8920 ALLEGRO
Document overview
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Technical content
Schottky barrier diodes combine high rectification efficiency with high switching speeds and low series resistance. The A8920SLR dual- diode is designed specifically for hard-disk drive applications requiring low voltage drop rectification of the spindle motor back-EMF during power-down head retraction. It is supplied in a 3-lead small-outline transistor package (SOT-23/TO-236AB) for surface-mounting for use over the operating temperature range of -20°C to +85°C.
FEATURES
n Low Forward Voltage Drop 440 mV Typical at 150 mA n 500 mA Forward Current n 20 V Reverse Voltage 8920 DUAL SCHOTTKY DIODE Always order by complete part number:A8920SLR . ABSOLUTE MAXIMUM RATINGS at TA=+25°C Operating Temperature Range, Storage Temperature Range, TYPICAL APPLICATION Data Sheet 29801.10 Dwg. PD-002 Dwg. ED-002A VDD
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000 ELECTRICAL CHARACTERISTICS at TA= +25°C (unless otherwise specified). Limits Characteristic Symbol Test Conditions Min. Typ. Max. Units Reverse Breakdown Voltage V (BR) IR = 100 µA2 0 — — V Reverse Leakage Current I R VR = 10 V — 1.6 20 µA Forward Voltage V F IF = 50 mA — 346 400 mV IF = 150 mA — 440 500 mV Junction Capacitance C T VR = 0 V, f = 1 MHz — 370 — pF Reverse Recovery Time t rr IF = IR = 100 mA — 32 — ns TYPICAL CHARACTERISTICS W Copyright © 1991, 1995, Allegro MicroSystems, Inc. Allegro MicroSystems, Inc. reserves the right to make, from time to time, such departures from the detail specifications as may be required to permit improvements in the design of its products. The information included herein is believed to be accurate and reliable. However, Allegro MicroSystems, Inc. assumes no responsibil- ity for its use; nor for any infringements of patents or other rights of third parties which may result from its use. 0 5.0 10 1.0 3.0 REVERSE VOLTAGE IN VOLTS 0.1 Dwg. GD-004 REVERSE CURRENT IN mA 0.3 15 20 T = 0°CA T = +75°CA T = +25°CA 100 0.1 1.0 10 300 400 FORWARD CURRENT IN mA 500 100 Dwg. GD-003 FORWARD VOLTAGE IN mV 600 200 100 1 k TA = +25°C TA = 0°C TA = +75°C 50 75 100 125 150 100 ALLOWABLE PACKAGE POWER DISSIPATION IN mW AMBIENT TEMPERATURE IN °C 250 200 150 Dwg. GD-002 R = 575°C/WqJA