–
–
–
µC
–
http://onsemi.com
3
12
10
8
6
4
, DRAIN CURRENT (AMPS)
D
2
I
10 V
NTMD2C02R2
TYPICAL ELECTRICAL CHARACTERISTICS
N–ChannelP–Channel
2.5 V
4.5 V
3.2 V
2.0 V
TJ = 25°C
1.8 V
VGS = 1.5 V
4
3
2
1
DRAIN CURRENT (AMPS)
D,
–I
VGS = –2.1 V
VGS = –10 V
= –4.5 V
V
GS
V
= –2.5 V
GS
TJ = 25°C
VGS = –1.9 V
VGS = –1.7 V
VGS = –1.5 V
0
12
10
8
6
4
, DRAIN CURRENT (AMPS)
2
D
I
0
V
, DRAIN–TO–SOURCE VOLTAGE (VOLTS)
DS
Figure 1. On–Region Characteristics
VDS ≥ 10 V
100°C
TJ = –55°C
VGS, GATE–TO–SOURCE VOLTAGE (VOLTS)
25°C
Figure 2. Transfer Characteristics
1.751.51.2510.750.50.250
0
0
–V
, DRAIN–TO–SOURCE VOLTAGE (VOLTS)
DS
6
84210
Figure 1. On–Region Characteristics
5
VDS ≥ –10 V
4
3
2
TJ = 25°C
DRAIN CURRENT (AMPS)
1
D,
TJ = 100°C
–I
2.521.510.5
0
1
, GATE–TO–SOURCE VOLTAGE (VOLTS)
–V
GS
TJ = 55°C
1.52
2.5
3
Figure 2. Transfer Characteristics
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4
0
0.07
0.06
0.05
0.04
0.03
NTMD2C02R2
TYPICAL ELECTRICAL CHARACTERISTICS
N–ChannelP–Channel
0.2
ID = 6.0 A
T
= 25°C
J
0.15
TJ = 25°C
0.1
0.02
0.01
, DRAIN–TO–SOURCE RESISTANCE (OHMS)
0
DS(on)
R
0.05
0.04
0.03
0.02
, DRAIN–TO–SOURCE RESISTANCE (OHMS)
0.01
DS(on)
R
VGS, GATE–TO–SOURCE VOLTAGE (VOLTS)
Figure 4. On–Resistance versus Drain Current
Figure 3. On–Resistance versus
Gate–To–Source Voltage
TJ = 25°C
VGS = 2.5 V
4.5 V
7531
ID, DRAIN CURRENT (AMPS)
and Gate Voltage
0.05
, DRAIN–TO–SOURCE RESISTANCE ()
DS(on)
R
0.12
0.1
0.08
0.06
, DRAIN–TO–SOURCE RESISTANCE ()
0.04
DS(on)
R
0
2
TJ = 25°C
1
1086420
11913
Figure 4. On–Resistance versus Drain Current
46
–V
GATE–TO–SOURCE VOLTAGE (VOLTS)
GS,
Figure 3. On–Resistance versus
Gate–To–Source Voltage
VGS = –2.7 V
VGS = –4.5 V
1.522.53.5
–ID, DRAIN CURRENT (AMPS)
and Gate Voltage
8
4.543
1.6
1.4
1.2
1
(NORMALIZED)
0.8
, DRAIN–TO–SOURCE RESISTANCE
0.6
DS(on)
R
ID = 6.0 A
V
= 4.5 V
GS
TJ, JUNCTION TEMPERATURE (°C)
Figure 5. On–Resistance Variation with
Temperature
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1.6
1.4
1.2
1
, DRAIN–TO–SOURCE
0.8
DS(on)
R
RESISTANCE (NORMALIZED)
1501251007550250–25–50
0.6
–50
5
ID = –2.4 A
V
= –4.5 V
GS
–2502575
T
JUNCTION TEMPERATURE (°C)
J,
Figure 5. On–Resistance Variation with
Temperature
15
12510050
NTMD2C02R2
TYPICAL ELECTRICAL CHARACTERISTICS
N–ChannelP–Channel
1000
, LEAKAGE (nA)
I
100
10
DSS
0.1
0.01
VGS = 0 V
TJ = 125°C
100°C
1
VDS, DRAIN–TO–SOURCE VOLTAGE (VOLTS)
Figure 6. Drain–To–Source Leakage
Current versus Voltage
25°C
POWER MOSFET SWITCHING
Switching behavior is most easily modeled and predicted
by recognizing that the power MOSFET is charge
controlled. The lengths of various switching intervals (∆t)
are determined by how fast the FET input capacitance can
be charged by current from the generator.
