These Schottky diodes are specically designed for both
analog and digital applications. This series oers a wide
Features
• Surface Mount Packages
• High Breakdown Voltage
range of specications and package congurations to
give the designer wide exibility. The HSMS‑280x series
of diodes is optimized for high voltage applications.
Note that Avago’s manufacturing techniques assure that
dice found in pairs and quads are taken from adjacent sites
on the wafer, assuring the highest degree of match.
• Low FIT (Failure in Time) Rate*
• Six‑sigma Quality Level
• Single, Dual and Quad Versions
• Tape and Reel Options Available
• Lead‑free
* For more information see the Surface Mount Schottky Reliability
Data Sheet.
Package Lead Code Identication, SOT-323 (Top View)Package Lead Code Identication, SOT-363 (Top View)
Package Lead Code Identication, SOT-23/SOT-143 (Top View)
Page 2
Pin Connections and Package Marking, SOT-363
GUx
1
2
3
6
5
4
Notes:
1. Package marking provides orientation and identication.
2. See “Electrical Specications” for appropriate package marking.
ESD WARNING:
Handling Precautions Should Be Taken To Avoid Static Discharge.
Absolute Maximum Ratings
[1]
TC = 25°C
SymbolParameterUnitSOT-23/SOT-143SOT-323/SOT-363
I
f
P
IV
T
j
T
stg
θ
jc
Notes:
1. Operation in excess of any one of these conditions may result in permanent damage to the device.
2. TC = +25°C, where TC is dened to be the temperature at the package pins where contact is made to the circuit board.
Electrical Specications TA = 25°C, Single Diode
Part
Number
[4]
HSMS
2800A00Single
2802A22Series
2803A33Common Anode
2804A44Common Cathode
2805A55Unconnected Pair
2808A88Bridge Quad
280BA0BSingle
280CA2CSeries
280EA3ECommon Anode
280FA4FCommon Cathode
280KAKK
280LALLUnconnected Trio
280MHMCommon Cathode Quad
280NNNCommon Anode Quad
280PAPPBridge Quad
280RORRing Quad
Test ConditionsIR = 10 mAIF = 1 mAVF = 0 V
Notes:
1. DVF for diodes in pairs and quads in 15 mV maximum at 1 mA.
2. DCTO for diodes in pairs and quads is 0.2 pF maximum.
3. Eective Carrier Lifetime (t) for all these diodes is 100 ps maximum measured with Krakauer method at 5 mA.
4. See section titled “Quad Capacitance.”
5. RD = RS + 5.2 Ω at 25°C and If = 5 mA.
Forward Current (1 µs Pulse)Amp11
Peak Inverse VoltageVSame as V
BR
Junction Temperature°C150150
Storage Temperature°C-65 to 150-65 to 150
Thermal Resistance
[2]
°C/W500150
[3]
Package
Marking
Code
Lead
CodeConguration
High Isolation
Unconnected Pair
Minimum
Breakdown
Voltage
VBR (V)
[4]
704101.0 @ 15200 @ 502.035
Maximum
Forward
Voltage
VF (mV)
Maximum
Forward
Voltage
VF (V) @ IF (mA)
Maximum
Reverse
Leakage
IR (nA) @ VR (V)
Same as V
Maximum
Capacitance
CT (pF)
f = 1 MHz
BR
Typical
Dynamic
Resistance
[5]
RD (Ω)
IF = 5 mA
2
Page 3
Quad Capacitance
C
1
C
2
C
4
C
3
A
B
C
j
R
j
R
S
Rj =
8.33 X 10-5 nT
Ib + I
s
where
Ib = externally applied bias current in amps
Is = saturation current (see table of SPICE parameters)
T = temperature, °K
n = ideality factor (see table of SPICE parameters)
Note:
To effectively model the packaged HSMS-280x product,
please refer to Application Note AN1124.
RS = series resistance (see Table of SPICE parameters)
Cj = junction capacitance (see Table of SPICE parameters)
Capacitance of Schottky diode quads is measured using
an HP4271 LCR meter. This instrument eectively isolates
individual diode branches from the others, allowing
accurate capacitance measurement of each branch or
each diode. The conditions are: 20 mV R.M.S. voltage at 1
MHz. Avago denes this measurement as “CM”, and it is
equivalent to the capacitance of the diode by itself. The
equivalent diagonal and adjacent capacitances can then
be calculated by the formulas given below.
In a quad, the diagonal capacitance is the capacitance
between points A and B as shown in the gure below.
The diagonal capacitance is calculated using the follow‑
ing formula
C1 x C2 C3 x C
C
DIAGONAL
= _______ + _______
C1 + C2 C3 + C
4
4
The equivalent adjacent capacitance is the capacitance
between points A and C in the gure below. This capaci‑
tance is calculated using the following formula
1
C
ADJACENT
1 1 1
–– + –– + ––
C2 C3 C
= C1 + ____________
4
This information does not apply to cross‑over quad
diodes.
Linear Equivalent Circuit, Diode Chip
SPICE Parameters
ParameterUnitsHSMS-280x
B
V
C
J0
E
G
I
BV
I
S
N1.08
R
S
P
B
P
T
M0.5
V75
pF1.6
eV0.69
AE‑5
A3.00E‑08
Ω30
V0.65
2
3
Page 4
Typical Performance, TC = 25°C (unless otherwise noted), Single Diode
0 0.10.30.20.5 0.60.40.80.70.9
I
F
– FORWARD CURRENT (mA)
VF – FORWARD VOLTAGE (V)
Figure 1. Forward Current vs. Forward Voltage
at Temperatures.
