LX8385B-33CDD

LX8385x-xx ® TM 3A Low Dropout Positive Regulators P RODUCTION D ATA S HEET KEY FEATURES DESCRIPTION The LX8385/85A/85B Series devices are pin-compatible with earlier 3-terminal regulators, such as the 117 series products, but they do require input and output capacitors. A minimum 10µF capacitor is required on the input and a 15µF or greater on the output of these new devices for stability. Although, these capacitors are generally included in most regulator designs. The LX8385/85A/85B Series quiescent current flows into the load, thereby increasing efficiency. This feature contrasts with PNP regulators where up to 10% of the output current is wasted as quiescent current. The LX8385-xxI is specified over the industrial temperature range of -25°C to 125°C, while the LX8385-xxC / 85A-xxC / 85B-xxC is specified over the commercial range of 0°C to 125°C. IMPORTANT: For the most current data, consult MICROSEMI’s website: http://www.microsemi.com PRODUCT HIGHLIGHT IN 5V LX8385A OUT 3.3V at 3A + *1500µF 6MV1500GX Sanyo 121 Ω 1% ADJ + 1500µF 2x 6MV1500GX Sanyo 200 Ω 1% ƒ Three-Terminal Adjustable Or Fixed Output ƒ Guaranteed 1% Voltage Reference Accuracy Over Line, Load, And Temperature (LX8385B) ƒ Guaranteed < 1.5V Headroom At 3A (LX8385) ƒ Guaranteed < 1.3V Headroom At 3A (LX8385A/8385B) ƒ 0.015% Line Regulation ƒ 0.15% Load Regulation WWW . Microsemi .C OM The LX8385/85A/85B Series ICs are positive regulators designed to provide 3A output current. These regulators yield higher efficiency than currently available devices with all internal circuitry designed to operate down to a 1V input-to-output differential. In each of these products, the dropout voltage is fully specified as a function of load current. Dropout is guaranteed at a maximum of 1.3V (8385A/B) and 1.5V (8385) at maximum output current, decreasing at lower load currents. In addition, on-chip trimming adjusts the reference voltage tolerance to 1% maximum at room temperature and 2% maximum over the 0 to 125°C range for the LX8385A. The LX8385B offers 0.8% tolerance at room temperature and 1.0% maximum over line, load and temperature. Fixed versions are also available and specified in the Available Options table below. APPLICATIONS ƒ High Efficiency Linear Regulators ƒ Post Regulators For Switching Power Supplies ƒ Battery Chargers ƒ Constant Current Regulators ƒ Graphics & Standard Supplies ƒ Processor I/O Supply ƒ Low Voltage Memory & Chipset Supplies PART # OUTPUT VOLTAGE LX8385/85A/85B-00 Adjustable LX8385/85A/85B-33 3.3V LX8385/85A/85B-05 5.0V Table 1 - Available Options 0 to 125 -25 to 125 2.0% 2.0% 1.0% 2.0% 1.5V 1.3V 1.3V 1.5V DD LX8385X TA (°C) PACKAGE ORDER INFO Plastic TO-220 Plastic TO-252 Max Ref Max Dropout DT (D-Pak) 3-Pin P 3-Pin Accuracy Voltage RoHS Compliant RoHS Compliant Plastic TO-263 3-Pin Transition DC: 0532 Transition DC: 0543 RoHS Compliant Transition DC: 0535 LX8385-xxCDT LX8385A-xxCDT LX8385B-xxCDT LX8385-xxIDT LX8385-xxCP LX8385A-xxCP LX8385B-xxCP LX8385-xxIP LX8385-xxCDD LX8385A-xxCDD LX8385B-xxCDD LX8385-xxIDD Note: Available in Tape & Reel. Append the letters “TR” to the part number. (i.e. LX8385-xxCP-TR) Copyright © 2000 Rev. 2.0b, 2005-10-25 Microsemi Inc. Integrated Products Division 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 Page 1 LX8385x-xx ® TM 3A Low Dropout Positive Regulators P RODUCTION D ATA S HEET PACKAGE PIN OUT Power Dissipation ................................................................................... Internally Limited Input Voltage ................................................................................................................ 10V Input to Output Voltage Differential............................................................................. 10V Operating Junction Temperature................................................................................ 