LX8582A-XX

LIN D O C # : 8582 LX8582A-xx 8 . 5 A L O W D R O P O U T P O S I T I V E R E G U L AT O R S T HE I NFINITE P OWER OF I N N O VAT I O N P RODUCTION D ATA S HEET DESCRIPTION The LX8582A series ICs are low dropout three-terminal positive regulators with 8.5A rated output current. Processor applications such as the Cyrix® 6x86 TM & 6x86LTM , Pentium® Processor and Power PCTM applications requiring fast transient response are ideally suited for this product family. The LX8582A series products are guaranteed to have < 1.3V at 8.5A and are ideal to provide well-regulated outputs of 2.5V to 3.6V using a 5V input supply in the adjustable version, or an output of 3.3V using a 5V input supply in the fixed version. Current limit is trimmed above 8.6A to ensure adequate output current and controlled short-circuit current. Onchip thermal limiting provides protection against any combination of overload that would create excessive junction temperatures. The LX8582A series ICs are available in both the through-hole versions of the industry standard 3-pin TO-220 and TO247 power packages. For use in VRE applications, the LX1431 Programmable Reference in conjunction with this family of regulators offers precision output voltage. See the LX1431 data sheet for information on this product. K E Y F E AT U R E S s THREE-TERMINAL AJUSTABLE OR FIXED OUTPUT s GUARANTEED ≤ 1.3V HEADROOM AT 8.5A s OUTPUT CURRENT OF 8.5A p FAST TRANSIENT RESPONSE p 1% VOLTAGE REFERENCE INITIAL ACCURACY p OUTPUT SHORT CIRCUIT PROTECTION p BUILT-IN THERMAL SHUTDOWN s EVALUATION BOARD AVAILABLE: REQUEST LXE9001 EVALUATION KIT A P P L I C AT I O N S s s s s s s s CYRIX 6x86 & 6x86L APPLICATIONS PENTIUM PROCESSOR SUPPLIES POWER PC SUPPLIES MICROPROCESSOR SUPPLIES LOW VOLTAGE LOGIC SUPPLIES POST REGULATOR FOR SWITCHING SUPPLY LXE9001 EVALUATION BOARD FOR PENTIUM APPLICATIONS AVAILABLE. CONSULT FACTORY. PRODUCT HIGHLIGHT C Y R I X 6 X 8 6 V O LTA G E S U P P LY 3.38V, 8.5A R E G U L AT O R VIN 4.75V 1500µF 6.3V 6MV1500GX from Sanyo IN LX8582A ADJ OUT VREF R1 121 1% R2 205 1% 3.38V at 8.5A 2x 330µF, 6.3V Oscon SA type from Sanyo -or4x 1500µF, 6.3V 6MV1500GX from Sanyo A VA I L A B L E O P T I O N S Part # LX8582A-00 LX8582A-33 PER PAR T # Output Voltage Adjustable 3.3V IADJ = 50µA VOUT = VREF 1 + R2 R1 + IADJ R2 Other voltage options may be available — Please contact factory for details. Application of the LX8582A for the Cyrix 6x86 processor family. This circuit is designed to have less than 130mV dynamic response to a 8.5A load transient. PA C K A G E O R D E R I N F O R M AT I O N TA (°C) 0 to 125 Dropout Voltage 1.3V P Plastic TO-220 3-pin LX8582A-xxCP V Plastic TO-247 3-terminal LX8582A-xxCV "xx" refers to output voltage, please see table above. F O R F U R T H E R I N F O R M AT I O N C A L L ( 7 1 4 ) 8 9 8 - 8 1 2 1 Copyright © 1997 Rev. 1.1 1/97 11861 WESTERN A VENUE , G ARDEN G ROVE , CA. 92841 1 PRODUCT DATABOOK 1996/1997 LX8582A-xx 8 . 5 A L O W D R O P O U T P O S I T I V E R E G U L AT O R S P RODUCTION D ATA S HEET A B S O L U T E M A X I M U M R AT I N G S (Note 1) PACKAGE PIN OUTS TAB IS VOUT 3 2 1 Power Dissipation .................................................................................. Internally Limited Input Voltage ................................................................................................................ 10V Input to Output Voltage Differential ........................................................................... 10V Operating Junction Temperature Plastic (P Package) ................................................................................................ 150°C Storage Temperature Range ...................................................................... -65°C to 150°C Lead Temperature (Soldering, 10 seconds) ............................................................. 