Diodes PAM2861 - Manual (Page 9)

PAM2861
Document number: DSxxxxx Rev. 1 - 1
9 of 12
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July 2013
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PAM2861
A Product Line of
Diodes Incorporated
Application Information
(cont.)
Diode Selection
For maximum efficiency and performance, the rectifier (D1) should be a fast low capacitance Schottky diode with low reverse leakage at the
maximum operating voltage and temperature. They also provide better efficiency than silicon diodes, due to a combination of lower forward
voltage and reduced recovery time.
It is important to select parts with a peak current rating above the peak coil current and a continuous current rating higher than the maximum
output load current. It is very important to consider the reverse leakage of the diode when operating above +85°C. Excess leakage will increase
the power dissipation in the device and if close to the load may create a thermal runaway condition.
The higher forward voltage and overshoot due to reverse recovery time in silicon diodes will increase the peak voltage on the LX output. If a
silicon diode is used, care should be taken to ensure that the total voltage appearing on the LX pin including supply ripple, does not exceed the
specified maximum value.
Ordering Information
Part Number Part Marking Package Type Standard Package
PAM2861ABR EQXYW TSOT25 3000 Units/ Tape&Reel
PAM2861CBR
P2861
XXXYW
SOT89-5 1000 Units/ Tape&Reel
Marking Information
Top View
TSOT25