A M I C R O S E M I C O M P A N Y LX8630-xx 3A BiCMOS Very Low Dropout Regulators P RODUCTION D ATA S HEET shutd device will enter shutdown mode when the ENABLE pin is pulled low. Thermal and Short-Circuit Current Limiting: the LX8630 limits the current when the output is shorted, protecting the sensitive load circuits. The device will also turn off if the junction temperature exceeds 150° Available in Popular TO-220 and TO-263 Power Packages: adjustable versions have five leads, and fixed output voltage devices are supplied in three lead packages. Dropout Voltage Typically 450mV at 3A and 50mV at 10mA Low Quiescent Current, Typically Under 400µA, irrespective of Load Shutdown Current 10µA Adjustable Output Version in 5-Pin TO-220 & TO-263 Packages Low Reverse Leakage Current Short-Circuit and Thermal Shutdown Protection W W W . Microsemi . COM The LX8630 family are positive very They are low dropout regulators. designed to provide a power supply for very low headroom applications, such as 3.3V – 2.5V. BiCMOS technology allows an effective series pass element resistance, RDS(ON) of 150m dropout voltage of 450mV at 3A. Low Quiescent Current and LogicControlled Shutdown help conserve battery life and increase system efficiency. Typical quiescent current is under 400A irrespective of load current, while the 3.3V & 2.5V Supplies for Memory, Microprocessors, Clock Circuits, Etc. Portable Equipment IMPORTANT: For the most current data, consult MICROSEMI’s website: http://www.microsemi.com LX8630-xx S im plified B lock D iagram V OUT V IN Current Lim it Reference Current RA Charge P um p A D J* RB 1.25 V ENABLE* GND V IN /2 RB RA Reverse V oltage S ense Therm al S hutdown LX 8630 -00 - - LX 8630 -25 25K 25K LX 8630 -33 41K 25K TA (°C) Output Voltage 0 to 125 3.3 2.5 ADJ(00) P Plastic TO-220 P Plastic TO-220 DD Plastic TO-263 DD Plastic TO-263 3-Pin 5-Pin 3-Pin 5-Pin LX8630-33CP LX8630-25CP - LX8630-00CP LX8630-33CDD LX8630-25CDD - LX8630-00CDD Note: Available in Tape & Reel. Append the letter “T” to the part number. (i.e. LX8630-33CDDT) Copyright 2000 Rev. 1.0,2000-09-28 Microsemi Linfinity Microelectronics Division 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 Page 1 LX8630-XX * Adjustable 5 lead version on ly A M I C R O S E M I LX8630-xx 3A BiCMOS Very Low Dropout Regulators C O M P A N Y P RODUCTION D ATA S HEET Input Voltage (VIN).......................................................................................................6.5V Enable Pin..............................................................................................-0.3V to V IN +0.3V Operating Junction Temperature Plastic (P & DD Packages) ................................................................................... 150°C Storage Temperature Range ........................................................................-65°C to 150°C Lead Temperature (Soldering, 10 seconds) ............................................................... 