8226 ALLEGRO | Alldatasheet
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— FOR REFERENCE ONLY Designed specifically to meet the requirement for extended opera- tion of battery-powered equipment such as cordless and cellular tele- phones, the A8226SLM thru A8233SLM voltage regulators offer the reduced dropout voltage and quiescent current essential for maximum battery life. Applicable also to palmtop computers and personal data assistants, these devices deliver a regulated output at up to 100 mA (transient), which is limited only by package power dissipation. Regu- provided. Other voltages, down to 2.0 volts, are available on special order. A PMOS pass element provides a typical dropout voltage of only 125 mV at 50 mA of load current. The low dropout voltage permits deeper battery discharge before output regulation is lost. Quiescent current does not increase significantly 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. The A8226SLM thru A8233SLM include ENABLE inputs to give the designer complete control over power up, standby, or power down. These devices are supplied in a thermally enhanced 5-lead small- outline plastic package similar to the SOT-23, and fitting the SC-74A footprint. All devices are rated for operation over a temperature range of -20°C to +85°C. FEATURES AND BENEFITS I High Efficiency Provides Extended Battery Life I 125 mV Typical Dropout Voltage at IO = 50 mA I 32 µA Typical Quiescent Current Less Than 1 µA “Sleep” Current I Low Output Noise I 100 mA Peak Output Current I Improved PSRR and Transient Performance
APPLICATIONS
I Cordless and Cellular Telephones I Personal Data Assistants I Personal Communicators I Palmtop Computers LOW-DROPOUT REGULATORS — HIGH EFFICIENCY Data Sheet
27468.108226 THRU
(subject to change without notice) January 18, 2000 A82xxSLM Always order by complete part number, e.g., A82xxSLM , where “xx” is the required output voltage in tenths. ABSOLUTE MAXIMUM RATINGS Peak Output Current, 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 follow- ing pages. Dwg. PS-021-3 VR 2GND 3NO CONNECT 1ENABLE 5 IN OUT NC
8226 THRU 8233
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000 FUNCTIONAL BLOCK DIAGRAM Copyright © 2000, Allegro MicroSystems, Inc. A82xxSLM Maximum Allowable Average 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. Allowable Total Average (10 ms) Output Current in Milliamperes with TJ = 150°C, Duty Cycle = 100%† VI - VO 25°C 100 100 100 100 100 100 100 50°C 100 100 100 100 100 100 100 70°C 100 100 100 100 100 91 81 85°C 100 100 100 98 84 74 66 * Absolute maximum peak output current rating is 100 mA; absolute maximum input voltage is 7 V. † IO = (TJ – TA)/([VI – VO] RθJA x dc) = (150 – TA)/([VI – VO] x 220 x 1.00) Output current rating can be increased (to 100 mA maximum) by additional heat sinking or reducing the duty cycle. Dwg. FS-012-5B BIAS DRIVE ENABLE BANDGAP REF. ERROR AMP IN ENABLE OUT5 4
2 GND
www.allegromicro.com ELECTRICAL CHARACTERISTICS at TA = +25°C, VE ≥ 2.0 V (unless otherwise noted). Limits Characteristic Symbol Test Conditions Min. Typ. Max. Units Output Voltage V O 4 V ≤ VI ≤ 7 V, 10 µA ≤ IO ≤ 50 mA* -0.05 0.00 +0.05 V (reference specified VO(nom)) VI = VO(nom), IO = 50 mA — — -0.25 V Output Volt. Temp. Coeff. a VO VI = 6 V, IO = 10 mA, TJ ≤ 125°C — -0.20 — mV/ °C Line Regulation ∆VO(∆VI) 4 V ≤ VI ≤ 7 V, IO = 1 mA — 3.0 10 mV Load Regulation ∆VO(∆IO) 1 mA ≤ IO ≤ 50 mA*, 4 V ≤ VI ≤ 7 V — — 20 mV Dropout Voltage V Imin - VO IO = 50 mA — 125 250 mV Ground Terminal Current I GND VI < 7 V, IO ≤ 50 mA — 32 45 µA IQ VI ≤ 7 V, VE ≤ 0.8 V, IO = 0 mA — — 1.0 µA ENABLE Input Voltage V EH 4 V ≤ VI ≤ 7 V, Output ON 2.0 — — V VEL 4 V ≤ VI ≤ 7 V, Output OFF — — 0.8 V ENABLE Input Current I E VE = VI = 7 V — — ±1.0 µA Rejection Ratio PSRR V I = VO(nom) + 1.5 V, Vi = 100 mV, IO = 10 mA, f = 1 kHz — 70 — dB f = 10 kHz — 52 — dB Output Noise e n 10 Hz ≤ f ≤ 100 kHz, IO = 10 mA, CO = 10 µF — 0.5 — µV/√Hz 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.
