LX8585-xx / LX858A-xx ® TM 4.6A Low Dropout Positive Regulators P RODUCTION D ATA S HEET KEY FEATURES DESCRIPTION Three Terminal Adjustable or Fixed Output Guaranteed < 1.2V headroom @ 4.6A (LX8585A) Guaranteed < 1.4V headroom @ 4.6A (LX8585) Guaranteed < 1.3V Headroom @ 3A Output Current of 4.6A Minimum Fast Transient Response 1% Voltage Reference Initial Accuracy Output Short Circuit Protection Built-In Thermal Shutdown bs ol et e short-circuit current. On-chip thermal limiting provides protection against any possible overload that would create excessive junction temperatures. The LX8585/85A family is available in both through-hole and surface-mount versions of the industry standard 3-pin TO-220 / TO-263 power packages. The LX1431 Programmable Reference and LX8585A Series products offer precision output voltage and are ideal for use in VRE applications (see application below). For higher current applications, see the LX8584 data sheet. APPLICATIONS Pentium Processor Supplies Power PC Supplies Microprocessor Supplies Low Voltage Logic Supplies Battery Powered Circuit Post Regulator for Switching Supply CYRIX® 6x86™ Supplies AMD-K5™ Supplies IMPORTANT: For the most current data, consult MICROSEMI’s website: http://www.microsemi.com PRODUCT HIGHLIGHT THE A PPLICATION OF THE LX8585A & LX1431 IN A 75 & 166 MHZ P54C P ROCESSORS USING 5V CACHE 3 5V WWW . Microsemi .C OM The LX8585/85A Series ICs are low dropout three-terminal regulators with a minimum of 4.6A output current. Pentium® Processor and Power PCTM applications requiring fast transient response are ideally suited for this product family. The LX8585A is guaranteed to have < 1.2V at 4.6A, while the LX8585 are specified for 1.4V, making them ideal to provide well regulated outputs of 2.5V to 3.6V using a 5V input supply. Fixed versions are also available and specified in the Available Options table below. Current limit is trimmed above 4.6A to ensure adequate output current and controlled VIN VO 4.6A (See Table Below) 2 VOUT LX8585A Part 2x 330 µ F, 6.3V Low ESR Oscon Type from Sanyo 1k Ω ADJ 1k Ω 1 0.01 µF 100 µ F x 6 10V AVX TYPE TPS 250pF 1 2 3 220 µF 10V Low ESR from Sanyo 1k COL V+ REF LX1431 Part 0.1 µF 50V SGND 0.1% 8 2.84k Ω 0.1% Available Options Per Part Number Part # Output Voltage LX8585/85A-00 Adjustable LX8585/85A-15 1.5V LX8585/85A-33 3.3V µP Load Other voltage options may be available. Please contact factory for details. 21k 1% 1 µ F x 10 SMD JP1 FGND 6 O 5 PLACE IN µP SOCKET CAVITY VOUT 3.50 3.38 JP1 Short Open Typical Application 120 / 166MHz, VRE, 5V Cache 75/90/100/133MHz, STND, 5V Cache LX8585 Thick traces represent high current traces which must be low resistance / low inductance traces in order to achieve good transient response. PACKAGE ORDER INFO TA (°C) Dropout Voltage 0 to 125 1.4V 1.2V P Plastic TO-220 3-Pin DD Plastic TO-263 3-Pin RoHS Compliant Transition DC: 0543 RoHS Compliant Transition DC: 0535 LX8585-xxCP LX8585A-xxCP LX8585-xxCDD LX8585A-xxCDD Note: Available in Tape & Reel. Append the letters “TR” to the part number. (i.e. LX8585-15CDD-TR) Copyright © 1997 Rev. 2.2a, 2005-11-10 Microsemi Integrated Products Division 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 Page 1 LX8585-xx / LX858A-xx ® TM 4.6A Low Dropout Positive Regulators P RODUCTION D ATA S HEET ABSOLUTE MAXIMUM RATINGS PACKAGE PIN OUT TAB is GND 3 VIN 2 VOUT 1 ADJ/GND* P PACKAGE (Top View) TAB is GND 3 VIN 2 VOUT 1 ADJ / GND* bs ol et e Note: 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. THERMAL DATA WWW . Microsemi .C OM Power Dissipation ....................................................................................Internally Limited Input Voltage .................................................................................................................10V Input to Output Voltage Differential..............................................................................10V Maximum Operating Junction Temperature .............................................................. 