The published capacitance data is difficult to use for
calculating rise and fall because drain–gate capacitance
varies greatly with applied voltage. Accordingly, gate
charge data is used. In most cases, a satisfactory estimate of
average input current (I
) can be made from a
G(AV)
rudimentary analysis of the drive circuit so that
t = Q/I
G(AV)
During the rise and fall time interval when switching a
resistive load, VGS remains virtually constant at a level
known as the plateau voltage, V
. Therefore, rise and fall
SGP
times may be approximated by the following:
tr = Q2 x RG/(VGG – V
tf = Q2 x RG/V
GSP
GSP
)
where
VGG = the gate drive voltage, which varies from zero to V
GG
RG = the gate drive resistance
and Q2 and V
are read from the gate charge curve.
GSP
During the turn–on and turn–off delay times, gate current is
not constant. The simplest calculation uses appropriate
values from the capacitance curves in a standard equation for
voltage change in an RC network. The equations are:
t
d(on)
t
d(off)
= RG C
= RG C
In [VGG/(V
iss
In (VGG/V
iss
GG
GSP
– V
)
GSP
)]
1000
VGS = 0 V
100
10
LEAKAGE (nA)
1
DSS,
–I
0.1
20161284
0.01
–V
DS,
Figure 6. Drain–To–Source Leakage
The capacitance (C
TJ = 125°C
TJ = 100°C
TJ = 25°C
481216
DRAIN–TO–SOURCE VOLTAGE (VOLTS)
Current versus Voltage
) is read from the capacitance curve at
iss
200
a voltage corresponding to the off–state condition when
calculating t
on–state when calculating t
and is read at a voltage corresponding to the
d(on)
.
d(off)
At high switching speeds, parasitic circuit elements
complicate the analysis. The inductance of the MOSFET
source lead, inside the package and in the circuit wiring
which is common to both the drain and gate current paths,
produces a voltage at the source which reduces the gate drive
current. The voltage is determined by Ldi/dt, but since di/dt
is a function of drain current, the mathematical solution is
complex. The MOSFET output capacitance also
complicates the mathematics. And finally, MOSFETs have
finite internal gate resistance which effectively adds to the
resistance of the driving source, but the internal resistance
is difficult to measure and, consequently, is not specified.
The resistive switching time variation versus gate
resistance (Figure 9) shows how typical switching
performance is affected by the parasitic circuit elements. If
the parasitics were not present, the slope of the curves would
maintain a value of unity regardless of the switching speed.
The circuit used to obtain the data is constructed to minimize
common inductance in the drain and gate circuit loops and
is believed readily achievable with board mounted
components. Most power electronic loads are inductive; the
data in the figure is taken with a resistive load, which
approximates an optimally snubbed inductive load. Power
MOSFETs may be safely operated into an inductive load;
however, snubbing reduces switching losses.
