LX8385B-XXCP

LX8385x-xx TM ® 3A Low Dropout Positive Regulators P RODUCTION D ATA S HEET DESCRIPTION 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. 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. KEY FEATURES W WW . Microsemi . C OM Three-Terminal Adjustable Or Fixed Output Guaranteed 1% Voltage Reference Accuracy Over Line, Load, And Temperature (LX8385B) Guaranteed < 1.5V Headroom At 3A (LX8385) Guaranteed < 1.3V Headroom At 3A (LX8385A/8385B) 0.015% Line Regulation 0.15% Load Regulation APPLICATIONS High Efficiency Linear Regulators Post Regulators For Switching Power Supplies Battery Chargers Constant Current Regulators Graphics & Standard Supplies Processor I/O Supply Low Voltage Memory & Chipset Supplies IMPORTANT: For the most current data, consult MICROSEMI’s website: http://www.microsemi.com PRODUCT HIGHLIGHT IN 5V + * 1500µF 6MV1500GX Sanyo LX8385A ADJ OUT 121 Ω 1% + 3.3V at 3A PART # LX8385/85A/85B-00 OUTPUT VOLTAGE Adjustable 3.3V 5.0V 1500µF 2x 6MV1500GX Sanyo LX8385/85A/85B-33 LX8385/85A/85B-05 200 Ω 1% Table 1 - Available Options 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 Transition DC: 0532 Transition DC: 0543 LX8385X LX8385X DD Plastic TO-263 3-Pin RoHS Compliant Transition DC: 0535 0 to 125 -25 to 125 2.0% 2.0% 1.0% 2.0% 1.5V 1.3V 1.3V 1.5V 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 ABSOLUTE MAXIMUM RATINGS (NOTE 1) 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) 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. PACKAGE PIN OUT TAB is V OUT 3 W WW . Microsemi . C OM V IN V OUT ADJ / GND* 2 1 DD PACKAGE (3-PIN) (Top View) TAB is V OUT 3 V IN V OUT ADJ/ GND* THERMAL DATA 2 DD Plastic TO-263 3-Pin THERMAL RESISTANCE-JUNCTION TO AMBIENT, θJA THERMAL RESISTANCE-JUNCTION TO TAB, θJT Plastic TO-220 3-Pin THERMAL RESISTANCE-JUNCTION TO AMBIENT, θJA THERMAL RESISTANCE-JUNCTION TO TAB, θJT 1 60°C/W 2.7°C/W 60°C/W 2.7°C/W 60°C/W 2.7°C/W DT PACKAGE (3-PIN) (Top View) T AB is V OUT 3 P V IN V OUT ADJ / GND* 2 1 DT Plastic TO-252 3-Pin THERMAL RESISTANCE-JUNCTION TO AMBIENT, θJA THERMAL RESISTANCE-JUNCTION TO TAB, θJT P PACKAGE (3-PIN) (Top View) *Pin 1 is GND for fixed voltage versions RoHS 100% Matte Tin Lead Finish 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. BLOCK DIAGRAM V IN Bias Circuit T herm al Lim it Circuit Bandgap Circuit Control Circuit Output Circuit SOA Protection Circuit V OUT PACKAGE DATA PACKAGE DATA ADJ or GND* *Pin 1 is GND for fixed voltage versions Current Lim it Circuit 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 W WW . Microsemi . C OM Unless otherwise specified, the following specifications apply over the operating ambient temperature for the LX8385x-xxC with 0°C ≤ TA ≤ 125°C and the LX8385-xxI with -25°C ≤ TA ≤ 125°C except where otherwise noted. Test conditions: VIN -VOUT = 3V; IOUT = 3A. Low duty cycle pulse testing techniques are used which maintains junction and case temperatures equal to the ambient temperature. Parameter Symbol Test Conditions LX8385x-xx Typ Max 1.250 1.250 1.250 1.250 0.015 0.15 0.01 65 83 55 10mA < IOUT < IOUT(MAX), 1.5V < (VIN -VOUT), VIN VREF, VIN - VOUT = 3V, 10mA < IOUT < 3A TA = 25°C, 20ms pulse VOUT = 5V, f= 120Hz, COUT = 100µF Tantalum, VIN = 6.5V, CADJ = 10µF, IOUT = 3A 1.238 1.225 1.240 1.238 V V V V % % %/W dB µA µA V V mA A % % % 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) Output Voltage (Note 4) LX8385/85A-33 VOUT LX8385B-33 ΔVOUT (VIN) ΔVOUT (IOUT) ΔVOUT (Pwr) IQ LX8385-33 LX8385A/85B-33 ΔV VIN = 5V, IOUT = 0mA, TA = 25°C 4.75V < VIN < 10V, 0mA < IOUT < 3A, P < PMAX VIN = 5V, IOUT = 0mA, TA = 25°C 4.75V < VIN < 10V, 0A < IOUT < 3A, P < PMAX 4.75V < VIN < 7V 4.75V < VIN < 10V VIN = 5V, 0mA < IOUT < IOUT(MAX) TA = 25°C, 20ms pulse COUT = 100µF (Tantalum), IOUT = 3A 0mA < IOUT < IOUT(MAX), 4.75V < V < 10V ΔVOUT = 1%, IOUT < IOUT(MAX) ΔVOUT = 1%, IOUT < IOUT(MAX) 60 3.267 3.235 3.274 3.267 3.3 3.3 3.3 3.3 1 2 5 0.01 83 4 1.2 1.1 3.333 3.365 3.326 3.333 6 10 15 0.02 V V V V mV mV mV %/W dB Line Regulation (note 2) Load Regulation (note 2) Thermal Regulation Ripple Rejection (note 3) Quiescent Current Dropout Voltage ELECTRICALS ELECTRICALS 10 1.5 1.3 mA V V 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 3 LX8385x-xx TM ® 3A Low Dropout Positive Regulators P RODUCTION D ATA S HEET ELECTRICAL CHARACTERISTICS (CONTINUED) W WW . Microsemi . C OM Unless otherwise specified, the following specifications apply over the operating ambient temperature for the LX8385x-xxC with 0°C ≤ TA ≤ 125°C and the LX8385-xxI with -25°C ≤ TA ≤ 125°C except where otherwise noted. Test conditions: VIN -VOUT = 3V; IOUT = 3A. Low duty cycle pulse testing techniques are used which maintains junction and case temperatures equal to the ambient temperature. Parameter Symbol Test Conditions LX8385x-xx Typ Max 3.5 0.25 TA=125°C, 1000 hours TA=25°C, 10Hz < f < 10kHz 0.3 0.003 1 Min 3 Units LX8385-33 / 8385A-33 / 8385B- (3.3V FIXED)(CONTINUED) Maximum Output Current Temperature Stability (Note 3) Long Term Stability (Note 3) RMS Output Noise (% of VOUT) (Note 3) IOUT(MAX) ΔVOUT(T) ΔVOUT (t) VOUT (RMS) VIN < 7V A % % % LX8385-05 / 8385A-05 / 8385B-05 (5.0V FIXED) Output Voltage (Note 4) LX8385/85A-05 VOUT LX8385B-05 Line Regulation (Note 2) Load Regulation (Note 2) Thermal Regulation Ripple Rejection (Note 3) Quiescent Current Dropout Voltage LX8385-33 LX8385A/85B-33 Maximum Output Current Temperature Stability (Note 3) Long Term Stability (Note 3) RMS Output Noise (% of VOUT) (Note 3) IQ ΔV IOUT(MAX) ΔVOUT (T) ΔVOUT (t) VOUT (RMS) TA=125°C, 1000 hours TA=25°C, 10Hz < f < 10kHz VIN=7V, IOUT=0mA, TA=25°C 7V < VIN < 10V, 0mA < IOUT < 3A, P < PMAX VIN=7V, IOUT=0mA, TA=25°C 7V < VIN < 10V, 0mA < IOUT < 3A, P < PMAX ΔVOUT(VIN) 7V < VIN < 10V ΔVOUT (IOUT) ΔVOUT (Pwr) VIN=7V, 0mA < IOUT < IOUT(MAX) TA=25°C, 20ms pulse COUT=100µF (Tantalum), IOUT=3A 0mA < IOUT < IOUT(MAX), 4.75V < VIN < 10V ΔVOUT=1%, IOUT < IOUT(MAX) ΔVOUT=1%, IOUT < IOUT(MAX) VIN < 10V 3 60 4.950 4.900 4.960 4.950 5.00 5.00 5.00 5.00 2 5 0.01 83 4 1.2 1.1 3.5 0.25 0.3 0.003 1 10 1.5 1.3 5.050 5.100 5.040 5.050 10 25 0.02 V V V V mV mV %/W dB mA V V A % % % Note 2 Note 3 Note 4 Regulation is measured at constant junction temperature, using pulse testing with a low duty cycle. Changes in output voltage due to heating effects are covered under the specification for thermal regulation. These parameters, although guaranteed are not tested in production. See Maximum Output Current Section ELECTRICALS ELECTRICALS 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 4 LX8385x-xx TM ® 3A Low Dropout Positive Regulators P RODUCTION D ATA S HEET APPLICATION NOTES W WW . Microsemi . C OM The LX8385/85A/85B Series ICs are easy to use LowDropout (LDO) voltage regulators. They have all of the standard self-protection features expected of a voltage regulator: short circuit protection, safe operating area protection and automatic thermal shutdown if the device temperature rises above approximately 165°C. Use of an output capacitor is REQUIRED with the LX8385/85A/85B series. Please see the table below for recommended minimum capacitor values. These regulators offer a more tightly controlled reference voltage tolerance and superior reference stability when measured against the older pin-compatible regulator types that they replace. STABILITY The output capacitor is part of the regulator’s frequency compensation system. Many types of capacitors are available, with different capacitance value tolerances, capacitance temperature coefficients, and equivalent series impedances. For all operating conditions, connection of a 220µF aluminum electrolytic capacitor or a 47µF (