A\LAMBDA LINEAR REGULATORS LLM 350 3 AMP POSITIVE ADJUSTABLE VOLTAGE REGULATOR FEATURES e Adjustable output down to 1.2V e Line regulation typically 0.005%/V e Load regulation typically 0.1% e Current limit constant with temperature e Standard 3-terminal, TO-3 package DESCRIPTION The LLM 350 voltage regulator is a mono- lithic integrated circuit designed for use in applications requiring a well regulated positive output voltage. Outstanding fea- tures include full power usage up to 3.0 amperes of load current, internal current limiting, thermal shutdown, and safe area protection on the chip, providing protec- tion of the series pass Darlington, under most operating conditions. Hermetically sealed steel TO-3 packages are utilized for high reliability and low thermal resistance. The LLM 350, a three terminal adjustable regulator, is available with an output range from +1.2 to +32 Volts. The out- put voltage is easily set by two external resistors. Since the regulator is floating, higher output voltages can be regulated as long as the maximum input-output volt- age differential is not exceeded. PARAMETER | SYMBOL | MINIMUM | MAXIMUM | UNITS Input-Output Vin-Vout Voltage 35 Volts Differential Power P, Internally Dissipation Limited Thermal Resis- tance Junction B5c 3.0 C/Watt to Case Operating Junc- tion Tempera- Ty 0 125 c ture Range Storage Tem- _ perature Range Tste 65 180 Lead Tempera- ture (Soldering, 60 Seconds Teao 300 C Time Limit) ADJUSTABLE VOLTAGE REGULATOR?2 RECTIFIED INPUT 2) LLM 350 | CASE Vour 1 R, C, Ope Cy 2 1.0pF F + e oO Vour = 1.25V (1 + RA/R,) 1C, needed if device is far from filter capacitors. 2C, optional - improves transient response. O INPUT SAFE AREA PROTECTION a CURRENT = CIMITING LIMIT g AMPLIFIER OUTPUT & SENSE oa z & VOLTAGE = REGULATION AMPLIFIER + O ADJUST LLM 350 ELECTRICAL CHARACTERISTICS Test Conditions Test Limits Parameter Vin-Vour lo Ty Min | Typ | Max | Units Line Regulation? 3V to 35V 1.5A oc oe 5 es oo pe Load Regulation2 Vo = BV 25C 5 | 25 | mv v = TOMA 10 3A | ooo tp 195C 20 | 70: | mv Vo 2 5V 0C to 125C 0.3) 1.5 | % Thermal Regulation? 5V 1.5A 25C 0.002 | 0.03 | %/W Adjust Pin Current 5V 1.5A 0C to 125C 50 | 100 | pA Adjust Pin Current Change 3V to 35V 10mA to 3A | 0C to 125C 0.2 5 pA Reference Voltage 3V to 35V 10mA to 3A | 0C to 125C | 1.20} 1.25 | 1.30] V Temperature Stability 5V 1.5A 0C to 125C 1 % Minimum Load Current 35V 0C to 125C 3.5 | 10.0 | mA Current Limit hy 0C to 126C | $0 | 45 A RMS Output Noise* 5V 1.5A 25C 0.003 %IVo Ripple Rejection Ratios Cun = 10ut Vo = 10V 1.5A 0C to 125C 66 65 dB () Although power dissipation is internally limited, these specifications are applicable for power dissipations of 30 Watts. 2} Low duty cycle pulse testing with Kelvin connections required. Changes in output voltage due to heating effects are covered under the specification for thermal regulation. (3) 20mS pulse (4) BW = 10Hz to 10kHz (8) 120Hz input ripple 172 LLM 350 OPERATIONAL DATA CURRENT LIMIT RIPPLE REJECTION 100 = T, = 58C 9 . og = 80 Ss T, = 25C a = > Caos = 10nF 5 So 60& N. Ww ad c N\ x a Caps = 0 C oc 40 N uw ~ z z Vin = 15V ] 2 = 20b Vour = 10V a IL = 500mA Ty = 26C L 10 100 1K 10K 100K 1M Vin-Vour (VOLTS) FREQUENCY (Hz) LOAD REGULATION TEMPERATURE STABILITY 0.2 1.26 x o > 0 5 1.25 i & _o2 uy 1.24 = G a = 7 Ww ~0.4 O 1.23 9 > < Ww a Q 0.6 a 4.22 b Vin = 10V w 2 ti & -0.8b Voyr = 5V W424 2 = iva 36 L* 1.0 1.20 -75 -50 -25 OO 25 50 75 100 125 150 -75 -50-25 0 25 50 75 100 125 150 TEMPERATURE (C) TEMPERATURE (C) ADJUSTMENT CURRENT DROPOUT VOLTAGE 90 3.5 A Vout = 100mV z 80 = 3.0 5 _ i 70 ze 2.5 | g 3B 60 = 20 5 3 Gi | = = 50 > Zz 1.5 2 40 1.0 IL = 200mA < IL = 20mA 30 0.5 -75 -50 -25 O 25 50 75 10 125 150 7 -50 - 25 0 25 50 75 100 125 150 TEMPERATURE (C) TEMPERATURE (C) 173