A8184SLT

8184 ALLEGRO

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Technical content

— FOR REFERENCE ONLY Data Sheet27468.6A Designed specifically to meet the requirement for extended opera- tion of battery-powered equipment such as cordless and cellular telephones, the A8184SLT voltage regulator offers the reduced dropout voltage and quiescent current essential for maximum battery life. Applicable also to palmtop computers and personal data assistants, the device delivers a regulated, continuous 3 V output at up to 75 mA under normal operating conditions, or to 150 mA (transient) under worst-case conditions. A PMOS pass element provides a typical dropout voltage of only 90 mV at 60 mA of load current. The low dropout voltage permits deeper battery discharge before output regulation is lost. Furthermore, quiescent current does not increase as the dropout voltage is ap- proached, an ideal feature in standby/resume power systems where data integrity is crucial. Regulator accuracy and excellent temperature characteristics are provided by a bandgap reference. This device is supplied in a small-outline plastic transistor package (SOT-89/TO-243AA) for surface-mount applications. The A8184SLT is rated for operation over a temperature range of -20°C to +85°C. A similar device with an ENABLE input for control over sequential power up, standby, or power down is the A8183SLU. FEATURES AND BENEFITS I High Efficiency Provides Extended Battery Life I 90 mV Typical Dropout Voltage at IO = 60 mA I 45 µA Typical Quiescent Current at VI = 6 V I Up to 150 mA Output Current I Internal Thermal Protection I Surface-Mount Package

APPLICATIONS

I Cordless and Cellular Telephones I Personal Data Assistants I Personal Communicators I Palmtop Computers Dwg. PS-022 VR 3 V 2 31 GND OUT IN LOW-DROPOUT, 3 V REGULATOR — HIGH EFFICIENCY Always order by complete part number: A8184SLT . ABSOLUTE MAXIMUM RATINGS Operating Temperature Range, Junction Temperature, TJ . . . +150°C† Storage Temperature Range, * Output current rating is limited by input voltage, duty cycle, and ambient temperature. Under any set of conditions, do not exceed a junction temperature of +150°C. See next page. † Fault conditions that produce excessive junction temperature will activate device thermal shutdown circuitry. These conditions can be tolerated but should be avoided. 8184

LOW-DROPOUT,

3 V REGULATOR

115 Northeast Cutoff, Box 15036

Worcester, Massachusetts 01615-0036 (508) 853-5000 FUNCTIONAL BLOCK DIAGRAM Dwg. FS-012-4 BIAS DRIVE THERMAL PROTECT. BANDGAP REF. ERROR AMP TAB IN 1 OUT3 GND 2 MAXIMUM ALLOWABLE OUTPUT CURRENT with device mounted on 2.24" x 2.24" (56.9 mm x 56.9 mm) solder-coated copper-clad board in still air. Maximum Allowable Output Current in Milliamperes with VI = 8 V, TJ = 150°C, Period ≤10 s* dc (Duty Cycle) TA 100% 90% 80% 70% 60% 50% 40% 30% 20% 25°C 95 105 120 135 150 150 150 150 150 50°C 75 85 95 110 125 150 150 150 150 70°C 60 65 75 85 100 120 150 150 150 85°C 50 55 60 70 80 100 125 150 150 *I O = (TJ - TA)/([VI - VO] RθJA • dc) = (150 - TA)/(5 • 258 • dc) Output current rating can be increased (to 150 mA maximum) by heat sinking or reducing the input voltage. Conditions that produce excessive junction temperature will activate device thermal shutdown circuitry. These conditions can be tolerated but should be avoided. Copyright © 1994, 2000, Allegro MicroSystems, Inc.

LOW-DROPOUT, ELECTRICAL CHARACTERISTICS at TA = +25°C (unless otherwise noted). Limits Characteristic Symbol Test Conditions Min. Typ. Max. Units Output Voltage V O 4 V ≤ VI ≤ 8 V, T A = +25°C 2.95 3.00 3.05 V 10 µA ≤ IO ≤ 100 mA* -20 °C ≤ TA ≤ +85°C 2.90 3.00 3.10 V Output Volt. Temp. Coeff. αVO VI = 6 V, IO = 10 mA — — ±1.0 mV/ °C Line Regulation ∆VO(∆VI) 6 V ≤ VI ≤ 8 V, IO = 1 mA — 4.0 10 mV 4 V ≤ VI ≤ 6 V, IO = 1 mA — 9.5 18 mV Load Regulation ∆VO(∆IO) 1 mA ≤ IO ≤ 100 mA*, VI = 8 V — 19 30 mV 1 mA ≤ IO ≤ 100 mA*, VI = 6 V — 14 25 mV 1 mA ≤ IO ≤ 100 mA*, VI = 4 V — 8.0 20 mV Dropout Voltage V Imin - VO IO = 60 mA* — 90 150 mV IO = 125 mA* — 190 300 mV Quiescent Current I Q VI = 6 V, 1 mA ≤ IO ≤ 100 mA*, VE ≥ 2.0 V — 45 60 µA (GND terminal current) V I = 8 V, 1 mA ≤ IO ≤ 100 mA*, VE ≥ 2.0 V — 50 65 µA Thermal Shutdown Temp. T J 150 — — °C Thermal Resistance R θJA Mounted on 2.24" x 2.24" solder-coated — 258 — °C/W copper-clad board in still air Typical values are at TA = +25°C and are given for circuit design information only. * Pulse test (≤20 ms). See previous page for duty cycle limitations.

