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580 Pleasant St.
Watertown, MA 02472
PH: (617) 926-0404
FAX: (617) 924-1235
SURFACE MOUNT
1A SCHOTTKY RECTIFIER
POWERMITE Power Surface Mount Package
Features:
• Low Profile -- Maximum Height of 1.1 mm
• Small Footprint -- Footprint Area of 8.45 mm
• Low VF Provides Higher Efficiency and Extends Battery Life
• Supplied in 12 mm Tape and Reel -- 12,000 Units per Reel
• Low Thermal Resistance with Direct Thermal Path of Die on Exposed
Cathode Heat Sink
2
Mechanical Characteristics:
• Powermite is JEDEC Registered as DO-216AA
• Case: Molded Epoxy
• Epoxy Meets UL94, VO at 1/8"
• Weight: 62 mg (appoximately)
• Device Marking: S20
• Lead and Mounting Surface Temperature for Soldering Purposes,
• 260°C Maximum for 10 Seconds
UPS120
SCHOTTKY BARRIER
RECTIFIER
1.0 AMPERES
20 VOLTS
Description:
The UPS120 Powermite Schottky rectifier is designed to offer optimized forward voltage characteristics for
battery powered portable products such as cellular and cordless phones, chargers, notebook computers,
printers, PDA's and PCMCIA cards. Typical applications include ac/dc and dc-dc converters, reverse battery
protection and "Oring" of multiple supply voltages.
The Powermite's patented heat sink design offers the same thermal performance rating as an SMA while being
50% smaller in footprint area and less than 1 mm in overall height. The result is a unique, highly efficient
Schottky rectifier in a space saving surface mount package.
Maximum Ratings
RATING SYMBOL VALUE UNIT
Peak Repetitive Reverse Voltage
Working Peak Reverse Voltage
DC Blocking Voltage
Average Rectified Forward Current (At Rated VR, TC = 135°C)
Peak Repetitive Forward Current
(At Rated VR, Square Wave, 100 KHz, TC = 135°C
Non-Repetitive Peak Surge Current
(Non-Repetitive peak surge current, halfwave, single phase, 60 Hz)
Storage / Operating Case Temperature T
Operating Junction Temperature T
Voltage Rate of Change (Rated VR, TJ = 25°C)
Thermal Characteristics
Thermal Resistance - Junction-to-Lead (Anode) (1}
Thermal Resistance - Junction-to-Tab (Cathode) (1}
Thermal Resistance - Junction-to-Ambient (1}
(1) Pulse Test: Pulse Width ≤ 250 µs, Duty Cycle ≤ 2%.
V
RRM
V
RWM
V
R
I
O
I
FRM
I
FSM
stg, TC
J
dv/dt 10,000
Rtji
Rtjtab
Rtja
20 V
1.0 A
2.0 A
50
-55 to 150
-55 to 125
35
15
248
A
°C
°C
V/µs
°C/W
MSC0889.PDF 07-31-98
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Electrical Characteristics
Maximum Instantaneous Forward Voltage (1), See Figure 2 V
(IF = 0.1 A)
(IF = 1.0 A)
(IF = 3.0 A)
Maximum Instantaneous Reverse Current, See Figure 4 I
(VR = 20 V)
(VR = 10 V)
(1) Pulse Test: Pulse Width ≤ 250 µs, Duty Cycle ≤ 2%.
MECHANICAL DIMENSIONS
UPS120
F
R
TJ = 25°C TJ = 85°C
0.34
0.45
0.65
0.25
0.415
0.67
TJ = 25°C TJ = 85°C
0.40
0.10
25
18
V
mA
MSC0889.PDF 07-31-98
Figure 1
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UPS120
UPS120 TYPICAL FORWARD VOLTAGE
1
10
0
10
If (A)
-1
150 ^oC
10
0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0
PRELIMINARY DATA
25 ^oC85 ^oC
Vf (V)
Figure 2 Figure 3
UPS120 TYPICAL LEAKAGE CURRENTS
5
10
4
10
3
10
Ir (uA)
2
10
1
10
0
10
0 5 10 15 20 25
PRELIMINARY DATA
Vr (V)
150 ^oC
85 ^oC
25 ^oC
MSC0889.PDF 07-31-98
Figure 4
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UPS120
Preliminary Data
Preliminary Data Preliminary Data
* Reverse power dissipation and the possibility of thermal runaway must be considered when operating this device under any reverse
voltage conditions. Calculations of TJ therefore must include forward and reverse power effects. The allowable operating TJ may be
calculated from the equation: TJ = T
This graph displays the derated allowable TJ due to reverse bias under DC conditions only and is calculated as T
Where r(t) = Rthja. For other power applications further calculations must be performed.
MSC0889.PDF 07-31-98
= r(t)(Pf + Pr) where
Jmax
r(t) = thermal impedance under given conditions.
Pf = forward power dissipation, and
Pr = reverse power dissipation
= T
J
J max
- r(t)Pr,
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UPS120
Preliminary Data
Preliminary Data
MSC0889.PDF 07-31-98
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