300°C 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 the specified terminal. VIN VOUT ADJ / GND* P PACKAGE (Top View) * Pin 1 is GND for fixed voltage versions. T H E R MAL DATA P PACKAGE: THERMAL RESISTANCE-JUNCTION TO TAB, θJT THERMAL RESISTANCE-JUNCTION TO AMBIENT, θ JA V PACKAGE: THERMAL RESISTANCE-JUNCTION TO TAB, θJT THERMAL RESISTANCE-JUNCTION TO AMBIENT, θ JA 1.6°C/W 35°C/W 2.7°C/W 60°C/W TAB ON REVERSE SIDE IS V OUT 3 2 1 VIN VOUT ADJ / GND* V PACKAGE (Top View) * Pin 1 is GND for fixed voltage versions. Junction Temperature Calculation: TJ = TA + (PD x θJA). The θ JA numbers are guidelines for the thermal performance of the device/pc-board system. All of the above assume no ambient airflow. 2 Copyright © 1997 Rev. 1.1 1/97 PRODUCT DATABOOK 1996/1997 LX8582A-xx 8 . 5 A L O W D R O P O U T P O S I T I V E R E G U L AT O R S P RODUCTION D ATA S HEET ELECTRICAL CHARACTERISTICS (Unless otherwise specified, these specifications apply over the operating ambient temperatures for the LX8582A-xxC with 0°C ≤ TA ≤ 125°C; VIN - V OUT = 3V; IOUT = 8.5A. Low duty cycle pulse testing techniques are used which maintains junction and case temperatures equal to the ambient temperature.) LX8582A-00 (Adjustable) Parameter Reference Voltage Line Regulation (Note 2) Load Regulation (Note 2) Thermal Regulation Ripple Rejection (Note 3) Adjust Pin Current Adjust Pin Current Change Dropout Voltage Minimum Load Current Maximum Output Current Temperature Stability Long Term Stability RMS Output Noise (% of VOUT) Symbol VREF Test Conditions LX8582A-00 Min. Typ. Max. 1.238 1.225 1.250 1.250 0.035 0.1 0.01 83 55 0.2 1.1 2 9.2 0.25 0.3 0.003 1.262 1.275 0.2 0.5 0.02 Units V V % % %/W dB µA µA V mA A % % % IOUT = 10mA, TA = 25°C 10mA ≤ IOUT ≤ 8.5A, 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 ≤ 8.5A ∆VOUT (Pwr) TA = 25°C, 20ms pulse VOUT = 3.3V, f =120Hz, COUT = 100µf Tantalum, VIN = 5V CADJ = 10µF, TA = 25°C, IOUT = 8.5A I ADJ ∆IADJ 10mA ≤ IOUT ≤ 8.5A, 1.5V ≤ (VIN - VOUT), VIN ≤ 7V ∆V ∆VREF = 1%, IOUT = 8.5A IOUT(MIN) VIN ≤ 7V IOUT(MAX) 1.4V ≤ (V IN - VOUT), VIN ≤ 7V ∆VOUT (T) ∆VOUT (t) TA = 125°C, 1000 hrs VOUT (RMS) TA = 25°C, 10Hz ≤ f ≤ 10kHz 65 100 5 1.3 10 8.6 1 LX8582A-33 (3.3V Fixed) Parameter Output Voltage (Note 4) Symbol VOUT Test Conditions LX8582A-33 Min. Typ. Max. 3.267 3.235 3.3 3.3 1 2 5 0.01 83 4 1.1 9.2 0.25 0.3 0.003 3.333 3.365 6 10 15 0.02 10 1.3 Units V V mV mV mV %/W dB mA V A % % % VIN = 5V, IOUT = 0mA, TA = 25°C 4.75V ≤ V IN ≤ 10V, 0mA ≤ IOUT ≤ 8.5A, P ≤ PMAX Line Regulation (Note 2) ∆VOUT 4.75V ≤ V IN ≤ 7V (VIN ) 4.75V ≤ VIN ≤ 10V ∆VOUT (IOUT) VIN = 5V, 0mA ≤ IOUT ≤ IOUT (MAX) Load Regulation (Note 2) Thermal Regulation (Note 3) ∆VOUT (Pwr) TA = 25°C, 20ms pulse Ripple Rejection (Note 3) COUT = 100µF (Tantalum), IOUT = 8.5A, TA = 25°C 0mA ≤ IOUT ≤ IOUT (MAX) , 4.75V ≤ VIN ≤ 10V Quiescent Current IQ Dropout Voltage ∆V ∆VOUT = 1%, IOUT = IOUT (MAX) Maximum Output Current IOUT (MAX) VIN ≤ 7V Temperature Stability (Note 3) ∆VOUT (T) Long Term Stability (Note 3) ∆VOUT (t) TA = 125°C, 1000 hours RMS Output Noise (% of VOUT) (Note 3) VOUT (RMS) TA = 25°C, 10Hz ≤ f ≤ 10kHz 60 8.6 1 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 regulation. Note 3. These parameters, although guaranteed, are not tested in production. Copyright © 1997 Rev. 1.1 1/97 3 PRODUCT DATABOOK 1996/1997 LX8582A-xx 8 . 5 A L O W D R O P O U T P O S I T I V E R E G U L AT O R S P RODUCTION D ATA S HEET A P P L I C AT I O N N O T E S The LX8582A is an easy to use Low-Dropout (LDO) voltage regulator. It has 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 LX8582A. Please see the table below for recommended minimum capacitor values. The regulator offers a more tightly controlled reference voltage tolerance and superior reference stability when measured against the older pin-compatible regulator types that it replaces. 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. RECOMMENDED CAPACITOR VALUES INPUT 10µF 10µF Power Supply IN LX8582A ADJ OUT Minumum Load (Larger resistor) Full Load (Smaller resistor) RDSON