150°C Storage Temperature Range.........................................................................-65°C to 150°C Peak Package Temp. for Solder Reflow (40 seconds max. exposure)............ 260°C (+0 -5) DD PACKAGE P (Top View) PlasticTO-220 3-Pin THERMAL RESISTANCE-JUNCTION TO TAB, θJT THERMAL RESISTANCE-JUNCTION TO AMBIENT, θJA DD 3.0°C/W 60°C/W * Pin 1 is GND for fixed voltage versions RoHS 100% Matte Tin Lead Finish Plastic TO-263 3-Pin THERMAL RESISTANCE-JUNCTION TO TAB, θJT THERMAL RESISTANCE-JUNCTION TO AMBIENT, θJA 3.0°C/W 60°C/W Copyright © 1997 Rev. 2.2a, 2005-11-10 PACKAGE DATA O 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. Microsemi Integrated Products Division 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 Page 2 LX8585-xx / LX858A-xx ® TM 4.6A Low Dropout Positive Regulators P RODUCTION D ATA S HEET ELECTRICAL CHARACTERISTICS Parameter ` Symbol Min 70°C except where LX8585/85A Typ Max Units LX8585-00 / 8585A-00 (ADJUSTABLE) Reference Voltage IOUT = 10mA, TA = 25°C 10mA < IOUT < 4.6A, 1.5V < (VIN – VOUT), VIN < 7V, P < PMAX ∆VREF(VIN) IOUT = 10mA, 1.5V < (VIN – VOUT), VIN < 7V VREF(IOUT) VIN – VOUT = 3V, 10mA < IOUT < 4.6V ∆VOUT (Pwr) TA = 25°C, 20ms pulse VOUT = 3.3V, f = 120Hz, COUT = 100µF Tantalum, VIN = 5V, CADJ = 10µF, TA = 25°C, IOUT = 4.6V IADJ 10mA < IOUT < 4.6A, 1.5V < (VIN – VOUT), ∆IADJ VIN < 7V ∆VREF = 1%, IOUT = 4.6A ∆V ∆VREF = 1%, IOUT = 3A ∆VREF = 1%, IOUT = 4.6A IOUT(MIN) VIN < 7V IOUT(MAX) 1.4V < (VIN – VOUT), VIN < 7V ∆VOUT(t) ∆VOUT(t) TA = 125°C, 1000hrs VREF 1.238 1.250 1.262 1.225 1.250 1.275 0.035 0.1 0.01 0.20 0.5 0.02 V bs ol et e Line Regulation (Note 2) Load Regulation (Note 2) Thermal Regulation Ripple Rejection (Note 3) Adjust Pin Current Adjust pin Current Change Dropout Voltage LX8585 LX8585A ` Test Conditions ≤ Minimum Load Current Maximum Output Current (Note 4) Temperature Stability (Note 3) Long Term Stability (Note 3) RMS Output Noise (% of VOUT)(Note 3) LX8585-15 / 8585A-15 (1.5V FIXED) Output Voltage (Note 4) Line Regulation (Note 2) Load Regulation (Note 2) Thermal Regulation (Note 3) Ripple Rejection (Note 3) Quiescent Current Dropout Voltage LX8585-15 VOUT VOUT(RMS) 83 55 TA = 125°C, 10Hz < f < 10kHz VIN = 5V, IOUT = 0mA, TA = 25°C 4.75 < VIN < 10V, 0mA < IOUT < 7A, TA = 25°C, P < PMAX 4.75 < VIN < 7V ∆VOUT (VIN) 4.75V < VIN < 10V ∆VOUT(IOUT) VIN = 5V, 10mA < IOUT < IOUT(MAX) ∆VOUT(Pwr) TA = 25°C, 20ms pulse COUT = 100µF (Tantalum), IOUT = 4.6A, TA = 25°C IQ 0mA < IOUT < IOUT(MAX), 4.75V < VIN < 10V ∆VOUT = 1%, IOUT < IOUT(MAX), VIN - VOUT < 7V ∆V ∆VOUT = 1%, IOUT < 3A, VIN - VOUT < 7V ∆VOUT = 1%, IOUT < IOUT(MAX), VIN - VOUT < 7V ∆VOUT(T) ∆VOUT(t) TA = 125°C, 1000hrs O LX8585A-15 Temperature Stability (Note 3) Long Term Stability (Note 3) RMS Output Noise (% of VOUT)(NOTE 3) VOUT(RMS) 60 µA 0.2 5 µA 1.2 1.1 1.1 2 4.6 0.25 0.3 1.4 1.3 1.2 10 6 1 1.485 1.50 1.515 1.470 1.50 1.530 1 1 2.5 0.01 3 5 7 0.02 TA = 25°C, 10Hz < f < 10kHz dB 100 0.003 65 % % %/W 83 4 1.2 1.1 1.1 0.25 0.3 0.003 10 1.4 1.3 1.2 1 V mA A % % % V mV mV %/W dB mA V % % % Microsemi Integrated Products Division 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 ELECTRICALS Note 2: 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 regulations. Note 3: These parameters, although guaranteed, are not tested in production. Note 4: IOUT(MAX) is measured under the condition that VOUT is forced below its nominal value by 100mV. Copyright © 1997 Rev. 2.2a, 2005-11-10 WWW . Microsemi .C OM Unless otherwise specified, the following specifications apply over the operating ambient temperature 0°C ≤ TA otherwise noted and the following test conditions:. Page 3 LX8585-xx / LX858A-xx ® TM 4.6A Low Dropout Positive Regulators P RODUCTION D ATA S HEET APPLICATION CIRCUITS VIN IN 10µF LX8585/85A OUT ADJ R1 121Ω 1% R2 365 Ω 1% VOUT VIN IN (Note A) 150 µF C1 10µF* LX8585/85A OUT ADJ C1* 10µF VOUT** R1 121Ω R2 1k C2 100µF bs ol et e * C1 improves ripple rejection. X C should be ≈ R1 at ripple frequency. 