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6
2500
,
2000
VDS = 0 V VGS = 0 V
C
iss
NTMD2C02R2
N–ChannelP–Channel
1500
TJ = 25°C
1200
C
iss
VDS = 0 VVGS = 0 V
TJ = 25°C
1500
C
rss
1000
C, CAPACITANCE (pF)
500
C
rss
0
1005105
V
V
DS
GS
GATE–TO–SOURCE OR DRAIN–TO–SOURCE
VOLTAGE (VOLTS)
Figure 7. Capacitance Variation
, GATE–TO–SOURCE VOLTAGE (VOLTS)
GS
V
5
4
V
DS
3
Q1
2
1
0
0
QT
V
GS
ID = 6 A
V
Q2
4816
DS
V
GS
T
= 25°C
J
12
= 16 V
= 4.5 V
Qg, TOTAL GATE CHARGE (nC)
Figure 8. Gate–To–Source and Drain–To–Source
Voltage versus Total Charge
C
iss
C
oss
1520
20
16
12
8
4
0
900
C
rss
600
C, CAPACITANCE (pF)
300
0
5051015
–V
–V
GATE–TO–SOURCE OR DRAIN–TO–SOURCE
DS
GS
VOLTAGE (VOLTS)
Figure 7. Capacitance Variation
5
QT
4
, DRAIN–TO–SOURCE VOLTAGE (VOLTS)
DS
V
3
2
1
GATE–TO–SOURCE VOLTAGE (VOLTS)
0
GS,
–V
Q1
Q2
V
DS
2461014
Q
, TOTAL GATE CHARGE (nC)
g
V
GS
ID = –2.4 A
80
Figure 8. Gate–To–Source and Drain–To–Source
Voltage versus Total Charge
T
J
C
C
= 25°C
12
C
iss
oss
rss
2010
20
18
16
14
12
10
8
6
4
2
0
DRAIN–TO–SOURCE VOLTAGE (VOLTS)
DS
–V
1000
VDS = 16 V
I
= 4.0 A
D
= 4.5 V
V
GS
100
t
t
d(off)
t
d(on)
f
t
r
t, TIME (ns)
10
110100
RG, GATE RESISTANCE (OHMS)
Figure 9. Resistive Switching Time
Variation versus Gate Resistance
1000
100
t, TIME (ns)
10
1.0
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7
VDD = –10 V
= –1.2 A
I
D
VGS = –2.7 V
t
r
t
d (off)
t
d (on)
R
GATE RESISTANCE (OHMS)
G,
Figure 9. Resistive Switching Time
Variation versus Gate Resistance
t
f
10010
NTMD2C02R2
DRAIN–TO–SOURCE DIODE CHARACTERISTICS
The switching characteristics of a MOSFET body diode
are very important in systems using it as a freewheeling or
commutating diode. Of particular interest are the reverse
recovery characteristics which play a major role in
determining switching losses, radiated noise, EMI and RFI.
System switching losses are largely due to the nature of
the body diode itself. The body diode is a minority carrier
device, therefore it has a finite reverse recovery time, t
to the storage of minority carrier charge, Q
, as shown in
RR
, due
rr
the typical reverse recovery wave form of Figure 14. It is this
stored charge that, when cleared from the diode, passes
through a potential and defines an energy loss. Obviously,
repeatedly forcing the diode through reverse recovery
further increases switching losses. Therefore, one would
like a diode with short t
and low QRR specifications to
rr
minimize these losses.
The abruptness of diode reverse recovery effects the
amount of radiated noise, voltage spikes, and current
ringing. The mechanisms at work are finite irremovable
circuit parasitic inductances and capacitances acted upon by
N–ChannelP–Channel
5
VGS = 0 V
T
= 25°C
4
J
high di/dts. The diode’s negative di/dt during t
is directly
a
controlled by the device clearing the stored charge.
However, the positive di/dt during tb is an uncontrollable
diode characteristic and is usually the culprit that induces
current ringing. Therefore, when comparing diodes, the
ratio of t
serves as a good indicator of recovery
b/ta
abruptness and thus gives a comparative estimate of
probable noise generated. A ratio of 1 is considered ideal and
values less than 0.5 are considered snappy.
