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| 8182 INFORMATION DATA SHEET PRELIMINARY LOW-DROPOUT, (Subject to change without notice) 3 V REGULATOR November 14, 1994 8182 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. Data Sheet 27468.2 OUT IN ENABLE GND 1 2 3 3V 8 7 6 OUT IN COMP RESET VR 4 5 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 . . . . . . . . . . . . . -20C to +85C Junction Temperature, TJ . . . +150C Storage Temperature Range, TS . . . . . . . . . . . . -40C to +150C * 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 +150C. See next page. D EN U RE IN E TF NE OR CR SO I DF -- Dwg. PS-020 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. P O R D U T C 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 -20C to +85C. E C O Y L FEATURES AND BENEFITS s High Efficiency Provides Extended Battery Life s 85 mV Typical Dropout Voltage at IO = 60 mA s 46 A Typical Quiescent Current at VI = 6 V Less than 1 A "Sleep" Current s Up to 150 mA Output Current s CMOS-Compatible ON/OFF Control For Power-Up, Standby, or Shutdown s Internal Thermal Protection s Surface-Mount Package ABSOLUTE MAXIMUM RATINGS APPLICATIONS s s s s Cordless and Cellular Telephones Personal Data Assistants Personal Communicators Palmtop Computers Fault conditions that produce excessive junction temperature will activate device thermal shutdown circuitry. These conditions can be tolerated but should be avoided. Always order by complete part number: A8182SL . 8182 LOW-DROPOUT, 3 V REGULATOR FUNCTIONAL BLOCK DIAGRAM IN IN 7 2 8 1 OUT OUT BIAS DRIVE ERROR AMP 1.23 V BANDGAP REF. 6 COMP - 5 THERMAL PROTECT. RESET ENABLE 3 ENABLE + 4 GND 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 = 150C, Period 10 s* dc (Duty Cycle) TA 25C 50C 70C 85C 100% 150 150 145 120 90% 150 150 150 130 80% 150 150 150 150 70% 150 150 150 150 60% 150 150 150 150 50% 150 150 150 150 40% 150 150 150 150 30% 150 150 150 150 20% 150 150 150 150 * IO = (TJ - TA)/([VI - VO] RJA * 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 (c) 1994 Allegro MicroSystems, Inc. 8182 LOW-DROPOUT, 3 V REGULATOR ELECTRICAL CHARACTERISTICS at TA = +25C (unless otherwise noted). Limits Characteristic Output Voltage Symbol VO Test Conditions 4 V VI 8 V, 10 A IO 100 mA TA = +25C -20C TA +85C Min. 2.95 2.90 2.70 -- -- -- -- -- -- -- -- -- -- -- 2.0 -- -- 1.20 -- 12 -- -- -- -- 150 Mounted on 2.24" x 2.24" solder-coated copper-clad board in still air -- Typ. 3.00 3.00 -- -- 7.0 5.5 12 11 8.0 85 175 46 50 0.05 -- -- -- 1.23 -- 34 -25 -0.5 -- 100 -- 108 Max. 3.05 3.10 -- 0.5 14 11 30 25 20 150 TBD 60 65 1.0 -- 0.8 0.1 1.30 0.5 50 TBD -2.5 2.0 400 -- -- Units V V V mV/C mV mV mV mV mV mV mV A A A V V A V mV/C mV nA nA/C A mV C C/W VI = 3 V, IO = 60 mA, -20C TA +85C Output Volt. Temp. Coeff. Line Regulation VO VO(VI) VI = 6 V, IO = 10 mA 6 V VI 8 V, IO = 1 mA 4 V VI 6 V, IO = 1 mA Load Regulation VO(IO) 1 mA IO 100 mA, VI = 8 V 1 mA IO 100 mA, VI = 6 V 1 mA IO 100 mA, VI = 4 V Dropout Voltage VImin - VO IO = 60 mA IO = 125 mA* Quiescent Current (GND terminal current) IQ(off) ENABLE Input Voltage VEH VEL ENABLE Input Current COMP Threshold Voltage COMP Threshold Volt. TC COMP Threshold Hys. COMP Input Current COMP Input Current TC RESET Leakage Current RESET Output Voltage Thermal Shutdown Temp. Thermal Resistance IE VC(t) VC VC(hys) IC IC IOR VOR TJ RJA IQ VI = 6 V, 1 mA IO 100 mA, VE 2.0 V VI = 8 V, 1 mA IO 100 mA, VE 2.0 V 4 V VI 8 V, VE 0.8 V 4 V VI 8 V, -20C TA +85C Output ON Output