5V Figure 1 – Improving Ripple Rejection Needed if device is far from filter capacitors. WWW . Microsemi .C OM (Note A) ** VOUT = 1.25V 1 + R2 R1 Figure 2 – 1.2V – 8V Adjustable Regulator LX8585/85A OUT IN ADJ VIN (Note A) 5V 121Ω 1% 100µF 10µF 1k TTL Output 2N3904 1k 365Ω 1% Figure 3 – 5V Regulator With Shutdown LX8585-33/85A-33 IN OUT GND 10µF Tantalum or 100µF Aluminum 3.3V Min. 15µF Tantalum or 100µF Aluminum capacitor. May be increased without limit. ESR must be less than 50mΩ. APPLICATIONS O VIN Figure 4 – Fixed 3.3V Output Regulator Note A: VIN(MIN) = (Intended VOUT) + (VDROPOUT(MAX)) Copyright © 1997 Rev. 2.2a, 2005-11-10 Microsemi Integrated Products Division 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 Page 4 LX8585-xx / LX858A-xx ® TM 4.6A Low Dropout Positive Regulators P RODUCTION D ATA S HEET APPLICATION NOTE IN LX8585/85A OUT ADJ Minumum Load (Larger resistor) Full Load (Smaller resistor) RDSON<< RL 1 sec Star Ground 10ms Figure 5 – Dynamic Input & Output Test Output 15µF Tantalum, 100µF Aluminum 47µF Tantalum, 220µF Aluminum Adj None 15µF O To ensure good transient response from the power supply system under rapidly changing current load conditions, designers generally use several output capacitors connected in parallel. Such an arrangement serves to minimize the effects of the parasitic resistance (ESR) and inductance (ESL) that are present in all capacitors. Cost effective solutions that sufficiently limit ESR and ESL effects generally result in total capacitance values in the range of hundreds to thousands of microfarads, which is more than adequate to meet regulator output capacitor specifications. Output capacitance values may be increased without limit. The circuit shown in Figure 5 can be used to observe the transient response characteristics of the regulator in a power system under changing loads. The effects of different capacitor types and values on transient response parameters, such as overshoot and undershoot, can be compared quickly in order to develop an optimum solution. Copyright © 1997 Rev. 2.2a, 2005-11-10 Microsemi Integrated Products Division 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 Page 5 APPLICATIONS OVERLOAD RECOVERY Like almost all IC power regulators, the LX8585/85A regulators are equipped with Safe Operating Area (SOA) protection. The SOA circuit limits the regulator's maximum output current to progressively lower values as the input-to-output voltage difference increases. By limiting the maximum output current, the SOA circuit keeps the amount of power that is dissipated in the regulator itself within safe limits for all values of input-to-output voltage within the operating range of the regulator. The LX8585/85A SOA protection system is designed to be able to supply some output current for all values of input-to-output voltage, up to the device breakdown voltage. Under some conditions, a correctly operating SOA circuit may prevent a power supply system from returning to regulated operation after removal of an intermittent short circuit at the output of the regulator. This is a normal mode of operation which can be seen in most similar products, including older devices such as 7800 series regulators. It is most likely to occur when the power system input voltage is relatively high and the load impedance is relatively low. When the power system is started “cold”, both the input and output voltages are very close to zero. The output voltage closely follows the rising input voltage, and the input-to-output voltage difference is small. The SOA circuit therefore permits the regulator to supply large amounts of current as needed to develop the designed voltage level at the regulator output. Now consider the case where the regulator is supplying regulated voltage to a resistive load under steady state conditions. A moderate input-to-output voltage appears across the regulator but the