Worcester, Massachusetts 01615-0036 (508) 853-5000 TYPICAL CHARACTERISTICS LOAD REGULATION LINE REGULATION OUTPUT CURRENT in mA Dwg. GP-052-16 10 20 40 6030 T = -20°CA +0.04 V +0.02 -0.02 OUTPUT VOLTAGE in VOLTS -0.04 -0.06 +0.06 -0.08 V = 7 VI V = 4 VIO(nom) 2.0 Dwg. GP-053-17 T = -20°C 25 mA INTERVALS A I = 0 mAO INPUT VOLTAGE in VOLTS I = 50 mAO 7.0 +0.02 VO(nom) +0.01 -0.01 OUTPUT VOLTAGE in VOLTS -0.02 -0.03 +0.03 -0.04 OUTPUT CURRENT in mA Dwg. GP-052-17 10 20 40 60 30 T = 25°CA V = 4 VI V = 7 VI +0.04 VO(nom) +0.02 -0.02 OUTPUT VOLTAGE in VOLTS -0.04 -0.06 +0.06 -0.08 2.0 Dwg. GP-053-18 T = 25°C 25 mA INTERVALS A I = 0 mAO INPUT VOLTAGE in VOLTS 7.0 I = 50 mAO +0.02 VO(nom) +0.01 -0.01 OUTPUT VOLTAGE in VOLTS -0.02 -0.03 +0.03 -0.04 CAUTION: Maximum allowable duty cycle will be significantly less than 100% at high temperatures, at high input voltages, or at high output currents. See appropriate Maximum Allowable Output Current table.
www.allegromicro.com TYPICAL CHARACTERISTICS (cont’d) LOAD REGULATION LINE REGULATION OUTPUT VOLTAGE OUTPUT CURRENT in mA Dwg. GP-052-15 10 20 40 60 30 T = 85°CA V = 4 VI V = 7 VI +0.04 VO(nom) +0.02 -0.02 OUTPUT VOLTAGE in VOLTS -0.04 -0.06 +0.06 -0.08 V = 6 VI 2.0 Dwg. GP-053-16 T = 85°CA I = 0 mAO INPUT VOLTAGE in VOLTS 7.0 I = 60 mAO +0.02 VO(nom) +0.01 -0.01 OUTPUT VOLTAGE in VOLTS -0.02 -0.03 +0.03 -0.04 1.0 Dwg. GP-059-3 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 - 50 mA O T = 25°CA VO(nom) -50 AMBIENT TEMPERATURE in °C Dwg. GP-050-4 0 +50 +100 V = 6 V I = 0 I O VO(nom) +0.01 -0.01 OUTPUT VOLTAGE in VOLTS -0.02 +0.02 CAUTION: Maximum allowable duty cycle will be significantly less than 100% at high temperatures, at high input voltages, or at high output currents. See appropriate Maximum Allowable Output Current table.