OFF TA +85C, VE = VI = 8 V 4 V VI 8 V, VC increasing from 0 4 V VI 8 V 4 V VI 8 V 0 V VC VO 4 V VI 8 V VOR = VI = 10 V, TA = +85C IOR = 500 A Typical values are at TA = +25C 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 LOAD REGULATION 3.06 3.06 TA = -20C 50 mA INTERVALS LINE REGULATION 3.04 3.04 OUTPUT VOLTAGE in VOLTS 3.02 OUTPUT VOLTAGE in VOLTS 3.02 3.00 VI = 4 V 3.00 I 2.98 IO = 100 mA 2.96 O = 0 mA 2.98 2.96 VI = 8 V 2.94 TA = -20C 1 V INTERVALS 2.94 2.92 0 25 50 75 100 125 150 OUTPUT CURRENT in mA Dwg. GP-052 2.92 2.0 3.0 4.0 5.0 6.0 7.0 8.0 INPUT VOLTAGE in VOLTS Dwg. GP-053 3.06 3.06 TA = 25C 50 mA INTERVALS 3.04 3.04 OUTPUT VOLTAGE in VOLTS 3.02 VI = 4 V 3.00 OUTPUT VOLTAGE in VOLTS 3.02 I O = 0 mA 3.00 I 2.98 O = 100 mA 2.98 V =8V I 2.96 TA = 25C 1 V INTERVALS 2.96 2.94 2.94 2.92 0 25 50 75 100 125 150 OUTPUT CURRENT in mA Dwg. GP-052-1 2.92 2.0 3.0 4.0 5.0 6.0 7.0 8.0 INPUT VOLTAGE in VOLTS Dwg. GP-053-1 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. 115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 8182 LOW-DROPOUT, 3 V REGULATOR TYPICAL CHARACTERISTICS (cont'd) LOAD REGULATION 3.06 LINE REGULATION 3.06 TA = 85C 50 mA INTERVALS 3.04 3.04 OUTPUT VOLTAGE in VOLTS 3.02 OUTPUT VOLTAGE in VOLTS VI = 4 V 3.02 IO = 0 mA 3.00 3.00 I O = 100 mA 2.98 V =8V I 2.98 2.96 TA = 85C 1 V INTERVALS 2.96 2.94 2.94 2.92 0 25 50 75 100 125 150 OUTPUT CURRENT in mA Dwg. GP-052-2 2.92 2.0 3.0 4.0 5.0 6.0 7.0 8.0 INPUT VOLTAGE in VOLTS Dwg. GP-053-2 OUTPUT VOLTAGE 3.5 3.0 OUTPUT VOLTAGE in VOLTS OUTPUT VOLTAGE in VOLTS VI = 6 V 3.01 IO = 10 mA 2.5 2.0 3.00 1.5 I O = 10 A - 100 mA TA = 25C 2.99 1.0 2.98 0.5 0 0 1.0 2.0 3.0 INPUT VOLTAGE in VOLTS U N D EF IN ED 4.0 -50 0 +50 +100 AMBIENT TEMPERATURE in C Dwg. GP-056-1 Dwg. GP-050 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. 8182 LOW-DROPOUT, 3 V REGULATOR TYPICAL CHARACTERISTICS (cont'd) QUIESCENT (GROUND TERMINAL) CURRENT 60 QUIESCENT (GROUND TERMINAL) CURRENT in A 50 QUIESCENT (GROUND TERMINAL) CURRENT in A IO = 1 - 100 mA 50 VI =6V 48 = 10 mA O VE 2 V I 40 TA = -20C 30 46 20 TA = 25C TA = 85C 44 10 -50 0 +50 +100 0 0 2.0 4.0 6.0 8.0 INPUT VOLTAGE in VOLTS AMBIENT TEMPERATURE in C Dwg. GP-051 Dwg. GP-055 COMPARATOR VOLTAGE +V DROPOUT VOLTAGE 0.25 RESET OUTPUT VOLTAGE in VOLTS 0.20 DROPOUT VOLTAGE in VOLTS TA = -20C T = 25C A T = 85C A 0.15 T A = 85C T A = 25C T A = -20C 0.10 V =6V I I = 10 mA O 0.05 0 1.22 1.24 1.26 1.28 COMPARATOR INPUT VOLTAGE in VOLTS Dwg. GP-057 0 0 25 50 75 100 125 150 OUTPUT CURRENT in mA Dwg. GP-054 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. 115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 8182 LOW-DROPOUT, 3 V REGULATOR TYPICAL CHARACTERISTICS (concluded) LOAD TRANSIENT PERFORMANCE VI = 3.2 V to 6.2 V, CO = 1 F, TA = 25C ENABLE TRANSIENT PERFORMANCE VI = 3.2 V to 6.2 V, CO = 1 F, IO = 60 mA, TA = 25C 3.5 V VO 3.0 V 2.5 V <100 s 100 mA IO 1 mA Dwg. WP-026 3.0 V VO 0 <300 s VI VE 0 <125 s <250 s Dwg. WP-027 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 k to 1 M. 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 0.050 0.016 0.020 0.013 1 0.1968 0.1890 0.050 BSC 0 TO 8 0.0688 0.0532 0.0040 MIN. Dwg. MA-007-8 in Dimensions in Millimeters 8 0.25 0.19 6.20 5.80 4.00 3.80 1.27 0.40 0.51 0.33 1 5.00 4.80 1.27 BSC 0 TO 8 1.75 1.35 0.10 MIN. Dwg. MA-007-8 mm 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. 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 |
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