0.01
10
1
0.1
100
TA = +125C
T
A
= +75C
T
A
= +25C
T
A
= –25C
Figure 2. Reverse Current vs. Reverse Voltage
at Temperatures.
01020305040
I
R
– REVERSE CURRENT (nA)
VR – REVERSE VOLTAGE (V)
1
1000
100
10
100,000
10,000
TA = +125C
T
A
= +75C
T
A
= +25C
Figure 3. Dynamic Resistance vs. Forward
Current.
0.11100
R
D
– DYNAMIC RESISTANCE ()
IF – FORWARD CURRENT (mA)
10
1
10
1000
100
Figure 4. Total Capacitance vs. Reverse
Voltage.
01020305040
C
T
– CAPACITANCE (pF)
VR – REVERSE VOLTAGE (V)
0
1.5
1
0.5
2
VF - FORWARD VOLTAGE (V)
Figure 5. Typical Vf Match, Pairs and Quads.
30
10
1
0.3
30
10
1
0.3
I
F
- FORWARD CURRENT (mA)
V
F
- FORWARD VOLTAGE DIFFERENCE (mV)
0.2 0.40.60.81.01.21.4
IF (Left Scale)
VF (Right Scale)
4
Page 5
Applications Information Introduction —
0.026
0.039
0.079
0.022
Dimensions in inches
0.026
0.079
0.018
0.039
Dimensions in inches
Product Selection
Avago’s family of Schottky products provides unique
solutions to many design problems.
The rst step in choosing the right product is to select the
diode type. All of the products in the HSMS‑280x family
use the same diode chip, and the same is true of the
HSMS‑281x and HSMS‑282x families. Each family has a dif‑
ferent set of characteristics which can be compared most
easily by consulting the SPICE parameters in Table 1.
A review of these data shows that the HSMS‑280x family
has the highest breakdown voltage, but at the expense of
a high value of series resistance (Rs). In applications which
do not require high voltage the HSMS‑282x family, with a
lower value of series resistance, will oer higher current
carrying capacity and better performance. The HSMS‑281x
family is a hybrid Schottky (as is the HSMS‑280x), oering
lower 1/f or icker noise than the HSMS‑282x family.
In general, the HSMS‑282x family should be the designer’s
rst choice, with the ‑280x family reserved for high voltage
applications and the HSMS‑281x family for low icker
noise applications.
Figure 6. Recommended PCB Pad Layout for Avago’s SC70 3L/SOT-323
Products.
Assembly Instructions
SOT-363 PCB Footprint
A recommended PCB pad layout for the miniature SOT‑
363 (SC‑70, 6 lead) package is shown in Figure 7 (dimen‑
sions are in inches). This layout provides ample allowance
for package placement by automated assembly equip‑
ment without adding parasitics that could impair the
performance.
Assembly Instructions
SOT-323 PCB Footprint
A recommended PCB pad layout for the miniature SOT‑
323 (SC‑70) package is shown in Figure 6 (dimensions
are in inches). This layout provides ample allowance for
package placement by automated assembly equipment
without adding parasitics that could impair the perfor‑
mance.
Table 1. Typical SPICE Parameters
ParameterUnitsHSMS-280xHSMS-281xHSMS-282x
B
V
C
J0
E
G
I
BV
I
S
N1.081.081.08
R
S
PB (VJ)V0.650.650.65
PT (XTI)222
M0.50.50.5
5
V752515
pF1.61.10.7
eV0.690.690.69
A1 E‑51 E‑51 E‑4
A3 E‑84.8 E‑92.2 E‑8
Ω30106
Figure 7. Recommended PCB Pad Layout for Avago’s SC70 6L/SOT-363
Products.
Page 6
25
Time
Temperature
Tp
T
L
tp
t
L
t 25° C to Peak
Ramp-up
ts
Ts
min
Ramp-down
Preheat
Critical Zone
T
L
to Tp
Ts
max
SMT Assembly
Reliable assembly of surface mount components is a
complex process that involves many material, process, and
equipment factors, including: method of heating (e.g., IR
or vapor phase reow, wave soldering, etc.) circuit board
material, conductor thickness and pattern, type of solder
alloy, and the thermal conductivity and thermal mass of
components. Components with a low mass, such as the
SOT package, will reach solder reow temperatures faster
than those with a greater mass.
Avago’s SOT diodes have been qualied to the time‑
temperature prole shown in Figure 8. This prole is
representative of an IR reow type of surface mount as‑
sembly process.
After ramping up from room temperature, the circuit
board with components attached to it (held in place
with solder paste) passes through one or more preheat
zones. The preheat zones increase the temperature of the
board and components to prevent thermal shock and
begin evaporating solvents from the solder paste. The
reow zone briey elevates the temperature suciently
to produce a reow of the solder.
The rates of change of temperature for the ramp‑up and
cool‑down zones are chosen to be low enough to not
cause deformation of the board or damage to compo‑
nents due to thermal shock. The maximum temperature
in the reow zone (T
) should not exceed 260°C.
MAX
These parameters are typical for a surface mount assem‑
bly process for Avago diodes. As a general guideline, the
circuit board and components should be exposed only
to the minimum temperatures and times necessary to
achieve a uniform reow of solder.