A\ LAMBDA LINEAR REGULATORS LAS 1500 SERIES 1.5 AMP POSITIVE VOLTAGE REGULATORS FEATURES e Guaranteed Power Dissipation 15 Watts @ 87.5 Case e Guaranteed input-output differential: + 2.4 Volts e Low noise, band gap reference e Remote sense capability e Sample power cycled burn-in Guaranteed thermal resistance junction to case: 2.5 C/W DESCRIPTION The LAS 1500 Series voltage regulators are monolithic integrated circuits designed for use in applications requiring a well reg- ulated positive output voltage. Outstanding features include full power usage up to 1.5 amperes of load current, internal current limiting, thermal shutdown, and safe area protection on the chip, providing protection of the series pass Darlington, under most operating conditions. Herrnetically sealed steel TO-3 packages are utilized for high reliability and low thermal resistance. A low-noise, temperature stable band gap reference is the key design factor insuring excellent temperature regulation of the LAS 1500 Series. This, coupled to a very low output impedance, insures superior performance and load regulation. The LAS 15U, a four-terminal, adjustable regulator is available with an output range from +4to +30 Volts providing remote sense capability with a single potentiometer. PARAMETER | SYMBOL | MINIMUM | MAXIMUM ; UNITS Input Voltage Vin 35(40)() @) | Volts Power P Internally Dissipation 5 Limited) Thermal Resis- tance Junction Osc 2.5 CWatt to Case Operating Junc- tion Tempera- Ty 55 150 c ture Range Storage Tem- _ 6 perature Range "sre 68 150 Lead Tempera- wrote | Tao 0 | Time Limit) Short circuit protection is only assured to Viy max. Value of 35V applies to Veet i 5V to + 12V. Value of 40V applies to Vo of 13.8V to 24V and LAS 15U. @ in case of short circuit with input-output voltages approaching V\y max, regulator may require the removal of the input voltage to restart. ) For operation above 87.5C Tcase, deratae @ 400 mW/C. DEVICE SELECTION GUIDE Vour TOLERANCE Vout +5% +2% 5 LAS 1505 LAS 15A05 6 LAS 1506 LAS 15A06 8 LAS 1508 LAS 15A08 10 LAS 1510 LAS 15A10 12 LAS 1512 LAS 15A12 13.8 LAS 15CB - 15 LAS 1515 LAS 15A15 18 LAS 1518 LAS 15A18 20 LAS 1520 LAS 15A20 24 LAS 1524 LAS 15A24 4 to 30 LAS 15U (Adjustable/Remote Sense) BLOCK DIAGRAM CURRENT LIMITING AMPLIFIER INPUT SAFE AREA PROTECTION uMiT = 038 OUTPUT THERMAL OVERLOAD VOLTAGE REGULATION SENSE 0.25KQ, _ (DEPENDS ON V,) oO AMPLIFIER CONTROL FOR LAS 15U ONLY FAIS INTERNAL CONNECTION 1KQL | vaer| FOR FIXED LAS 1500 SERIES ONLY > ~O COMMON 125LAS 1500 SERIES ELECTRICAL CHARACTERISTICS Input voltage test conditions are as follows: V, = Vp + 3 Volts, V, = Vy + 10 Volts, V3 = Vo + 15 Volts, or the maximum input, whichever is less. Test Conditions Test Limits Parameter Symbol Vin lo Ty Min Max Units Output Voltage? Vo V, to V2 10mA to 1.5A 25C Volts LAS 1500" 0.95|Vol | 1.05]Vo} LAS 15A001 0.98\Vol | 1.02/Vol LAS 15U5 4.0 30.0 Input-Output . 19 Ro Differential Vin-Vo 1.5A 0-126C | 2.4 Volts Line Regulation2 REG cune) V, to V5 1.5A 25C 1.5 % Vo Load Regulation? | REG (oan) Vo + V 10mA to 1.5A 25C 0.6 % Vo Quiescent Current lo V; 10mA 25C 18.0 mA Quiescent Current | tg ane) | V, to Ve 40mA 25C 5.0 mA Quiescent Current | 16 oan) V; 10mA to 1.54 | 25C 5.0 mA Current Limit2 lum Vo + 5V 25C 5.2 Amps Temperature 49K) OLY (91 Coefficient To V1 0.1A 0-125C 0.02 Vo /C Output Noise3 49K Voltage Vw V; 0.1A 0-125C 10 pV ims/V Ripple 195 Attenuation Ra Vo + 5V 1.0A 0-125C 60 dB Control Voltage . 