Compared to ON Semiconductor standard cell density
low voltage MOSFETs, high cell density MOSFET diodes
are faster (shorter t
), have less stored charge and a softer
rr
reverse recovery characteristic. The softness advantage of
the high cell density diode means they can be forced through
reverse recovery at a higher di/dt than a standard cell
MOSFET diode without increasing the current ringing or the
noise generated. In addition, power dissipation incurred
from switching the diode will be less due to the shorter
recovery time and lower switching losses.
2
VGS = 0 V
T
= 25°C
1.6
J
3
2
1
, SOURCE CURRENT (AMPS)
S
I
0
00.20.40.6
V
, SOURCE–TO–DRAIN VOLTAGE (VOLTS)
SD
0.81.0
1.2
1.2
0.8
SOURCE CURRENT (AMPS)
0.4
S,
–I
0
SOURCE–TO–DRAIN VOLTAGE (VOLTS)
–V
SD,
Figure 10. Diode Forward Voltage versus CurrentFigure 10. Diode Forward Voltage versus Current
0.90.80.70.60.50.4
1
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8
NTMD2C02R2
di/dt = 300 A/µs
, SOURCE CURRENT
S
I
Figure 11. Reverse Recovery Time (trr)
SAFE OPERATING AREA
The Forward Biased Safe Operating Area curves define
the maximum simultaneous drain–to–source voltage and
drain current that a transistor can handle safely when it is
forward biased. Curves are based upon maximum peak
junction temperature and a case temperature (T
) of 25°C.
C
Peak repetitive pulsed power limits are determined by using
the thermal response data in conjunction with the procedures
discussed in AN569, “Transient Thermal Resistance –
General Data and Its Use.”
Switching between the off–state and the on–state may
traverse any load line provided neither rated peak current
(I
) nor rated voltage (V
DM
) is exceeded, and that the
DSS
transition time (tr, tf) does not exceed 10 µs. In addition the
Standard Cell Density
t
rr
High Cell Density
t
rr
t
b
t
a
t, TIME
total power averaged over a complete switching cycle must
not exceed (T
J(MAX)
– TC)/(R
).
JC
θ
A power MOSFET designated E–FET can be safely used
in switching circuits with unclamped inductive loads. For
reliable operation, the stored energy from circuit inductance
dissipated in the transistor while in avalanche must be less
than the rated limit and must be adjusted for operating
conditions differing from those specified. Although industry
practice is to rate in terms of energy, avalanche energy
capability is not a constant. The energy rating decreases
non–linearly with an increase of peak current in avalanche
and peak junction temperature.
N–ChannelP–Channel
100
VGS = 20 V
10
, DRAIN CURRENT (AMPS)
0.1
D
I
0.01
SINGLE PULSE
T
= 25°C
C
10 ms
1
Mounted on 2″ sq. FR4 board (1″ sq. 2 oz. Cu 0.06″
thick single sided) with one die operating, 10s max.
0.1
, DRAIN–TO–SOURCE VOLTAGE (VOLTS)
V
DS
dc
R
LIMIT
DS(on)
THERMAL LIMIT
PACKAGE LIMIT
1
100 µs
1 ms
Figure 12. Maximum Rated Forward Biased
Safe Operating Area
10
10 µs
100
100
10
, DRAIN CURRENT (AMPS)
0.1
D
I
0.01
VGS = 8 V
SINGLE PULSE
T
= 25°C
C
1
0.1
V
, DRAIN–TO–SOURCE VOLTAGE (VOLTS)
DS
Mounted on 2″ sq. FR4 board (1″ sq. 2 oz. Cu 0.06″
thick single sided) with one die operating, 10s max.
1 ms
10 ms
dc
R
LIMIT
DS(on)
THERMAL LIMIT
PACKAGE LIMIT
1
10
Figure 12. Maximum Rated Forward Biased
Safe Operating Area
100
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9
NTMD2C02R2
TYPICAL ELECTRICAL CHARACTERISTICS
10
1
D = 0.5
0.2
0.1
THERMAL RESISTANCE
0.01
Rthja(t), EFFECTIVE TRANSIENT
0.1
0.05
0.02
0.01
Normalized to θja at 10s.
