LOW-DROPOUT, (Subject to change without notice) 3November V REGULATOR 14, 1994 8182 Data Sheet 27468.2 8182 PRELIMINARY INFORMATION DATA SHEET LOW-DROPOUT, 3 V REGULATOR — HIGH EFFICIENCY Designed specifically to meet the requirement for extended operation of battery-powered equipment such as cordless and cellular telephones, the A8182SL 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 3 V output at up to 150 mA. T C 3V U 8 OUT 2 7 IN ENABLE 3 6 COMP GND 4 5 RESET OUT 1 IN VR D Y L A PMOS pass element provides a typical dropout voltage of only 85 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 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. An ENABLE input and RESET output gives the designer complete control over power up, standby, or power down. O R P E C O D E N U RE N E I T F N E O R C R S I O D F — Dwg. PS-020 N This device is supplied in an 8-lead small-outline plastic package (SOIC) for surface-mount applications. The A8182SL is rated for operation over a temperature range of -20°C to +85°C. FEATURES AND BENEFITS ABSOLUTE MAXIMUM RATINGS Input Voltage, VI . . . . . . . . . . . . . . 10 V Output Current, IO . . . . . . . . . 150 mA* Enable Input Voltage, VE . . . . . . . . . . VI Reset Output Voltage, VOR . . . . . . . . VI Reset Output Current, IOR . . . . 1.0 mA 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 next page. † Fault conditions that produce excessive junction temperature will activate device thermal shutdown circuitry. These conditions can be tolerated but should be avoided. ■ High Efficiency Provides Extended Battery Life ■ 85 mV Typical Dropout Voltage at IO = 60 mA ■ 46 µA Typical Quiescent Current at VI = 6 V Less than 1 µA “Sleep” Current ■ Up to 150 mA Output Current ■ CMOS-Compatible ON/OFF Control For Power-Up, Standby, or Shutdown ■ Internal Thermal Protection ■ Surface-Mount Package APPLICATIONS ■ ■ ■ ■ Cordless and Cellular Telephones Personal Data Assistants Personal Communicators Palmtop Computers Always order by complete part number: A8182SL . 8182 LOW-DROPOUT, 3 V REGULATOR FUNCTIONAL BLOCK DIAGRAM IN 7 8 OUT IN 2 1 OUT 6 COMP 5 RESET 4 GND DRIVE 3 ENABLE ENABLE ERROR AMP – 1.23 V THERMAL PROTECT. BIAS + BANDGAP REF. Dwg. FS-012-2 For proper operation, terminals 1 and 8 should be externally connected together, terminals 2 and 7 should be externally connected together. 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 150 150 150 150 150 150 150 150 150 50°C 150 150 150 150 150 150 150 150 150 70°C 145 150 150 150 150 150 150 150 150 85°C 120 130 150 150 150 150 150 150 150 * IO = (TJ - TA)/([VI - VO] RθJA • dc) = (150 - TA)/(5 • 108 • 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. 