3 LAS 15U Ve V, to Vo 10mA 25C 3.6 4.0 Volts issinati Vin-Vour - 9 Power Dissipation Pp 2.4V to 10.0V 10mA to 1.5A | 0-125C 1 Watts (1) Nominal output voltages are specified under Device Selection Guide. (2) Low duty cycle pulse testing with Kelvin connections required. Die temperature changes must be accounted for separately. (3) BW = 10Hz - 100KHz (4) Ripple attenuation is specified for a 1Vrms, 120Hz, input rippie. Ripple attenuation is minimum of 60 d8 at 5V output and Is 1 d8 less for each volt increase in the output voltage. (5) Vo = Vo (1 + R1/R2) Ri = Resistance trom output to control R2 = Resistance from contro! to common 126LAS 1500 SERIES POWER DISSIPATION (WATTS) Vin-Vour (VOLTS) N o OPERATIONAL DATA POWER DERATING 125 16 10 5 0 55 20 40 60 80 100 120 140 160 CASE TEMPERATURE (C) MEASURED BETWEEN THE TERMINALS TYPICAL INPUT-OUTPUT VOLTAGE DIFFERENTIAL VS JUNCTION TEMPERATURE 3.0 2.5 2A 207A 0 15 1.0 -75 -50 -~-25 0 25 50 75 100 JUNCTION TEMPERATURE (C) TYPICAL RIPPLE ATTENUATION VS FREQUENCY RIPPLE ATTENUATION (dB) FREQUENCY (Hz) CURRENT LIMIT 4.0 3.5 3.0 \ TYPICAL ry KEE = 25C G 2.5 $ \ \ = b Zz = 20 \ \ TYPICAL __ 5 aj+At T, = 125C o z 5 15 N GUARANTEED POWER AREA U\< Ty = 0C- 128C 1.0 Lo N a] \ 5 5 \ \ 0 5 10 15 20 2 30 35 8 Vin Vo lo Ta OUTPUT IMPEDANCE (mf) 3 3 Vin-Vour (VOLTS) TYPICAL OUTPUT IMPEDANCE VS FREQUENCY 10V 5V 5A = 25C 100 1K 10K 100K FREQUENCY (Hz) 127LAS 1500 SERIES TYPICAL APPLICATIONS FIXED VOLTAGE REGULATOR ' RECTIFIED INPUT 1 9 o- ? LAS 1500 CG, 0.22yuF CASE Co 0.1 pF Sa Cin 2000 yF/AMP TT os ADJUSTABLE VOLTAGE REGULATOR? RECTIFIED INPUT O- ? LAS 15U 1} 2 a C; 0.22uF Ls Co 0.1yF Sn Re 3 +s > Cin 2000 wF/AMP Oo? Vo = Ve (1 + Ry / Ro) 1C, and Cz should be placed as close as possible to the regulator. 2 Vo 2=10mA R, + Ro 128LAS 1500 SERIES TYPICAL APPLICATIONS FIXED CURRENT REGULATOR RECTIFIED INPUT 1 LAS 1500 CASE la Vv - I = lo + R, ADJUSTABLE CURRENT REGULATOR"? RENPUT I S 4; taSisu C, 0.22uF Cin 2000 wF/ AMP = = Ig + Vo = Ve (1 + R,/ Ro) 1.5 AMP DUAL ADJUSTABLE REGULATOR 23 RECTIFIED POSITIVE INPUT 4 4 OUTPUT Tt LAS 15U C, * = 0.22uF COMMON O COMMON o- RECTIFIED 1 LAS 18U 2 NEGATIVE INPUT OUTPUT 1C,, Cz, Cy and C, to be placed as close as possible to the regulator. 2 Vo = 10 mA, where Rag = R, + RaorRs + Ry Ragj 3 Diodes D, & Dz should be low V,, high current diodes for optimum protection. 129LAS 1500 SERIES DEVICE OUTLINE oO O 1.050 MAX J 0.175R MAX 0.188R MAX BOTH ENDS BOTH ENDS 0.525R MAX b+ 1.575 MAX wJ }+~ 1.575 MAX +} ue 0.875 MAX MAX 0.064 DIA DIA 0.066 | 0.060 = 0.059 t | 7 To { 0.450 0.250 0.250 0.480 MTG 0.480 14 a | | 0.440 1 \ ute 0.480 0.043 BASE 7 | BASE 0.440 0.038 D! 0.043 _____|! 4 LEADS 0.038 DIA 2 LEADS 1477 1.197 0.151 a Tat 0.655 0.161 DIA 1675 2 HOLES 0.420 0.470 0.141 0.440 DIA L) [9.192 0.135 0.280 0.074 6 070 0.188 0.270 00707| eee I 0.664 Bottom View Bottom View 2 1 2 O X O O x 63 O 4@ 1Input 1Common 2-Output 2Control Case is common 3Output 4-Input Case is common NOTE: Case temperature measured at point X. 130 All dimensions are in inches.