0.0175 Ω0.0710 Ω0.2706 Ω0.5776 Ω0.7086 Ω
Chip
SINGLE PULSE
0.001
1.0E-051.0E-041.0E-031.0E-021.0E-011.0E+001.0E+01
t, TIME (s)
Figure 13. Thermal Response
di/dt
I
S
t
rr
t
t
a
b
t
p
0.25 I
S
I
S
TIME
107.55 F1.7891 F0.3074 F0.0854 F0.0154 F
Ambient
1.0E+021.0E+03
Figure 14. Diode Reverse Recovery Waveform
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NTMD2C02R2
INFORMATION FOR USING THE SO–8 SURFACE MOUNT PACKAGE
MINIMUM RECOMMENDED FOOTPRINT FOR SURFACE MOUNTED APPLICATIONS
Surface mount board layout is a c ritical p ortion o f t he total
design. The footprint for the semiconductor packages must
be the correct size to ensure proper solder connection
0.275
7.0
0.024
0.6
SO–8 POWER DISSIPATION
The power dissipation of the SO–8 is a function of the
input pad size. This can vary from the minimum pad size
for soldering to the pad size given for maximum power
dissipation. Power dissipation for a surface mount device is
determined by T
temperature of the die, R
, the maximum rated junction
J(max)
, the thermal resistance from
JA
θ
the device junction to ambient; and the operating
temperature, T
. Using the values provided on the data
A
sheet for the SO–8 package, PD can be calculated as
follows:
PD =
J(max)
A
R
θ
JA
– T
T
The values for the equation are found in the maximum
ratings table on the data sheet. Substituting these values
interface between the board and the package. With the
correct pad geometry, the packages will self–align when
subjected to a solder reflow process.
0.060
1.52
0.155
4.0
0.050
1.270
inches
mm
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 2.0 Watts.
150°C – 25°C
PD =
62.5°C/W
= 2.0 Watts
The 62.5°C/W for the SO–8 package assumes the
recommended footprint on a glass epoxy printed circuit
board to achieve a power dissipation of 2.0 Watts using the
footprint shown. Another alternative would be to use a
ceramic substrate or an aluminum core board such as
Thermal Clad. Using board material such as Thermal
Clad, 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.
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• 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.
11
NTMD2C02R2
TYPICAL SOLDER HEATING PROFILE
For any given circuit board, there will be a group of
control settings that will give the desired heat pattern. The
operator must set temperatures for several heating zones
and a figure for belt speed. Taken together, these control
settings make up a heating “profile” for that particular
circuit board. On machines controlled by a computer, the
computer remembers these profiles from one operating
session to the next. Figure 15 shows a typical heating
profile for use when soldering a surface mount device to a
printed circuit board. This profile will vary among
soldering systems, but it is a good starting point. Factors
that can affect the profile include the type of soldering
system in use, density and types of components on the
board, type of solder used, and the type of board or
substrate material being used. This profile shows
200°C
150°C
100°C
STEP 1
PREHEAT
ZONE 1
“RAMP”
DESIRED CURVE FOR HIGH
STEP 2
VENT
“SOAK”
MASS ASSEMBLIES
150°C
100°C
HEATING
ZONES 2 & 5
STEP 3
“RAMP”
temperature versus time. The line on the graph shows the
actual temperature that might be experienced on the surface
of a test board at or near a central solder joint. The two
profiles are based on a high density and a low density
board. The Vitronics SMD310 convection/infrared reflow
soldering system was used to generate this profile. The type
of solder used was 62/36/2 Tin Lead Silver with a melting
point between 177–189°C. When this type of furnace is
used for solder reflow work, the circuit boards and solder
joints tend to heat first. The components on the board are
then heated by conduction. The circuit board, because it has
a large surface area, absorbs the thermal energy more
efficiently, then distributes this energy to the components.