voltage difference is small enough that the SOA circuitry allows sufficient current to flow through the regulator to develop the designed output voltage across the load resistance. If the output resistor is short circuited to ground, the input-to-output voltage difference across the regulator suddenly becomes larger by the amount of voltage that had appeared across the load resistor. The SOA circuit reads the increased input-to-output voltage, and cuts back the amount of current that it will permit the regulator to supply to its output terminal. When the short circuit across the output resistor is removed, all the regulator output current will again flow through the output resistor. The maximum current that the regulator can supply to the resistor will be limited by the SOA circuit, based on the large input-to-output voltage across the regulator at the time the short circuit is removed from the output. bs ol et e Input 10µF 10µF Power Supply WWW . Microsemi .C OM The LX8585/85A Series ICs are easy to use Low-Dropout (LDO) voltage regulators. They have all of the standard selfprotection 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 LX8585/85A 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 solid tantalum capacitor between the output terminal and ground will guarantee stable operation. If a bypass capacitor is connected between the output voltage adjust (ADJ) pin and ground, ripple rejection will be improved (please see the section entitled “RIPPLE REJECTION”). When ADJ pin bypassing is used, the required output capacitor value increases. Output capacitor values of 220μF (aluminum) or 47μF (tantalum) provide for all cases of bypassing the ADJ pin. If an ADJ pin bypass capacitor is not used, smaller output capacitor values are adequate. The table below shows recommended minimum capacitance values for stable operation LX8585-xx / LX858A-xx ® TM 4.6A Low Dropout Positive Regulators P RODUCTION D ATA S HEET APPLICATION NOTE IN VIN LX8585/85A OUT ADJ WWW . Microsemi .C OM VOUT VREF R1 IADJ 50µA R2 VOUT = VREF 1 + R2 + I ADJ R2 R1 bs ol et e OVERLOAD RECOVERY (continued) If this limited current is not sufficient to develop the designed voltage across the output resistor, the voltage will stabilize at some lower value, and will never reach the designed value. Under these circumstances, it may be necessary to cycle the input voltage down to zero in order to make the regulator output voltage return to regulation. RIPPLE REJECTION Ripple rejection can be improved by connecting a capacitor between the ADJ pin and ground. The value of the capacitor should be chosen so that the impedance of the capacitor is equal in magnitude to the resistance of R1 at the ripple frequency. The capacitor value can be determined by using this equation: C = 1 / (6.28 * FR * R1) where: C ≡ the value of the capacitor in Farads; select an equal or larger standard value. FR ≡ the ripple frequency in Hz R1 ≡ the value of resistor R1 in ohms ⎛ R2 + R1 ⎞ ⎟ ⎝ R1 ⎠ R Peff = R P * ⎜ where: RP ≡ Actual parasitic line resistance. When the circuit is connected as shown in Figure 7, the parasitic resistance appears as its actual value, rather than the higher RPeff IN LX8585/85A OUT ADJ R1 O VIN RP Parasitic Line Resistance R2 Connect R1 to Case of Regulator RL Connect R2 to Load Figure 7 – Connections For Best Load Regulation Copyright © 1997 Rev. 2.2a, 2005-11-10 Microsemi Integrated Products Division 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 Page 6 APPLICATIONS At a ripple frequency of 120Hz, with R1 = 100Ω: C = 1 / (6.28 * 120Hz * 100Ω) = 13.3μF The closest equal or larger standard value should be used, in this case, 15μF. When an ADJ pin bypass capacitor is used, output ripple amplitude will be essentially independent of the output voltage. If an ADJ pin bypass capacitor is not used, output ripple will be proportional to the ratio of the output voltage to the reference voltage: M = VOUT/VREF where: M ≡ a multiplier for the ripple