300°C Note: TAB is GND 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 VOUT 2 GND 1 VIN DD PACKAGE (3-PIN) (Top View) P W W W . Microsemi . COM TAB is GND PACKAGE: (3-PIN) THERMAL RESISTANCE-JUNCTION TO TAB, θJT THERMAL RESISTANCE-JUNCTION TO AMBIENT, 2.1°C/W θJA 5 VOUT 4 ADJ 3 GND 2 ENABLE 1 60°C/W VIN DD PACKAGE (5-PIN) (Top View) P PACKAGE: (5-PIN) THERMAL RESISTANCE-JUNCTION TO TAB, θJT THERMAL RESISTANCE-JUNCTION TO AMBIENT, DD θJA TAB is GND 60°C/W PACKAGE: (3-PIN) THERMAL RESISTANCE-JUNCTION TO TAB, θJT THERMAL RESISTANCE-JUNCTION TO AMBIENT, DD 2.1°C/W 2.1°C/W θJA 5 VOUT 4 ADJ 3 GND 2 ENABLE 1 VIN P PACKAGE (5-PIN) (Top View) 60°C/W TAB is GND PACKAGE: (3-PIN) THERMAL RESISTANCE-JUNCTION TO TAB, θJT THERMAL RESISTANCE-JUNCTION TO AMBIENT, 3 VOUT 2 GND 1 VIN 2.1°C/W θJA 60°C/W Copper Area (Topside)* Copper Area (Backside)* Board Area 2.5 sq” (1613mm2) 1.0 sq” (645 mm2) 0.17 sq” (110 mm2) 2.5 sq” (1613mm2) 2.5 sq” (1613mm2) 2.5 sq” (1613mm2) 2.5 sq” (1613mm2) 2.5 sq” (1613mm2) 2.5 sq” (1613mm2) P PACKAGE (3-PIN) (Top View) PACKAGE DATA Junction Temperature Calculation: TJ = TA + (PD x θJA). The θJA numbers are guidelines for the thermal performance of the device/pc-board system. All of the above assume no ambient airflow. θJA can be improved with package soldered to 0.5IN2 copper area over backside • ground plane or internal power plane. θJA can vary from 20°C/W to > 40°C/W depending on mounting technique. See table below for thermal resistance guidelines: Thermal Resistance (θJA) 25°C/W 27°C/W 35°C/W *Tab of device attached to topside copper Copyright 2000 Rev. 1.0,2000-09-28 Microsemi Linfinity Microelectronics Division 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 Page 2 A M I C R O S E M I VOUT P RODUCTION D ATA S HEET VIN 3A BiCMOS Very Low Dropout Regulators C O M P A N Y ! !! source is further than 1 inch from the device. " # !$$%% & '( )% regulation, rather it is needed for transient response. Size your output capacitor to meet the transient loading requirement. If you have a very dynamic load, a larger capacitor will improve the response to these load steps. GND Reference ground. The input and output bypass capacitors should be connected to this pin. The tab on the TO220 and TO-263 packages along with the ground pin are also used for heatsinking the device. ADJ Feedback pin for the regulator. For the LX8630-00, the output voltage can be set by two external resistors with the following relationship: VOUT = 1.25V * (1+RA/RB) where RA is the resistor connected between VOUT and ADJ, RB is the resistor connected between ADJ and GND pin. ENABLE Enable input. For the LX8630-00, this pin has a threshold of about V IN/2, it should be actively pulled high to enable the regulator. This can be accomplished with a resistive pull-up. When low, it turns off the regulator and puts the device in a low current shutdown state. W W W . Microsemi . COM LX8630-xx VIN 1 VIN VOUT LX8630-00 CIN ENABLE 2 GND VOUT 5 RA ADJ 4 COUT 3 VREF RB RA RB VOUT = VREF 1 + Copyright 2000 Rev. 1.0,2000-09-28 PIN DESCRIPTION FIGURE 1 – Typical Application Microsemi Linfinity Microelectronics Division 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 Page 3 A M I C R O S E M I C O M P A N Y LX8630-xx 3A BiCMOS Very Low Dropout Regulators P RODUCTION D ATA S HEET PARAMETER SYMBOL INPUT VOLTAGE MIN. VIN TYP. MAX. UNITS 3.0 5.5 V LOAD CURRENT (WITH ADEQUATE HEATSINKING) 0.01 3 A INPUT CAPACITOR (VIN TO GND) 10 100 OUTPUT CAPACITOR (VOUT TO GND) 22 220* * Size your output capacitor to meet the transient loading requirement. If you have a very dynamic load, a larger capacitor will improve the response to these load steps (see charts 2&3) W W W . Microsemi . COM (Unless otherwise specified, the following specifications apply over the operating ambient temperatures for the LX8630-xxC with 0°C ≤ TA ≤ 125°C; VIN = VOUT + 1.5V; IOUT = 10mA; CIN = 10* +OUT , * -J = TA. Test conditions: Low duty cycle pulse testing techniques are used which maintains junction and case temperatures equal to the ambient temperature.) Parameter Test Conditions Min LX8630-xx Typ Max Units LX8630-33 FIXED 3.3V, 3A Output Voltage VOUT Line Regulation Load Regulation VREG IREG Dropout Voltage (VDO = VIN - VOUT) VDO TJ = 25°C 3.25 Over Temperature 3.22 3.35 3.38 2 18 8 40 IOUT = 3A, OUT = -1% 0.4 0.6 0.3 0.4 IOUT = 10mA, OUT = -1% 0.05 0.15 IOUT = 1.5A, OUT = -1% ISC VOUT = 0V Quiescent Current IQ IOUT = 10mA to 3A IREV 3.3 VIN = 3.9V to 5.5V IOUT = 10mA to 3 A Short Circuit Current Reverse Leakage Current Symbol 5 6.5 400 600 V mV mV V A . . 0V < VIN < VOUT, VOUT < 3.4V (at VOUT) 0V < VIN < VOUT, VOUT < 3.4V (at VIN) 50 0 650 -50 TJ = 25°C 2.46 2.5 2.54 Over Temperature 2.44 2.5 2.56 2 6 mV mV mA LX8630-25 FIXED 2.5V, 3A Output Voltage VOUT Line Regulation VREG Load Regulation IREG VDO IOUT = 10mA to 3 A 14 30 IOUT = 3A, OUT = -1%, TJ = 85°C 0.4 0.6 IOUT = 1.5A, OUT = -1% 0.3 0.45 IOUT = 10mA, OUT = -1% 0.05 0.15 Short Circuit Current ISC VOUT = 0V Quiescent Current IQ IOUT = 10mA to 3A Reverse Leakage Current Copyright 2000 Rev. 1.0,2000-09-28 IREV 0V < VIN < VOUT, VOUT < 2.6V (at VOUT) 0V < VIN < VOUT, VOUT < 2.6V (at VIN) -50 Microsemi Linfinity Microelectronics Division 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 5 6.5 400 600 50 0 650 V A . . mA Page 4 ELECTRICALS Dropout Voltage (VDO = VIN - VOUT) VIN = 3.1V to 5.5V V A M I C R O S E M I LX8630-xx 3A BiCMOS Very Low Dropout Regulators C O M P A N Y P RODUCTION D ATA S HEET Parameter Symbol LX8630-xx Min Typ Max Test Conditions Units LX8630-00 ADJUSTABLE OUTPUT, 3A (Note 2) Reference Voltage VREF Line Regulation VREG Load Regulation IREG TJ = 25°C 1.23 1.25 1.27 Over Temperature 1.22 1.25 1.28 2 4 mV mV VIN = (VO + 0.6V) to 5.5V @ ADJ Pin (Note 1) IOUT = 10mA to 3A @ ADJ Pin IOUT = 3A, OUT = -1%, TJ = 85°C 7 15 0.4 0.6 Dropout Voltage VDO IOUT = 1.5A, OUT = -1% 0.3 0.45 IOUT = 10mA, OUT = -1% 0.05 0.15 Short Circuit Current ISC VOUT = 0V 5 6.5 Quiescent Current IQ IOUT = 10mA to 3A 400 600 50 650 Reverse Leakage Current IREV Bias Current at ADJ Pin IBIAS Shutdown Threshold Shutdown Current Note 1: VIN min. VSD ISD 0V < VIN < VOUT, VOUT < 5.5V (at VOUT) 0V < VIN < VOUT, VOUT < 5.5V (at VIN) -50 0.8 VENABLE < 0.8V V V A . . 0 mA 100 nA (VIN/2) 10 W W W . Microsemi . COM V 25 . Note 2: LX8630-00 Electrical Characteristics are Preliminary Only. 300 V-Dropout (mV) 250 200 +125 150 +25 -25 100 ELECTRICALS 50 0 0.1 0.5 1.0 1.5 2.0 2.5 3.0 Current Load (Amps) CHART 1 – Dropout Voltage vs. Output Current (Typical – LX8630-33CCD) Copyright 2000 Rev. 1.0,2000-09-28 Microsemi Linfinity Microelectronics Division 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 Page 5 A M I C R O S E M I C O M P A N Y LX8630-xx 3A BiCMOS Very Low Dropout Regulators P RODUCTION D ATA S HEET W W W . Microsemi . COM VIN= 3.3V CHAN 1 (TOP TRACE): VOUT 50mV/DIV at 2.5VDC CHAN 3 (LOWER TRACE): I OUT 1A/DIV with 10mA preload current Input Cap: 1 6MVGX 1500µF Sanyo Cap Output Caps: 2 6MVGX 1500µF Sanyo Cap VIN= 5.0V CHAN 1 (TOP TRACE): VOUT 50mV/DIV at 2.5VDC CHAN 3 (LOWER TRACE): I OUT 1A/DIV with 10mA preload current Input Cap: 1 6MVGX 1500µF Sanyo Cap Output Caps: 2 6MVGX 1500µF Sanyo Cap Copyright 2000 Rev. 1.0,2000-09-28 Microsemi