PRELIMINARY INFORMATION LOW-DROPOUT REGULATORS — HIGH EFFICIENCY (subject to change without notice) January 18, 2000 NO CONNECT OUT A82xxSLH 5 4 Data Sheet 27468.11 8220 THRU 8233 Designed specifically to meet the requirement for extended operation of battery-powered equipment such as cordless and cellular telephones, the A8220SLH thru A8233SLH 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. Regulated output voltages of 2.6, 2.7, 2.8, 2.9, 3.0 and 3.3 are currently provided. Other voltages, down to 2.0 volts, are available on special order. NC T C U Y D L O N R P EO D C E N U E N R I E T F N E O R C S OR I D F — 1 2 3 ENABLE GND IN VR Dwg. PS-021-4 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 approached, 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 A8220SLH thru A8233SLH 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 smalloutline 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 ABSOLUTE MAXIMUM RATINGS Input Voltage, VI . . . . . . . . . . . . . . . 7 V Peak Output Current, IOM . . . . . . . . . . . . . . . . . . 100 mA* Enable Input Voltage, VE . . . . . . . . . . VI Operating Temperature Range, TA . . . . . . . . . . . . . -20°C to +85°C Junction Temperature, TJ . . . . +150°C Storage Temperature Range, TS . . . . . . . . . . . . -40°C to +150°C * 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 following pages. ■ High Efficiency Provides Extended Battery Life ■ 125 mV Typical Dropout Voltage at IO = 50 mA ■ 32 µA Typical Quiescent Current Less Than 1 µA “Sleep” Current ■ Low Output Noise ■ 100 mA Peak Output Current ■ Improved PSRR and Transient Performance APPLICATIONS ■ ■ ■ ■ Cordless and Cellular Telephones Personal Data Assistants Personal Communicators Palmtop Computers Always order by complete part number, e.g., A82xxSLH , where “xx” is the required output voltage in tenths. 8220 THRU 8233 LOW-DROPOUT REGULATORS FUNCTIONAL BLOCK DIAGRAM IN 3 4 DRIVE ENABLE ERROR AMP ENABLE BIAS 1 2 OUT BANDGAP REF. GND Dwg. FS-012-9 A82xxSLH 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 TA 1.5 2.0 2.5 3.0 3.5 4.0* 4.5* 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. 115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 Copyright © 2000, Allegro MicroSystems, Inc. 8220 THRU 8233 LOW-DROPOUT REGULATORS ELECTRICAL CHARACTERISTICS at TA = +25°C, VE ≥ 2.0 V (unless otherwise noted). Limits Characteristic Symbol Output Voltage VO (reference specified VO(nom)) Output Volt. Temp. Coeff. aVO Test Conditions Min. Typ. Max. Units 4 V ≤ VI ≤ 7 V, 10 µA ≤ IO ≤ 50 mA* -0.05 0.00 +0.05 V VI = VO(nom), IO = 50 mA — — -0.25 V 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 VImin - VO IO = 50 mA — 125 250 mV VI < 7 V, IO ≤ 50 mA — 32 45 µA VI ≤ 7 V, VE ≤ 0.8 V, IO = 0 mA — — 1.0 µA VEH 4 V ≤ VI ≤ 7 V, Output ON 2.0 — — V VEL 4 V ≤ VI ≤ 7 V, Output OFF — — 0.8 V VE = VI = 7 V — — ±1.0 µA VI = VO(nom) + 1.5 V, Vi = 100 mV, IO = 10 mA, f = 1 kHz f = 10 kHz — — 70 52 — — dB dB 10 Hz ≤ f ≤ 100 kHz, IO = 10 mA, CO = 10 µF — 0.5 — µV/√Hz Ground Terminal Current IGND IQ ENABLE Input Voltage ENABLE Input Current Rejection Ratio Output Noise IE PSRR en 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. www.allegromicro.com 8220 THRU 8233 LOW-DROPOUT REGULATORS TYPICAL CHARACTERISTICS LINE REGULATION +0.06 +0.03 +0.04 +0.02 OUTPUT VOLTAGE in VOLTS OUTPUT VOLTAGE in VOLTS LOAD REGULATION +0.02 VO(nom) VI = 4 V -0.02 VI = 7 V -0.04 TA = -20°C -0.06 TA = -20°C 25 mA INTERVALS +0.01 I O = 0 mA V O(nom) I = 50 mA -0.01 O -0.02 -0.03 -0.04 -0.08 0 10 20 30 40 50 60 2.0 3.0 4.0 5.0 7.0 6.0 Dwg. GP-053-17 +0.06 +0.03 +0.04 +0.02 OUTPUT VOLTAGE in VOLTS OUTPUT VOLTAGE in VOLTS Dwg. GP-052-16 +0.02 VI = 7 V V O(nom) -0.02 V =4V I -0.04 TA = 25°C -0.06 8.0 INPUT VOLTAGE in VOLTS OUTPUT CURRENT in mA TA = 25°C 25 mA INTERVALS +0.01 IO = 0 mA V O(nom) IO = 50 mA -0.01 -0.02 -0.03 -0.08 -0.04 0 10 20 30 40 50 60 2.0 3.0 4.0 5.0 Dwg. GP-052-17 CAUTION: 6.0 7.0 8.0 INPUT VOLTAGE in VOLTS OUTPUT CURRENT in mA Dwg. GP-053-18 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. 