seen when the ADJ pin is optimally bypassed. VREF = 1.25V. For example, if VOUT = 2.5V the output ripple will be: M = 2.5V/1.25V= 2 Output ripple will be twice as bad as it would be if the ADJ pin were to be bypassed to ground with a properly selected capacitor. OUTPUT VOLTAGE The LX8585/85A ICs develop a 1.25V reference voltage between the output and the adjust terminal (See Figure 6). By placing a resistor, R1, between these two terminals, a constant current is caused to flow through R1 and down through R2 to set the overall output voltage. Normally this current is the specified minimum load current of 10mA. Because IADJ is very small and constant when compared with the current through R1, it represents a small error and can usually be ignored. Figure 6 – Basic Adjustable Regulator LOAD REGULATION Because the LX8585/85A regulators are three-terminal devices, it is not possible to provide true remote load sensing. Load regulation will be limited by the resistance of the wire connecting the regulator to the load. The data sheet specification for load regulation is measured at the bottom of the package. Negative side sensing is a true Kelvin connection, with the bottom of the output divider returned to the negative side of the load. Although it may not be immediately obvious, best load regulation is obtained when the top of the resistor divider, (R1), is connected directly to the case of the regulator, not to the load. This is illustrated in Figure 7. If R1 were connected to the load, the effective resistance between the regulator and the load would be: LX8585-xx / LX858A-xx ® TM 4.6A Low Dropout Positive Regulators P RODUCTION D ATA S HEET APPLICATION NOTE can be used, as long as its added contribution to thermal resistance is considered. Note that the case of all devices in this series is electrically connected to the output. Copyright © 1997 Rev. 2.2a, 2005-11-10 TJ TC R JT TS R TA R CS SA First, find the maximum allowable thermal resistance of the heat sink: R ΘSA = ( TJ − TA PD − (R ΘJT + R ΘCS ) ) PD = VIN(MAX) − VOUT I OUT = (5.0V − 2.8V) * 5.0A = 11.0W R ΘSA = 125°C − 50°C (5.0V − 2.8V) * 5.0A − (2.7°C/W + 1.0°C/W) = 3.1°C/W Next, select a suitable heat sink. The selected heat sink must have RΘSA < 3.1°C/W. Thermalloy heatsink 6296B has RΘSA = 3.0°C/W with 300ft/min airflow. Finally, verify that junction temperature remains within specification using the selected heat sink: APPLICATIONS O bs ol et e Example Given: VIN = 5V VOUT = 2.8V, IOUT = 5.0A Ambient Temp. TA = 50°C RΘJT = 2.7°C/W for TO-220 300 ft/min airflow available Find: Proper Heat Sink to keep IC’s junction temperature below 125°C.** Solution: The junction temperature is: TJ = PD (RΘJT + RΘCS + RΘSA) + TA Where: PD ≡ Dissipated Power RΘJT ≡ Thermal resistance from the junction to the mounting tab of the package RΘCS ≡ Thermal resistance through the interface between the IC and the surface on which it is mounted. (1.0°C/W at 6 in-lbs mounting screw torque). RΘSA ≡ Thermal resistance from the mounting surface to ambient (thermal resistance of the heat sink). TS ≡ heat sink temperature. WWW . Microsemi .C OM LOAD REGULATION (continued) Even when the circuit is configured optimally, parasitic resistance can be a significant source of error. A 100 mil (2.54 mm) wide PC trace built from 1 oz. copper-clad circuit board material has a parasitic resistance of about 5 milliohms per inch of its length at room temperature. If a 3-terminal regulator used to supply 2.50 volts is connected by 2 inches of this trace to a load which draws 5 amps of current, a 50 millivolt drop will appear between the regulator and the load. Even when the regulator output voltage is precisely 2.50 volts, the load will only see 2.45 volts, which is a 2% error. It is important to keep the connection between the regulator output pin and the load as short as possible, and to use wide traces or heavy-gauge wire. The minimum specified output capacitance for the regulator should be