Linfinity Microelectronics Division 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 GRAPHS CHART 2 & 3 – LX8630-00CCD Transient Response Note: Adjustable Resistors 10K Ohms Each Page 6 A M I C R O S E M I LX8630-xx 3A BiCMOS Very Low Dropout Regulators C O M P A N Y P RODUCTION D ATA S HEET W W W . Microsemi . COM 3-Pin Plastic TO-263 DD I A D Dim C A B C D E F G H I J K M N B K M N H F E G 0 ° -8 ° MILLIMETERS MIN MAX 10.03 10.67 8.51 9.17 4.19 4.59 1.14 1.40 0.330 0.51 1.19 1.34 2.41 2.66 2.29 2.79 – 1.65 0 0.25 14.60 15.87 7° 3° INCHES MIN MAX 0.395 0.420 0.335 0.361 0.165 0.181 0.045 0.055 0.013 0.020 0.047 0.053 0.095 0.104 0.090 0.110 – 0.065 0 0.010 0.575 0.625 7° 3° MILLIMETERS MIN MAX 10.03 10.67 8.51 9.17 4.19 4.59 1.14 1.40 0.330 0.51 0.74 0.89 1.57 1.83 2.29 2.79 – 1.65 0 0.25 14.60 15.87 7° 3° INCHES MIN MAX 0.395 0.420 0.335 0.361 0.165 0.181 0.045 0.055 0.013 0.020 0.029 0.035 0.062 0.072 0.090 0.110 – 0.065 0 0.010 0.575 0.625 7° 3° J S e a tin g P la n e 5-Pin Plastic TO-263 DD I A D Dim C B K M N H F 0° -8° E G Note: J 1. Dimensions do not include mold flash or protrusions; these shall not exceed 0.155mm(.006”) on any side. Lead dimension shall not include solder coverage. S e a tin g P la n e Copyright 2000 Rev. 1.0,2000-09-28 MECHANICALS A B C D E F G H I J K M N Microsemi Linfinity Microelectronics Division 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 Page 7 A M I C R O S E M I C O M P A N Y LX8630-xx 3A BiCMOS Very Low Dropout Regulators P RODUCTION D ATA S HEET W W W . Microsemi . COM 3-Pin Plastic TO-220 P B S Dim F T Q A B C D F G H J K L N Q R S T U U A C 1 2 3 R H K D L J MILLIMETERS MIN MAX 14.22 15.88 9.65 10.67 3.56 4.83 0.51 1.14 3.53 4.09 2.54 BSC 6.35 0.30 1.14 12.70 14.73 1.14 1.27 5.08 TYP 2.54 3.05 2.03 2.92 1.14 1.40 5.84 6.86 0.508 1.14 INCHES MIN MAX 0.560 0.625 0.380 0.420 0.140 0.190 0.020 0.045 0.139 0.161 0.100 BSC 0.250 0.012 0.045 0.500 0.580 0.045 0.050 0.200 TYP 0.100 0.120 0.080 0.115 0.045 0.055 0.230 0.270 0.020 0.045 MILLIMETERS MIN MAX 14.23 16.51 9.66 10.66 3.56 4.82 0.46 0.89 3.56 4.06 3.40 0.31 1.14 12.70 14.73 6.80 TYP 2.04 2.92 1.14 1.39 5.85 6.85 INCHES MIN MAX 0.560 0.650 0.380 0.420 0.140 0.190 0.018 0.035 0.140 0.160 0.134 0.012 0.045 0.500 0.580 0.268 TYP 0.080 0.115 0.045 0.055 0.230 0.270 G N 5-Pin Plastic TO-220 P B S Dim F T A 1 C 5 R K D J Note: 1. Dimensions do not include mold flash or protrusions; these shall not exceed 0.155mm(.006”) on any side. Lead dimension shall not include solder coverage. G N Copyright 2000 Rev. 1.0,2000-09-28 MECHANICALS A B C D F G J K N R S T Microsemi Linfinity Microelectronics Division 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 Page 8 A M I C R O S E M I C O M P A N Y LX8630-xx 3A BiCMOS Very Low Dropout Regulators P RODUCTION D ATA S HEET W W W . Microsemi . COM NOTES PRODUCTION DATA – Information contained in this document is proprietary to LinFinity and is current as of publication date. This document may not be modified in any way without the express written consent of LinFinity. Product processing does not necessarily include testing of all parameters. LinFinity reserves the right to change the configuration and performance of the product and to discontinue product at any time. Copyright 2000 Rev. 1.0,2000-09-28 Microsemi Linfinity Microelectronics Division 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 Page 9