Because of this effect, the main body of a component may
be up to 30 degrees cooler than the adjacent solder joints.
STEP 4
HEATING
ZONES 3 & 6
“SOAK”
160°C
140°C
STEP 5
HEATING
ZONES 4 & 7
“SPIKE”
170°C
SOLDER IS LIQUID FOR
40 TO 80 SECONDS
(DEPENDING ON
MASS OF ASSEMBLY)
STEP 6
VENT
STEP 7
COOLING
205° TO 219°C
PEAK AT
SOLDER
JOINT
5°C
DESIRED CURVE FOR LOW
MASS ASSEMBLIES
TIME (3 TO 7 MINUTES TOTAL)T
Figure 15. Typical Solder Heating Profile
MAX
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12
–Y–
–Z–
NTMD2C02R2
PACKAGE DIMENSIONS
SO–8
CASE 751–07
ISSUE AA
NOTES:
–X–
A
58
B
1
S
0.25 (0.010)
4
M
M
Y
K
G
C
SEATING
PLANE
0.10 (0.004)
H
D
0.25 (0.010)Z
M
Y
SXS
N
X 45
M
1. DIMENSIONING AND TOLERANCING PER ANSI
Y14.5M, 1982.
2. CONTROLLING DIMENSION: MILLIMETER.
3. DIMENSION A AND B DO NOT INCLUDE MOLD
PROTRUSION.
4. MAXIMUM MOLD PROTRUSION 0.15 (0.006) PER
SIDE.
5. DIMENSION D DOES NOT INCLUDE DAMBAR
PROTRUSION. ALLOWABLE DAMBAR
PROTRUSION SHALL BE 0.127 (0.005) TOTAL IN
EXCESS OF THE D DIMENSION AT MAXIMUM
MATERIAL CONDITION.
6. 751-01 THRU 751-06 ARE OBSOLETE. NEW
STANDAARD IS 751-07
MiniMOS is a trademark of Semiconductor Components Industries, LLC (SCILLC).
Thermal Clad is a registered trademark of the Bergquist Company.
ON Semiconductor and are registered trademarks of Semiconductor Components Industries, LLC (SCILLC). SCILLC reserves the right to make
changes without further notice to any products herein. SCILLC makes no warranty, representation or guarantee regarding the suitability of its products for any
particular purpose, nor does SCILLC assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all
liability, including without limitation special, consequential or incidental damages. “Typical” parameters which may be provided in SCILLC data sheets and/or
specifications can and do vary in different applications and actual performance may vary over time. All operating parameters, including “Typicals” must be
validated for each customer application by customer’s technical experts. SCILLC does not convey any license under its patent rights nor the rights of others.
SCILLC products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body, or other applications
intended to support or sustain life, or for any other application in which the failure of the SCILLC product could create a situation where personal injury or death
may occur. Should Buyer purchase or use SCILLC products for any such unintended or unauthorized application, Buyer shall indemnify and hold SCILLC
and its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees
arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized use, even if such claim alleges that
SCILLC was negligent regarding the design or manufacture of the part. SCILLC is an Equal Opportunity/Affirmative Action Employer.
PUBLICATION ORDERING INFORMATION
Literature Fulfillment:
Literature Distribution Center for ON Semiconductor
P.O. Box 5163, Denver, Colorado 80217 USA
Phone: 303–675–2175 or 800–344–3860 Toll Free USA/Canada
Fax: 303–675–2176 or 800–344–3867Toll Free USA/Canada
Email: ONlit@hibbertco.com
N. American Technical Support: 800–282–9855 Toll Free USA/Canada
http://onsemi.com
JAPAN: ON Semiconductor, Japan Customer Focus Center
2–9–1 Kamimeguro, Meguro–ku, Tokyo, Japan 153–0051
Phone: 81–3–5773–3850
Email: r14525@onsemi.com
ON Semiconductor Website: http://onsemi.com
For additional information, please contact your local
Sales Representative.
NTMD2C02R2/D
16
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