located near the regulator package. If several capacitors are used in parallel to construct the power system output capacitance, any capacitors beyond the minimum needed to meet the specified requirements of the regulator should be located near the sections of the load that require rapidly-changing amounts of current. Placing capacitors near the sources of load transients will help ensure that power system transient response is not impaired by the effects of trace impedance. To maintain good load regulation, wide traces should be used on the input side of the regulator, especially between the input capacitors and the regulator. Input capacitor ESR must be small enough that the voltage at the input pin does not drop below VIN (MIN) during transients. VIN (MIN) = VOUT + VDROPOUT (MAX) where: VIN (MIN) ≡ the lowest allowable instantaneous voltage at the input pin. VOUT ≡ the designed output voltage for the power supply system. VDROPOUT (MAX) ≡ the specified dropout voltage for the installed regulator. THERMAL CONSIDERATIONS The LX8585/85A regulators have internal power and thermal limiting circuitry designed to protect each device under overload conditions. For continuous normal load conditions, however, maximum junction temperature ratings must not be exceeded. It is important to give careful consideration to all sources of thermal resistance from junction to ambient. This includes junction to case, case to heat sink interface, and heat sink thermal resistance itself. Junction-to-case thermal resistance is specified from the IC junction to the back surface of the case directly opposite the die. This is the lowest resistance path for heat flow. Proper mounting is required to ensure the best possible thermal flow from this area of the package to the heat sink. Thermal compound at the case-to heat-sink interface is strongly recommended. If the case of the device must be electrically isolated, a thermally conductive spacer TJ = 11W(2.7°C/W + 1.0°C/W + 3.0°C/W) + 50°C = 124°C **Although the device can operate up to 150°C junction, it is recommended for long term reliability to keep the junction temperature below 125°C whenever possible. Microsemi Integrated Products Division 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 Page 7 LX8585-xx / LX858A-xx ® TM 4.6A Low Dropout Positive Regulators P RODUCTION D ATA S HEET PACKAGE DIMENSIONS WWW . Microsemi .C OM P 3-Pin Plastic TO-220 B S F T Q 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 bs ol et e U Dim A B C D F G H J K L N Q R S T U A 1 2 C 3 H R K D Note: L 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. J G Copyright © 1997 Rev. 2.2a, 2005-11-10 MECHANICALS O N Microsemi Integrated Products Division 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 Page 8 LX8585-xx / LX858A-xx ® TM 4.6A Low Dropout Positive Regulators P RODUCTION D ATA S HEET PACKAGE DIMENSIONS 3-Pin Plastic TO-263 I A D Dim A B C D E F G H I J K M N C 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° bs ol et e B K M N H F WWW . Microsemi .C OM DD E G Note: 0° -8° 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. J Copyright © 1997 Rev. 2.2a, 2005-11-10 MECHANICALS O Seating Plane Microsemi Integrated Products Division 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 Page 9 LX8585-xx / LX858A-xx ® TM 4.6A Low Dropout Positive Regulators P RODUCTION D ATA S HEET NOTES O bs ol et e WWW . Microsemi .C OM NOTES PRODUCTION DATA – Information contained in this document is proprietary to Microsemi and is current as of publication date. This document may not be modified in any way without the express written consent of Microsemi. Product processing does not necessarily include testing of all parameters. Microsemi reserves the right to change the configuration and performance of the product and to discontinue product at any time. Copyright © 1997 Rev. 2.2a, 2005-11-10 Microsemi Integrated Products Division 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 Page 10