150°C Storage Temperature Range....................................................................... -65°C to 150 °C Peak Package Solder Reflow Temp (40 seconds max. exposure) .................260°C (+0, -5) WWW . Microsemi .C OM ABSOLUTE MAXIMUM RATINGS (NOTE 1) TAB is V OUT Note 1: Exceeding these ratings could cause damage to the device. All voltages are with respect to Ground. Currents are positive into, negative out of specified terminal. 3 V IN 2 V OUT 1 ADJ / GND* DD PACKAGE (3-PIN) (Top View) TAB is V OUT V IN 3 THERMAL DATA 2 DD Plastic TO-263 3-Pin THERMAL RESISTANCE-JUNCTION TO AMBIENT, θJA THERMAL RESISTANCE-JUNCTION TO TAB, θJT ADJ/ GND* 1 60°C/W 2.7°C/W DT PACKAGE (3-PIN) (Top View) TAB is V OUT P Plastic TO-220 3-Pin THERMAL RESISTANCE-JUNCTION TO AMBIENT, θJA THERMAL RESISTANCE-JUNCTION TO TAB, θJT V OUT 60°C/W 2.7°C/W 3 V IN 2 V OUT ADJ / GND* 1 DT Plastic TO-252 3-Pin THERMAL RESISTANCE-JUNCTION TO AMBIENT, θJA THERMAL RESISTANCE-JUNCTION TO TAB, θJT 60°C/W 2.7°C/W P PACKAGE (3-PIN) (Top View) *Pin 1 is GND for fixed voltage versions Junction Temperature Calculation: TJ = TA + (PD x θJT). The θJA & θJT numbers are guidelines for the thermal performance of the device/pc-board system. All of the above assume no ambient airflow. RoHS 100% Matte Tin Lead Finish BLOCK DIAGRAM V IN Bias Circuit Bandgap Circuit Control Circuit Output Circuit SOA Protection Circuit ADJ or GND* PACKAGE DATA Therm al Lim it Circuit V OUT Current Lim it Circuit *Pin 1 is GND for fixed voltage versions Copyright © 2000 Rev. 2.0b, 2005-10-25 Microsemi Inc. Integrated Products Division 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 Page 2 LX8385x-xx ® TM 3A Low Dropout Positive Regulators P RODUCTION D ATA S HEET ELECTRICAL CHARACTERISTICS Parameter ` Symbol Min LX8385x-xx Typ Max Units LX8385-00 / 8385A-00 / 8385B-00 (ADJUSTABLE) Reference Voltage (Note 4) LX8385/85A-00 VREF LX8385B-00 Line Regulation (Note 2) Load Regulation (Note 2) Thermal Regulation Δ VREF (VIN) Δ VREF (IOUT) ΔVOUT (Pwr) Adjust Pin Current 1.238 1.250 1.262 V 1.225 1.250 1.270 V 1.240 1.250 1.260 V 1.238 1.250 1.262 V 1.5V < (VIN -VOUT), VIN < 7V, IOUT = 10mA 0.015 0.2 % VOUT > VREF, VIN - VOUT = 3V, 10mA < IOUT < 3A 0.15 0.5 % TA = 25°C, 20ms pulse 0.01 0.04 %/W 65 IADJ Adjust Pin Current Change (Note 4) Dropout Voltage IOUT = 10mA, TA = 25°C 10mA < IOUT < 3A, 1.5V < (VIN -VOUT), VIN < 10V, P < PMAX IOUT = 10mA, TA = 25°C 10mA < IOUT < 3A, 1.5V < (VIN -VOUT), VIN < 10V, P < PMAX VOUT = 5V, f= 120Hz, COUT = 100µF Tantalum, VIN = 6.5V, CADJ = 10µF, IOUT = 3A Ripple Rejection (Note 3) LX8385-00 LX8385A/85B-00 Minimum Load Current ` Test Conditions ΔIADJ ΔV IOUT(MIN) 55 100 µA 0.2 5 µA ΔVREF = 1%, IOUT = 3A 1.2 1.5 V ΔVREF = 1%, IOUT = 3A 1.1 1.3 V 2 10 mA 1 % VIN < 10V IOUT(MAX) (VIN - VOUT) < 7V, VIN < 10V Long Term Stability (Note 3) ΔVOUT(t) TA = 125°C, 1000 hours 3 VOUT LX8385B-33 Load Regulation (note 2) Thermal Regulation ΔVOUT (VIN) ΔVOUT (IOUT) ΔVOUT (Pwr) Ripple Rejection (note 3) Quiescent Current Dropout Voltage LX8385A/85B-33 Copyright © 2000 Rev. 2.0b, 2005-10-25 ΔV 0.25 % 0.003 % VIN = 5V, IOUT = 0mA, TA = 25°C 3.267 3.3 3.333 V 4.75V < VIN < 10V, 0mA < IOUT < 3A, P < PMAX 3.235 3.3 3.365 V VIN = 5V, IOUT = 0mA, TA = 25°C 3.274 3.3 3.326 V 4.75V < VIN < 10V, 0A < IOUT < 3A, P < PMAX 3.267 3.3 3.333 V 4.75V < VIN < 7V 1 6 mV 4.75V < VIN < 10V 2 10 mV VIN = 5V, 0mA < IOUT < IOUT(MAX) 5 15 mV 0.01 0.02 %/W TA = 25°C, 20ms pulse COUT = 100µF (Tantalum), IOUT = 3A IQ LX8385-33 A 60 0mA < IOUT < IOUT(MAX), 4.75V < V < 10V 83 dB 4 10 mA ΔVOUT = 1%, IOUT < IOUT(MAX) 1.2 1.5 V ΔVOUT = 1%, IOUT < IOUT(MAX) 1.1 1.3 V Microsemi Inc. Integrated Products Division 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 Page 3 ELECTRICALS Line Regulation (note 2) 3.5 0.3 Temperature Stability (Note 3) ΔVOUT(T) RMS Output Noise (% of VOUT) ΔVOUT(RMS) TA = 25°C, 10Hz < f < 10kHz (Note 3) LX8385-33/ 8385A-33/ 8385B-33 (3.3V FIXED) LX8385/85A-33 dB 10mA < IOUT < IOUT(MAX), 1.5V < (VIN -VOUT), VIN