115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 W Copyright © 1994 Allegro MicroSystems, Inc. 8182 LOW-DROPOUT, 3 V REGULATOR ELECTRICAL CHARACTERISTICS at TA = +25°C (unless otherwise noted). Limits Characteristic Symbol Output Voltage VO Test Conditions Line Regulation Load Regulation Dropout Voltage Quiescent Current ENABLE Input Current Max. Units TA = +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 2.70 — — V VI = 6 V, IO = 10 mA — — ±0.5 mV/°C 6 V ≤ VI ≤ 8 V, IO = 1 mA — 7.0 14 mV 4 V ≤ VI ≤ 6 V, IO = 1 mA — 5.5 11 mV 1 mA ≤ IO ≤ 100 mA, VI = 8 V — 12 30 mV 1 mA ≤ IO ≤ 100 mA, VI = 6 V — 11 25 mV 1 mA ≤ IO ≤ 100 mA, VI = 4 V — 8.0 20 mV IO = 60 mA — 85 150 mV IO = 125 mA* — 175 TBD mV VI = 6 V, 1 mA ≤ IO ≤ 100 mA, VE ≥ 2.0 V — 46 60 µA VI = 8 V, 1 mA ≤ IO ≤ 100 mA, VE ≥ 2.0 V — 50 65 µA IQ(off) 4 V ≤ VI ≤ 8 V, VE ≤ 0.8 V — 0.05 1.0 µA VEH 4 V ≤ VI ≤ 8 V, Output ON 2.0 — — V VEL -20°C ≤ TA ≤ +85°C Output OFF — — 0.8 V — — ±0.1 µA 1.20 1.23 1.30 V αVO ∆VO(∆VI) ∆VO(∆IO) VImin - VO IQ (GND terminal current) ENABLE Input Voltage Typ. 4 V ≤ VI ≤ 8 V, VI = 3 V, IO = 60 mA, -20°C ≤ TA ≤ +85°C Output Volt. Temp. Coeff. Min. IE TA ≤ +85°C, VE = VI = 8 V COMP Threshold Voltage VC(t) 4 V ≤ VI ≤ 8 V, VC increasing from 0 COMP Threshold Volt. TC αVC 4 V ≤ VI ≤ 8 V — — ±0.5 mV/°C VC(hys) 4 V ≤ VI ≤ 8 V 12 34 50 mV COMP Input Current IC 0 V ≤ VC ≤ VO — -25 TBD nA COMP Input Current TC αIC 4 V ≤ VI ≤ 8 V — -0.5 -2.5 nA/°C RESET Leakage Current IOR VOR = VI = 10 V, TA = +85°C — — 2.0 µA RESET Output Voltage VOR IOR = 500 µA — 100 400 mV 150 — — °C — 108 — °C/W COMP Threshold Hys. Thermal Shutdown Temp. Thermal Resistance TJ RθJA Mounted on 2.24" x 2.24" solder-coated copper-clad board in still air Typical values are at TA = +25°C and are given for circuit design information only. * Pulse test (≤50 ms). See previous page for duty cycle limitations. 8182 LOW-DROPOUT, 3 V REGULATOR TYPICAL CHARACTERISTICS LINE REGULATION 3.06 3.06 3.04 3.04 OUTPUT VOLTAGE in VOLTS OUTPUT VOLTAGE in VOLTS LOAD REGULATION 3.02 VI = 4 V 3.00 2.98 2.96 VI = 8 V TA = -20°C 2.94 TA = -20°C 50 mA INTERVALS 3.02 3.00 I = 0 mA O 2.98 IO = 100 mA 2.96 2.94 1 V INTERVALS 2.92 2.92 0 25 50 75 125 100 150 2.0 3.0 4.0 5.0 6.0 7.0 Dwg. GP-053 3.06 3.06 3.04 3.04 OUTPUT VOLTAGE in VOLTS OUTPUT VOLTAGE in VOLTS Dwg. GP-052 3.02 VI = 4 V 3.00 2.98 V =8V I 2.96 TA = 25°C 2.94 8.0 INPUT VOLTAGE in VOLTS OUTPUT CURRENT in mA TA = 25°C 50 mA INTERVALS 3.02 I O = 0 mA 3.00 I 2.98 O = 100 mA 2.96 2.94 1 V INTERVALS 2.92 2.92 0 25 50 75 100 125 150 2.0 3.0 4.0 5.0 Dwg. GP-052-1 CAUTION: 6.0 7.0 8.0 INPUT VOLTAGE in VOLTS OUTPUT CURRENT in mA Dwg. GP-053-1 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. 115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 8182 LOW-DROPOUT, 3 V REGULATOR TYPICAL CHARACTERISTICS (cont’d) LINE REGULATION 3.06 3.06 3.04 3.04 3.02 OUTPUT VOLTAGE in VOLTS OUTPUT VOLTAGE in VOLTS LOAD REGULATION VI = 4 V 3.00 2.98 V =8V I 2.96 TA = 85°C 2.94 TA = 85°C 50 mA INTERVALS 3.02 IO = 0 mA 3.00 I O = 100 mA 2.98 2.96 2.94 1 V INTERVALS 2.92 2.92 0 25 50 75 125 100 150 2.0 OUTPUT CURRENT in mA 3.0 4.0 5.0 6.0 7.0 8.0 INPUT VOLTAGE in VOLTS Dwg. GP-052-2 Dwg. GP-053-2 OUTPUT VOLTAGE 3.5 OUTPUT VOLTAGE in VOLTS 2.5 2.0 1.5 I O = 10 µA - 100 mA 1.0 TA = 25°C 0.5 0 0 1.0 2.0 3.0 4.0 IO = 10 mA 3.00 2.99 2.98 -50 0 +50 +100 AMBIENT TEMPERATURE in °C INPUT VOLTAGE in VOLTS Dwg. GP-056-1 CAUTION: VI = 6 V 3.01 U N D EF IN ED OUTPUT VOLTAGE in VOLTS 3.0 Dwg. GP-050 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. 