Worcester, Massachusetts 01615-0036 (508) 853-5000 TYPICAL CHARACTERISTICS (cont’d) GROUND TERMINAL/QUIESCENT CURRENT CAUTION: Maximum allowable duty cycle will be significantly less than 100% at high temperatures, at high input voltages, or at high output currents. See appropriate Maximum Allowable Output Current table. -50 AMBIENT TEMPERATURE in °C Dwg. GP-051-4 0 +50 +100 QUIESCENT (GROUND TERMINAL) CURRENT in µA V = 6 V I = 0 V ≥ 2 V I O E -2.0 Dwg. GP-058-2 +2.0 +4.0 INPUT VOLTAGE in VOLTS GROUND TERMINAL CURRENT in µA T = 25°CA VO(nom) +6.0 I = 50 mA I = 0 O O DROPOUT VOLTAGE OUTPUT CURRENT in mA Dwg. GP-054-3 10 20 40 60 30 T = -20°C T = 25°C T = 85°CA A A 0.20 0.10 DROPOUT VOLTAGE in VOLTS 0.25 0.15 0.05 Dwg. GP-071 20 40 OUTPUT CURRENT in mA GROUND TERMINAL CURRENT in µA 45 VI ≥ VO(nom) + 0.30 V TA = 25°C
www.allegromicro.com TYPICAL CHARACTERISTICS (concluded) LOAD TRANSIENT PERFORMANCE VI = 3.2 V to 6.2 V, CO = 4.7 µF, TA = 25°C ENABLE TRANSIENT PERFORMANCE VI = 3.2 V to 6.2 V, CO = 1 µF, TA = 25°C Dwg. WP-027-3 VO VE <100 µs <150 µs VI VO(nom) Dwg. WP-028-3 IO 50 mA 1 mA 2 µs 2 µs VO(nom) +30 mV -30 mV Linear regulators require input and output capacitors in order to maintain over-all loop stability. The recommended minimum value for the input capacitor is 0.1 µF. The output capacitor is the dominant pole that provides the high-frequency compensa- tion required for over-all regulator loop stability. These devices are stable with as little as 1 µF. However, to ensure stable operation under all conditions and capacitor types, the recom- mended minimum value is 4.7 µF. The output capacitor may be partially distributed through the load circuits. However, at least 1 µF should be connected at the regulator using the shortest and widest foil pattern possible. Thermal Considerations These devices are intended to provide up to 100 mA of load current in a very small package. The table on page 2 of this data sheet gives the maximum allowable average output current for a worst-case printed circuit design (R θJA = 220°C/W with a minimum footprint). Performance improvement is easily accomplished with the addition of 1 square inch of copper at terminal 2 (R θJA = 170°C/W). APPLICATIONS INFORMATION The products described here are manufactured under one or more 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 performance, reliability, or manufacturability of its products. Before placing an order, the user is cautioned to verify that the information being relied upon is current. Allegro products are not authorized for use as critical components in life-support devices or systems without express written approval. The information included herein is believed to be accurate and reliable. However, Allegro MicroSystems, Inc. assumes no responsi- bility for its use; nor for any infringement of patents or other rights of third parties which may result from its use.
Worcester, Massachusetts 01615-0036 (508) 853-5000 Dimensions in Inches (for reference only) Dimensions in Millimeters (controlling dimensions) Dwg. MA-010-5 in 1 3 0.0059 0.0000 0.051 0.040 0.0063 0.122 0.107 0.070 0.059 0.118 0.098 0.0374 BSC 0.019 0.012 0.0748 BSC 0° TO 10° Dwg. MA-011-5 mm 0.70 1.00 2.40 0.95 Dwg. MA-011-5 in 0.028 0.039 0.095 0.037 NOTE: Exact body and lead configuration at vendor’s option within limits shown. Dwg. MA-010-5 mm 1 3 0.15 0.00 1.30 1.00 0.16 3.10 2.70 1.80 1.50 3.00 2.50 0.95 BSC 0.50 0.30 1.90 BSC 0° TO 10°