Data Sheet 29801.10 8920 DUAL SCHOTTKY DIODE 1 3 Schottky barrier diodes combine high rectification efficiency with high switching speeds and low series resistance. The A8920SLR dualdiode 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 2 Dwg. PD-002 ■ Low Forward Voltage Drop 440 mV Typical at 150 mA ■ 500 mA Forward Current ■ 20 V Reverse Voltage TYPICAL APPLICATION VDD Dwg. ED-002A ABSOLUTE MAXIMUM RATINGS at TA =+25°C Forward Current, IF .......................... 500 mA Reverse Voltage, V R .............................. 20 V Operating Temperature Range, TA .................................. -20 °C to +85°C Storage Temperature Range, TS ................................ -65°C to +150°C Always order by complete part number: A8920SLR . 8920 DUAL SCHOTTKY DIODE ELECTRICAL CHARACTERISTICS at TA= +25°C (unless otherwise specified). Limits Characteristic Symbol Reverse Breakdown Voltage Test Conditions V(BR) Min. Typ. Max. Units IR = 100 µA 20 — — V Reverse Leakage Current IR VR = 10 V — 1.6 20 µA Forward Voltage VF IF = 50 mA — 346 400 mV IF = 150 mA — 440 500 mV Junction Capacitance CT VR = 0 V, f = 1 MHz — 370 — pF Reverse Recovery Time trr IF = IR = 100 mA — 32 — ns TYPICAL CHARACTERISTICS FORWARD VOLTAGE IN mV 500 400 300 TA = +25°C TA = 0°C 200 TA = +75°C 100 0.1 1.0 10 100 1k FORWARD CURRENT IN mA Dwg. GD-003 100 TA = +75°C 250 200 R θJA = 575°C/W 150 100 50 0 25 30 REVERSE CURRENT IN µA ALLOWABLE PACKAGE POWER DISSIPATION IN mW 600 50 75 100 125 AMBIENT TEMPERATURE IN °C 150 Dwg. GD-002 10 3.0 TA = +25°C 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. 1.0 0.3 The information included herein is believed to be accurate and reliable. However, Allegro MicroSystems, Inc. assumes no responsibility for its use; nor for any infringements of patents or other rights of third parties which may result from its use. TA = 0°C 0.1 0 5.0 10 15 20 REVERSE VOLTAGE IN VOLTS Dwg. GD-004 115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 W Copyright © 1991, 1995, Allegro MicroSystems, Inc.