LOW-DROPOUT, Worcester, Massachusetts 01615-0036 (508) 853-5000 TYPICAL CHARACTERISTICS LOAD REGULATION LINE REGULATION 2.0 Dwg. GP-053-3 T = -20°C 50 mA INTERVALS A3.04 3.00 3.02 2.98 OUTPUT VOLTAGE in VOLTS 2.96 2.94 3.06 2.92 I = 0 mAO I = 100 mAO INPUT VOLTAGE in VOLTS 7.00 OUTPUT CURRENT in mA Dwg. GP-052-3 25 50 100 150 75 T = -20°CA 3.04 3.00 3.02 2.98 OUTPUT VOLTAGE in VOLTS 2.96 2.94 3.06 2.92 125 V = 8 VI V = 4 VI V = 6 VI 2.0 Dwg. GP-053-4 T = 25°C 50 mA INTERVALS A3.04 3.00 3.02 2.98 OUTPUT VOLTAGE in VOLTS 2.96 2.94 3.06 2.92 I = 0 mAO INPUT VOLTAGE in VOLTS 7.0 I = 100 mAO OUTPUT CURRENT in mA Dwg. GP-052-4 25 50 100 150 75 T = 25°C

2 V INTERVALS

A 3.04 3.00 3.02 2.98 OUTPUT VOLTAGE in VOLTS 2.96 2.94 3.06 2.92 125 V = 4 VI V = 8 VI CAUTION: Maximum allowable duty cycle will be significantly less than 100% at high temperatures, at high input voltages, or at high output currents. See Maximum Allowable Output Current table.

LOW-DROPOUT, TYPICAL CHARACTERISTICS (cont’d) LOAD REGULATION LINE REGULATION OUTPUT CURRENT in mA Dwg. GP-052-5 25 50 100 150 75 T = 85°C A 3.04 3.00 3.02 2.98 OUTPUT VOLTAGE in VOLTS 2.96 2.94 3.06 2.92 V = 4 VI V = 8 VI 125 2.0 Dwg. GP-053-5 T = 85°C 50 mA INTERVALS A 3.04 3.00 3.02 2.98 OUTPUT VOLTAGE in VOLTS 2.96 2.94 3.06 2.92 I = 0 mAO INPUT VOLTAGE in VOLTS 7.0 I = 100 mAO OUTPUT VOLTAGE -50 AMBIENT TEMPERATURE in °C Dwg. GP-050-1 3.01 2.99 0 +50 3.00 +100 2.98 OUTPUT VOLTAGE in VOLTS V = 6 V I = 0 I O 1.0 Dwg. GP-059 2.0 4.03.0 INPUT VOLTAGE in VOLTS 3.0 2.0 2.5 1.5 OUTPUT VOLTAGE in VOLTS 1.0 0.5 3.5 I = 0 - 100 mA O T = 25°CA CAUTION: Maximum allowable duty cycle will be significantly less than 100% at high temperatures, at high input voltages, or at high output currents. See Maximum Allowable Output Current table.

LOW-DROPOUT, Worcester, Massachusetts 01615-0036 (508) 853-5000 TYPICAL CHARACTERISTICS (concluded) QUIESCENT (GROUND TERMINAL) CURRENT 2.0 Dwg. GP-058 4.0 8.06.0 INPUT VOLTAGE in VOLTS QUIESCENT (GROUND TERMINAL) CURRENT in µA I = 0 O T = 25°CA T = -20°CA T = 85°CA -50 AMBIENT TEMPERATURE in °C Dwg. GP-051-2 0 +50 +100 QUIESCENT (GROUND TERMINAL) CURRENT in µA V = 6 V I = 0 I O OUTPUT CURRENT in mA Dwg. GP-054-1 25 50 100 150 75 T = -20°C T = 25°C T = 85°CA A A0.15 0.20 0.10 DROPOUT VOLTAGE in VOLTS0.05 0.25 125 DROPOUT VOLTAGE LOAD TRANSIENT PERFORMANCE VI = 3.2 V to 6.2 V, CO as specified, TA = 25°C Dwg. WP-028 VO IO 100 mA 1 mA 3.5 V 3.0 V 2.5 V <50 µs <600 µs VO 3.25 V 3.0 V 2.75 V C = 10 µFO C = 1 µFO CAUTION: Maximum allowable duty cycle will be significantly less than 100% at high temperatures, at high input voltages, or at high output currents. See Maximum Allowable Output Current table.

LOW-DROPOUT, (for reference only) Dwg. MA-009-3 in 1 23 0.064 0.072 0.155 0.167 0.059 BSC 0.014 0.0190.035 0.047 0.090 0.102 0.055 0.063 0.014 0.017 0.084 0.090 0.017 0.022 0.118 BSC 0.173 0.181 Dimensions in Millimeters (controlling dimensions) Dwg. MA-009-3 mm 1 23 4.40 4.60 1.62 1.83 3.94 4.25 1.50 BSC 0.36 0.480.89 1.20 2.29 2.60 1.40 1.60 0.35 0.44 2.13 2.29 0.44 0.56 3.00 BSC NOTES: 1. Lead spacing tolerance is non-cumulative. 2. Exact body and lead configuration at vendor’s option within limits shown.

LOW-DROPOUT, Worcester, Massachusetts 01615-0036 (508) 853-5000 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 responsibility for its use; nor for any infringements of patents or other rights of third parties which may result from its use.