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ESDA18-1F2
Transient Voltage Suppressor
1/7
ESDA18-1F2TRANSIL™: Transient Voltage Suppressor
REV. 1May 2005
Figure 1: Pin Configuration (ball side)
Table 1: Order Code
FEATURES AND BENEFITS: Stand-off voltage 16V Unidirectional device Low clamping factor VCL/VBR Fast response time Very thin package: 0.65 mm
DESCRIPTIONThe ESDA18-1F2 is a single line Transil diode
designed specifically for the protection of
integrated circuits into portable equipment and
miniaturized electronics devices subject to ESD &
EOS transient overvoltages.
COMPLIES WITH THE FOLLOWING STANDARDS:
IEC61000-4-2Level 4 15kV (air discharge)
8kV (contact discharge)
ASD
(Application Specific Devices)
TM: TRANSIL is a trademark of STMicroelectronics.
ESDA18-1F2
Table 2: Absolute Ratings (limiting value, per diode)
Table 3: Electrical Characteristics (T amb = 25°C)
(1) 8 / 20 µs pulse waveform.
(2) DC current not recommended for more than 5 sec. Even if Transil failure mode is short circuit the bumps could exceed melting temper-ature and the component disassembled from the board.
ESDA18-1F23/7
Figure 2: Relative variation of peak pulse
power versus initial junction temperature
Figure 3: Peak pulse power versus exponen-
tial pulse duration
Figure 4: Clamping voltage versus peak pulse
current (typical values, exponential waveform)
Figure 5: Forward voltage drop versus peak
forward current (typical values)
Figure 6: Junction capacitance versus reverse
voltage applied (typical values)
Figure 7: Relative variation of leakage current
versus junction temperature (typical values)
ESDA18-1F2One major point is that the ESDA18-1F2 has to ensure the safety during reverse battery operation. Indeed,
during this operation the device must clamp the DC reverse voltage below 1.3V @ 0.85A (max current).
Thus reverse battery operation has been simulated by inverting the polatrity of the TRANSIL (please see
figures 8 and 9)
Figure 8: Reverse battery operation setup
Figure 9: Reverse battery operation resultsA short calculation based on Reverse battery operation results figures clearly show that in such real phone
application the ESDA18-1F2 clamp the DC voltage below 1.3V.
Typically the ESDA18-1F2 can clamp the DC voltage @ 0.9V @0.76A DC current:DC max×----------------------- 21.4×
3.14----------------- 0.9V≈≈=DC max×--------------------- 21.2×
3.14----------------- 0.76A≈≈=
ESDA18-1F25/7
Figure 10: Ordering Information Scheme
Figure 12: Foot Print Recommendations Figure 13: Marking
ESDA18-1F2
Figure 14: FLIP-CHIP Tape and Reel Specification
Table 4: Ordering Information
Note: More packing informations are available in the application noteAN1235: “Flip-Chip: Package description and recommendations for use”
Table 5: Revision History