115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 8220 THRU 8233 LOW-DROPOUT REGULATORS TYPICAL CHARACTERISTICS (cont’d) LINE REGULATION +0.06 +0.03 +0.04 +0.02 OUTPUT VOLTAGE in VOLTS OUTPUT VOLTAGE in VOLTS LOAD REGULATION +0.02 V O(nom) VI = 7 V VI = 6 V -0.02 -0.04 VI = 4 V +0.01 IO = 0 mA V O(nom) IO = 60 mA -0.01 -0.02 -0.03 TA = 85°C -0.06 TA = 85°C -0.04 -0.08 0 10 20 30 50 40 2.0 60 3.0 4.0 5.0 6.0 7.0 8.0 INPUT VOLTAGE in VOLTS OUTPUT CURRENT in mA Dwg. GP-053-16 Dwg. GP-052-15 OUTPUT VOLTAGE 3.5 +0.02 V O(nom) 2.5 OUTPUT VOLTAGE in VOLTS OUTPUT VOLTAGE in VOLTS 3.0 2.0 1.5 I O = 0 - 50 mA 1.0 TA = 25°C +0.01 VO(nom) -0.01 VI = 6 V -0.02 IO = 0 0.5 0 0 1.0 2.0 3.0 4.0 INPUT VOLTAGE in VOLTS 0 +50 +100 AMBIENT TEMPERATURE in °C Dwg. GP-059-3 CAUTION: -50 Dwg. GP-050-4 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 8220 THRU 8233 LOW-DROPOUT REGULATORS TYPICAL CHARACTERISTICS (cont’d) GROUND TERMINAL/QUIESCENT CURRENT TA = 25°C 40 GROUND TERMINAL CURRENT in µA QUIESCENT (GROUND TERMINAL) CURRENT in µA 60 VI = 6 V IO = 0 VE ≥ 2 V 30 20 0 +100 +50 I O = 50 mA 40 30 IO = 0 20 10 0 -2.0 10 -50 50 V O(nom) AMBIENT TEMPERATURE in °C +2.0 +4.0 +6.0 INPUT VOLTAGE in VOLTS Dwg. GP-058-2 Dwg. GP-051-4 DROPOUT VOLTAGE 0.25 TA = 25°C VI ≥ VO(nom) + 0.30 V 45 0.20 DROPOUT VOLTAGE in VOLTS GROUND TERMINAL CURRENT in µA 50 40 35 30 25 TA = 85°C TA = 25°C TA = -20°C 0.15 0.10 0.05 0 20 0 20 40 60 0 10 20 30 Dwg. GP-071 CAUTION: 40 50 60 OUTPUT CURRENT in mA OUTPUT CURRENT in mA Dwg. GP-054-3 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. 115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 8220 THRU 8233 LOW-DROPOUT REGULATORS TYPICAL CHARACTERISTICS (concluded) LOAD TRANSIENT PERFORMANCE ENABLE TRANSIENT PERFORMANCE VI = 3.2 V to 6.2 V, CO = 4.7 µF, TA = 25°C VI = 3.2 V to 6.2 V, CO = 1 µF, TA = 25°C +30 mV VO(nom) VO(nom) -30 mV 2 µs 2 µs VO 0 <100 µs <150 µs VI 50 mA VE IO 0 1 mA Dwg. WP-027-3 Dwg. WP-028-3 APPLICATIONS INFORMATION 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 compensation 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 recommended 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 (RθJA = 220°C/W with a minimum footprint). Performance improvement is easily accomplished with the addition of 1 square inch of copper at terminal 2 (RθJA = 170°C/W). www.allegromicro.com The products described here are manufactured under one or more U.S. patents or U.S. patents pending. 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 responsibility for its use; nor for any infringement of patents or other rights of third parties which may result from its use. 8220 THRU 8233 LOW-DROPOUT REGULATORS Dimensions in Inches (for reference only) 0.122 0.079 0.018 0.012 0.028 0.083 0.073 5 1 0.0079 0.0059 4 2 3 0.118 0.106 4 5 0.039 0.022 0° TO 8° REF 0.037 0.095 1 0.0098 MIN 2 BSC 3 0.037 0.043 0.035 0.049 0.035 0.0059 0.00 Dwg. MA-010-15 in Dwg. MA-011-5 in Dimensions in Millimeters (controlling dimensions) 3.10 2.90 0.45 0.30 0.70 5 2.10 1.85 5 1 0.20 0.15 4 2 3 3.00 2.70 4 0.55 1.00 0° TO 8° REF 0.95 2.40 1 0.25 MIN 2 BSC 3 0.95 0.15 0.00 1.10 0.90 1.25 0.90 Dwg. MA-011-5 mm Dwg. MA-010-15 mm NOTES: 1. Tolerances on package height and width represent allowable mold offsets. Dimensions given are measured at the widest point (parting line). 2. Exact body and lead configuration at vendor’s option within limits shown. 3. Height does not include mold gate flash. 4. Where no tolerance is specified, dimension is nominal. 115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000