8182 LOW-DROPOUT, 3 V REGULATOR TYPICAL CHARACTERISTICS (cont’d) QUIESCENT (GROUND TERMINAL) CURRENT QUIESCENT (GROUND TERMINAL) CURRENT in µA VI =6V I = 10 mA O VE ≥ 2 V 48 46 44 0 -50 +50 +100 QUIESCENT (GROUND TERMINAL) CURRENT in µA 60 50 IO = 1 – 100 mA 50 40 TA = -20°C 30 20 TA = 25°C TA = 85°C 10 0 0 2.0 AMBIENT TEMPERATURE in °C 4.0 8.0 6.0 INPUT VOLTAGE in VOLTS Dwg. GP-051 Dwg. GP-055 COMPARATOR VOLTAGE DROPOUT VOLTAGE +V 0.25 V =6V I I = 10 mA O DROPOUT VOLTAGE in VOLTS T = 85°C A TA = 25°C TA = -20°C RESET OUTPUT VOLTAGE in VOLTS 0.20 T A = 85°C T A = 25°C T A = -20°C 0.15 0.10 0.05 0 0 1.22 1.24 1.26 1.28 COMPARATOR INPUT VOLTAGE in VOLTS 0 25 50 75 125 150 OUTPUT CURRENT in mA Dwg. GP-057 CAUTION: 100 Dwg. GP-054 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. 115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 8182 LOW-DROPOUT, 3 V REGULATOR TYPICAL CHARACTERISTICS (concluded) LOAD TRANSIENT PERFORMANCE ENABLE TRANSIENT PERFORMANCE VI = 3.2 V to 6.2 V, CO = 1 µF, TA = 25°C VI = 3.2 V to 6.2 V, CO = 1 µF, IO = 60 mA, TA = 25°C 3.0 V 3.5 V VO VO 3.0 V 0 2.5 V <100 µs <125 µs <300 µs <250 µs VI 100 mA VE IO 1 mA 0 Dwg. WP-027 Dwg. WP-026 INPUT, COMPARATOR, & OUTPUT RELATIONSHIPS The RESET output of the comparator produces a logic low whenever the COMP input is below 1.23 V. An out-of-regulation detector can be configured by dividing down the regulator output (an R/R divider is typical) and connecting it to the COMP input. As tne regulator input is ramped up, the RESET signal becomes valid (low) at approximately VI = 1.3 V. The RESET signal will go high when VC = 1.23 V (VO = 2.46 V with an R/R divider). Comparator hysteresis prevents oscillations under low battery conditions. The RESET open-drain output requires an external pull-up resistor. This can be returned to either the input supply or the regulator output, depending on suystem requirements. Note that the RESET sink current is adds to the battery drain in a low-battery condition. Suggested values range from 100 kΩ to 1 MΩ. RESET should be left unconnected if it is not used. 10 V MAX. VI 1.3 V V O 3.0 V VC(hys) VC * 1.23 V VOR OUTPUT UNDEFINED Dwg. WP-025 *Comparator input voltage is normally obtained from a resistive divider off of the output. 8182 LOW-DROPOUT, 3 V REGULATOR Dimensions in Inches (Based on 1 mm = 0.03937”) 8 0.0098 0.0075 0.1574 0.1497 0.2440 0.2284 0.020 0.013 1 0.050 0.050 0.016 0° TO 8° BSC 0.1968 0.1890 0.0688 0.0532 0.0040 MIN. Dwg. MA-007-8 in Dimensions in Millimeters 8 0.25 0.19 4.00 3.80 0.51 0.33 6.20 5.80 1 1.27 BSC 1.27 0.40 0° TO 8° 5.00 4.80 1.75 1.35 0.10 MIN. 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. Components made under military approvals will be in accordance with the approval requirements. 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. Dwg. MA-007-8 mm NOTES: 1. Lead spacing tolerance is non-cumulative. 2. Exact body and lead configuration at vendor’s option within limits shown. 115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000